Sample records for tau decay tau

  1. Tau lifetime and decays

    E-print Network

    D. A. Epifanov

    2014-07-27

    Recent results of a high-statistics study of tau lepton properties and decays at B factories are reviewed. We discuss measurements of tau lifetime, branching fractions, and spectral functions for several hadronic tau decay modes with $K^0_S$. Results of a search for lepton flavor violating tau decays as well as CP symmetry violation are briefly discussed.

  2. Tau Decays in Pythia 8

    E-print Network

    Philip Ilten

    2012-11-28

    As of version 8.150 of Pythia, the isotropic decay model of tau-leptons has been replaced with sophisticated tau-lepton decay machinery. The decays and spin correlations for tau-leptons in Pythia 8 are described, including the spin correlation algorithm, the available tau-lepton production processes, the tau-lepton decay models, the user interface, and the implementation.

  3. Michel parameters and tau neutrino helicity from decay correlations in Z -> tau+tau-

    Microsoft Academic Search

    D. Buskulic; D. Casper; I. de Bonis; D. Decamp; P. Ghez; C. Goy; J.-P. Lees; M.-N. Minard; P. Odier; B. Pietrzyk; F. Ariztizabal; M. Chmeissani; J. M. Crespo; I. Efthymiopoulos; E. Fernandez; M. Fernandez-Bosman; V. Gaitan; Ll. Garrido; M. Martinez; S. Orteu; A. Pacheco; C. Padilla; F. Palla; A. Pascual; J. A. Perlas; F. Sanchez; F. Teubert; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; N. Marinelli; S. Natali; S. Nuzzo; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; X. Huang; J. Lin; Q. Ouyang; T. Wang; Y. Xie; R. Xu; S. Xue; J. Zhang; L. Zhang; W. Zhao; G. Bonvicini; M. Cattaneo; P. Comas; P. Coyle; H. Drevermann; A. Engelhardt; R. W. Forty; M. Frank; G. Ganis; M. Girone; R. Hagelberg; J. Harvey; R. Jacobsen; B. Jost; J. Knobloch; I. Lehraus; M. Maggi; C. Markou; E. B. Martin; P. Mato; H. Meinhard; A. Minten; R. Miquel; P. Palazzi; J. R. Pater; P. Perrodo; J.-F. Pusztaszeri; F. Ranjard; L. Rolandi; D. Schlatter; M. Schmelling; W. Tejessy; I. R. Tomalin; R. Veenhof; A. Venturi; H. Wachsmuth; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Barres; C. Boyer; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; S. Monteil; J.-C. Montret; D. Pallin; P. Perret; F. Podlyski; J. Proriol; J.-M. Rossignol; F. Saadi; T. Fearnley; J. B. Hansen; J. D. Hansen; P. H. Hansen; S. D. Johnson; B. S. Nilsson; A. Kyriakis; E. Simopoulou; I. Siotis; A. Vayaki; K. Zachariadou; A. Blondel; G. Bonneaud; J. C. Brient; P. Bourdon; L. Passalacqua; A. Rougé; M. Rumpf; R. Tanaka; A. Valassi; M. Verderi; H. Videau; D. J. Candlin; M. I. Parsons; E. Veitch; E. Focardi; G. Parrini; M. Corden; M. Delfino; C. Georgiopoulos; D. E. Jaffe; A. Antonelli; G. Bencivenni; G. Bologna; F. Bossi; P. Campana; G. Capon; F. Cerutti; V. Chiarella; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; M. Pepe-Altarelli; S. Salomone; P. Colrain; I. Ten Have; I. G. Knowles; J. G. Lynch; W. Maitland; W. T. Morton; C. Raine; P. Reeves; J. M. Scarr; K. Smith; M. G. Smith; A. S. Thompson; S. Thorn; R. M. Turnbull; U. Becker; O. Braun; C. Geweniger; G. Graefe; P. Hanke; V. Hepp; E. E. Kluge; A. Putzer; B. Rensch; M. Schmidt; J. Sommer; H. Stenzel; K. Tittel; M. Wunsch; R. Beuselinck; D. M. Binnie; W. Cameron; D. J. Colling; P. J. Dornan; N. Konstantinidis; L. Moneta; A. Moutoussi; J. Nash; G. San Martin; J. K. Sedgbeer; A. M. Stacey; G. Dissertori; P. Girtler; E. Kneringer; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Keemer; M. Nuttall; A. Patel; T. Sloan; S. W. Snow; E. P. Whelan; A. Galla; A. M. Greene; K. Kleinknecht; J. Raab; B. Renk; H.-G. Sander; H. Schmidt; S. M. Walther; R. Wanke; B. Wolf; J. J. Aubert; A. M. Bencheikh; C. Benchouk; A. Bonissent; G. Bujosa; D. Calvet; J. Carr; C. Diaconu; F. Etienne; M. Thulasidas; D. Nicod; P. Payre; D. Rousseau; M. Talby; I. Abt; R. Assmann; C. Bauer; W. Blum; D. Brown; H. Dietl; F. Dydak; C. Gotzhein; A. W. Halley; K. Jakobs; H. Kroha; G. Lütjens; G. Lutz; W. Männer; H.-G. Moser; R. Richter; A. Rosado-Schlosser; A. S. Schwarz; R. Settles; H. Seywerd; U. Stierlin; R. St. Denis; G. Wolf; R. Alemany; J. Boucrot; O. Callot; A. Cordier; F. Courault; M. Davier; L. Duflot; J.-F. Grivaz; Ph. Heusse; M. Jacquet; P. Janot; D. W. Kim; F. Le Diberder; J. Lefrançois; A.-M. Lutz; G. Musolino; I. Nikolic; H. J. Park; I. C. Park; M.-H. Schune; S. Simion; J.-J. Veillet; I. Videau; D. Abbaneo; G. Bagliesi; G. Batignani; S. Bettarini; U. Bottigli; C. Bozzi; G. Calderini; M. Carpinelli; M. A. Ciocci; V. Ciulli; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; F. Forti; A. Giassi; M. A. Giorgi; A. Gregorio; F. Ligabue; A. Lusiani; P. S. Marrocchesi; A. Messineo; G. Rizzo; G. Sanguinetti; A. Sciabà; P. Spagnolo; J. Steinberger; R. Tenchini; G. Tonelli; G. Triggiani; C. Vannini; P. G. Verdini; J. Walsh; A. P. Betteridge; G. A. Blair; L. M. Bryant; Y. Gao; M. G. Green; D. L. Johnson; T. Medcalf; Ll. M. Mir; J. A. Strong; V. Bertin; D. R. Botterill; R. W. Clifft; T. R. Edgecock; S. Haywood; M. Edwards; P. Maley; P. R. Norton; J. C. Thompson; B. Bloch-Devaux; P. Colas; H. Duarte; S. Emery; W. Kozanecki; E. Lançon; M. C. Lemaire; E. Locci; B. Marx; P. Perez; J. Rander; J.-F. Renardy; A. Rosowsky; A. Roussarie; J.-P. Schuller; J. Schwindling; D. Si Mohand; A. Trabelsi; B. Vallage; R. P. Johnson; A. M. Litke; G. Taylor; J. Wear; A. Beddall; C. N. Booth; R. Boswell; S. Cartwright; F. Combley; I. Dawson; A. Koksal; M. Letho; W. M. Newton; C. Rankin; L. F. Thompson; A. Böhrer; S. Brandt; G. Cowan; E. Feigl; C. Grupen; G. Lutters; J. Minguet-Rodriguez; F. Rivera; P. Saraiva; U. Schäfer; L. Smolik; L. Bosisio; R. della Marina; G. Giannini; B. Gobbo; L. Pitis; F. Ragusa; H. Kim; J. Rothberg; S. Wasserbaech; S. R. Armstrong

    1995-01-01

    The Michel parameters and the average tau-neutrino helicity are measured using correlations between the decays of the tau+ and tau- produced on the Z resonance and observed in the ALEPH detector at LEP. The Michel parameters, rhol, etal, xil, (deltaxi)l, are determined from tau -> lnulnutau with l = (e, mu), and the average tau neutrino helicity, , from tau

  4. Review of tau lepton decays

    SciTech Connect

    Stoker, D.P.

    1991-07-01

    Measurements of the {tau} decay modes are reviewed and compared with the predictions of the Standard Model. While the agreement is generally good, the status of the 1-prong puzzle'' remains controversial and a discrepancy between the measured leptonic branching fractions and the {tau} lifetime persists. Prospects for precision measurements at a Tau-Charm Factory are also reviewed. 20 refs., 2 tabs.

  5. Rare tau decays at Belle

    E-print Network

    K. Hayasaka; for the Belle collaboration

    2011-11-07

    We report results of a search for tau lepton decays strongly suppressed in the Standard Model based on the world-largest data sample accumulated with the Belle detector at the KEKB asymmetric-energy e+e- collider. The decays include: lepton flavor and lepton number violating tau decays into a lepton (e or mu) and two charged mesons (K or pi) as well as lepton and baryon number violating tau decays into a Lambda and a charged meson (K or pi). The sensitivity to the branching fractions is significantly improved compared to our previous results and reaches O(10^{-8}).

  6. B Decays with tau at Belle

    SciTech Connect

    Hara, Koji [High Energy Physics Laboratory, Nagoya University, Furou-cho chikusa-ku Nagoya, Aichi, 464-8602 (Japan)

    2010-02-10

    B decays with {tau} are sensitive to a charged Higgs predicted by extensions of the Standard Model such as the Two Higgs Doublet Models and the Minimal Supersymmetric Standard Model. We report measurements of the decays B+->{tau}{sup +}{nu}{sub {tau}}, B->D*{tau}{nu}{sub {tau}} and B->D{tau}{nu}{sub {tau}} using a large data sample of BB-bar pairs collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. We observe a signal of B{sup 0}->D*{sup -}{tau}{sup +}{nu}{sub {tau}} decay with a significance of 5.2 {sigma} and find evidences of B{sup +}->{tau}{sup +}{nu}{sub {tau}} and D-bar{sup 0}{tau}{sup +}{nu}{sub {tau}} decays with significances more than 3 {sigma}.

  7. CP violation in hadronic {tau} decays

    SciTech Connect

    Datta, Alakabha [Dept of Physics and Astronomy, 108 Lewis Hall, University of Mississippi, Oxford, Mississippi 38677-1848 (United States); Kiers, Ken [Physics Department, Taylor University, 236 West Reade Avenue, Upland, Indiana, 46989 (United States); London, David; Szynkman, Alejandro [Physique des Particules, Universite de Montreal, C.P. 6128, succursale centre-ville, Montreal, QC, H3C 3J7 (Canada); O'Donnell, Patrick J. [Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON, M5S 1A7 (Canada)

    2007-04-01

    We reexamine CP violation in the {delta}S=0 decays {tau}{yields}N{pi}{nu}{sub {tau}} (N=2,3,4). We assume that the new physics (NP) is a charged Higgs boson. We show that there is no NP contribution to {tau}{yields}{pi}{pi}{nu}{sub {tau}}, which means that no CP violation is expected in this decay. On the other hand, NP can contribute to {tau}{yields}N{pi}{nu}{sub {tau}} (N=3,4). These are dominated by the intermediate resonant decays {tau}{yields}{omega}{pi}{nu}{sub {tau}}, {tau}{yields}{rho}{pi}{nu}{sub {tau}}, and {tau}{yields}a{sub 1}{pi}{nu}{sub {tau}}. We show that the only sizeable CP-violating effects which are possible are in {tau}{yields}a{sub 1}{pi}{nu}{sub {tau}}{yields}4{pi}{nu}{sub {tau}} (polarization-dependent rate asymmetry) and {tau}{yields}{omega}{pi}{nu}{sub {tau}} (triple-product asymmetry)

  8. B -> tau Leptonic and Semileptonic Decays

    E-print Network

    M. Barrett

    2009-03-27

    Decays of B mesons to states involving tau leptons can be used as a tool to search for the effects of new physics, such as those involving a charged Higgs boson. The experimental status of the decays B -> tau nu and B -> D^(*) tau nu is discussed, together with limits on new physics effects from current results.

  9. Tau Decays at BaBar

    SciTech Connect

    Hast, Carsten; /SLAC; ,

    2009-01-22

    Recent results of tau lepton decay studies based on luminosities between 350 fb{sup -1} and 469 fb{sup -1} collected with the BABAR detector at the PEP-II e{sup +}e{sup -} collider at the SLAC National Accelerator Laboratory are presented. The analyses reported here are Charged Current Lepton Universality and measurements of |V{sub us}| using {tau}{sup -} {yields} e{sup -}{bar {nu}}{sub e}{nu}{sub {tau}}, {mu}{sup -}{bar {nu}}{sub {mu}}{nu}{sub {tau}}, {pi}{sup -} {nu}{sub {tau}}, and K{sup -}{nu}{sub {tau}} decays, as well as searches for Second Class Currents in {tau}{sup -} {yields} {omega}{pi}{sup -}{nu}{sub {tau}} decays, studies of Lepton Flavor Violations, and a tau mass measurement and CPT-Test. If not explicitly mentioned, charge conjugate decay modes are also implied. decays, as well as searches for Second Class Currents in {tau}{sup -} {yields} {omega}{pi}{sup -}{nu}{sub {tau}} decays, studies of Lepton Flavor Violations, and a tau mass measurement and CPT-Test. If not explicitly mentioned, charge conjugate decay modes are also implied.

  10. Measurements of the decays tau/sup -/. -->. rho/sup -/. nu. /sub tau/, tau/sup -/. -->. pi. /sup -/. nu. /sub tau/ and tau/sup -/. -->. K*-(892). nu. /sub tau/ using the MARK II detector at SPEAR

    SciTech Connect

    Dorfan, J.

    1981-04-01

    Measurements of the branching fractions for the Cabibbo favored decays tau/sup -/ ..-->.. rho/sup -/ ..-->.. ..pi../sup -/..nu../sub tau/ and the Cabibbo suppressed decay mode tau/sup -/ ..-->.. K*/sup -/ (892)..nu../sub tau/ are presented. The energy dependence of the tau/sup +/tau/sup -/ production cross section is obtained for the decays tau/sup -/ ..-->.. rho/sup -/..nu../sub tau/ and these spectra agree well with the classification of the tau/sup -/ as a spin-1/2 point particle. Fits to the production cross section yield a measurement of M/sub tau/ = (1787 +- 10) MeV/c/sup 2/ for the tau mass. Ninety-five percent confidence upper limits for the forbidden decay tau/sup -/ ..-->.. K*/sup -/(1430)..nu../sub tau/ and the tau neutrino mass are presented.

  11. Study of K* production in tau decay

    Microsoft Academic Search

    M. Goldberg; T. Haupt; N. Horwitz; V. Jain; M. D. Mestayer; G. C. Moneti; Y. Rozen; P. Rubin; V. Sharma; T. Skwarnicki; M. Thulasidas; G. Zhu; S. E. Csorna; T. Letson; J. Alexander; M. Artuso; C. Bebek; K. Berkelman; T. Browder; D. G. Cassel; E. Cheu; D. M. Coffman; G. Crawford; J. W. Dewire; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; A. M. Halling; D. L. Hartill; B. K. Heltsley; K. Honscheid; J. Kandaswamy; N. Katayama; D. L. Kreinick; J. D. Lewis; G. S. Ludwig; J. Masui; N. B. Mistry; J. Mevissen; S. Nandi; E. Nordberg; C. O'Grady; D. Peterson; M. Pisharody; D. Riley; M. Sapper; M. Selen; A. Silverman; S. Stone; H. Worden; M. Worris; A. J. Sadoff; P. Avery; D. Besson; L. Garren; J. Yelton; K. Kinoshita; F. M. Pipkin; M. Procario; Richard Wilson; J. Wolinski; D. Xiao; Y. Zhu; R. Ammar; P. Baringer; D. Coppage; P. Haas; N. Kwak; Ha Lam; S. Ro; Y. Kubota; J. K. Nelson; D. Perticone; R. Poling; R. Fulton; T. Jensen; D. R. Johnson; H. Kagan; R. Kass; F. Morrow; J. Whitmore; P. Wilson; D. Bortoletto; W.-Y. Chen; J. Dominick; R. L. McIlwain; D. H. Miller; C. R. Ng; S. F. Schaffner; E. I. Shibata; I. P. J. Shipsey; W.-M. Yao; K. Sparks; E. H. Thorndike; C.-H. Wang; M. S. Alam; I. J. Kim; W. C. Li; V. Romero; C. R. Sun; P.-N. Wang; M. M. Zoeller

    1990-01-01

    We report on a study of charged and neutral K* production in tau decay. We obtain a branching ratio value BR(tau--->K*-nutauX0) = (1.43+\\/-0.11+\\/-0.13)% where X0 designates possible unobserved neutral particles (charge conjugate modes are implicit). We observe the first signals for inclusive K*0 and K¯*0 production in tau- decay, and determine the inclusive branching ratios tau--->K*0K-nutauX0 and tau-K¯*0pi-nutauX0 to be

  12. Decays of the tau lepton

    SciTech Connect

    Burchat, P.R.

    1986-02-01

    Previous measurements of the branching fractions of the tau lepton result in a discrepancy between the inclusive branching fraction and the sum of the exclusive branching fractions to final states containing one charged particle. The sum of the exclusive branching fractions is significantly smaller than the inclusive branching fraction. In this analysis, the branching fractions for all the major decay modes are measured simultaneously with the sum of the branching fractions constrained to be one. The branching fractions are measured using an unbiased sample of tau decays, with little background, selected from 207 pb/sup -1/ of data accumulated with the Mark II detector at the PEP e/sup +/e/sup -/ storage ring. The sample is selected using the decay products of one member of the ..gamma../sup +/..gamma../sup -/ pair produced in e/sup +/e/sup -/ annihilation to identify the event and then including the opposite member of the pair in the sample. The sample is divided into subgroups according to charged and neutral particle multiplicity, and charged particle identification. The branching fractions are simultaneously measured using an unfold technique and a maximum likelihood fit. The results of this analysis indicate that the discrepancy found in previous experiments is possibly due to two sources. First, the leptonic branching fractions measured in this analysis are about one standard deviation higher than the world average. The measured leptonic branching fractions correspond to a tau lifetime of (3.0 +- 0.2) x 10/sup -13/ s. Secondly, the total branching fraction to one charged hadron plus at least one neutral particle is measured to be (7 +- 3)% higher than the branching fraction expected from a combination of previous measurements and theoretical predictions. It is shown that decay modes involving the eta are not expected to contribute more than 3% to this excess.

  13. Improved measurement of $\\psi (2S)$ decays into $\\tau ^{+}\\tau ^{-}$

    E-print Network

    Ablikim, M; Ban, Y; Bian, J G; Cai, X; Chen, H F; Chen, H S; Chen, H X; Chen, J C; Jin, C; Chen, Y B; Chi, S P; Chu, Y P; Cui, X Z; Dai, Y S; Diao, L Y; Deng, Z Y; Dong, Q F; Du, S X; Fang, J; Fang, S S; Fu, C D; Gao, C S; Gao, Y N; Gu, S D; Gu, Y T; Guo, Y N; Guo, Y Q; Guo, Z J; Harris, F A; He, K L; He, M; Heng, Y K; Hu, H M; Hu, T; Huang, G S; Huang, X T; Ji, X B; Jiang, X S; Jiang, X Y; Jiao, J B; Jin, D P; Jin, S; Yi, J; Lai, Y F; Li, G; Li, H B; Li, H H; Li, J; Li, R Y; Li, S M; Li, W D; Li, W G; Li, X L; Li, X N; Li, X Q; Li, Y L; Liang, Y F; Liao, H B; Liu, B J; Liu, C X; Liu, F; Fang, L; Liu, H H; Liu, H M; Liu, J; Liu, J B; Liu, J P; Liu, Q; Liu, R G; Liu, Z A; Lou, Y C; Lu, F; Lu, G R; Lu, J G; Luo, C L; Ma, F C; Ma, H L; Ma, L L; Ma, Q M; Ma, X B; Mao, Z P; Mo, X H; Nie, J; Olsen, S L; Peng, H P; Ping, R G; Qi, N D; Qin, H; Qiu, J F; Ren, Z Y; Rong, G; Shan, L Y; Shang, L; Shen, C P; Shen, D L; Shen, X Y; Sheng, H Y; Sun, H S; Sun, J F; Sun, S S; Sun, Y Z; Sun, Z J; Tan, Z Q; Tang, X; Tong, G L; Varner, G S; Wang, D Y; Wang, L; Wang, L L; Wang, L S; Wang, M; Wang, P; Wang, P L; Wang, W F; Wang, Y F; Wang, Z; Wang, Z Y; Zhe, W Z W; Wei, C L; Wei, D H; Wu, N; Xia, X M; Xie, X X; Xu, G F; Xu, X P; Xu, Y; Yan, M L; Yang, H X; Yang, Y X; Ye, M H; Ye, Y X; Yi, Z Y; Yu, G W; Yuan, C Z; Yuan, J M; Yuan, Y; Zang, S L; Zeng, Y; Zhang, B X; Zhang, B Y; Zhang, C C; Zhang, D H; Zhang, H Q; Zhang, H Y; Zhang, J W; Zhang, J Y; Zhang, S H; Zhang, X M; Zhang, X Y; Yiyun, Z; Zhang, Z P; Zhao, D X; Zhao, J W; Zhao, M G; Zhao, P P; Zhao, W R; Zhao, Z G; Zheng, H Q; Zheng, J P; Zheng, Z P; Zhou, L; Zhou, N F; Zhu, K J; Zhu, Q M; Zhu, Y C; Zhu, Y S; Yingchun, Z; Zhu, Z A; Zhuang, B A; Zhuang, X A; Zou, B S

    2006-01-01

    Using 14M $\\psi (2S)$ events collected at BESII, the branching fraction of $\\psi (2S)\\to \\tau ^{+}\\tau ^{-}$ is measured to be $Br_{\\tau \\tau}=(3.10\\pm 0.21\\pm 0.38)\\times 10^{-3}$, where the first error is statistical and the second is systematic.

  14. B to tau Leptonic and Semileptonic Decays

    SciTech Connect

    Barrett, M.; /Brunel U.

    2011-11-17

    Decays of B mesons to states involving {tau} leptons can be used as a tool to search for the effects of new physics, such as those involving a charged Higgs boson. The experimental status of the decays B {yields} {tau}{nu} and B {yields} D{sup (*)}{tau}{nu} is discussed, together with limits on new physics effects from current results. Leptonic and semileptonic decays of B mesons into states involving {tau} leptons remain experimentally challenging, but can prove a useful tool for constraining Standard Model parameters, and also offer to constrain the effects of any new physics that may exist including the presence of a charged Higgs boson.

  15. Measurement of alphas from tau decays

    Microsoft Academic Search

    T. Coan; J. Dominick; V. Fadeyev; I. Korolkov; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; M. Artuso; M. Gao; M. Goldberg; D. He; N. Horwitz; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; S. Stone; X. Xing; G. Zhu; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; D. Gibaut; K. Kinoshita; P. Pomianowski; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'Grady; J. Urheim; A. J. Weinstein; F. Würthwein; D. M. Asner; M. Athanas; D. W. Bliss; W. S. Brower; G. Masek; H. P. Paar; M. Sivertz; J. Gronberg; C. M. Korte; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. Roberts; A. Ryd; H. Tajima; M. S. Witherell; R. Balest; K. Cho; W. T. Ford; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; M. Dickson; P. S. Drell; D. J. Dumas; R. Ehrlich; R. Elia; P. Gaidarev; R. S. Galik; M. Garcia-Sciveres; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; S. Henderson; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; Y. Liu; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; A. Soffer; P. Avery; A. Freyberger; K. Lingel; J. Rodriguez; S. Yang; J. Yelton; G. Brandenburg; D. Cinabro; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; K. W. McLean; M. Ogg; A. Bellerive; D. I. Britton; E. R. F. Hyatt; R. Janicek; D. B. Macfarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; S. Kotov; I. Kravchenko; N. Kwak; H. Lam; Y. Kubota; M. Lattery; M. Momayezi; J. K. Nelson; S. Patton; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; Z. Ling; A. H. Mahmood; J. J. O'Neill; H. Severini; C. R. Sun; F. Wappler; G. Crawford; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; M. Sung; C. White; A. Wolf; M. M. Zoeller; X. Fu; B. Nemati; W. R. Ross; P. Skubic; M. Wood; M. Bishai; J. Fast; E. Gerndt; J. W. Hinson; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; D. Payne; E. I. Shibata; I. P. J. Shipsey; P. N. Wang; L. Gibbons; Y. Kwon; S. Roberts; E. H. Thorndike

    1995-01-01

    We present measurements of spectral moments extracted from the invariant mass distributions of the final states of hadronic tau decay products recorded in the CLEO detector. From a fit of theoretical predictions to the measurements of spectral moments and the total hadronic decay width of the tau, we determine the strong coupling constant and a set of non-perturbative QCD parameters.

  16. Charged Kaon Production in Tau Lepton Decays.

    NASA Astrophysics Data System (ADS)

    Mills, Geoffrey Blount

    The result of an experiment performed at the PEP e('+)e('-) storage ring which operated at 29.0 GeV/c('2) is presented. The DELCO detector, which emphasizes Cherenkov particle identification, is used to measured the production of charged kaons in (tau) decays. The. branching ratio of the Cabibbo-suppressed decays b((tau)('(+OR-)) (--->) K('(+OR-)) (nu)(,(tau))) = (0.57 (+OR-) 0.15)%, b((tau)('(+OR-)) (--->) K('(+OR-))(nu)(,(tau)) + n(pi)('0)) = (1.59 (+OR-) 0.23)% n (GREATERTHEQ) 0, and. (DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI). are measured, and the branching ratio of the Cabibbo -favored decay. (DIAGRAM, TABLE OR GRAPHIC OMITTED...PLEASE SEE DAI). is measured. These branching ratio measurements provide a test e - (mu) - (tau) universality and are in agreement with and the predictions of SU(3) sum rules. The invariant mass distribution of the K('+)K('-)(pi) system in the exclusive (tau)('(+OR-)) (--->) K('+)K('-)(pi)('(+OR -))(nu)(,(tau)) channel is used to set a limit of 157 MeV/c('2) at 95% CL on the (tau) neutrino mass.

  17. Precision Measurements of Tau Lepton Decays

    SciTech Connect

    Nugent, Ian M.; /Victoria U.

    2010-03-16

    Using data collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a center-of-mass energy near 10.58 GeV, the branching fractions {Beta}({tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}}) = (8.83 {+-} 0.01 {+-} 0.13)%, {Beta}({tau}{sup -} {yields} K{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}}) = (0.273 {+-} 0.002 {+-} 0.009)%, {Beta}({tau}{sup -} {yields} K{sup -}{pi}{sup -}K{sup +}{nu}{sub {tau}}) = (0.1346 {+-} 0.0010 {+-} 0.0036)%, and {Beta}({tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu}{sub {tau}}) = (1.58 {+-} 0.13 {+-} 0.12) x 10{sup -5} are measured where the uncertainties are statistical and systematic, respectively. The invariant mass distribution for the {tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}} {yields} K{sup -}{pi}{sup -}{pi}{sup +}{nu}{sub {tau}}, {tau}{sup -} {yields} K{sup -}{pi}{sup -}K{sup +}{nu}{sub {tau}} and {tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu}{sub {tau}} decays are unfolded to correct for detector effects. A measurement of {Beta}({tau}{sup -} {yields} {phi}{pi}{sup -}{nu}{sub {tau}}) = (3.42 {+-} 0.55 {+-} 0.25) x 10{sup -5}, a measurement of {Beta}({tau}{sup -} {yields} {phi}K{sup -}{nu}{sub {tau}}) = (3.39 {+-} 0.20 {+-} 0.28) x 10{sup -5} and an upper limit on {Beta}({tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu}{sub {tau}}[ex.{phi}]) {le} 2.5 x 10{sup -6} {at} 905 CL are determined from a binned maximum likelihood fit of the {tau}{sup -} {yields} K{sup -}{pi}{sup -}K{sup +}{nu}{sub {tau}} and {tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu}{sub {tau}} K{sup +}K{sup -} invariant mass distributions. The branching ratio {Beta}({tau}{sup -} {yields} K{sup -}{nu}{sub {tau}})/{Beta}({tau}{sup -} {yields} {pi}{sup -}{nu}{sub {tau}}) is measured to be (6.531 {+-} 0.056 {+-} 0.093) x 10{sup -2} from which |V{sub us}| is determined to be 0.2255 {+-} 0.0023. The branching ratio {Beta}/({tau}{sup -} {yields} {mu}{nu}{sub {tau}}{bar {nu}}{sub {mu}})/{Beta}({tau}{sup -} {yields} e{sup -} {nu}{sub {tau}}{bar {nu}}{sub e}) = (9.796 {+-} 0.016 {+-} 0.035) x 10{sup -1} is measured enabling a precision test of the Standard Model assumption of charged current lepton universality, g{sub {mu}}/g{sub e} = 1.0036 {+-} 0.0020. The branching ratios {Beta}({tau}{sup -} {yields} K{sup -}{nu}{sub {tau}})/{Beta}({tau}{sup -} {yields} e{sup -}{nu}{sub {tau}}{bar {nu}}{sub e}) = (3.882 {+-} 0.032 {+-} 0.057) x 10{sup -2}, and {Beta}({tau}{sup -} {yields} {pi}{sup -}{nu}{sub {tau}})/{Beta}({tau}{sup -} {yields} e{nu}{sub {tau}}{bar {nu}}{sub e}) = (5.9545 {+-} 0.014 {+-} 0.061) x 10{sup -1} are measured which provide additional tests of charged current lepton universality, (g{sub {tau}}/g{sub {mu}}){sub {pi}} = 0.9856 {+-} 0.0057 and (g{sub {tau}}/g{sub {mu}}){sub K} = 0.9827 {+-} 0.0086 which can be combined to give (g{sub {tau}}/g{sub {mu}}){sub {pi}/K} = 0.9850 {+-} 0.0054. Any deviation of these measurements from the expected Standard Model values would be an indication of new physics.

  18. Tensor mesons produced in tau lepton decays

    SciTech Connect

    Lopez Castro, G.; Munoz, J. H. [Departamento de Fisica, Cinvestav, Apartado Postal 14-740, 07000 Mexico, D.F. (Mexico); Departamento de Fisica, Universidad del Tolima, Apartado Aereo 546, Ibague (Colombia) and Centro Brasileiro de Pesquisas Fisicas, Rua Xavier Sigaud 150, 22290-180, Rio de Janeiro, RJ (Brazil)

    2011-05-01

    Light tensor mesons (T=a{sub 2}, f{sub 2} and K{sub 2}*) can be produced in decays of {tau} leptons. In this paper we compute the branching ratios of {tau}{yields}T{pi}{nu} decays by assuming the dominance of intermediate virtual states to model the form factors involved in the relevant hadronic matrix elements. The exclusive f{sub 2}(1270){pi}{sup -} decay mode turns out to have the largest branching ratio, of O(10{sup -4}). Our results indicate that the contribution of tensor meson intermediate states to the three-pseudoscalar channels of {tau} decays are rather small.

  19. Inclusive. eta. production in. tau. decays

    SciTech Connect

    Abachi, S.; Akerlof, C.; Baringer, P.; Blockus, D.; Brabson, B.; Brom, J.M.; Bylsma, B.G.; Chapman, J.; Cork, B.; De Bonte, R.; Derrick, M.; Errede, D.; Jung, C.; Ken, M.; Koltick, D.S.; Kooijman, P.; Loos, J.S.; Low, E.H.; McIlwain, R.L.; Meyer, D.I.; Miller, D.H.; Musgrave, B.; Neal, H.; Ng, C.R.; Nitz, D.; Ogren, H.; Paik, H.W.; Price, L.E.; Rangan, L.K.; Repond, J.; Rust, D.R.; Shibata, E.I.; Sugano, K.; Thun, R.; Tschirhart,

    1987-01-01

    We have searched for inclusive eta production in tau decays using a sample of 2553 events of e{sup +}e{sup minus} {yields} {tau}{sup +}{tau}{sup minus} in the one-three topology. The data were taken with the High Resolution Spectrometer at {radical}s = 29 GeV. Our results are based on an analysis of the {pi}{sup +}{pi}{sup minus} invariant mass spectrum to find the narrow peak resulting from the decay sequence {tau} {yields} {eta}x and {eta} {yields} {pi}{sup +}{pi}{sup minus}{pi}{degree}. No clear peak is observed and a 90% confidence upper limit on the process {tau} {yields} {eta}x of 2.1% is found. For decays {tau} {yields} {eta}{eta}x the 90% confidence upper limit is 1.3%. Our best limit on {tau} {yields} {eta}{eta}x is obtained from tau decay to five charged particles with a 90% confidence level upper limit of 0.5%.

  20. A New Search for tau -> mu gamma and tau -> e gamma Decays at Belle

    E-print Network

    The Belle Collaboration; K. Abe

    2006-09-26

    We update our search for the lepton flavor violating tau -> mu gamma and tau -> e gamma decays based on 535/fb of data accumulated at the Belle experiment. No signal is found and we set preliminary 90% confidence level upper limits: B(tau -> mu gamma) tau -> e gamma) < 1.2x 10^-7.

  1. First observation of the decay tau(-)->K-eta nu(tau)

    E-print Network

    Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan

    1996-05-01

    .6 +/- 0.5 +/- 0.4) x 10(-4), somewhat higher than theoretical estimates. An improved upper limit for the second-class-current decay tau(-) --> pi(-) eta nu(tau) is set, B(tau(-) --> pi(-) eta nu(tau)) < 1.4 x 10(-4) at 95% C.L., consistent with theoretical...

  2. Measurement of tau decays involving eta mesons

    Microsoft Academic Search

    M. Artuso; M. Goldberg; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; S. Playfer; Y. Rozen; P. Rubin; S. Stone; M. Thulasidas; W.-M. Yao; G. Zhu; A. V. Barnes; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; P. Sheldon; D. S. Akerib; B. Barish; M. Chadha; D. F. Cowen; G. Eigen; J. S. Miller; J. Urheim; A. J. Weinstein; D. Acosta; G. Masek; B. Ong; H. Paar; M. Sivertz; A. Bean; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; H. Nelson; J. Richman; H. Tajima; D. Schmidt; D. Sperka; M. Witherell; M. Procario; S. Yang; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; C. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; C. O'grady; J. R. Patterson; D. Peterson; D. Riley; M. Sapper; M. Selen; H. Worden; M. Worris; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; J. Yelton; D. Cinabro; S. Henderson; K. Kinoshita; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; N. Kwak; H. Lam; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'neill; V. Romero; H. Severini; C. R. Sun; P.-N. Wang; M. M. Zoeller; G. Crawford; R. Fulton; K. K. Gan; H. Kagan; R. Kass; J. Lee; R. Malchow; F. Morrow; M. Sung; C. White; J. Whitmore; P. Wilson; F. Butler; X. Fu; G. Kalbfleisch; M. Lambrecht; W. R. Ross; P. Skubic; J. Snow; P.-L. Wang; D. Bortoletto; D. N. Brown; J. Dominick; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; S. F. Schaffner; E. I. Shibata; I. P. Shipsey; M. Battle; J. Ernst; H. Kroha; S. Roberts; K. Sparks; E. H. Thorndike; C.-H. Wang; S. Sanghera; T. Skwarnicki; R. Stroynowski

    1992-01-01

    The decay tau--->nutaupi-pi0eta has been observed for the first time using the CLEO-II detector at the Cornell Electron Storage Ring. The measured branching ratio (0.17+\\/-0.02+\\/-0.02)%, agrees with the CVC (conserved vector current) prediction based on e+e--->pi+pi-eta data. Upper limits on the branching ratios for other tau decays to final states including eta mesons are improved by an order of magnitude

  3. TauSpinner: a tool for simulating CP effects in H to tau tau decays at LHC

    E-print Network

    T. Przedzinski; E. Richter-Was; Z. Was

    2014-06-06

    In this paper, we discuss application of the TauSpinner package as a simulation tool for measuring the CP state of the newly discovered Higgs boson using the transverse spin correlations in the H to tau tau decay channel. We discuss application for its main background Z/gamma* to tau tau as well. The TauSpinner package allows one to add, with the help of weights, transverse spin correlations corresponding to any mixture of scalar/pseudoscalar state, on already existing events using information from the kinematics of outgoing tau leptons and their decay products only. This procedure can be used when polarimetric vectors of the taus decays and density matrix for tau-pair production are not stored with the event sample. We concentrate on the well-defined effects for the Higgs (or Higgs-like scalar) decays, which are physically separated from the production processes. TauSpinner also allows to reintroduce (or remove) spin correlations to events from Drell-Yan Z/gamma* to tau tau process, the main background for the Higgs parity observables, again with the help of weights only. From the literature, we recall well-established observables, developed for measuring the CP of the Higgs, and use them as benchmarks for illustrating applications of the TauSpinner package. We also include a description of the code and prepared testing examples.

  4. Evidence for B+ --> tau+ nu_tau Decays using Hadronic B Tags

    SciTech Connect

    del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Martinelli, M.; Milanes, D.A.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Brown, D.N.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; /UC, Berkeley; Koch, H.; Schroeder, T.; /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Indian Inst. Tech., Guwahati /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /INFN, Naples /Naples U. /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Southern Methodist U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U. /Victoria U. /Warwick U. /Wisconsin U., Madison

    2011-08-11

    We present a search for the decay B{sup +} --> {tau}{sup +} {nu}{sub {tau}} using 467.8 x 10{sup 6} B{anti B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. We select a sample of events with on completely reconstructed B{sup -} in an hadronic decay mode (B{sup -} --> D{sup (*)0}X{sup -} and B{sup -} --> J/{psi} X{sup -}). We examine the rest of the event to search for a B{sup +} --> {tau}{sup +} {nu}{sub {tau}} decay. We identify the {tau}{sup +} lepton in the following modes: {tau}{sup +} --> e{sup +} {nu}{sub e}{anti {nu}}{sub {tau}}, {tau}{sup +} --> {mu}{sup +} {nu}{sub {mu}}{anti {nu}}{sub {tau}}, {tau}{sup +} --> {pi}{sup +}{anti {nu}}{sub {tau}} and {tau}{sup +} --> {rho}{anti {nu}}{sub {tau}}. We find an excess of events with respect to expected background, which excludes the null signal hypothesis at the level of 3.3 {sigma} and can be converted to a branching fraction central value of B(B{sup +} --> {tau}{sup +} {nu}{sub {tau}})= (1.80{sup + 0.57}{sub - 0.54}(stat.) {+-} 0.26 (syst.)) x 10{sup -4}.

  5. Reconstruction and selection of Z{yields}{tau}{tau}{yields}{mu}+{tau}-jet+{nu}'s decays at the CMS experiment

    SciTech Connect

    Lusito, Letizia [Orabona 4, I-70126 Bari (Italy); CERN, CH-1211 Geneve 23 (Switzerland)

    2010-12-22

    At the LHC, tau leptons are expected in final states of many important physics processes including Supersymmetry and the production of Higgs boson(s) and other exotic particles. An efficient and accurate {tau} reconstruction and identification are therefore an important part of the CMS physics programme. Z{sup 0}{yields}{tau}{sup +}{tau}{sup -} decays are often considered the ''standard candle'' of tau reconstruction as they validate tau lepton identification and provide a test bench for Higgs searches (for which they constitute the main irreducible background). We describe techniques for selecting and reconstructing the Z{sup 0}{yields}{tau}{sup {+-}}{tau}{sup {-+}}{yields}{mu}{sup {+-}}{nu}{sub {mu}}{bar {nu}}{sub {tau}}({bar {nu}}{sub {mu}}{nu}{sub {tau}})+{tau}-jet{sup {-+}}{nu}{sub {tau}}({bar {nu}}{sub {tau}}) events that were developed for the measurement of the Z production cross-section by the CMS experiment using 200 pb{sup -1} of the LHC collision data at the center-of-mass energy {radical}(s) 10 TeV. We validate these techniques using simulated events and present a data-driven method for estimating background contributions to this measurement.

  6. Tau polarization in SUSY cascade decays at LHC

    E-print Network

    Kentarou Mawatari

    2007-10-26

    We explore how the polarization of the tau leptons in the cascade decay $\\tilde{q}\\to q\\tilde\\chi^0_2\\to q\\tau\\tilde\\tau\\to q\\tau\\tau\\tilde\\chi^0_1$ can be exploited to study mixing properties of neutralinos and staus. We present details of the analysis including experimental effects such as transverse momentum cuts for the $\\tau\\to\\pi\

  7. Measurement of the decays tau/sup -/. -->. rho/sup -/. nu. /sub tau/ and tau/sup -/. -->. K*/sup -/(892). nu. /sub tau/ using the Mark II detector at SPEAR

    SciTech Connect

    Dorfan, J.

    1980-08-01

    Measurements of the branching fractions for the Cabibbo-favored decay tau/sup -/ ..-->.. rho/sup -/..nu../sub tau/ and the Cabibbo-suppressed decay tau/sup -/ ..-->.. K*/sup -/(892)..nu../sub tau/ are presented. The energy dependence of the tau/sup +/tau/sup -/ production cross section is measured with the aid of the decay tau/sup -/ ..-->.. rho/sup -/..nu../sub tau/, which yields a measurement M/sub tau/ = (1790 +- 40) MeV. A 2 sigma upper limit for the forbidden decay tau/sup -/ ..-->.. K*/sup -/(1430)..nu../sub tau/ is also presented. 3 figures.

  8. First observation of tau->3 pi eta nu(tau) and tau->f(1)pi nu(tau) decays

    E-print Network

    Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan

    1997-09-01

    branching fractions B(tau(-)-->pi(-)pi(-)pi(+)eta nu(tau)) = (3.4-(0.6)(0.5) +/- 0.6) x 10(-4) and B(tau(-) --> pi(-)2 pi(0) eta nu)) = (1.4 +/- 0.6 +/- 0.3) x 10(-4). We observe clear evidence for f(1) --> eta pi pi substructure and measure B...

  9. Hadronic Tau Decays at BaBar

    SciTech Connect

    Nugent, I.M.; /Victoria U.

    2007-10-25

    Precision measurements of the exclusive branching fraction {tau}{sup -} {yields} K{sup -}{pi}{sup 0}{nu}{sub {tau}} and {tau}{sup -} {yields} h{sup -}h{sup -}h{sup +}{nu}{sub {tau}}, where the h represent either a pion or a kaon, from the BABAR Experiment are presented. The branching fraction for {tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu}{sub {tau}} is the first resonant plus non-resonant measurement of this mode and the branching fraction {tau}{sup -} {yields} {phi}{pi}{sup -}{nu}{sub {tau}} is also a first measurement. In addition we present the new measurement of the branching fraction of {tau}{sup -} {yields} {phi}K{sup -}{nu}{sub {tau}}.

  10. tau Decays to Five Mesons in TAUOLA

    E-print Network

    Johann H. Kuhn; Z. Was

    2006-02-17

    The tau-decay library TAUOLA has gained popularity over the last decade. However, with the continuously increasing precision of the data, some of its functionality has become insufficient. One of the requirements is the implementation of decays into five mesons plus a neutrino with a realistic decay amplitude. This note describes a step into this direction. For the 2pi- pi+ 2pi0 mode the three decay chains tau- --> a_1- nu --> rho- (--> pi- pi0) omega (--> pi- pi+ pi0) nu, tau- --> a_1- nu --> a_1- (--> 2pi- pi+) f_0 (--> 2pi0) nu, and tau- --> a_1- nu --> a_1- (--> pi- 2pi0) f_0 (--> pi + pi-) nu are introduced with simple assumptions about the couplings and propagators of the various resonances. Similar amplitudes (without the rho omega contributions) are adopted for the pi- 4pi0 and 3pi- 2pi+ modes. The five-pion amplitude is thus based on a simple model, which, however, can be considered as a first realistic example. Phase-space generation includes the possibility of presampling the omega and a_1 resonances, in one channel only, however. This is probably sufficient for the time being, both for physics applications and for tests. The technical test of the new part of the generator is performed by comparing Monte Carlo and analytical results. To this end a non-realistic, but easy to calculate, purely scalar amplitude for the decay into five massless pions was used.

  11. Observation of the Semileptonic Decays B{yields}D*{tau}{sup -}{nu}{sub {tau}} and Evidence for B{yields}D{tau}{sup -}{nu}{sub {tau}}

    SciTech Connect

    Aubert, B.; Bona, M.; Boutigny, D.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prudent, X.; Tisserand, V.; Zghiche, A. [Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France); Tico, J. Garra; Grauges, E. [Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain); Lopez, L.; Palano, A.; Pappagallo, M. [Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy); Eigen, G.; Stugu, B.; Sun, L. [University of Bergen, Institute of Physics, N-5007 Bergen (Norway); Abrams, G. S.; Battaglia, M.; Brown, D. N. [Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)] (and others)

    2008-01-18

    We present measurements of the semileptonic decays B{sup -}{yields}D{sup 0}{tau}{sup -}{nu}{sub {tau}}, B{sup -}{yields}D*{sup 0}{tau}{sup -}{nu}{sub {tau}}, B{sup 0}{yields}D{sup +}{tau}{sup -}{nu}{sub {tau}}, and B{sup 0}{yields}D*{sup +}{tau}{sup -}{nu}{sub {tau}}, which are potentially sensitive to non-standard model amplitudes. The data sample comprises 232x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector. From a combined fit to B{sup -} and B{sup 0} channels, we obtain the branching fractions B(B{yields}D{tau}{sup -}{nu}{sub {tau}})=(0.86{+-}0.24{+-}0.11{+-}0.06)% and B(B{yields}D*{tau}{sup -}{nu}{sub {tau}})=(1.62{+-}0.31{+-}0.10{+-}0.05)% (normalized for the B{sup 0}), where the uncertainties are statistical, systematic, and normalization-mode-related.

  12. Study of Michel spectrum of tau decay

    E-print Network

    Ackerman, Nicole (Nicole L.)

    2007-01-01

    This thesis is the beginning of a larger project to use BaBar to examine weak couplings through leptonic [tau] decay. I will use the ratio of Br... and Br... and the Michel parameters [rho] and [eta]. which describe the ...

  13. V_us From Hadronic Tau Decays

    E-print Network

    K. Maltman; C. E. Wolfe

    2006-07-19

    We study extractions of |V_us| based on finite energy sum rule (FESR) analyses of hadronic tau decay data. We show (i) that the ``(0,0) spectral weight'' implementation (proposed previously in the literature as a favorable version of this analysis) suffers from significant convergence problems, but (ii) that alternate implementations exist which bring these problems under control. Results based on present spectral data are shown to be in agreement with those of other approaches, though with, at present, somewhat larger experimental errors. Sub-1% determinations of |V_us| are also shown to be expected from these alternate analyses once tau data from the B factories becomes available.

  14. TauDecay: a library to simulate polarized tau decays via FeynRules and MadGraph5

    E-print Network

    Kaoru Hagiwara; Tong Li; Kentarou Mawatari; Junya Nakamura

    2014-12-15

    TauDecay is a library of helicity amplitudes to simulate polarized tau decays, constructed in the FeynRules and MadGraph5 framework. Together with the leptonic mode, the decay library includes the main hadronic modes, \\tau \\to \

  15. First observation of the decay tau(-)-> K*(-)eta nu(tau)

    E-print Network

    Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, L.

    1999-01-01

    The decay tau(-) --> K*(-) eta nu(tau) has been observed with the CLEO II detector. The K*(-) is reconstructed in two decay channels, K*(-) -->, KSpi- --> pi(-)pi(+)pi(-) and K*(-) --> K- pi(0). The eta is reconstructed from the decay eta --> gamma...

  16. Measurement of the semileptonic decays B{yields}D{tau}{sup -}{nu}{sub {tau}} and B{yields}D*{tau}{sup -}{nu}{sub {tau}}

    SciTech Connect

    Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V. [Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France); Tico, J. Garra; Grauges, E. [Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain); Lopez, L.; Palano, A.; Pappagallo, M. [INFN Sezione di Bari, I-70126 Bari (Italy); Dipartmento di Fisica, Universita di Bari, I-70126 Bari (Italy); Eigen, G.; Stugu, B.; Sun, L. [University of Bergen, Institute of Physics, N-5007 Bergen (Norway); Abrams, G. S.; Battaglia, M.; Brown, D. N.; Jacobsen, R. G. [Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)] (and others)

    2009-05-01

    We present measurements of the semileptonic decays B{sup -}{yields}D{sup 0}{tau}{sup -}{nu}{sub {tau}}, B{sup -}{yields}D*{sup 0}{tau}{sup -}{nu}{sub {tau}}, B{sup 0}{yields}D{sup +}{tau}{sup -}{nu}{sub {tau}}, and B{sup 0}{yields}D*{sup +}{tau}{sup -}{nu}{sub {tau}}, which are sensitive to non-standard model amplitudes in certain scenarios. The data sample consists of 232x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector at the PEP-II e{sup +}e{sup -} collider. We select events with a D or D* meson and a light lepton (l=e or {mu}) recoiling against a fully reconstructed B meson. We perform a fit to the joint distribution of lepton momentum and missing mass squared to distinguish signal B{yields}D{sup (*)}{tau}{sup -}{nu}{sub {tau}}({tau}{sup -}{yields}l{sup -}{nu}{sub l}{nu}{sub {tau}}) events from the backgrounds, predominantly B{yields}D{sup (*)}l{sup -}{nu}{sub l}. We measure the branching-fraction ratios R(D){identical_to}B(B{yields}D{tau}{sup -}{nu}{sub {tau}})/B(B{yields}Dl{sup -}{nu}{sub l}) and R(D{sup *}){identical_to}B(B{yields}D*{tau}{sup -}{nu}{sub {tau}})/B(B{yields}D*l{sup -}{nu}{sub l}) and, from a combined fit to B{sup -} and B{sup 0} channels, obtain the results R(D)=(41.6{+-}11.7{+-}5.2)% and R(D*)=(29.7{+-}5.6{+-}1.8)%, where the uncertainties are statistical and systematic. Normalizing to measured B{sup -}{yields}D{sup (*)0}l{sup -}{nu}{sub l} branching fractions, we obtain B(B{yields}D{tau}{sup -}{nu}{sub {tau}})=(0.86{+-}0.24{+-}0.11{+-}0.06)% and B(B{yields}D*{tau}{sup -}{nu}{sub {tau}})=(1.62{+-}0.31{+-}0.10{+-}0.05)%, where the additional third uncertainty is from the normalization mode. We also present, for the first time, distributions of the lepton momentum, |p{sub l}{sup *}|, and the squared momentum transfer, q{sup 2}.

  17. A study of $\\\\tau$ decays involving $\\\\eta$ and $\\\\omega$ mesons

    Microsoft Academic Search

    I. De Bonis; D. Decamp; P. Ghez; C. Goy; J P Lees; A Lucotte; M N Minard; J Y Nief; P Odier; B Pietrzyk; M P Casado; M Chmeissani; J M Crespo; M C Delfino; I Efthymiopoulos; E Fernández; M Fernández-Bosman; L Carrido; A Juste; M Martínez; S Orteu; C Padilla; I C Park; A Pascual; J A Perlas; I Riu; F Sánchez; F Teubert; A Colaleo; D Creanza; M De Palma; G Gelao; M Girone; Giuseppe Iaselli; G Maggi; M Maggi; N Marinelli; S Nuzzo; A Ranieri; G Raso; F Ruggieri; G Selvaggi; L Silvestris; P Tempesta; A Tricomi; G Zito; X Huang; J Lin; Q Ouyang; T Wang; Y Xie; R Xu; S Xue; J Zhang; L Zhang; W Zhao; R Alemany; A O Bazarko; G Bonvicini; P G Bright-Thomas; M Cattaneo; P Comas; P Coyle; H Drevermann; Roger W Forty; M Frank; R Hagelberg; J Harvey; P Janot; B Jost; E Kneringer; J Knobloch; Ivan Lehraus; G Lutters; E B Martin; P Mato; Adolf G Minten; R Miquel; L M Mir; L Moneta; T Oest; A Pacheco; J F Pusztaszeri; F Ranjard; P E Rensing; G Rizzo; Luigi Rolandi; W D Schlatter; M Schmelling; M Schmitt; O Schneider; W Tejessy; I R Tomalin; A Venturi; H W Wachsmuth; A Wagner; Ziad J Ajaltouni; A Barrès; C Boyer; A Falvard; P Gay; C Guicheney; P Henrard; J Jousset; B Michel; S Monteil; J C Montret; D Pallin; P Perret; F Podlyski; J Proriol; P Rosnet; J M Rossignol; Tom Fearnley; J B Hansen; J D Hansen; P H Hansen; B S Nilsson; B Rensch; A Wäänänen; A Kyriakis; C Markou; Errietta Simopoulou; I Siotis; Anna Vayaki; K Zachariadou; A Blondel; G R Bonneaud; J C Brient; P Bourdon; A Rougé; M Rumpf; Andrea Valassi; M Verderi; H L Videau; D J Candlin; M I Parsons; E Focardi; G Parrini; M Corden; C H Georgiopoulos; D E Jaffe; A Antonelli; G Bencivenni; G Bologna; F Bossi; P Campana; G Capon; David William Casper; V Chiarella; G Felici; P Laurelli; G Mannocchi; F Murtas; G P Murtas; L Passalacqua; M Pepé-Altarelli; L Curtis; S J Dorris; A W Halley; I G Knowles; J G Lynch; V O'Shea; C Raine; P Reeves; J M Scarr; K Smith; P Teixeira-Dias; A S Thompson; F Thomson; S Thorn; R M Turnbull; U Becker; C Geweniger; G Graefe; P Hanke; G Hansper; V Hepp; E E Kluge; A Putzer; M Schmidt; J Sommer; K Tittel; S Werner; M Wunsch; D Abbaneo; R Beuselinck; David M Binnie; W Cameron; Peter J Dornan; A Moutoussi; J Nash; J K Sedgbeer; A M Stacey; M D Williams; G Dissertori; P Girtler; D Kuhn; G Rudolph; A P Betteridge; C K Bowdery; P Colrain; G Crawford; A J Finch; F Foster; G Hughes; Terence Sloan; M I Williams; A Galla; I Giehl; A M Greene; C Hoffmann; K Jakobs; K Kleinknecht; G Quast; B Renk; E Rohne; H G Sander; P Van Gemmeren; C Zeitnitz; Jean-Jacques Aubert; A M Bencheikh; C Benchouk; A Bonissent; G Bujosa; D Calvet; J Carr; C A Diaconu; F Etienne; N P Konstantinidis; P Payre; D Rousseau; M Talby; A Sadouki; M Thulasidas; K Trabelsi; M Aleppo; F Ragusa; C Bauer; R Berlich; Walter Blum; V Büscher; H Dietl; Friedrich Dydak; G Ganis; C Gotzhein; H Kroha; G Lütjens; Gerhard Lutz; W Männer; H G Moser; R H Richter; A Rosado-Schlosser; S Schael; Ronald Settles; H C J Seywerd; R Saint-Denis; H Stenzel; W Wiedenmann; G Wolf; J Boucrot; O Callot; Y Choi; A Cordier; M Davier; L Duflot; J F Grivaz; P Heusse; A Höcker; A Jacholkowska; M Jacquet; D W Kim; F R Le Diberder; J Lefrançois; A M Lutz; I A Nikolic; H J Park; M H Schune; S Simion; J J Veillet; I Videau; D Zerwas; P Azzurri; G Bagliesi; G Batignani; S Bettarini; C Bozzi; G Calderini; M Carpinelli; M A Ciocci; V Ciulli; R Dell'Orso; R Fantechi; I Ferrante; L Foà; F Forti; A Giassi; M A Giorgi; A Gregorio; F Ligabue; A Lusiani; P S Marrocchesi; A Messineo; Fabrizio Palla; G Sanguinetti; A Sciabà; P Spagnolo; Jack Steinberger; Roberto Tenchini; G Tonelli; C Vannini; P G Verdini; J Walsh; G A Blair; L M Bryant; F Cerutti; J T Chambers; Y Gao; M G Green; T Medcalf; P Perrodo; J A Strong; J H Von Wimmersperg-Töller; David R Botterill; R W Clifft; T R Edgecock; S Haywood; P Maley; P R Norton; J C Thompson; A E Wright; B Bloch-Devaux; P Colas; S Emery; Witold Kozanecki; E Lançon; M C Lemaire; E Locci; B Marx; P Pérez; J Rander; J F Renardy; A Roussarie; J P Schuller; J Schwindling; A Trabelsi; B Vallage; S N Black; J H Dann; R P Johnson; H Y Kim; A M Litke; M A McNeil; G Taylor; C N Booth; R Boswell; C A J Brew; S L Cartwright; F Combley; A Köksal; M H Lehto; W M Newton; J Reeve; L F Thompson; A Böhrer; S Brandt; G D Cowan; Claus Grupen; J A Minguet-Rodríguez; F Rivera; P Saraiva; L Smolik; F Stephan; M Apollonio; L Bosisio; R Della Marina; G Giannini; B Gobbo; G Musolino; J E Rothberg; S R Wasserbaech; S R Armstrong; P Elmer; Z Feng; D P S Ferguson; S González; J Grahl; T C Greening; O J Hayes; H Hu; P A McNamara; J M Nachtman; W Orejudos; Y B Pan; Y Saadi; I J Scott; A M Walsh; X Wu; J M Yamartino; M Zheng; G Zobernig

    1997-01-01

    The 132 pb$^{-1}$ of data collected by ALEPH from 1991 to 1994 have been used to analyze $\\\\eta$ and $\\\\omega$ production in $\\\\tau$ decays. The following branching fractions have been measured: \\\\begin{eqnarray*} B(\\\\tau^-\\\\to\\\

  18. Measurement of the Semileptonic Decays B->D tau nu and B->D* tau nu

    SciTech Connect

    Aubert, : B.

    2009-02-23

    The authors present measurements of the semileptonic decays B{sup -} {yields} D{sup 0} {tau}{sup -} {bar {nu}}{sub {tau}}, B{sup -} {yields} D*{sup 0} {tau}{sup -}{bar {nu}}{sub {tau}}, {bar B}{sup 0} {yields} D{sup +} {tau}{sup -} {bar {nu}}{sub {tau}}, and {bar B}{sup 0} {yields} D*{sup +} {tau}{sup -}{bar {nu}}{sub {tau}}, which are sensitive to non-Standard Model amplitudes in certain scenarios. The data sample consists of 232 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II e{sup +}e{sup -} collider. They select events with a D or D* meson and a light lepton ({ell} = e or {mu}) recoiling against a fully reconstructed B meson. They perform a fit to the joint distribution of lepton momentum and missing mass squared to distinguish signal B {yields} D{sup (*)}{tau}{sup -} {bar {nu}}{sub {tau}} ({tau}{sup -} {yields} {ell}{sup -} {bar {nu}}{sub {ell}}{nu}{sub {tau}}) events from the backgrounds, predominantly B {yields} D{sup (*)} {ell}{sup -}{bar {nu}}{sub {ell}}. They measure the branching-fraction ratios R(D) {triple_bond} {Beta}(B {yields} D{tau}{sup -} {bar {nu}}{sub {tau}})/{Beta}(B {yields} D{ell}{sup -} {bar {nu}}{sub {ell}}) and R(D*) {triple_bond} {Beta}(B {yields} D*{tau}{sup -} {bar {nu}}{sub {tau}})/{Beta}(B {yields} D* {ell}{sup -} {bar {nu}}{sub {ell}}) and, from a combined fit to B{sup -} and {bar B}{sup 0} channels, obtain the results R(D) = (41.6 {+-} 11.7 {+-} 5.2)% and R(D*) = (29.7 {+-} 5.6 {+-} 1.8)%, where the uncertainties are statistical and systematic. Normalizing to measured B{sup -} {yields} D{sup (*)0} {ell}{sup -} {bar {nu}}{sub {ell}} branching fractions, they obtain {Beta}(B {yields} D{tau}{sup -} {bar {nu}}{sub {tau}}) = (0.86 {+-} 0.24 {+-} 0.11 {+-} 0.06)% and {Beta}(B {yields} D*{tau}{sup -} {bar {nu}}{sub {tau}}) = (1.62 {+-} 0.31 {+-} 0.10 {+-} 0.05)%, where the additional third uncertainty is from the normalization mode. They also present, for the first time, distributions of the lepton momentum, |P*{sub {ell}}|, and the squared momentum transfer, q{sup 2}.

  19. B Meson Decays With Tau Leptons in the Final State

    SciTech Connect

    Mazur, Michael; /Freiburg U.

    2009-08-05

    We present measurements of B meson decays with {tau} leptons in the final state. These decays, while experimentally more challenging than those involving light leptons, provide enhanced sensitivity to physics beyond the Standard Model due to the large {tau} mass. We present measurements of the branching fractions of B{sup -} {yields} {tau}{sup -} {bar {nu}}{sub {tau}} and B {yields} D{sup (*)}{tau}{sup -}{bar {nu}}{sub {tau}}, as well as searches for the forbidden decays B{sup 0} {yields} {ell}{sup {+-}}{tau}{sup {-+}} and B{sup -} {yields} K{sup -} {tau}{sup {+-}}{mu}{sup {-+}}. These measurements are based on several hundred million e{sup +}e{sup -} {yields} {Upsilon}(4S) {yields} B{bar B} events recorded with the BaBar detector at the PEP-II asymmetric-energy collider.

  20. Tau Decays into Three Charged Leptons and Two Neutrinos

    Microsoft Academic Search

    M. S. Alam; I. J. Kim; Z. Ling; A. H. Mahmood; J. J. O'Neill; H. Severini; C. R. Sun; S. Timm; F. Wappler; J. E. Duboscq; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; M. Sung; C. White; R. Wanke; A. Wolf; M. M. Zoeller; X. Fu; B. Nemati; S. J. Richichi; W. R. Ross; P. Skubic; M. Wood; M. Bishai; J. Fast; E. Gerndt; J. W. Hinson; T. Miao; D. H. Miller; M. Modesitt; E. I. Shibata; I. P. Shipsey; P. N. Wang; L. Gibbons; S. D. Johnson; Y. Kwon; S. Roberts; E. H. Thorndike; C. P. Jessop; K. Lingel; H. Marsiske; M. L. Perl; S. F. Schaffner; R. Wang; T. E. Coan; J. Dominick; V. Fadeyev; I. Korolkov; M. Lambrecht; S. Sanghera; V. Shelkov; R. Stroynowski; I. Volobouev; G. Wei; M. Artuso; A. Efimov; M. Gao; M. Goldberg; D. He; N. Horwitz; S. Kopp; G. C. Moneti; Y. Mukhin; S. Playfer; T. Skwarnicki; S. Stone; X. Xing; J. Bartelt; S. E. Csorna; V. Jain; S. Marka; D. Gibaut; K. Kinoshita; P. Pomianowski; S. Schrenk; B. Barish; M. Chadha; S. Chan; G. Eigen; J. S. Miller; C. O'Grady; M. Schmidtler; J. Urheim; A. J. Weinstein; F. Würthwein; D. M. Asner; M. Athanas; D. W. Bliss; W. S. Brower; G. Masek; H. P. Paar; J. Gronberg; C. M. Korte; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. Roberts; A. Ryd; H. Tajima; M. S. Witherell; R. Balest; K. Cho; W. T. Ford; M. Lohner; P. Rankin; J. Roy; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; M. Dickson; P. S. Drell; D. J. Dumas; R. Ehrlich; R. Elia; P. Gaidarev; R. S. Galik; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; T. Lee; Y. Liu; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; A. Soffer; C. Ward; P. Avery; A. Freyberger; C. Prescott; S. Yang; J. Yelton; G. Brandenburg; R. A. Briere; D. Cinabro; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. E. Browder; F. Li; J. L. Rodriguez; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; K. W. McLean; M. Ogg; A. Bellerive; D. I. Britton; R. Janicek; D. B. Macfarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; S. Kotov; I. Kravchenko; N. Kwak; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; R. Poling; T. Riehle; V. Savinov

    1996-01-01

    We search for the radiative leptonic tau decays tau-->ee+e-nutaunue and tau-->mue+e-nutaunumu using 3.60 fb-1 of data collected by the CLEO-II experiment at the Cornell Electron Storage Ring. We present a first observation of the tau-->ee+e-nutaunue process. For this channel we measure the branching fraction B\\\\(tau-->ee+e-nutaunue\\\\) = \\\\(2.7+1.5+0.4+0.1-1.1-0.4-0.3\\\\)×10-5. An upper limit is established for the second channel: B\\\\(tau-->mue+e-nutaunumu\\\\)<3.2×10-5 at 90% C.L.

  1. Precise predictions for B -> Xc tau nu decay distributions

    E-print Network

    Zoltan Ligeti; Frank J. Tackmann

    2014-09-01

    We derive precise standard model predictions for the dilepton invariant mass and the tau energy distributions in inclusive B -> Xc tau nu decay. We include Lambda_QCD^2/m_b^2 and alpha_s corrections using the 1S short-distance mass scheme, and estimate shape function effects near maximal tau energy. These results can improve the sensitivity of b -> c tau nu related observables to beyond standard model physics.

  2. One-prong tau decays into charged kaons

    Microsoft Academic Search

    Damir Buskulic; David William Casper; I. de Bonis; D. Decamp; P. Ghez; C. Goy; J.-P. Lees; M.-N. Minard; P. Odier; B. Pietrzyk; F. Ariztizabal; M. Chmeissani; J. M. Crespo; I. Efthymiopoulos; E. Fernandez; M. Fernandez-Bosman; V. Gaitan; Ll. Garrido; M. Martinez; T S Mattison; S. Ortue; A. Pacheco; C. Padilla; A. Pascual; F. Teubert; D. Creanza; M. de Palma; A. Farilla; Giuseppe Iaselli; G. Maggi; N. Marinelli; S. Natali; S. Nuzzo; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Chai; D. Huang; X. Huang; J. Lin; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; L. Zhang; W. Zhao; E. Blucher; G. Bonvicini; J. Boudreau; P. Comas; P. Coyle; H. Drevermann; R. W. Forty; G. Ganis; C. Gay; M. Girone; R. Hagelberg; J. Harvey; R. Jacobsen; B. Jost; J. Knobloch; I. Lehraus; M. Maggi; C. Markou; P. Mato; H. Meinhard; A. Minten; R. Miquel; P. Palazzi; J A Perlas; P. Perrodo; J.-F. Pusztaszeri; F. Ranjard; L. Rolandi; J. Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; F. Sefkow; W. Tejessy; I. R. Tomalin; R. Veenhof; H. Wachsmuth; S. Wasserbaech; W. Widenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Barres; C. Boyer; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; F. Podlyski; J. Proriol; F. Saadi; T. Fearnley; J. B. Hansen; J. D. Hansen; P. H. Hansen; S. D. Johnson; R. Møllerud; B. S. Nilsson; A. Kyriakis; E. Simopoulou; I. Siotis; A. Vayaki; K. Zachariadou; J. Badier; A. Blondel; G. Bonneaud; J. C. Brient; P. Bourdon; G. Fouque; L. Passalacqua; A. Rougé; M. Rumpf; R. Tanaka; M. Verderi; H. Videau; D. J. Candlin; M. I. Parsons; E. Veitch; E. Focardi; L. Moneta; G. Parrini; M. Corden; M. Delfino; C. Georgiopoulos; D. E. Jaffe; D. Levinthal; A. Antonelli; G. Bencivenni; G. Bologna; F. Bossi; P. Campana; G. Capon; F. Cerutti; V. Chiarella; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; M. Pepe-Altarelli; S. Salomone; P. Colrain; I. Ten Have; I. G. Knowles; J. G. Lynch; W. Maitland; W. T. Morton; C. Raine; P. Reeves; J. M. Scarr; K. Smith; M. G. Smith; A. S. Thompson; S. Thorn; R. M. Turnbull; U. Becker; O. Braun; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; A. Putzer; B. Rensch; M. Schmidt; H. Stenzel; K. Tittel; M. Wunsch; R. Beuselinck; D. M. Binnie; W. Cameron; M. Cattaneo; D. J. Colling; P. J. Dornan; J. F. Hassard; N. Konstantinidis; A. Moutoussi; J. Nash; D. G. Payne; G. San Martin; J. K. Sedgbeer; A. G. Wright; P. Girtler; D. Kuhn; G. Rudolph; R. Vogl; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Keemer; M. Nuttall; A. Patel; T. Sloan; S. W. Snow; E. P. Whelan; A M Greene; A. M. Greene; K. Kleinknecht; J. Raab; B. Renk; H.-G. Sander; H. Schmidt; S. M. Walther; R. Wanke; B. Wolf; A. M. Bencheikh; C. Benchouk; A. Bonissent; D. Calvet; J. Carr; C. Diaconu; F. Etienne; D. Nicod; P. Payre; L. Roos; D. Rousseau; P. Schwemling; M. Talby; S. Adlung; R. Assmann; C. Bauer; W. Blum; D. Brown; P. Cattaneo; B. Dehning; H. Dietl; F. Dydak; M. Frank; A. W. Halley; K. Jakobs; H. Kroha; J. Lauber; G. Lütjens; G. Lutz; W. Männer; H.-G. Moser; R. Richter; J. Schröder; A. S. Schwarz; R. Settles; H. Seywerd; U. Stierlin; U. Stiegler; R. St. Denis; G. Wolf; R. Alemany; J. Boucrot; O. Callot; A. Cordier; M. Davier; L. Duflot; J.-F. Grivaz; Ph. Heusse; P. Janot; D. W. Kim; F. Le Diberder; J. Lefrançois; A.-M. Lutz; G. Musolino; H.-J. Park; M.-H. Schune; J.-J. Veillet; I. Videau; D. Abbaneo; G Batignani; G. Batignani; U. Bottigli; C. Bozzi; G. Calderini; M. Carpinelli; M. A. Ciocci; V. Ciulli; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; F. Forti; A. Giassi; M. A. Giorgi; A. Gregorio; F. Ligabue; A. Lusiani; P. S. Marrocchesi; E. B. Martin; A. Messineo; F. Palla; G. Rizzo; G. Sanguinetti; P. Spagnolo; J. Steinberger; R. Tenchini; G Triggiani; A. Valassi; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; A. P. Betteridge; Y. S. Gao; M. G. Green; D. L. Johnson; P. V. March; T. Medcalf; Ll. M. Mir; I. S. Quasi; J. A. Strong; V. Bertin; D. R. Botterill; R. W. Clifft; T. R. Edgecock; S. Haywood; M. Edwards; P. R. Norton; J. C. Thompson; B. Bloch-Devaux; P. Colas; H. Duarte; S. Emery; W. Kozanecki; E. Lançon; M. C. Lemaire; E. Locci; B. Marx; P. Perez; J F Renardy; A Roussarie; A. Roussarie; J Schwindling; D. Si Mohand; B. Vallage; R. P. Johnson; A. M. Litke; G. Taylor; J. Wear; A. Beddall; C. N. Booth; S. Cartwright; F. Combley; I. Dawson; A. Koksal; C. Rankin; L. F. Thompson; A. Böhrer; S. Brandt; G. Cowan; E. Feigl; C. Grupen; G. Lutters; J. Minguet-Rodriguez; F. Rivera; P. Saraiva; U. Schäfer; L. Smolik; L. Bosisio; R. della Marina; G. Giannini; B. Gobbo; L. Pitis; F. Ragusa; L. Bellantoni; W. Chen; J. S. Conway; Z. Feng; D. P. S. Ferguson; J. Grahl; J. L. Harton; O. J. Hayes; H. Hu; J. M. Nachtman

    1994-01-01

    Form a sample of about 75000 tau decays measured in the ALEPH detector, 1-prong charged kaon decays are identified by the dE\\/dx measurement in the central detector. The resulting branching ratios for the inclusive and exclusive modes are: B(tau --> nutauK- >= 0pi0 >= 0K0) = (1.60+\\/-0.07+\\/-0.12)%, B(tau --> nutauK- = (0.64+\\/-0.05+\\/-0.05)%, B(tau --> nutau-pi0 = (0.53+\\/-0.05+\\/-0.07)% and B(tau -->

  3. CLNS 94/1303 October 1994 * Hadronic Decay Modes of the Tau Lepton: A TAU94 Review *

    E-print Network

    Hadronic Decay Modes of the Tau Lepton: A TAU94 Review * Brian K. Heltsley Laboratory of Nuclear Studies of the tau lepton. Ne* *w and more precise branching fraction measurements dominate the discussion has forced the definit* *ion of these The tau lepton provides a window on the weakmodes to retain

  4. Measurement of the Semileptonic Decays B --> D tau nubar and B --> D* tau nubar

    E-print Network

    The BABAR Collaboration; B. Aubert

    2007-07-18

    We present preliminary measurements of branching fractions for the semileptonic decays B --> D tau nubar and B --> D* tau nubar, which are potentially sensitive to non--Standard Model amplitudes. The data sample comprises 232x10^6 Upsilon(4S) --> BBbar decays collected with the BaBar detector at the PEP-II e+e- storage ring. We obtain B(B- --> D0 tau nubar) = (0.63 +/- 0.38 +/- 0.10 +/- 0.06)%, B(B- --> D*0 tau nubar) = (2.35 +/- 0.49 +/- 0.22 +/- 0.18)%, B(B0bar --> D+ tau nubar) = (1.03 +/- 0.35 +/- 0.14 +/- 0.10)%, and B(B0bar --> D*+ tau nubar) = (1.15 +/- 0.33 +/- 0.04 +/- 0.04)%, where the uncertainties are statistical, systematic, and normalization, respectively. By combining B- and B0bar results, we also obtain the branching fractions B(B --> D tau nubar) = (0.90 +/- 0.26 +/- 0.11 +/- 0.06)% and B(B --> D* tau nubar) = (1.81 +/- 0.33 +/- 0.11 +/- 0.06)% (quoted for the B- lifetime), with significances of 3.5 sigma and 6.2 sigma.

  5. A Search for the Decay B+ to tau+ nu_tau

    SciTech Connect

    Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Tisserand, V.; Zghiche, A.; /Annecy, LAPP; Grauges, E.; /Barcelona, IFAE; Palano, A.; Pappagallo, M.; Pompili, A.; /Bari U. /INFN, Bari; Chen, J.C.; Qi, N.D.; Rong, G.; Wang, P.; Zhu, Y.S.; /Beijing, Inst. High Energy Phys.; Eigen, G.; Ofte, I.; Stugu, B. /Bergen U. /LBL, Berkeley /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /Bristol U. /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San

    2005-07-27

    We search for the rare leptonic decay B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} in a sample of 232 x 10{sup 6} B{bar B} pairs collected with the BABAR detector at the SLAC PEP-II B-Factory. Signal events are selected by examining the properties of the B meson recoiling against the semileptonic decay B{sup -} {yields} D*{sup 0}{ell}{bar {nu}}{sub {ell}}. We find no evidence for a signal and set an upper limit on the branching fraction of {Beta}(B{sup +} {yields} {tau}{sup +} {nu}{sub {tau}}) < 2.8 x 10{sup -4} at the 90% confidence level. We combine this result with a previous, statistically independent BABAR search for B{sup +} {yields} {tau}{sup +} {nu}{sub {tau}} to give an upper limit of {Beta}(B{sup +} {yields} {tau}{sup +} {nu}{sub {tau}}) < 2.6 10{sup -4} at the 90% confidence level.

  6. First Observation of the Decay tau---> K-etanutau

    Microsoft Academic Search

    J. Bartelt; S. E. Csorna; V. Jain; S. Marka; A. Freyberger; D. Gibaut; K. Kinoshita; P. Pomianowski; S. Schrenk; D. Cinabro; B. Barish; M. Chadha; S. Chan; G. Eigen; J. S. Miller; C. O'Grady; M. Schmidtler; J. Urheim; A. J. Weinstein; F. Würthwein; D. M. Asner; M. Athanas; D. W. Bliss; W. S. Brower; G. Masek; H. P. Paar; J. Gronberg; C. M. Korte; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. Roberts; A. Ryd; H. Tajima; M. S. Witherell; R. Balest; K. Cho; W. T. Ford; M. Lohner; P. Rankin; J. Roy; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; M. Dickson; P. S. Drell; D. J. Dumas; R. Ehrlich; R. Elia; P. Gaidarev; R. S. Galik; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; T. Lee; Y. Liu; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; A. Soffer; C. Ward; P. Avery; C. Prescott; S. Yang; J. Yelton; G. Brandenburg; R. A. Briere; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. E. Browder; F. Li; J. L. Rodriguez; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; K. W. McLean; M. Ogg; A. Bellerive; D. I. Britton; R. Janicek; D. B. Macfarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; S. Kotov; I. Kravchenko; N. Kwak; S. Anderson; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; R. Poling; T. Riehle; V. Savinov; M. S. Alam; I. J. Kim; Z. Ling; A. H. Mahmood; J. J. O'Neill; H. Severini; C. R. Sun; S. Timm; F. Wappler; J. E. Duboscq; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; M. Sung; A. Undrus; C. White; R. Wanke; A. Wolf; M. M. Zoeller; X. Fu; B. Nemati; S. J. Richichi; W. R. Ross; P. Skubic; M. Wood; M. Bishai; J. Fast; E. Gerndt; J. W. Hinson; T. Miao; D. H. Miller; M. Modesitt; E. I. Shibata; I. P. Shipsey; P. N. Wang; M. Yurko; L. Gibbons; S. D. Johnson; Y. Kwon; S. Roberts; E. H. Thorndike; C. P. Jessop; K. Lingel; H. Marsiske; M. L. Perl; S. F. Schaffner; R. Wang; T. E. Coan; J. Dominick; V. Fadeyev; I. Korolkov; M. Lambrecht; S. Sanghera; V. Shelkov; R. Stroynowski; I. Volobouev; G. Wei; M. Artuso; A. Efimov; M. Gao; M. Goldberg; R. Greene; D. He; N. Horwitz; S. Kopp; G. C. Moneti; Y. Mukhin; S. Playfer; T. Skwarnicki; S. Stone; X. Xing

    1996-01-01

    The decay tau--->K-etanutau has been observed with the CLEO II detector. The eta meson is reconstructed using two decay channels, eta-->gammagamma and pi+pi-pi0. The measured branching fraction is B\\\\(tau--->K-etanutau\\\\) = \\\\(2.6+\\/-0.5+\\/-0.4\\\\)×10-4, somewhat higher than theoretical estimates. An improved upper limit for the second-class-current decay tau--->pi-etanutau is set, B\\\\(tau--->pi-etanutau\\\\)<1.4×10-4 at 95% C.L., consistent with theoretical expectations.

  7. Astrophysical tau neutrino detection in kilometer-scale Cherenkov detectors via muonic tau decay

    E-print Network

    T. DeYoung; S. Razzaque; D. F. Cowen

    2006-08-23

    Kilometer-scale deep under-ice or -water Cherenkov neutrino detectors may detect muon and electron neutrinos from astrophysical sources at energies of a TeV and above. Tau neutrinos are also expected from these sources due to neutrino flavor oscillations in vacuum, and tau neutrinos are free of atmospheric background at a much lower energy than muon and electron neutrinos. Identification of tau neutrinos is expected to be possible above the PeV energy range through the "double bang" and "lollipop" signatures. We discuss another signature of tau in the PeV-EeV range, arising from the decay of tau leptons inside the detector to much brighter muons.

  8. Search for the rare leptonic decay B--->tau-nutau.

    PubMed

    Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, J-M; Hicheur, A; Karyotakis, Y; Lees, J P; Tisserand, V; Zghiche, A; Palano, A; Pompili, A; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S; Eigen, G; Ofte, I; Stugu, B; Abrams, G S; Borgland, A W; Breon, A B; Brown, D N; Button-Shafer, J; Cahn, R N; Charles, E; Day, C T; Gill, M S; Gritsan, A V; Groysman, Y; Jacobsen, R G; Kadel, R W; Kadyk, J; Kerth, L T; Kolomensky, Yu G; Kukartsev, G; Lynch, G; Mir, L M; Oddone, P J; Orimoto, T J; Pripstein, M; Roe, N A; Ronan, M T; Shelkov, V G; Wenzel, W A; Barrett, M; Ford, K E; Harrison, T J; Hart, A J; Hawkes, C M; Morgan, S E; Watson, A T; Fritsch, M; Goetzen, K; Held, T; Koch, H; Lewandowski, B; Pelizaeus, M; Steinke, M; Boyd, J T; Chevalier, N; Cottingham, W N; Kelly, M P; Latham, T E; Wilson, F F; Cuhadar-Donszelmann, T; Hearty, C; Knecht, N S; Mattison, T S; McKenna, J A; Thiessen, D; Khan, A; Kyberd, P; Teodorescu, L; Blinov, A E; Blinov, V E; Druzhinin, V P; Golubev, V B; Ivanchenko, V N; Kravchenko, E A; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Solodov, E P; Yushkov, A N; Best, D; Bruinsma, M; Chao, M; Eschrich, I; Kirkby, D; Lankford, A J; Mandelkern, M; Mommsen, R K; Roethel, W; Stoker, D P; Buchanan, C; Hartfiel, B L; Foulkes, S D; Gary, J W; Shen, B C; Wang, K; Del Re, D; Hadavand, H K; Hill, E J; Macfarlane, D B; Paar, H P; Rahatlou, Sh; Sharma, V; Berryhill, J W; Campagnari, C; Dahmes, B; Levy, S L; Long, O; Lu, A; Mazur, M A; Richman, J D; Verkerke, W; Beck, T W; Eisner, A M; Heusch, C A; Lockman, W S; Nesom, G; Schalk, T; Schmitz, R E; Schumm, B A; Seiden, A; Spradlin, P; Williams, D C; Wilson, M G; Albert, J; Chen, E; Dubois-Felsmann, G P; Dvoretskii, A; Hitlin, D G; Narsky, I; Piatenko, T; Porter, F C; Ryd, A; Samuel, A; Yang, S; Jayatilleke, S; Mancinelli, G; Meadows, B T; Sokoloff, M D; Abe, T; Blanc, F; Bloom, P; Chen, S; Ford, W T; Nauenberg, U; Olivas, A; Rankin, P; Smith, J G; Zhang, J; Zhang, L; Chen, A; Harton, J L; Soffer, A; Toki, W H; Wilson, R J; Zeng, Q L; Altenburg, D; Brandt, T; Brose, J; Dickopp, M; Feltresi, E; Hauke, A; Lacker, H M; Müller-Pfefferkorn, R; Nogowski, R; Otto, S; Petzold, A; Schubert, J; Schubert, K R; Schwierz, R; Spaan, B; Sundermann, J E; Bernard, D; Bonneaud, G R; Brochard, F; Grenier, P; Schrenk, S; Thiebaux, Ch; Vasileiadis, G; Verderi, M; Bard, D J; Clark, P J; Lavin, D; Muheim, F; Playfer, S; Xie, Y; Andreotti, M; Azzolini, V; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Luppi, E; Negrini, M; Piemontese, L; Sarti, A; Treadwell, E; Baldini-Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Patteri, P; Piccolo, M; Zallo, A; Buzzo, A; Capra, R; Contri, R; Crosetti, G; Lo Vetere, M; Macri, M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Bailey, S; Brandenburg, G; Morii, M; Won, E; Dubitzky, R S; Langenegger, U; Bhimji, W; Bowerman, D A; Dauncey, P D; Egede, U; Gaillard, J R; Morton, G W; Nash, J A; Nikolich, M B; Taylor, G P; Charles, M J; Grenier, G J; Mallik, U; Cochran, J; Crawley, H B; Lamsa, J; Meyer, W T; Prell, S; Rosenberg, E I; Yi, J; Davier, M; Grosdidier, G; Höcker, A; Laplace, S; Le Diberder, F; Lepeltier, V; Lutz, A M; Petersen, T C; Plaszczynski, S; Schune, M H; Tantot, L; Wormser, G; Cheng, C H; Lange, D J; Simani, M C; Wright, D M; Bevan, A J; Chavez, C A; Coleman, J P; Forster, I J; Fry, J R; Gabathuler, E; Gamet, R; Parry, R J; Payne, D J; Sloane, R J; Touramanis, C; Back, J J; Cormack, C M; Harrison, P F; Di Lodovico, F; Mohanty, G B; Brown, C L; Cowan, G; Flack, R L; Flaecher, H U; Green, M G; Jackson, P S; McMahon, T R; Ricciardi, S; Salvatore, F; Winter, M A; Brown, D; Davis, C L; Allison, J; Barlow, N R; Barlow, R J; Hodgkinson, M C; Lafferty, G D; Lyon, A J; Williams, J C; Farbin, A; Hulsbergen, W D; Jawahery, A; Kovalskyi, D; Lae, C K; Lillard, V; Roberts, D A; Blaylock, G; Dallapiccola, C; Flood, K T; Hertzbach, S S; Kofler, R; Koptchev, V B; Moore, T B; Saremi, S; Staengle, H; Willocq, S; Cowan, R; Sciolla, G; Taylor, F; Yamamoto, R K; Mangeol, D J J; Patel, P M; Robertson, S H; Lazzaro, A; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Godang, R; Kroeger, R; Reidy, J; Sanders, D A; Summers, D J; Zhao, H W; Brunet, S; Côté, D; Taras, P; Nicholson, H; Fabozzi, F; Gatto, C; Lista, L; Monorchio, D; Paolucci, P; Piccolo, D; Sciacca, C; Baak, M; Bulten, H; Raven, G; Snoek, H L; Wilden, L; Jessop, C P; Losecco, J M; Gabriel, T A; Allmendinger, T; Brau, B; Gan, K K; Honscheid, K; Hufnagel, D; Kagan, H; Kass, R; Pulliam, T; Rahimi, A M; Ter-Antonyan, R; Wong, Q K; Brau, J; Frey, R; Igonkina, O; Potter, C T; Sinev, N B; Strom, D; Torrence, E; Colecchia, F; Dorigo, A; Galeazzi, F; Margoni, M; Morandin, M; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Tiozzo, G; Voci, C; Benayoun, M; Briand, H; Chauveau, J; David, P; de la Vaissière, Ch; Del Buono, L

    2005-07-22

    We present a search for the decay B(-)--> tau(-)nu(tau) in a sample of 88.9 x 10(6) BB pairs recorded with the BABAR detector at the Stanford Linear Accelerator Center B factory. One of the two B mesons from the Gamma(4S) is reconstructed in a hadronic or a semileptonic final state, and the decay products of the other B in the event are analyzed for consistency with a B(-) --> tau(-)nu(tau) decay. We find no evidence of a signal and set an upper limit on the branching fraction of B(B(-) --> tau(-) nu(tau)) < 4.2 x 10(-4) at the 90% confidence level. PMID:16090798

  9. Spectral distribution for the decay tau -> nu_tau K pi

    E-print Network

    M. Jamin; A. Pich; J. Portoles

    2006-05-09

    With the newly available data sets on hadronic tau decays from the B-factories BABAR and BELLE, and future data from BESIII, precise information on the decay distributions will soon become available. This calls for an improvement of the decay spectra also on the theoretical side. In this work, the distribution function for the decay tau -> nu_tau K pi will be presented with the relevant K pi vector and scalar form factors being calculated in the framework of the resonance chiral theory, also taking into account additional constraints from dispersion relations and short-distances. As a by-product the slope and curvature of the vector form factor F_+^{K pi}(s) are determined to be lambda_+^' = 25.6 10^{-3} and lambda_+^{''} = 1.31 10^{-3} respectively. From our approach it appears that it should be possible to obtain information on the low lying scalar K_0^*(800) as well as the second vector K^*(1410) resonances from the tau decay data. In particular, the exclusive branching fraction of the scalar component is found to be B[tau -> nu_tau(K pi)_{S-wave}] = (3.88 +- 0.19) 10^{-4}.

  10. A Search for Neutrinoless Tau Decays to Three Leptons

    SciTech Connect

    Kolb, Jeffrey A.; /Oregon U. /SLAC; ,

    2008-09-24

    Using approximately 350 million {tau}{sup +}{tau}{sup -} pair events recorded with the BaBar detector at the Stanford Linear Accelerator Center between 1999 and 2006, a search has been made for neutrinoless, lepton-flavor violating tau decays to three lighter leptons. All six decay modes consistent with conservation of electric charge and energy have been considered. With signal selection efficiencies of 5-12%, we obtain 90% confidence level upper limits on the branching fraction {Beta}({tau} {yields} {ell}{ell}{ell}) in the range (4-8) x 10{sup -8}.

  11. Search for new physics in B{yields}D*{tau}nu-bar {sub {tau}} decay

    SciTech Connect

    Fajfer, Svjetlana; Kamenik, Jernej F.; Nisandzic, Ivan [Stefan Institute, Jamova 39, P. O. Box 3000, 1001 Ljubljana (Slovenia) and Department of Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana (Slovenia); J. Stefan Institute, Jamova 39, P. O. Box 3000, 1001 Ljubljana (Slovenia)

    2012-10-23

    B physics offers important tests of the Standard Model at low energies. Recently, BaBar observed significant deviations from the Standard Model expectations in the semileptonic B{yields}D{sup (*)}{tau}{nu}{sub {tau}} decays. Interestingly, the measured leptonic B{yields}{tau}{nu} branching fraction also deviates from CKM unitarity predictions. Motivated by these results we investigate the most general set of lowest dimensional effective operators leading to modifications of b{yields}c(u) (semi)tauonic transitions. Allowing for general flavor violation, we find that among possible operator structures, new contributions from right-right vector and right-left scalar quark currents provide viable explanations of the anomalies. In addition, we identify a number of B{yields}D*{tau}{nu}{sub {tau}} transition observables with the power to discriminate among the various effective operators' contributions. They are the differential decay rate, longitudinal D* polarization fraction, D*-{tau} opening angle asymmetry and the {tau} helicity asymmetry.

  12. Observation of tau-lepton decay to five charged particles

    SciTech Connect

    Beltrami, I.; Bylsma, B.G.; DeBonte, R.; Gan, K.K.; Koltick, D.; Loeffler, F.J.; Low, E.H.; McIlwain, R.L.; Miller, D.H.; Ng, C.R.; Ong, P.P.; Rangan, L.K.; Shibata, E.I.; Wilson, R.J.; Derrick, M.; Fernandez, E.; Fries, R.; Hyman, L.; Kooijman, P.; Loos, J.S.; Musgrave, B.; Price, L.E.; Schlereth, J.; Sugano, K.; Weiss, J.M.; Wood, D.E.; Baranko, G.; Baringer, P.; Blockus, D.; Brabson, B.; Forden, G.E.; Gray, S.W.; Jung, C.; Neal, H.; Ogren, H.; Rust, D.R.; Valdata-Nappi, M.; Akerlof, C.; Bonvicini, G.; Chapman, J.; Errede, D.; Harnew, N.; Kesten, P.; Kooijman, S.; Meyer, D.I.; Nitz, D.; Rubin, D.; Seidl, A.A.; Thun, R.; Trinko, T.; Willutzky, W.; Cork, B.; Keller, L.; Va'Vra, J.

    1985-04-22

    The production of tau-lepton pairs in e/sup +/e/sup -/ collisions at 29 GeV has been used to study the inclusive tau decay into five charged particles. Ten events are observed in the high-resolution spectrometer giving a branching ratio of B(tau..-->..5..pi../sup + -/+n..gamma..+..nu../sub tau/) = (1.3 +- 0 .4) x 10/sup -3/. Five of the events contain photons which are consistent with coming from a single ..pi../sup 0/. With this interpretation we measure B(tau..-->..5..pi.. +- +..nu../sub tau/), B(tau..-->..5..pi../sup + -/+..pi../sup 0/+..nu../sub tau/) = (6.7 +- 3.0) x 10/sup -4/. The branching-ratio upper limit for the decay mode tau..-->..K/sup 0/+3..pi../sup + -/n..gamma..+..nu../sub tau/ is found, at 90% confidence level, to be 2.7 x 10/sup -3/.

  13. Measurement of the Semileptonic Anti-B to D(*) Tau Anti-Nu/Tau Decays at BaBar

    SciTech Connect

    Lopes Pegna, David; /Princeton U.

    2011-11-11

    Semileptonic B meson decays into final states containing the {tau} lepton are of interesting as they provide information on the Standard Model as well as a window on new physics effects. We present results on {bar B} {yields} D{sup (*)} {tau}{bar {nu}}{sub {tau}} decays where the second B in the event is fully reconstructed.

  14. Multiple-neutral-meson decays of the /tau/ lepton and electromagnetic calorimeter requirements at Tau-Charm Factory

    SciTech Connect

    Gan, K.K.

    1989-08-01

    This is a study of the physics sensitivity to the multiple-neutral-meson decays of the /tau/ lepton at the Tau-Charm Factory. The sensitivity is compared for a moderate and an ultimate electromagnetic calorimeter. With the high luminosity of the Tau- Charm Factory, a very large sample of the decays /tau//sup /minus// /yields/ /pi//sup /minus//2/pi//sup 0//nu//sub /tau// and /tau//sup /minus// /yields/ /pi//sup /minus//3/pi//sup 0//nu//sub /tau// can be collected with both detectors. However, with the ultimate detector, 2/pi//sup 0/ and 3/pi//sup 0/ can be unambiguously reconstructed with very little background. For the suppressed decay /tau//sup /minus// /yields/ /pi//sup /minus///eta//pi//sup 0//nu//sub /tau//, only the ultimate detector has the sensitivity. The ultimate detector is also sensitive to the more suppressed decay /tau//sup /minus// /yields/ K/sup /minus///eta//nu//sub /tau// and the moderate detector may have the sensitivity if the hadronic background is not significantly larger than that predicted by Lund. In the case of the highly suppressed second-class-current decay /tau//sup /minus// /yields/ /pi//sup /minus///eta//nu//sub /tau//, only the ultimate detector has sensitivity. The sensitivity can be greatly enhanced with a small-angle photon veto. 16 refs., 9 figs., 2 tabs.

  15. V_us From Hadronin Tau Decays

    E-print Network

    Kim Maltman; C. E. Wolfe

    2006-03-25

    We study the reliability of extractions of |V_{us}| based on flavor-breaking hadronic tau decay sum rules. The ``(0,0) spectral weight'', proposed previously as a favorable candidate for this extraction, is shown to produce results having poor stability with respect to s_0, the upper limit on the relevant spectral integral, suggesting theoretical errors much larger than previously anticipated. We argue that this instability is due to the poor convergence of the integrated D=2 OPE series. Alternate weight choices designed to bring this convergence under better control are shown to produce significantly improved stability, and determinations of |V_{us}| which are both mutually compatible, and consistent, within errors, with values obtained by other methods.

  16. CP Violation in Tau to K* Decays

    SciTech Connect

    Hodgkinson, Mark; /Manchester U.

    2006-03-10

    A sample of {tau}{sup {+-}} {yields} K*{sup {+-}} decays with K*{sup {+-}} {yields} K{sub S}{sup 0}{pi}{sup {+-}} and K{sub S}{sup 0} {yields} {pi}{sup +}{pi}{sup -}, using 123.4 fb{sup -1} of data collected by the BaBar detector at the Stanford Linear Accelerator Center, is used to search for a direct CP violation effect in the charged Higgs sector. No evidence of CP violation is found and the imaginary part of the charged Higgs coupling, {l_brace}Im{r_brace}({Lambda}), in the Multi-Higgs-Doublet-Model is found to be at -0.284 < {l_brace}Im{r_brace}({Lambda}) < 0.200 at 90% Confidence Level. In addition the installation of the kk2f Monte Carlo generator into the BaBar software framework is described.

  17. First measurement of the branching fraction of the decay psi(2S)-->tau+tau-

    Microsoft Academic Search

    J. Z. Bai; Y. Ban; J. G. Bian; I. Blum; A. D. Chen; H. F. Chen; H. S. Chen; J. Chen; X. D. Chen; Y. Chen; B. S. Cheng; S. P. Chi; Y. P. Chu; J. B. Choi; X. Z. Cui; Y. S. Dai; L. Y. Dong; Z. Z. Du; W. Dunwoodie; H. Y. Fu; L. P. Fu; C. S. Gao; P. Gratton; S. D. Gu; Y. F. Gu; Y. N. Guo; Z. J. Guo; S. W. Han; Y. Han; F. A. Harris; J. He; K. L. He; M. He; X. He; T. Hong; Y. K. Heng; D. G. Hitlin; G. Y. Hu; H. M. Hu; Q. H. Hu; T. Hu; G. S. Huang; X. P. Huang; Y. Z. Huang; J. M. Izen; X. B. Ji; C. H. Jiang; Y. Jin; B. D. Jones; J. S. Kang; Z. J. Ke; M. H. Kelsey; B. K. Kim; H. J. Kim; S. K. Kim; T. Y. Kim; D. Kong; Y. F. Lai; A. Lankford; D. Li; H. B. Li; H. H. Li; J. Li; P. Q. Li; Q. J. Li; R. Y. Li; W. Li; X. N. Li; X. Q. Li; B. Liu; F. Liu; Feng. Liu; H. M. Liu; J. Liu; T. R. Liu; R. G. Liu; Y. Liu; Z. X. Liu; X. C. Lou; B. Lowery; G. R. Lu; F. Lu; J. G. Lu; Z. J. Lu; X. L. Luo; E. C. Ma; J. M. Ma; R. Malchow; H. S. Mao; Z. P. Mao; X. C. Meng; X. H. Mo; J. Nie; Z. D. Nie; S. L. Olsen; J. Oyang; D. Paluselli; L. J. Pan; J. Panetta; F. Porter; N. D. Qi; X. R. Qi; C. D. Qian; J. F. Qiu; Y. K. Que; G. Rong; M. Schernau; Y. Y. Shao; B. W. Shen; D. L. Shen; H. Shen; X. Y. Shen; H. Y. Sheng; F. Shi; H. Z. Shi; X. F. Song; J. Standifird; J. Y. Suh; H. S. Sun; L. F. Sun; Y. Z. Sun; S. Q. Tang; W. Toki; G. L. Tong; G. S. Varner; J. Wang; L. Wang; Meng Wang; P. Wang; S. M. Wang; Y. Y. Wang; Z. Y. Wang; M. Weaver; C. L. Wei; J. M. Wu; N. Wu; D. M. Xi; X. M. Xia; X. X. Xie; G. F. Xu; Y. Xu; S. T. Xue; W. B. Yan; W. G. Yan; C. M. Yang; C. Y. Yang; G. A. Yang; H. X. Yang; X. F. Yang; M. H. Ye; S. W. Ye; Y. X. Ye; C. S. Yu; C. X. Yu; G. W. Yu; Y. Yuan; B. Y. Zhang; C. Zhang; D. H. Zhang; H. L. Zhang; H. Y. Zhang; J. Zhang; L. Zhang; P. Zhang; Q. J. Zhang; S. Q. Zhang; X. Y. Zhang; Y. Y. Zhang; Z. P. Zhang; D. X. Zhao; H. W. Zhao; Jiawei Zhao; M. Zhao; P. P. Zhao; W. R. Zhao; Y. B. Zhao; Z. G. Zhao; J. P. Zheng; L. S. Zheng; Z. P. Zheng; B. Q. Zhou; G. M. Zhou; L. Zhou; K. J. Zhu; Q. M. Zhu; Y. C. Zhu; Y. S. Zhu; Z. A. Zhu; B. A. Zhuang; B. S. Zou

    2002-01-01

    The branching fraction of the psi(2S) decay into tau+tau- has been measured for the first time using the BES detector at the Beijing Electron-Positron Collider. The result is Btautau=(2.71+\\/-0.43+\\/-0.55)×10-3, where the first error is statistical and the second is systematic. This value, along with those for the branching fractions into e+e- and mu+mu- of this resonance, satisfy well the relation

  18. Search for CP violation in tau--> K(pi)nu(tau) decays.

    PubMed

    Bonvicini, G; Cinabro, D; Dubrovin, M; McGee, S; Bornheim, A; Lipeles, E; Pappas, S P; Shapiro, A; Sun, W M; Weinstein, A J; Masek, G; Paar, H P; Mahapatra, R; Morrison, R J; Briere, R A; Chen, G P; Ferguson, T; Tatishvili, G; Vogel, H; Adam, N E; Alexander, J P; Bebek, C; Berkelman, K; Blanc, F; Boisvert, V; Cassel, D G; Drell, P S; Duboscq, J E; Ecklund, K M; Ehrlich, R; Gibbons, L; Gittelman, B; Gray, S W; Hartill, D L; Heltsley, B K; Hsu, L; Jones, C D; Kandaswamy, J; Kreinick, D L; Magerkurth, A; Mahlke-Krüger, H; Meyer, T O; Mistry, N B; Nordberg, E; Palmer, M; Patterson, J R; Peterson, D; Pivarski, J; Riley, D; Sadoff, A J; Schwarthoff, H; Shepherd, M R; Thayer, J G; Urner, D; Valant-Spaight, B; Viehhauser, G; Warburton, A; Weinberger, M; Athar, S B; Avery, P; Prescott, C; Stoeck, H; Yelton, J; Brandenburg, G; Ershov, A; Kim, D Y-J J; Wilson, R; Benslama, K; Eisenstein, B I; Ernst, J; Gollin, G D; Hans, R M; Karliner, I; Lowrey, N; Marsh, M A; Plager, C; Sedlack, C; Selen, M; Thaler, J J; Williams, J; Edwards, K W; Ammar, R; Besson, D; Zhao, X; Anderson, S; Frolov, V V; Kubota, Y; Lee, S J; Li, S Z; Poling, R; Smith, A; Stepaniak, C J; Urheim, J; Ahmed, S; Alam, M S; Jian, L; Saleem, M; Wappler, F; Eckhart, E; Gan, K K; Gwon, C; Hart, T; Honscheid, K; Hufnagel, D; Kagan, H; Kass, R; Pedlar, T K; Thayer, J B; von Toerne, E; Wilksen, T; Zoeller, M M; Richichi, S J; Severini, H; Skubic, P; Dytman, S A; Nam, S; Savinov, V; Chen, S; Hinson, J W; Lee, J; Miller, D H; Pavlunin, V; Shibata, E I; Shipsey, I P J; Cronin-Hennessy, D; Lyon, A L; Park, C S; Park, W; Thorndike, E H; Coan, T E; Gao, Y S; Liu, F; Maravin, Y; Narsky, I; Stroynowski, R; Ye, J; Artuso, M; Boulahouache, C; Bukin, K; Dambasuren, E; Mountain, R; Skwarnicki, T; Stone, S; Wang, J C; Mahmood, A H; Csorna, S E; Danko, I; Xu, Z

    2002-03-18

    We search and find no evidence for CP violation in tau decays into the K(pi)nu(tau) final state. We provide limits on the imaginary part of the coupling constant Lambda describing a relative contribution of the CP violating processes with respect to the standard model to be -0.172

  19. Tau neutrino propagation and tau energy loss

    E-print Network

    Sharada Iyer Dutta; Yiwen Huang; Mary Hall Reno

    2005-06-16

    Electromagnetic energy loss of tau leptons is an important ingredient for eventual tau neutrino detection from high energy astrophysical sources. Proposals have been made to use mountains as neutrino converters, in which the emerging tau decays in an air shower. We use a stochastic evaluation of both tau neutrino conversion to taus and of tau electromagnetic energy loss. We examine the effects of the propagation for mono-energetic incident tau neutrinos as well as for several neutrino power-law spectra. Our main result is a parameterization of the tau electromagnetic energy loss parameter beta. We compare our analytic expression for the tau flux using this beta with other parameterizations of beta.

  20. ({omega},{phi})P{sup -} decays of tau leptons

    SciTech Connect

    Flores-Tlalpa, A.; Castro, G. Lopez [Departamento de Fisica, Cinvestav, Apartado Postal 14-740, 07000 Mexico, D.F. (Mexico)

    2008-06-01

    The {tau}{sup -}{yields}({omega},{phi})P{sup -}{nu}{sub {tau}} decays, where P{sup -}={pi}{sup -} or K{sup -}, are considered within a phenomenological model with dominance of meson intermediate states. We assume SU(3) flavor symmetry to fix some of the unknown strong interaction couplings. Our predictions for the {tau}{sup -}{yields}{phi}({pi}{sup -},K{sup -}){nu}{sub {tau}} branching fractions are in good agreement with recent measurements of the BABAR and BELLE Collaborations.

  1. Measurement of radiative tau decays tau -> l gamma nu anti-nu at BaBar

    E-print Network

    Benjamin Oberhof

    2015-02-06

    We perform a measurement of the branching fractions for tau -> l gamma nu anti-nu (l= e, mu) decays for a minimum photon energy of 10 MeV in the tau rest frame using 430 fb^-1 of e^+ e^- collisions collected at the center-of-mass energy of the Upsilon(4S) resonance around 10.58GeV with the BaBar detector at the PEP-II storage rings. We find B(tau -> mu gamma nu nu) = (3.69pm0.03pm0.10)x10^-3 and B(tau -> e gamma nu anti-nu) = (1.847pm0.015pm0.052)x10^-2 where the first quoted error is statistical and the second is systematic. These results represent a substantial improvement with respect to existing measurements for both channels.

  2. Tau Physics: Theory Overview

    E-print Network

    A. Pich

    2008-06-17

    The present status of some selected topics on tau physics is presented: charged-current universality tests, bounds on lepton-flavour violation, the determination of alpha_s from the inclusive tau hadronic width, the measurement of |V_{us}| through the Cabibbo-suppressed decays of the tau, and the theoretical description of the "tau -> nu_tau K pi" spectrum.

  3. Study of the Tau- to Pi- Pi+ Pi- Pi0 Nu/Tau And Tau- to Pi- Pi- Pi+ Eta Nu/Tau Decays Using the BaBar Detector

    SciTech Connect

    Sobie, Randall; /Victoria U.

    2007-11-14

    The {tau}{sup -} {yields} {pi}{sup -}{pi}{sup +}{pi}{sup -}{nu}{sub {tau}} and {tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{eta}{nu}{sub {tau}} decays have been studied with the BABAR detector. Preliminary branching fractions on the two modes are presented. The {tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{eta}{nu}{sub {tau}} mode is found to have a large contribution from the {tau}{sup -} {yields} {omega}{pi}{sup -}{nu}{sub {tau}} decay. The {tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{eta}{nu}{sub {tau}} decay is studied using the {eta} {yields} {gamma}{gamma} mode and the {tau}{sup -} f{sub 1}(1285){pi}{sup -}{nu}{sub {tau}} decay is seen to be the primary source of these decays. A 90% confidence level upper limit is placed on the {tau}{sup -} {yields} {eta}{prime}(958){pi}{sup -}{nu}{sub {tau}} decay which proceeds through a second-class current and is expected to be forbidden in the limit of perfect isospin symmetry.

  4. Higgs Boson decay to Tau Pairs at the CMS Experiment

    NASA Astrophysics Data System (ADS)

    Choudhury, Somnath

    2015-03-01

    The results on the standard model Higgs boson in tau pair decay using 25 fb-1 of pp collision data at 7 and 8 TeV center-of-mass energies collected by the CMS detector at the LHC has been presented. A direct evidence of the Higgs-lepton coupling is established with the tau pair decay mode. Searches for Higgs bosons decaying to tau leptons in scenarios beyond the standard model such as supersymmetry within the minimal extension of the model has also been reported.

  5. An upper limit for the tau neutrino mass from tau -> 5pi(pi0)nutau decays

    Microsoft Academic Search

    Damir Buskulic; David William Casper; I. de Bonis; D. Decamp; P. Ghez; C. Goy; J.-P. Lees; M.-N. Minard; P. Odier; B. Pietrzyk; F. Ariztizabal; M. Chmeissani; J. M. Crespo; I. Efthymiopoulos; E. Fernandez; M. Fernandez-Bosman; V. Gaitan; Ll. Garrido; M. Martinez; S. Orteu; A. Pacheco; C. Padilla; Fabrizio Palla; A. Pascual; J. A. Perlas; F. Sanchez; F. Teubert; D. Creanza; M. de Palma; A. Farilla; Giuseppe Iaselli; G. Maggi; N. Marinelli; S. Natali; S. Nuzzo; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; X. Huang; J. Lin; Q. Ouyang; T. Wang; Y. Xie; R. Xu; S. Xue; J. Zhang; L. Zhang; W. Zhao; G. Bonvicini; David G Cassel; M. Cattaneo; P. Comas; P. Coyle; H. Drevermann; A. Engelhardt; Roger W Forty; M. Frank; G. Ganis; M. Girone; R. Hagelberg; J. Harvey; R. Jacobsen; P. Janot; B. Jost; J. Knobloch; Ivan Lehraus; M. Maggi; C. Markou; E. B. Martin; P. Mato; H. Meinhard; Adolf G Minten; R. Miquel; K. Moffeit; P. Palazzi; J. R. Pater; P. Perrodo; J.-F. Pusztaszeri; F. Ranjard; Luigi Rolandi; D. Schlatter; M. Schmelling; W. Tejessy; I. R. Tomalin; R. Veenhof; A. Venturi; H W Wachsmuth; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Ziad J Ajaltouni; Maria Bardadin-Otwinowska; A. Barres; C. Boyer; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; S. Monteil; J.-C. Montret; D. Pallin; P. Perret; F. Podlyski; J. Proriol; J.-M. Rossignol; F. Saadi; Tom Fearnley; J. B. Hansen; J. D. Hansen; P. H. Hansen; S. D. Johnson; B. S. Nilsson; A. Kyriakis; Errietta Simopoulou; I. Siotis; Anna Vayaki; K. Zachariadou; A. Blondel; G R Bonneaud; J. C. Brient; P. Bourdon; L. Passalacqua; A. Rougé; M. Rumpf; R. Tanaka; Andrea Valassi; M. Verderi; H L Videau; D. J. Candlin; M. I. Parsons; E. Veitch; E. Focardi; G. Parrini; M. Corden; M C Delfino; C H Georgiopoulos; D. E. Jaffe; A. Antonelli; G. Bencivenni; G. Bologna; F. Bossi; P. Campana; G. Capon; F. Cerutti; V. Chiarella; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; M. Pepe-Altarelli; S. Salomone; P. Colrain; I. Ten Have; I. G. Knowles; J. G. Lynch; W J Maitland; W. T. Morton; C. Raine; P. Reeves; J. M. Scarr; K. Smith; M. G. Smith; A. S. Thompson; S. Thorn; R. M. Turnbull; U. Becker; O. Braun; C. Geweniger; G. Graefe; P. Hanke; V. Hepp; E. E. Kluge; A. Putzer; B. Rensch; M. Schmidt; J. Sommer; H. Stenzel; K. Tittel; M. Wunsch; R. Beuselinck; David M Binnie; W. Cameron; D. J. Colling; Peter J Dornan; N P Konstantinidis; L. Moneta; A. Moutoussi; J. Nash; G. San Martin; J. K. Sedgbeer; A. M. Stacey; G. Dissertori; P. Girtler; E. Kneringer; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Keemer; M. Nuttall; A D Patel; Terence Sloan; S. W. Snow; E. P. Whelan; A. Galla; A. M. Greene; K. Kleinknecht; J. Raab; B. Renk; H.-G. Sander; H. Schmidt; S. M. Walther; R. Wanke; B. Wolf; Jean-Jacques Aubert; A. M. Bencheikh; C. Benchouk; A. Bonissent; G. Bujosa; D. Calvet; J. Carr; C A Diaconu; F. Etienne; M. Thulasidas; D. Nicod; P. Payre; D. Rousseau; M. Talby; I. Abt; R W Assmann; C. Bauer; Walter Blum; D. Brown; H. Dietl; Friedrich Dydak; C. Gotzhein; A. W. Halley; K. Jakobs; H. Kroha; G. Lütjens; Gerhard Lutz; W. Männer; H.-G. Moser; R H Richter; A. Rosado-Schlosser; A. S. Schwarz; Ronald Settles; H C J Seywerd; U. Stierlin; R. St. Denis; G. Wolf; R. Alemany; J. Boucrot; O. Callot; A. Cordier; F. Courault; M. Davier; L. Duflot; J.-F. Grivaz; Ph. Heusse; M. Jacquet; D. W. Kim; F R Le Diberder; J. Lefrançois; A.-M. Lutz; G. Musolino; I A Nikolic; H. J. Park; I. C. Park; M.-H. Schune; S. Simion; J.-J. Veillet; I. Videau; P. Azzurri; D. Abbaneo; G. Bagliesi; G. Batignani; S. Bettarini; U. Bottigli; C. Bozzi; G. Calderini; M. Carpinelli; M. A. Ciocci; V. Ciulli; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; F. Forti; A. Giassi; M. A. Giorgi; A. Gregorio; F. Ligabue; A. Lusiani; P. S. Marrocchesi; A. Messineo; G. Rizzo; G. Sanguinetti; A. Sciabà; P. Spagnolo; Jack Steinberger; Roberto Tenchini; G. Tonelli; G. Triggiani; C. Vannini; P. G. Verdini; J. Walsh; A. P. Betteridge; G. A. Blair; L. M. Bryant; Y. S. Gao; M. G. Green; D. L. Johnson; T. Medcalf; Ll. M. Mir; J. A. Strong; V. Bertin; David R Botterill; R. W. Clifft; T. R. Edgecock; S. Haywood; M. Edwards; P. Maley; P. R. Norton; J. C. Thompson; B. Bloch-Devaux; P. Colas; H. Duarte; S. Emery; Witold Kozanecki; E. Lançon; M. C. Lemaire; E. Locci; B. Marx; P. Perez; J. Rander; J.-F. Renardy; A. Rosowsky; A. Roussarie; J.-P. Schuller; J. Schwindling; D. Si Mohand; A. Trabelsi; B. Vallage; R. P. Johnson; A. M. Litke; G. Taylor; J. Wear; A. Beddall; C. N. Booth; R. Boswell; S L Cartwright; F. Combley; I. Dawson; A. Koksal; M H Lehto; W. M. Newton; C. Rankin; L. F. Thompson; A. Böhrer; S. Brandt; G D Cowan; E. Feigl; Claus Grupen; G. Lutters

    1995-01-01

    From a sample of 152,000 tau decays collected by the ALEPH detector at LEP an upper limit of 24 MeV at 95% CL on the tau neutrino mass has been determined. The limit is obtained using a two dimensional likelihood fit of the visible energy and the invariant mass distribution of 25 tau -> 5pi(pi0)nutau events.

  6. Lepton-Flavor-Violating Tau Decays at BaBar

    SciTech Connect

    Marchiori, G.; /Paris, LPTHE

    2012-04-09

    We present the most recent searches for lepton-flavor-violating (LFV) {tau} decays in BABAR. We find no evidence of {tau} decaying to three charged leptons or to a charged lepton and a neutral meson (K{sub S}{sup 0}, {rho}, {phi}, K*{sup 0}, {bar K}*{sup 0}), and set upper limits on the corresponding branching fractions (BF) between 1.8 and 19 x 10{sup -8} at 90% confidence level (CL).

  7. Sensitivity to the Higgs sector of SUSY-seesaw models via LFV tau decays

    SciTech Connect

    Herrero, M.; Rodriguez-Sanchez, A. [Departamento de Fisica Teorica and Instituto de Fisica Teorica, IFT-UAM/CSIC, Universidad Autonoma de Madrid, Cantoblanco, E-28049 Madrid (Spain); Portoles, J. [IFIC, Universitat de Valencia-CSIC, Apt. Correus 22085, E-46071 Valencia (Spain)

    2010-02-10

    Here we study and compare the sensitivity to the Higgs sector of SUSY-seesaw models via the LFV tau decays: tau->3mu, tau->muK{sup +}K{sup -}, tau->mueta and tau->mu f{sub 0}. We emphasize that, at present, the two latter channels are the most efficient ones to test indirectly the Higgs particles.

  8. Charged-Higgs-boson effects in the B{yields}D{tau}{nu}{sub {tau}} differential decay distribution

    SciTech Connect

    Nierste, Ulrich; Trine, Stephanie; Westhoff, Susanne [Institut fuer Theoretische Teilchenphysik, Karlsruhe Institute of Technology, 76128 Karlsruhe (Germany)

    2008-07-01

    We show that the decay mode B{yields}D{tau}{nu}{sub {tau}} is competitive with and complementary to B{yields}{tau}{nu}{sub {tau}} in the search for charged-Higgs effects. Updating the relevant form factors, we find that the differential distribution in the decay chain B{yields}D{nu}{sub {tau}}{tau}{sup -}[{yields}{pi}{sup -}{nu}{sub {tau}}] excellently discriminates between standard model and charged-Higgs contributions. By measuring the D and {pi}{sup -} energies and the angle between the D and {pi}{sup -} three-momenta, one can determine the effective charged-Higgs coupling including a possible CP-violating phase.

  9. Meson dominance in the 'second class' {tau}{yields}{eta}{pi}{nu}{sub {tau}}decay

    SciTech Connect

    Paver, N.; Riazuddin [Department of Physics, University of Trieste, 34100 Trieste (Italy) and INFN-Sezione di Trieste, 34100 Trieste (Italy); Centre for Advanced Mathematics and Physics, National University of Sciences and Technology, Rawalpindi, Pakistan and National Centre for Physics, Quaid-i-Azam University, Islamabad (Pakistan)

    2010-09-01

    Motivated by recent estimates of the isospin-violating process {tau}{yields}{eta}{pi}{nu}{sub {tau}}, mostly relying on the {rho} and a{sub 0} dominance of the relevant form factors near threshold, we present an assessment for the branching ratio that accounts for additional, potential effects from the lowest radial excitations {rho}{sup '{identical_to}{rho}}(1450) and a{sub 0}{sup '{identical_to}}a{sub 0}(1450), respectively, also lying in the decay phase space.

  10. Search for tau- ---> 4pi- 3pi+ (pi0) nu/tau Decays

    SciTech Connect

    Ter-Antonian, R.; Kass, R.; Allmendinger, T.; /Ohio State U.; Hast, C.; /SLAC

    2005-06-21

    A search for the decay of the {tau} lepton to seven charged pions and at most one {pi}{sup 0} was performed using the BABAR detector at the PEP-II e{sup +}e{sup -} collider. The analysis uses data recorded on and near the {Upsilon}(4S) resonance between 1999 and 2003, a total of 124.3 fb{sup -1}. They observe 7 events with an expected background of 11.9 {+-} 2.2 events and calculate a preliminary upper limit of BR({tau}{sup -} {yields} 4{pi}{sup -} 3{pi}{sup +}({pi}{sup 0}){nu}{sub {tau}}) < 2.7 x 10{sup -7} at 90% CL. This is a significant improvement over the previous limit established by the CLEO Collaboration.

  11. Measurement of Cabibbo-suppressed decays of the tau lepton

    Microsoft Academic Search

    M. Battle; J. Ernst; Y. Kwon; S. Roberts; E. H. Thorndike; C. H. Wang; J. Dominick; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; P. Zadorozhny; M. Artuso; M. Goldberg; D. He; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; S. Stone; M. Thulasidas; G. Vasseur; G. Zhu; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; K. Kinoshita; K. W. Edwards; M. Ogg; D. I. Britton; E. R. F. Hyatt; D. B. Macfarlane; P. M. Patel; D. S. Akerib; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'grady; J. Urheim; A. J. Weinstein; D. Acosta; M. Athanas; G. Masek; H. P. Paar; M. Sivertz; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; A. Ryd; H. Tajima; D. Sperka; M. S. Witherell; M. Procario; R. Balest; K. Cho; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; P. S. Drell; R. Ehrlich; P. Gaiderev; R. S. Galik; M. Garcia-Sciveres; G. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; S. Salman; M. Sapper; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; S. Yang; J. Yelton; D. Cinabro; S. Henderson; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; G. Gollin; B. Ong; M. Palmer; M. Selen; J. J. Thaler; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; N. Kwak; H. Lam; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'neill; H. Severini; C. R. Sun; M. M. Zoeller; G. Crawford; C. M. Daubenmier; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; R. Malchow; Y. Skovpen; M. Sung; C. White; F. Butler; X. Fu; G. Kalbfleisch; W. R. Ross; P. Skubic; J. Snow; P. L. Wang; M. Wood; D. N. Brown; J. Fast; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; D. Payne; E. I. Shibata; I. P. Shipsey; P. N. Wang

    1994-01-01

    Branching ratios for the dominant Cabibbo-suppressed decays of the tau lepton have been measured by CLEO II in e+e- annihilation at the Cornell Electron Storage Ring (&surd;s ~10.6 GeV) using kaons with momenta below 0.7 GeV\\/c. The inclusive branching ratio into one charged kaon is (1.60+\\/-0.12+\\/-0.19)%. For the exclusive decays, B(tau--->K-nutau)=(0.66+\\/-0.07+\\/-0.09)%, B(tau--->K-pi0nutau)=(0.51 +\\/-0.10+\\/-0.07)%, and, based on three events, B(tau--->K-2pi0nutau)<0.3% at

  12. Lepton Flavour Violation in Tau Decays at BaBar

    SciTech Connect

    Wilson, F.F.; /Rutherford

    2011-11-07

    Recent results from {tau} physics studies at BABAR are presented with an emphasis on Lepton Flavour Violation measurements. The results from the current generation of B-meson Factories are already beginning to constrain the parameter space of models that go beyond the Standard Model. By the end of their data-taking, the current generation of B-meson factories will have produced nearly 2 billion {tau} pair decays. The physics potential of this legacy has only just begun to be exploited.

  13. Study of the tau- ---> pi- pi- pi+ pi0 pi0 nu/tau and tau- --> 3h- 2h+ nu/tau Decays Using the BaBar Detector

    SciTech Connect

    Sobie, R.; /Victoria U.

    2005-06-21

    The {tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{pi}{sup 0}{pi}{sup 0}{nu}{sub {tau}} and {tau}{sup -} {yields} 3h{sup -} 2h{sup +} {nu}{sub {tau}} decays have been studied using the BABAR experiment at the PEP-II e{sup +}e{sup -} storage ring. Preliminary branching fractions are given for the {tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}{pi}{sup 0}{pi}{sup 0}{nu}{sub {tau}} and to the sub-channels {tau}{sup -} {yields} {eta}{pi}{sup -} {pi}{sup 0}{nu}{sub {tau}} and {tau}{sup -} {yields} {omega}(782){pi}{sup -}{pi}{sup 0}{nu}{sub {tau}}. A preliminary upper limit is given on the branching fraction for the {phi}(1020){pi}{sup -}{pi}{sup 0}{nu}{sub {tau}} mode. In addition a preliminary measurement of the branching fraction of the {tau}{sup -} {yields} 3h{sup -}2h{sup +} {nu}{sub {tau}} decay (h = {pi}, K) is presented.

  14. Wess-Zumino current and the structure of the decay tau(-)-> K-pi K--(+)nu(tau)

    E-print Network

    Besson, David Zeke

    2004-06-01

    We present the first study of the vector (Wess-Zumino) current in tau(-)-->K(-)pi(-)K(+)nu(tau) decay using data collected with the CLEO III detector at the Cornell Electron Storage Ring. We determine the quantitative contributions to the decay...

  15. Measurement of the polarization of tau leptons produced in Z decays

    Microsoft Academic Search

    M. Martinez; B. Deschizeaux; C. Goy; J.-P. Lees; M.-N. Minard; R. Alemany; J. M. Crespo; M C Delfino; E. Fernandez; V. Gaitan; Ll. Garrido; Ll. M. Mir; A. Pacheco; M. G. Catanesi; D. Creanza; M. de Palma; A. Farilla; Giuseppe Iaselli; G. Maggi; M. Maggi; S. Natali; S. Nuzzo; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. S. Gao; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Ruan; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; W. B. Atwood; L. A. T. Bauerdick; F. Bird; E. Blucher; G. Bonvicini; F. Bossi; J. Boudreau; D. Brown; T. H. Burnett; H. Drevermann; Roger W Forty; C. Grab; R. Hagelberg; S. Haywood; J M Hilgart; B. Jost; M. Kasemann; J. Knobloch; A. Lacourt; E. Lançon; Ivan Lehraus; T. Lohse; A. Marchioro; P. Mato; S R Menary; Adolf G Minten; A. Miotto; R. Miquel; H.-G. Moser; J. Nash; P. Palazzi; F. Ranjard; G. Redlinger; A E Roth; J E Rothberg; Herbert Rotscheidt; M. Saich; R. St. Denis; D. Schlatter; M. Takashima; M. Talby; W. Tejessy; H W Wachsmuth; S R Wasserbaech; S. Wheeler; W. Wiedenmann; W. Witzeling; J. Wotschack; Ziad J Ajaltouni; Maria Bardadin-Otwinowska; R. El Fellous; A. Falvard; P. Gay; J. Harvey; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; J. Proriol; F. Prulhière; G. Stimpfl; J. D. Hansen; J. R. Hansen; P. H. Hansen; R. Møllerud; B. S. Nilsson; I. Efthymiopoulos; Errietta Simopoulou; Anna Vayaki; J. Badier; A. Blondel; G R Bonneaud; J. Bourotte; F. Braems; J. C. Brient; G. Fouque; A. Gamess; R. Guirlet; S. Orteu; A. Rosowsky; A. Rougé; M. Rumpf; R. Tanaka; H L Videau; D. J. Candlin; E. Veitch; G. Parrini; M. Corden; C H Georgiopoulos; M. Ikeda; J E Lannutti; D A Levinthal; Michael E Mermikides; L. Sawyer; A. Antonelli; R. Baldini; G. Bencivenni; G. Bologna; P. Campana; G. Capon; F. Cerutti; V. Chiarella; B. D'Ettorre-Piazzoli; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; G. Nicoletti; L. Passalacqua; M. Pepe-Altarelli; P. Picchi; P. Zografou; B. Altoon; O. Boyle; A. W. Halley; I. Ten Have; J. L. Hearns; J. G. Lynch; W. T. Morton; C. Raine; J. M. Scarr; K. Smith; A. S. Thompson; R. M. Turnbull; B. Brandl; O. Braun; R. Geiges; C. Geweniger; P. Hanke; V. Hepp; W. Hermann; E. E. Kluge; J. Liebmann; Y. Maumary; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; A. T. Belk; R. Beuselinck; David M Binnie; W. Cameron; M. Cattaneo; Peter J Dornan; S. Dugeay; A. M. Greene; J. F. Hassard; N. M. Lieske; S. J. Patton; D. G. Payne; M. J. Phillips; J. K. Sedgbeer; G. Taylor; I. R. Tomalin; A. G. Wright; P. Girtler; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; N. R. Keemer; M. Nuttall; A D Patel; B. S. Rowlingson; Terence Sloan; S. W. Snow; E. P. Whelan; T. Barczewski; K. Kleinknecht; J. Raab; B. Renk; S. Roehn; H.-G. Sander; M. Schmelling; H. Schmidt; F. Steeg; S. M. Walther; B. Wolf; J.-P. Albanese; Jean-Jacques Aubert; C. Benchouk; V. Bernard; A. Bonissent; D. Courvoisier; F. Etienne; S. Papalexiou; P. Payre; B. Pietrzyk; Z. Qian; H. Becker; Walter Blum; Paolo Walter Cattaneo; G D Cowan; Bernd Dehning; H. Dietl; Friedrich Dydak; M. Fernandez-Bosman; Traudl Hansl-Kozanecka; A. Jahn; Witold Kozanecki; E. Lange; J. Lauber; G. Lütjens; Gerhard Lutz; W. Männer; Y. Pan; R. Richter; J. Schröder; A. S. Schwarz; R. Settles; U. Stierlin; J. Thomas; G. Wolf; V. Bertin; J. Boucrot; O. Callot; X. Chen; A. Cordier; M. Davier; G. Ganis; J.-F. Grivaz; Ph. Heusse; P. Janot; D. W. Kim; F. Le Diberder; J. Lefrançois; A.-M. Lutz; J.-J. Veillet; I. Videau; Z. Zhang; F. Zomer; D. Abbaneo; S. R. Amendolia; G. Bagliesi; G. Batignani; L. Bosisio; U. Bottigli; C. Bradaschia; M. Carpinelli; M. A. Ciocci; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; E. Focardi; F. Forti; A. Giassi; M. A. Giorgi; F. Ligabue; A. Lusiani; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; L. Moneta; F. Palla; G. Sanguinetti; J. Steinberger; R. Tenchini; G. Tonelli; G. Triggiani; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; J. M. Carter; M. G. Green; P. V. March; T. Medcalf; I. S. Quazi; J. A. Strong; R. M. Thomas; L. R. West; T. Wildish; D. R. Botterill; R. W. Clifft; T. R. Edgecock; M. Edwards; S. M. Fisher; T. J. Jones; P. R. Norton; D. P. Salmon; J. C. Thompson; B. Bloch-Devaux; P. Colas; C. Klopfenstein; E. Locci; S. Loucatos; E. Monnier; P. Perez; J. A. Perlas; F. Perrier; J. Rander; J.-F. Renardy; A. Roussarie; J.-P. Schuller; J. Schwindling; B. Vallage; J. G. Ashman; C. N. Booth; C. Buttar; R. Carney; S. Cartwright; F. Combley; M. Dinsdale; M. Dogru; F. Hatfield; J. Martin; D. Parker; P. Reeves; L. F. Thompson; E. Barberio; S. Brandt; H. Burkhardt; C. Grupen; H. Meinhard; L. Mirabito; U. Schäfer; H. Seywerd; G. Apollinari; G. Giannini; B. Gobbo; F. Liello; F. Ragusa; L. Rolandi; U. Stiegler; L. Bellantoni

    1991-01-01

    The polarization of tau leptons produced in the reaction e+e--->tau+tau- at the Z resonance has been measured using the tau decay modes enuenutau, munumunutau, pinutau, varrhonutau, and a1nutau. The mean value obtained is Ptau = -0.152+\\/-0.045, indicating that parity is violated in the neutral current process e+e- --> tau+tau-. The result corresponds to a ratio of a neutral current vector

  16. Searches for Lepton Flavor Violation in the Decays tau±-->e±gamma and tau±-->mu±gamma

    Microsoft Academic Search

    B. Aubert; Y. Karyotakis; J. P. Lees; V. Poireau; E. Prencipe; X. Prudent; V. Tisserand; J. Garra Tico; E. Grauges; M. Martinelli; A. Palano; M. Pappagallo; G. Eigen; B. Stugu; L. Sun; M. Battaglia; D. N. Brown; B. Hooberman; L. T. Kerth; Yu. G. Kolomensky; G. Lynch; I. L. Osipenkov; K. Tackmann; T. Tanabe; C. M. Hawkes; N. Soni; A. T. Watson; H. Koch; T. Schroeder; D. J. Asgeirsson; C. Hearty; T. S. Mattison; J. A. McKenna; M. Barrett; A. Khan; A. Randle-Conde; V. E. Blinov; A. D. Bukin; A. R. Buzykaev; V. P. Druzhinin; V. B. Golubev; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; E. P. Solodov; K. Yu. Todyshev; M. Bondioli; S. Curry; I. Eschrich; D. Kirkby; A. J. Lankford; P. Lund; M. Mandelkern; E. C. Martin; D. P. Stoker; H. Atmacan; J. W. Gary; F. Liu; O. Long; G. M. Vitug; Z. Yasin; V. Sharma; C. Campagnari; T. M. Hong; D. Kovalskyi; M. A. Mazur; J. D. Richman; T. W. Beck; A. M. Eisner; C. A. Heusch; J. Kroseberg; W. S. Lockman; A. J. Martinez; T. Schalk; B. A. Schumm; A. Seiden; L. Wang; L. O. Winstrom; C. H. Cheng; D. A. Doll; B. Echenard; F. Fang; D. G. Hitlin; I. Narsky; P. Ongmongkolkul; T. Piatenko; F. C. Porter; R. Andreassen; G. Mancinelli; B. T. Meadows; K. Mishra; M. D. Sokoloff; P. C. Bloom; W. T. Ford; A. Gaz; J. F. Hirschauer; M. Nagel; U. Nauenberg; J. G. Smith; S. R. Wagner; R. Ayad; W. H. Toki; E. Feltresi; A. Hauke; H. Jasper; T. M. Karbach; J. Merkel; A. Petzold; B. Spaan; K. Wacker; M. J. Kobel; R. Nogowski; K. R. Schubert; R. Schwierz; D. Bernard; E. Latour; M. Verderi; P. J. Clark; S. Playfer; J. E. Watson; M. Andreotti; D. Bettoni; C. Bozzi; R. Calabrese; A. Cecchi; G. Cibinetto; E. Fioravanti; P. Franchini; E. Luppi; M. Munerato; M. Negrini; A. Petrella; L. Piemontese; V. Santoro; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; G. Finocchiaro; S. Pacetti; P. Patteri; I. M. Peruzzi; M. Piccolo; M. Rama; A. Zallo; R. Contri; E. Guido; M. Lo Vetere; M. R. Monge; S. Passaggio; C. Patrignani; E. Robutti; S. Tosi; M. Morii; A. Adametz; J. Marks; S. Schenk; U. Uwer; F. U. Bernlochner; H. M. Lacker; T. Lueck; A. Volk; P. D. Dauncey; M. Tibbetts; P. K. Behera; M. J. Charles; U. Mallik; J. Cochran; H. B. Crawley; L. Dong; V. Eyges; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; Y. Y. Gao; A. V. Gritsan; Z. J. Guo; N. Arnaud; A. D'Orazio; M. Davier; D. Derkach; J. Firmino da Costa; G. Grosdidier; F. Le Diberder; V. Lepeltier; A. M. Lutz; B. Malaescu; P. Roudeau; M. H. Schune; J. Serrano; V. Sordini; A. Stocchi; G. Wormser; D. J. Lange; D. M. Wright; I. Bingham; J. P. Burke; C. A. Chavez; J. R. Fry; E. Gabathuler; R. Gamet; D. E. Hutchcroft; D. J. Payne; C. Touramanis; A. J. Bevan; C. K. Clarke; F. di Lodovico; R. Sacco; M. Sigamani; G. Cowan; S. Paramesvaran; A. C. Wren; C. L. Davis; A. G. Denig; M. Fritsch; W. Gradl; A. Hafner; K. E. Alwyn; D. Bailey; R. J. Barlow; G. Jackson; G. D. Lafferty; T. J. West; J. I. Yi; J. Anderson; C. Chen; A. Jawahery; D. A. Roberts; G. Simi; J. M. Tuggle; C. Dallapiccola; E. Salvati; R. Cowan; D. Dujmic; P. H. Fisher; S. W. Henderson; G. Sciolla; M. Spitznagel; R. K. Yamamoto; M. Zhao; P. M. Patel; S. H. Robertson; M. Schram; P. Biassoni; A. Lazzaro; V. Lombardo; F. Palombo; S. Stracka; L. Cremaldi; R. Godang; R. Kroeger; P. Sonnek; D. J. Summers; H. W. Zhao; X. Nguyen; M. Simard; P. Taras; H. Nicholson; G. de Nardo; L. Lista; D. Monorchio; G. Onorato; C. Sciacca; G. Raven; H. L. Snoek; C. P. Jessop; K. J. Knoepfel; J. M. Losecco; W. F. Wang; L. A. Corwin; K. Honscheid; H. Kagan; R. Kass; J. P. Morris; A. M. Rahimi; S. J. Sekula; N. L. Blount; J. Brau; R. Frey; O. Igonkina; J. A. Kolb; M. Lu; R. Rahmat; N. B. Sinev; D. Strom; J. Strube; E. Torrence; G. Castelli; N. Gagliardi; M. Margoni; M. Morandin; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; C. Voci; P. Del Amo Sanchez; E. Ben-Haim; G. R. Bonneaud; H. Briand; J. Chauveau; O. Hamon; Ph. Leruste; G. Marchiori; J. Ocariz; A. Perez; J. Prendki; S. Sitt; L. Gladney; M. Biasini; E. Manoni; C. Angelini; G. Batignani; S. Bettarini; G. Calderini; M. Carpinelli; A. Cervelli; F. Forti; M. A. Giorgi; A. Lusiani; M. Morganti; N. Neri; E. Paoloni; G. Rizzo; J. J. Walsh; D. Lopes Pegna; C. Lu; J. Olsen; A. J. S. Smith; A. V. Telnov; F. Anulli; E. Baracchini; G. Cavoto; R. Faccini; F. Ferrarotto; F. Ferroni; M. Gaspero; P. D. Jackson; L. Li Gioi; M. A. Mazzoni; S. Morganti; G. Piredda; F. Renga; C. Voena; M. Ebert; T. Hartmann; H. Schröder; R. Waldi; T. Adye; B. Franek; E. O. Olaiya; F. F. Wilson; S. Emery; L. Esteve; G. Hamel de Monchenault; W. Kozanecki; G. Vasseur; Ch. Yèche; M. Zito; M. T. Allen; D. Aston; D. J. Bard; R. Bartoldus; J. F. Benitez; R. Cenci; J. P. Coleman; M. R. Convery; J. C. Dingfelder; J. Dorfan; G. P. Dubois-Felsmann; W. Dunwoodie; R. C. Field; M. Franco Sevilla; B. G. Fulsom; A. M. Gabareen; M. T. Graham; P. Grenier; C. Hast

    2010-01-01

    Searches for lepton-flavor-violating decays of a tau lepton to a lighter mass lepton and a photon have been performed with the entire data set of (963±7)×106tau decays collected by the BABAR detector near the Upsilon(4S), Upsilon(3S) and Upsilon(2S) resonances. The searches yield no evidence of signals and we set upper limits on the branching fractions of B(tau±-->e±gamma)<3.3×10-8 and B(tau±-->mu±gamma)<4.4×10-8 at

  17. Searches for Lepton flavor violation in the decays tau{+/-}-->e{+/-}gamma and tau{+/-}-->mu{+/-}gamma.

    PubMed

    Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Garra Tico, J; Grauges, E; Martinelli, M; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Battaglia, M; Brown, D N; Hooberman, B; Kerth, L T; Kolomensky, Yu G; Lynch, G; Osipenkov, I L; Tackmann, K; Tanabe, T; Hawkes, C M; Soni, N; Watson, A T; Koch, H; Schroeder, T; Asgeirsson, D J; Hearty, C; Mattison, T S; McKenna, J A; Barrett, M; Khan, A; Randle-Conde, A; Blinov, V E; Bukin, A D; Buzykaev, A R; Druzhinin, V P; Golubev, V B; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Solodov, E P; Todyshev, K Yu; Bondioli, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, A J; Lund, P; Mandelkern, M; Martin, E C; Stoker, D P; Atmacan, H; Gary, J W; Liu, F; Long, O; Vitug, G M; Yasin, Z; Sharma, V; Campagnari, C; Hong, T M; Kovalskyi, D; Mazur, M A; Richman, J D; Beck, T W; Eisner, A M; Heusch, C A; Kroseberg, J; Lockman, W S; Martinez, A J; Schalk, T; Schumm, B A; Seiden, A; Wang, L; Winstrom, L O; Cheng, C H; Doll, D A; Echenard, B; Fang, F; Hitlin, D G; Narsky, I; Ongmongkolkul, P; Piatenko, T; Porter, F C; Andreassen, R; Mancinelli, G; Meadows, B T; Mishra, K; Sokoloff, M D; Bloom, P C; Ford, W T; Gaz, A; Hirschauer, J F; Nagel, M; Nauenberg, U; Smith, J G; Wagner, S R; Ayad, R; Toki, W H; Feltresi, E; Hauke, A; Jasper, H; Karbach, T M; Merkel, J; Petzold, A; Spaan, B; Wacker, K; Kobel, M J; Nogowski, R; Schubert, K R; Schwierz, R; Bernard, D; Latour, E; Verderi, M; Clark, P J; Playfer, S; Watson, J E; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cecchi, A; Cibinetto, G; Fioravanti, E; Franchini, P; Luppi, E; Munerato, M; Negrini, M; Petrella, A; Piemontese, L; Santoro, V; Baldini-Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Pacetti, S; Patteri, P; Peruzzi, I M; Piccolo, M; Rama, M; Zallo, A; Contri, R; Guido, E; Lo Vetere, M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Tosi, S; Morii, M; Adametz, A; Marks, J; Schenk, S; Uwer, U; Bernlochner, F U; Lacker, H M; Lueck, T; Volk, A; Dauncey, P D; Tibbetts, M; Behera, P K; Charles, M J; Mallik, U; Cochran, J; Crawley, H B; Dong, L; Eyges, V; Meyer, W T; Prell, S; Rosenberg, E I; Rubin, A E; Gao, Y Y; Gritsan, A V; Guo, Z J; Arnaud, N; D'Orazio, A; Davier, M; Derkach, D; Firmino da Costa, J; Grosdidier, G; Le Diberder, F; Lepeltier, V; Lutz, A M; Malaescu, B; Roudeau, P; Schune, M H; Serrano, J; Sordini, V; Stocchi, A; Wormser, G; Lange, D J; Wright, D M; Bingham, I; Burke, J P; Chavez, C A; Fry, J R; Gabathuler, E; Gamet, R; Hutchcroft, D E; Payne, D J; Touramanis, C; Bevan, A J; Clarke, C K; Di Lodovico, F; Sacco, R; Sigamani, M; Cowan, G; Paramesvaran, S; Wren, A C; Brown, D N; Davis, C L; Denig, A G; Fritsch, M; Gradl, W; Hafner, A; Alwyn, K E; Bailey, D; Barlow, R J; Jackson, G; Lafferty, G D; West, T J; Yi, J I; Anderson, J; Chen, C; Jawahery, A; Roberts, D A; Simi, G; Tuggle, J M; Dallapiccola, C; Salvati, E; Cowan, R; Dujmic, D; Fisher, P H; Henderson, S W; Sciolla, G; Spitznagel, M; Yamamoto, R K; Zhao, M; Patel, P M; Robertson, S H; Schram, M; Biassoni, P; Lazzaro, A; Lombardo, V; Palombo, F; Stracka, S; Cremaldi, L; Godang, R; Kroeger, R; Sonnek, P; Summers, D J; Zhao, H W; Nguyen, X; Simard, M; Taras, P; Nicholson, H; De Nardo, G; Lista, L; Monorchio, D; Onorato, G; Sciacca, C; Raven, G; Snoek, H L; Jessop, C P; Knoepfel, K J; Losecco, J M; Wang, W F; Corwin, L A; Honscheid, K; Kagan, H; Kass, R; Morris, J P; Rahimi, A M; Sekula, S J; Blount, N L; Brau, J; Frey, R; Igonkina, O; Kolb, J A; Lu, M; Rahmat, R; Sinev, N B; Strom, D; Strube, J; Torrence, E; Castelli, G; Gagliardi, N; Margoni, M; Morandin, M; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Voci, C; Del Amo Sanchez, P; Ben-Haim, E; Bonneaud, G R; Briand, H; Chauveau, J; Hamon, O; Leruste, Ph; Marchiori, G; Ocariz, J; Perez, A; Prendki, J; Sitt, S; Gladney, L; Biasini, M; Manoni, E; Angelini, C; Batignani, G; Bettarini, S; Calderini, G; Carpinelli, M; Cervelli, A; Forti, F; Giorgi, M A; Lusiani, A; Morganti, M; Neri, N; Paoloni, E; Rizzo, G; Walsh, J J; Lopes Pegna, D; Lu, C; Olsen, J; Smith, A J S; Telnov, A V; Anulli, F; Baracchini, E; Cavoto, G; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Jackson, P D; Li Gioi, L; Mazzoni, M A; Morganti, S; Piredda, G; Renga, F; Voena, C; Ebert, M; Hartmann, T; Schröder, H; Waldi, R; Adye, T; Franek, B; Olaiya, E O; Wilson, F F; Emery, S; Esteve, L; Hamel de Monchenault, G; Kozanecki, W; Vasseur, G; Yèche, Ch; Zito, M; Allen, M T; Aston, D; Bard, D J; Bartoldus, R; Benitez, J F; Cenci, R; Coleman, J P; Convery, M R; Dingfelder, J C; Dorfan, J; Dubois-Felsmann, G P; Dunwoodie, W; Field, R C; Franco Sevilla, M; Fulsom, B G; Gabareen, A M; Graham, M T; Grenier, P; Hast, C; Innes, W R; Kaminski, J; Kelsey, M H; Kim, H; Kim, P; Kocian, M L; Leith, D W G S; Li, S; Lindquist, B; Luitz, S; Luth, V; Lynch, H L; Macfarlane, D B

    2010-01-15

    Searches for lepton-flavor-violating decays of a tau lepton to a lighter mass lepton and a photon have been performed with the entire data set of (963+/-7)x10{6} tau decays collected by the BABAR detector near the Upsilon(4S), Upsilon(3S) and Upsilon(2S) resonances. The searches yield no evidence of signals and we set upper limits on the branching fractions of B(tau{+/-}-->e{+/-}gamma)<3.3x10{-8} and B(tau{+/-}-->mu{+/-}gamma)<4.4x10{-8} at 90% confidence level. PMID:20366586

  18. Search for neutrinoless decays of the tau lepton

    Microsoft Academic Search

    J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; K. Kinoshita; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'grady; J. Urheim; A. J. Weinstein; D. Acosta; M. Athanas; G. Masek; H. P. Paar; M. Sivertz; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; A. Ryd; H. Tajima; D. Sperka; M. S. Witherell; M. Procario; R. Balest; K. Cho; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; P. S. Drell; R. Ehrlich; P. Gaidarev; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; S. Salman; M. Sapper; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; S. Yang; J. Yelton; D. Cinabro; S. Henderson; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; G. Gollin; B. Ong; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; M. Ogg; A. Bellerive; D. I. Britton; E. R. Hyatt; D. B. Macfarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; S. Kotov; I. Kravchenko; N. Kwak; H. Lam; Y. Kubota; M. Lattery; M. Momayezi; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'neill; H. Severini; C. R. Sun; M. M. Zoeller; G. Crawford; C. M. Daubenmier; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; R. Malchow; Y. Skovpen; M. Sung; C. White; F. Butler; X. Fu; G. Kalbfleisch; W. R. Ross; P. Skubic; M. Wood; J. Fast; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; D. Payne; E. I. Shibata; I. P. Shipsey; P. N. Wang; M. Battle; J. Ernst; L. Gibbons; Y. Kwon; S. Roberts; E. H. Thorndike; C. H. Wang; J. Dominick; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; P. Zadorozhny; M. Artuso; M. Goldberg; D. He; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; S. Stone; M. Thulasidas; G. Vasseur; X. Xing; G. Zhu

    1994-01-01

    A search for lepton flavor violating decays of the tau into either three charged leptons or one charged lepton and two charged hadrons was performed using 2.05 fb-1 of data collected by the CLEO-II experiment at the Cornell Electron Storage Ring. The upper limits obtained for 22 decay branching fractions are several times more stringent than those set previously.

  19. Measuring tau-polarisation in Neutralino2 decays at the LHC

    E-print Network

    Till Nattermann; Klaus Desch; Peter Wienemann; Carolin Zendler

    2009-03-29

    We show how the sum of the two average tau polarisations in the decay chain chi20 -> stau1 tau -> tau tau chi10 in minimal supersymmetry with conserved R-parity can be measured at the LHC. This is accomplished by exploiting the polarisation dependence of the visible di-tau mass spectrum. Such a measurement provides information on the couplings of the involved SUSY particles and allows a more precise determination of the di-tau mass endpoint. If different tau decay modes can be distinguished, the polarisation and endpoint measurement can be improved even further.

  20. Study of High-multiplicity 3-prong and 5-prong Tau Decays at BaBar

    SciTech Connect

    Lees, J.P

    2012-06-01

    We present measurements of the branching fractions of 3-prong and 5-prong {tau} decay modes using a sample of 430 million {tau} lepton pairs, corresponding to an integrated luminosity of 468 fb{sup -1}, collected with the BABAR detector at the PEP-II asymmetric energy e{sup +}e{sup -} storage rings. The {tau}{sup -} {yields} (3{pi}){sup -} {eta}{nu}{sub {tau}}, {tau}{sup -} {yields} (3{pi}){sup -} {yields} {omega}{nu}{sub {tau}} and {tau}{sup -} {yields} {pi}{sup -} f{sub 1}(1285){nu}{sub {tau}} branching fractions are presented as well as a new limit on the branching fraction of the isospin-forbidden, second-class current {tau}{sup -} {yields} {pi}{sup -} {eta}{prime}(958){nu}{sub {tau}} decay. We find no evidence for charged kaons in these decay modes and place the first upper limits on their branching fractions.

  1. Lepton Universality, |V(Us)| and Search for Second Class Current in Tau Decays

    SciTech Connect

    Banerjee, Swagato; /Victoria U.

    2011-11-10

    Several hundred million {tau} decays have been studied with the BABAR detector at the PEP-II e{sup +}e{sup -} collider at the SLAC National Accelerator Laboratory. Recent results on Charged Current Lepton Universality and two independent measurements of |V{sub us}| using {tau}{sup -} {yields} e{sup -}{bar {nu}}{sub e}{nu}{sub {tau}}, {mu}{sup -}{bar {nu}}{sub {mu}}{nu}{sub {tau}}, {pi}{sup -}{nu}{sub {tau}}, K{sup -} {nu}{sub {tau}} and K{sub S}{sup 0}{pi}{sup -} {nu}{sub {tau}} decays, and a search for Second Class Current in {tau}{sup -} {yields} {pi}{sup -} {omega}{nu}{sub {tau}} decays are presented, where the charge conjugate decay modes are also implied.

  2. Search for Lepton Flavor Violating Decays Tau+- to L+- Omega

    SciTech Connect

    Schenk, S.; /Heidelberg U.

    2011-11-30

    This paper reports on a search for lepton flavor violating decays of a {tau} lepton to a lighter-mass charged lepton and an {omega} vector meson. The data sample corresponds to an integrated luminosity of 384 fb{sup -1} recorded by the BaBar experiment at the SLAC PEP-II asymmetric-energy B Factory. No evidence for a signal is found and the upper limits on the branching ratios are determined to be B({tau}{sup {+-}} {yields} e{sup {+-}}{omega}) < 1.1 x 10{sup -7} and B({tau}{sup {+-}} {yields} {mu}{sup {+-}}{omega}) < 1.0 x 10{sup -7} at 90% confidence level.

  3. Decays of tau leptons to final states containing K0S mesons

    Microsoft Academic Search

    T. E. Coan; J. Dominick; V. Fadeyev; I. Korolkov; M. Lambrecht; S. Sanghera; V. Shelkov; R. Stroynowski; I. Volobouev; G. Wei; M. Artuso; A. Efimov; M. Gao; M. Goldberg; D. He; N. Horwitz; S. Kopp; G. C. Moneti; Y. Mukhin; S. Playfer; T. Skwarnicki; S. Stone; X. Xing; J. Bartelt; S. E. Csorna; V. Jain; S. Marka; A. Freyberger; D. Gibaut; K. Kinoshita; P. Pomianowski; S. Schrenk; D. Cinabro; B. Barish; M. Chadha; S. Chan; G. Eigen; J. S. Miller; C. O'grady; M. Schmidtler; J. Urheim; A. J. Weinstein; F. Würthwein; D. M. Asner; M. Athanas; D. W. Bliss; W. S. Brower; G. Masek; H. P. Paar; J. Gronberg; C. M. Korte; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. Roberts; A. Ryd; H. Tajima; M. S. Witherell; R. Balest; K. Cho; W. T. Ford; M. Lohner; P. Rankin; J. Roy; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; M. Dickson; P. S. Drell; D. J. Dumas; R. Ehrlich; R. Elia; P. Gaidarev; R. S. Galik; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; T. Lee; Y. Liu; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; A. Soffer; C. Ward; P. Avery; C. Prescott; S. Yang; J. Yelton; G. Brandenburg; R. A. Briere; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. E. Browder; F. Li; J. L. Rodriguez; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; K. W. McLean; M. Ogg; A. Bellerive; D. I. Britton; R. Janicek; D. B. Macfarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; S. Kotov; I. Kravchenko; N. Kwak; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; R. Poling; T. Riehle; V. Savinov; M. S. Alam; I. J. Kim; Z. Ling; A. H. Mahmood; J. J. O'neill; H. Severini; C. R. Sun; S. Timm; F. Wappler; J. E. Duboscq; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; M. Sung; A. Undrus; C. White; R. Wanke; A. Wolf; M. M. Zoeller; X. Fu; B. Nemati; S. J. Richichi; W. R. Ross; P. Skubic; M. Wood; M. Bishai; J. Fast; E. Gerndt; J. W. Hinson; T. Miao; D. H. Miller; M. Modesitt; E. I. Shibata; I. P. Shipsey; P. N. Wang; L. Gibbons; S. D. Johnson; Y. Kwon; S. Roberts; E. H. Thorndike; C. P. Jessop; K. Lingel; H. Marsiske; M. L. Perl; S. F. Schaffner; R. Wang

    1996-01-01

    Using data collected with the CLEO II detector at the Cornell Electron Storage Ring, we have studied the decays of tau leptons produced through e+e- annihilation into final states containing K0S mesons, observed through their decays to pi+pi-. We present branching fractions for decays to five final states: tau--->K0h-nutau, tau--->K0h-pi0nutau, tau--->K0K-nutau, tau--->K0K-pi0nutau, and tau--->K00SKSh-nutau, where K0h- denotes the sum of

  4. Search for CP Violation in the Decay tau- \\to pi- K^0_S (>= 0 pi0) nu_tau

    SciTech Connect

    Lees, J.P.; Poireau, V.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Martinelli, M.; /INFN, Bari /Bari U.; Milanes, D.A.; /INFN, Bari; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; /Bergen U.; Brown, D.N.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; /UC, Berkeley; Koch, H.; Schroeder, T.; /Ruhr U., Bochum; Asgeirsson, D.J.; Hearty, C.; Mattison, T.S.; McKenna, J.A.; /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /Indian Inst. Tech., Guwahati /Harvard U. /Harvey Mudd Coll. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Paris U., VI-VII /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /INFN, Naples /Naples U. /NIKHEF, Amsterdam /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /Pisa U. /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Southern Methodist U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas Nuclear Corp., Austin /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U. /Victoria U. /Warwick U. /Wisconsin U., Madison

    2012-02-16

    We report a search for CP violation in the decay {tau}{sup -} {yields} {pi}{sup -}K{sub S}{sup 0}({>=} 0{pi}{sup 0}){nu}{sub {tau}} using a dataset of 437 million {tau} lepton pairs, corresponding to an integrated luminosity of 476 fb{sup -1}, collected with the BABAR detector at the PEP-II asymmetric energy e{sup +}e{sup -} storage rings. The CP-violating decay-rate asymmetry is determined to be (-0.45 {+-} 0.24 {+-} 0.11)%, approximately three standard deviations from the Standard Model prediction of (0.33 {+-} 0.01)%.

  5. Heavy neutrinos and the kinematics of tau decays

    NASA Astrophysics Data System (ADS)

    Kobach, Andrew; Dobbs, Sean

    2015-03-01

    Searches for heavy neutrinos often rely on the possibility that the heavy neutrinos will decay to detectable particles. Interpreting the results of such searches requires a particular model for the heavy-neutrino decay. We present a method for placing limits on the probability that a tau can couple to a heavy neutrino, |U? 4|2 , using only the kinematics of semileptonic tau decays, instead of a specific model. Our study suggests that B factories with large data sets, such a Belle and BABAR, may be able to place stringent limits on |U? 4|2 as low as O (10-7-10-3) when 100 MeV ?m4?1.2 GeV , utilizing minimal assumptions regarding the decay modes of heavy neutrinos.

  6. A measurement of tau polarization in Z0 decays

    Microsoft Academic Search

    O. Adriani; M. Aguilar-Benitez; S. P. Ahlen; H. Akbari; J. Alcaraz; A. Aloisio; G. Alverson; M. G. Alviggi; G. Ambrosi; Q. An; H. Anderhub; A. L. Anderson; V. P. Andreev; T. Angelov; L. Antonov; D. Antreasyan; P. Arce; A. Arefiev; A G Atamanchuk; T. Azemoon; T. Aziz; P. V. K. S. Baba; P. Bagnaia; J. A. Bakken; L. Baksay; R. C. Ball; S. Banerjee; J. Bao; R. Barillère; L. Barone; A. Baschirotto; R. Battiston; A. Bay; F. Becattini; U. Becker; F. Behner; J. Behrens; S. Beingessner; Gy. L. Bencze; J. Berdugo; P. Berges; B. Bertucci; B. L. Betev; M. Biasini; A. Biland; G. M. Bilei; R. Bizzarri; J. J. Blaising; B. Blumenfeld; Gerjan J Bobbink; M. Bocciolini; R K Böck; A. Böhm; B. Borgia; M Bosetti; D. Bourilkov; Maurice Bourquin; D. Boutigny; B T Bouwens; Elena Brambilla; J. G. Branson; I. C. Brock; M. Brooks; C. Buisson; A T Bujak; J. D. Burger; W. J. Burger; J. P. Burq; J K Busenitz; X. D. Cai; M. Capell; M. Caria; G. Carlino; F. Carminati; A. M. Cartacci; R. Castello; M Cerrada-Canales; F. Cesaroni; Y. H. Chang; U. K. Chaturvedi; M. Chemarin; A. Chen; C. Chen; G. M. Chen; H. F. Chen; H. S. Chen; J. Chen; M. Chen; W. Y. Chen; G. Chiefari; C. Y. Chien; M. Chmeissani; M. T. Choi; S. Chung; C. Civinini; I. Clare; R. Clare; T. E. Coan; H. O. Cohn; G. Coignet; N. Colino; A. Contin; F. Crijns; X. T. Cui; X. Y. Cui; T. S. Dai; R. D'Alessandro; R. de Asmundis; A. Degré; K. Deiters; E. Dénes; P. Denes; F. Denotaristefani; M. Dhina; D. Dibitonto; M. Diemoz; H. R. Dimitrov; C. Dionisi; M. T. Dova; E. Drago; T. Driever; D. Duchesneau; P. Duinker; I. Duran; S. Easo; H. El Mamouni; A. Engler; F. J. Eppling; F. C. Erné; P. Extermann; R. Fabbretti; M. Fabre; S. Falciano; S. J. Fan; O. Fackler; J. Fay; M. Felcini; T. Ferguson; D. Fernandez; G. Fernandez; F. Ferroni; H. Fesefeldt; E. Fiandrini; J. Field; F. Filthaut; G. Finocchiaro; P. H. Fisher; G. Forconi; T. Foreman; K. Freudenreich; W. Friebel; M. Fukushima; M. Gailloud; Yu. Galaktionov; E. Gallo; S. N. Ganguli; P. Garcia-Abia; S Gentile; D. Gele; S. Goldfarb; Z. F. Gong; E. Gonzalez; P. Göttlicher; A. Gougas; D. Goujon; G. Gratta; C. Grinnell; M. Gruenewald; C. Gu; M. Guanziroli; J. K. Guo; V. K. Gupta; A. Gurtu; H. R. Gustafson; L. J. Gutay; K. Hangarter; A. Hasan; D. Hauschildt; C. F. He; T. Hebbeker; M. Hebert; G. Herten; U. Herten; A. Hervé; K. Hilgers; H. Hofer; H. Hoorani; G. Hu; B. Ille; M. M. Ilyas; V. Innocente; H. Janssen; S. Jezequel; B. N. Jin; L. W. Jones; A. Kasser; R. A. Khan; Yu. Kamyshkov; P. Kapinos; J. S. Kapustinsky; Y. Karyotakis; M N Kienzle-Focacci; S. Khokar; J. K. Kim; S. C. Kim; Y. G. Kim; W. W. Kinnison; D. Kirkby; S. Kirsch; W. Kittel; A Koulbardis; A. C. König; E. Koffeman; O. Kornadt; V. Koutsenko; R. W. Kraemer; T. Kramer; V. R. Krastev; W. Krenz; A. Krivshich; H. Kuijten; K. S. Kumar; A. Kunin; G. Landi; D. Lanske; S. Lanzano; P. Lebrun; P. Lecomte; P. Lecoq; P. Le Coultre; D. M. Lee; I. Leedom; J. M. Le Goff; R. Leiste; M. Lenti; E. Leonardi; J. Lettry; X. Leytens; C. Li; H. T. Li; P. J. Li; X. G. Li; J. Y. Liao; W. T. Lin; Z. Y. Lin; F. L. Linde; B. Lindemann; D. Linnhofer; L. Lista; Y. Liu; W. Lohmann; E. Longo; Y. S. Lu; J. M. Lubbers; K. Lübelsmeyer; C. Luci; D. Luckey; L. Ludovici; L. Luminari; W. Lustermann; J. M. Ma; W. G. Ma; M. MacDermott; P. K. Malhotra; R. Malik; A. Malinin; C. Mãna; D. N. Mao; Y. F. Mao; M. Maolinbay; P. Marchesini; F. Marion; A. Marin; J. P. Martin; L. Martinez-Laso; F. Marzano; G. G. G. Massaro; T Meinholz; K. Mazumdar; P. McBride; T. McMahon; D. McNally; M. Merk; L. Merola; M. Meschini; W. J. Metzger; Y. Mi; G. B. Mills; Y. Mir; G. Mirabelli; J. Mnich; M. Möller; B. Monteleoni; R. Morand; S. Morganti; N. E. Moulai; R. Mount; S. Müller; A. Nadtochy; E. Nagy; M. Napolitano; H. Newman; C. Neyer; M. A. Niaz; A. Nippe; H. Nowak; G. Organtini; D. Pandoulas; S. Paoletti; P. Paolucci; G. Passaleva; S. Patricelli; T. Paul; M. Pauluzzi; F. Pauss; Y. J. Pei; S. Pensotti; D. Perret-Gallix; J. Perrier; A. Pevsner; D. Piccolo; M. Peiri; P. A. Piroué; F. Plasil; V. Plyaskin; M. Pohl; V. Pojidaev; N. Produit; J. M. Qian; K. N. Qureshi; R. Raghavan; G. Rahal-Callot; P. G. Rancoita; M. Rattaggi; G. Raven; P. Razis; K. Read; D. Ren; Z. Ren; M. Rescigno; S. Reucroft; A. Ricker; S. Riemann; W. Riemers; O. Rind; H. A. Rizvi; F. J. Rodriguez; B. P. Roe; M. Röhner; S. Röhner; L. Romero; J. Rose; S. Rosier-Lees; R. Rosmalen; Ph. Rosselet; A. Rubbia; J. A. Rubio; H. Rykaczewski; M. Sachwitz; E. Sajan; J. Salicio; G. S. Sanders; A. Santocchia; M. S. Sarakinos; G. Sartorelli; M. Sassowsky; G. Sauvage; V. Schegelsky; K. Schmiemann; D. Schmitz; P. Schmitz; M. Schneegans; H. Schopper; D. J. Schotanus; S. Shotkin; H. J. Schreiber; J Schwenke; R. Schulte; S. Schulte; K. Schultze; J. Schütte; G. Schwering; C. Sciacca; I. Scott; R. Sehgal; P. G. Seiler; J. C. Sens; L. Servoli; I. Sheer; D. Z. Shen

    1992-01-01

    The polarization of tau leptons produced in e+e- --> tau+tau-(gamma) is measured using a sample of 8977 tau+tau - pairs collected near the peak of the Z0 resonance. A polarization of -0.132+\\/-0.026(stat)+\\/-0.021(syst.) is determined. This corresponds to a ratio of the vector to the axial-vector coupling constants of the tau lepton to the weak neutral current of gVtau\\/gAefftau = 0.067+\\/-0.017.

  7. K0 production in one-prong tau decays

    Microsoft Academic Search

    Damir Buskulic; David William Casper; I. de Bonis; D. Decamp; P. Ghez; C. Goy; J.-P. Lees; M.-N. Minard; P. Odier; B. Pietrzyk; F. Ariztizabal; M. Chmeissani; J. M. Crespo; I. Efthymiopoulos; E. Fernandez; M. Fernandez-Bosman; V. Gaitan; Ll. Garrido; M. Martinez; T S Mattison; S. Orteu; A. Pacheco; C. Padilla; A. Pascual; F. Teubert; D. Creanza; M. de Palma; A. Farilla; Giuseppe Iaselli; G. Maggi; N. Marinelli; S. Natali; S. Nuzzo; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Chai; D. Huang; X. Huang; J. Lin; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; L. Zhang; W. Zhao; E. Blucher; G. Bonvicini; J. Boudreau; P. Comas; P. Coyle; H. Drevermann; Roger W Forty; G. Ganis; C. Gay; M. Girone; R. Hagelberg; J. Harvey; R. Jacobsen; B. Jost; J. Knobloch; Ivan Lehraus; M. Maggi; C. Markou; P. Mato; H. Meinhard; Adolf G Minten; R. Miquel; P. Palazzi; J. R. Pater; J. A. Perlas; P. Perrodo; J.-F. Pusztaszeri; F. Ranjard; Luigi Rolandi; J E Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; F. Sefkow; W. Tejessy; I. R. Tomalin; R. Veenhof; H W Wachsmuth; S R Wasserbaech; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Ziad J Ajaltouni; Maria Bardadin-Otwinowska; A. Barres; C. Boyer; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; F. Podlyski; J. Proriol; F. Saadi; Tom Fearnley; J. B. Hansen; J. D. Hansen; P. H. Hansen; S. D. Johnson; R. Møllerud; B. S. Nilsson; A. Kyriakis; Errietta Simopoulou; I. Siotis; Anna Vayaki; K. Zachariadou; J. Badier; A. Blondel; G R Bonneaud; J. C. Brient; P. Bourdon; G. Fouque; L. Passalacqua; A. Rougé; M. Rumpf; R. Tanaka; M. Verderi; H L Videau; D. J. Candlin; M. I. Parsons; E. Veitch; E. Focardi; L. Moneta; G. Parrini; M. Corden; M C Delfino; C H Georgiopoulos; D. E. Jaffe; D A Levinthal; A. Antonelli; G. Bencivenni; G. Bologna; F. Bossi; P. Campana; G. Capon; F. Cerutti; V. Chiarella; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; M. Pepe-Altarelli; S. Salomone; P. Colrain; I. Ten Have; I. G. Knowles; J. G. Lynch; W J Maitland; W. T. Morton; C. Raine; P. Reeves; J. M. Scarr; K. Smith; M. G. Smith; A. S. Thompson; S. Thorn; R. M. Turnbull; U. Becker; O. Braun; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; A. Putzer; B. Rensch; M. Schmidt; H. Stenzel; K. Tittel; M. Wunsch; R. Beuselinck; David M Binnie; W. Cameron; M. Cattaneo; D. J. Colling; Peter J Dornan; J. F. Hassard; N P Konstantinidis; A. Moutoussi; J. Nash; D. G. Payne; G. San Martin; J. K. Sedgbeer; A. G. Wright; P. Girtler; D. Kuhn; G. Rudolph; R K Vogl; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Keemer; M. Nuttall; A D Patel; Terence Sloan; S. W. Snow; E. P. Whelan; A. Galla; A. M. Greene; K. Kleinknecht; J. Raab; B. Renk; H.-G. Sander; H. Schmidt; S. M. Walther; R. Wanke; B. Wolf; A. M. Bencheikh; C. Benchouk; A. Bonissent; D. Calvet; J. Carr; C A Diaconu; F. Etienne; D. Nicod; P. Payre; L. Roos; D. Rousseau; P. Schwemling; M. Talby; S. Adlung; R W Assmann; C. Bauer; Walter Blum; D. Brown; Paolo Walter Cattaneo; Bernd Dehning; H. Dietl; Friedrich Dydak; M. Frank; A. W. Halley; K. Jakobs; H. Kroha; J. Lauber; G. Lütjens; Gerhard Lutz; W. Männer; H.-G. Moser; R H Richter; J. Schröder; A. S. Schwarz; Ronald Settles; H C J Seywerd; U. Stierlin; U. Stiegler; R. St. Denis; G. Wolf; R. Alemany; J. Boucrot; O. Callot; A. Cordier; M. Davier; L. Duflot; J.-F. Grivaz; Ph. Heusse; P. Janot; D. W. Kim; F R Le Diberder; J. Lefrançois; A.-M. Lutz; G. Musolino; H.-J. Park; M.-H. Schune; J.-J. Veillet; I. Videau; D. Abbaneo; G. Bagliesi; G. Batignani; U. Bottigli; C. Bozzi; G. Calderini; M. Carpinelli; M. A. Ciocci; V. Ciulli; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; F. Forti; A. Giassi; M. A. Giorgi; A. Gregorio; F. Ligabue; A. Lusiani; P. S. Marrocchesi; E. B. Martin; A. Messineo; Fabrizio Palla; G. Rizzo; G. Sanguinetti; P. Spagnolo; Jack Steinberger; Roberto Tenchini; G. Tonelli; G. Triggiani; Andrea Valassi; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; A. P. Betteridge; Y. Gao; M. G. Green; D. L. Johnson; P. V. March; T. Medcalf; Ll. M. Mir; I. S. Quazi; J. A. Strong; V. Bertin; David R Botterill; R. W. Clifft; T. R. Edgecock; S. Haywood; M. Edwards; P. R. Norton; J. C. Thompson; B. Bloch-Devaux; P. Colas; H. Duarte; S. Emery; Witold Kozanecki; E. Lançon; M. C. Lemaire; E. Locci; B. Marx; P. Perez; J. Rander; J.-F. Renardy; A. Rosowsky; A. Roussarie; J.-P. Schuller; J. Schwindling; D. Si Mohand; B. Vallage; R. P. Johnson; A. M. Litke; G. Taylor; J. Wear; A. Beddall; C. N. Booth; S L Cartwright; F. Combley; I. Dawson; A. Koksal; C. Rankin; L. F. Thompson; A. Böhler; S. Brandt; G D Cowan; E. Feigl; Claus Grupen; G. Lutters; J A Minguet-Rodríguez; F. Rivera; P. Saraiva; U. Schäfer; L. Smolik; L. Bosisio

    1994-01-01

    From a sample of about 75000 tau decays identified with the ALEPH detector, K0 production in 1-prong hadronic decays is investigated by tagging the KL0 component in a hadronic calorimeter. Results are given for the final states nutauh-K0 and nutauh-pi0K0 where the h- is separated into pi and K contributions by means of the dE\\/dx measurement in in the central

  8. Correlation measurements in Z-->tau+tau- and the tau neutrino helicity

    Microsoft Academic Search

    D. Buskulic; I. de Bonis; D. Decamp; P. Ghez; C. Goy; J.-P. Lees; M.-N. Minard; B. Pietrzyk; F. Ariztizabal; P. Comas; J. M. Crespo; M. Delfino; I. Efthymiopoulos; E. Fernandez; M. Fernandez-Bosman; V. Gaitan; Ll. Garrido; T. Mattison; A. Pacheco; C. Padilla; A. Pascual; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; N. Marinelli; S. Natali; S. Nuzzo; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Chai; H. Hu; D. Huang; X. Huang; J. Lin; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; L. Zhang; W. Zhao; G. Bonvicini; J. Boudreau; D. Casper; H. Drevermann; R. W. Forty; G. Ganis; C. Gay; M. Girone; R. Hagelberg; J. Harvey; J. Hilgart; R. Jacobsen; B. Jost; J. Knobloch; I. Lehraus; M. Maggi; C. Markou; M. Martinez; P. Mato; H. Meinhard; A. Minten; R. Miquel; H.-G. Moser; P. Palazzi; J. R. Pater; J. A. Perlas; P. Perrodo; J.-F. Pusztaszeri; F. Ranjard; L. Rolandi; J. Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; F. Sefkow; W. Tejessy; I. R. Tomalin; R. Veenhof; H. Wachsmuth; S. Wasserbaech; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Barres; C. Boyer; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; F. Podlyski; J. Proriol; F. Saadi; T. Fearnley; J. B. Hansen; J. D. Hansen; P. H. Hansen; R. Møllerud; B. S. Nilsson; A. Kyriakis; E. Simopoulou; I. Siotis; A. Vayaki; K. Zachariadou; J. Badier; A. Blondel; G. Bonneaud; J. C. Brient; P. Bourdon; G. Fouque; S. Orteu; A. Rougé; M. Rumpf; R. Tanaka; M. Verderi; H. Videau; D. J. Candlin; M. I. Parsons; E. Veitch; E. Focardi; L. Moneta; G. Parrini; M. Corden; C. Georgiopoulos; D. E. Jaffe; D. Levinthal; A. Antonelli; R. Baldini; G. Bencivenni; G. Bologna; F. Bossi; P. Campana; G. Capon; F. Cerutti; V. Chiarella; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; L. Passalacqua; M. Pepe-Altarelli; P. Colrain; I. Ten Have; J. G. Lynch; W. Maitland; W. T. Morton; C. Raine; P. Reeves; J. M. Scarr; K. Smith; M. G. Smith; A. S. Thompson; R. M. Turnbull; B. Brandl; O. Braun; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; Y. Maumary; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; R. Beuselinck; D. M. Binnie; W. Cameron; M. Cattaneo; D. J. Colling; P. J. Dornan; J. F. Hassard; N. M. Lieske; A. Moutoussi; J. Nash; S. Patton; D. G. Payne; M. J. Phillips; G. San Martin; J. K. Sedgbeer; A. G. Wright; P. Girtler; D. Kuhn; G. Rudolph; R. Vogl; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Keemer; M. Nuttall; A. Patel; T. Sloan; S. W. Snow; E. P. Whelan; A. M. Greene; K. Kleinknecht; J. Raab; B. Renk; H.-G. Sander; H. Schmidt; S. M. Walther; R. Wanke; B. Wolf; A. Zimmermann; A. M. Bencheikh; C. Benchouk; A. Bonissent; D. Calvet; J. Carr; P. Coyle; C. Diaconu; J. Drinkard; F. Etienne; D. Nicod; P. Payre; L. Roos; D. Rousseau; P. Schwemling; M. Talby; S. Adlung; R. Assmann; C. Bauer; W. Blum; D. Brown; P. Cattaneo; B. Dehning; H. Dietl; F. Dydak; M. Frank; A. W. Halley; K. Jakobs; J. Lauber; G. Lütjens; G. Lutz; W. Männer; R. Richter; J. Schröder; A. S. Schwarz; R. Settles; H. Seywerd; U. Stierlin; U. Stiegler; R. St. Denis; G. Wolf; R. Alemany; J. Boucrot; O. Callot; A. Cordier; M. Davier; L. Duflot; J.-F. Grivaz; Ph. Heusse; P. Janot; D. W. Kimfn; F. Le Diberder; J. Lefrançois; A.-M. Lutz; M.-H. Schune; J.-J. Veillet; I. Videau; Z. Zhang; D. Abbaneo; G. Bagliesi; G. Batignani; U. Bottigli; C. Bozzi; G. Calderini; M. Carpinelli; M. A. Ciocci; V. Ciulli; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; F. Forti; A. Giassi; M. A. Giorgi; A. Gregorio; F. Ligabue; A. Lusiani; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; F. Palla; G. Rizzo; G. Sanguinetti; P. Spagnolo; J. Steinberger; R. Tenchini; G. Tonelli; G. Triggiani; A. Valassi; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; A. P. Betteridge; Y. Gao; M. G. Green; D. L. Johnson; P. V. March; T. Medcalf; Ll. M. Mir; I. S. Quazi; J. A. Strong; D. R. Botterill; R. W. Clifft; T. R. Edgecock; S. Haywood; P. R. Norton; J. C. Thompson; B. Bloch-Devaux; P. Colas; H. Duarte; S. Emery; W. Kozanecki; E. Lançon; M. C. Lemaire; E. Locci; B. Marx; P. Perez; J. Rander; J.-F. Renardy; A. Rosowsky; A. Roussarie; J.-P. Schuller; J. Schwindling; D. Si Mohand; B. Vallage; R. P. Johnson; A. M. Litke; G. Taylor; J. Wear; W. Babbage; C. N. Booth; C. Buttar; S. Cartwright; F. Combley; I. Dawson; L. F. Thompson; E. Barberio; A. Böhrer; S. Brandt; G. Cowan; C. Grupen; G. Lutters; F. Rivera; U. Schäfer; L. Smolik; L. Bosisio; R. della Marina; G. Giannini; B. Gobbo; L. Pitis; F. Ragusa; L. Bellantoni; W. Chen; J. S. Conway; Z. Feng; D. P. S. Ferguson; J. Grahl; J. L. Harton; O. J. Hayes; J. M. Nachtman; Y. B. Pan; Y. Saadi; M. Schmitt; I. Scott; V. Sharma; Z. H. Shi; J. D. Turk; A. M. Walsh; F. V. Weber

    1994-01-01

    Using data collected with the ALEPH detector at LEP correlations between the decay products of the tau+ and tau- produced in the decay of the Z have been measured. The measurements performed in the decays tau-->pinu and tau-->varrhonu place limits on deviations from the Standard Model. These are given by the parameter zeta with zeta = -1 for the Standard

  9. Search for Tau-Lepton Decays to Seven Or More Pions With BaBar

    SciTech Connect

    Kass, R.; Ter-Antonian, R.; /Ohio State U.; Hast, C.; /SLAC

    2007-11-02

    We report the results of searches for several decay modes of the {tau}-lepton with {ge} 7 pions in the final state using 207 x 10{sup 6} {tau}-pairs collected with the BaBar detector. For the decays with 7 charged pions in the final state we find the following 90% CL upper limits: B({tau}{sup -} {yields} 4{pi}{sup -}3{pi}{sup +}({pi}{sup 0}){nu}{sub {tau}}) < 3.0 x 10{sup -7}, B({tau}{sup -} {yields} 4{pi}{sup -}3{pi}{sup +}{nu}{sub {tau}}) < 4.3 x 10{sup -7} and B({tau}{sup -} {yields}) B({tau}{sup -} {yields} 4{pi}{sup -}3{pi}{sup +}{pi}{sup 0}{nu}{sub {tau}}) < 2.5 x 10{sup -7}. We also search for the decay {tau}{sup -} {yields} 3{pi}{sup -}2{pi}{sup +}2{pi}{sup 0}{nu}{sub {tau}} and report a 90% CL upper limit of < 3.4 x 10{sup -6} for its branching fraction. Finally, we search for the exclusive final state {tau}{sup -} {yields} 2{sigma}{pi}{sup -}{nu}{sub {tau}} and find a 90% CL upper limit for its branching fraction of < 5.4 x 10{sup -7}.

  10. Search for charged Higgs boson decays of the top quark using hadronic tau decays

    Microsoft Academic Search

    F. Abe; H. Akimoto; A. Akopian; M. G. Albrow; S. R. Amendolia; D. Amidei; J. Antos; C. Anway-Wiese; S. Aota; G. Apollinari; T. Asakawa; W. Ashmanskas; M. Atac; P. Auchincloss; F. Azfar; P. Azzi-Bacchetta; N. Bacchetta; W. Badgett; S. Bagdasarov; M. W. Bailey; J. Bao; P. de Barbaro; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; G. Bauer; T. Baumann; F. Bedeschi; S. Behrends; S. Belforte; G. Bellettini; J. Bellinger; D. Benjamin; J. Benlloch; J. Bensinger; D. Benton; A. Beretvas; J. P. Berge; J. Berryhill; S. Bertolucci; A. Bhatti; K. Biery; M. Binkley; D. Bisello; R. E. Blair; C. Blocker; A. Bodek; W. Bokhari; V. Bolognesi; D. Bortoletto; J. Boudreau; L. Breccia; C. Bromberg; N. Bruner; E. Buckley-Geer; H. S. Budd; K. Burkett; G. Busetto; A. Byon-Wagner; K. L. Byrum; J. Cammerata; C. Campagnari; M. Campbell; A. Caner; W. Carithers; D. Carlsmith; A. Castro; D. Cauz; Y. Cen; F. Cervelli; H. Y. Chao; J. Chapman; M.-T. Cheng; G. Chiarelli; T. Chikamatsu; C. N. Chiou; L. Christofek; S. Cihangir; A. G. Clark; M. Cobal; M. Contreras; J. Conway; J. Cooper; M. Cordelli; C. Couyoumtzelis; D. Crane; D. Cronin-Hennessy; R. Culbertson; J. D. Cunningham; T. Daniels; F. Dejongh; S. Delchamps; S. dell'agnello; M. dell'orso; L. Demortier; B. Denby; M. Deninno; P. F. Derwent; T. Devlin; M. Dickson; J. R. Dittmann; S. Donati; J. Done; T. Dorigo; A. Dunn; N. Eddy; K. Einsweiler; J. E. Elias; R. Ely; E. Jr. Engels; D. Errede; S. Errede; Q. Fan; I. Fiori; B. Flaugher; G. W. Foster; M. Franklin; M. Frautschi; J. Freeman; J. Friedman; H. Frisch; T. A. Fuess; Y. Fukui; S. Funaki; G. Gagliardi; S. Galeotti; M. Gallinaro; M. Garcia-Sciveres; A. F. Garfinkel; C. Gay; S. Geer; D. W. Gerdes; P. Giannetti; N. Giokaris; P. Giromini; L. Gladney; D. Glenzinski; M. Gold; J. Gonzalez; A. Gordon; A. T. Goshaw; K. Goulianos; H. Grassmann; L. Groer; C. Grosso-Pilcher; G. Guillian; R. S. Guo; C. Haber; E. Hafen; S. R. Hahn; R. Handler; R. M. Hans; K. Hara; A. D. Hardman; B. Harral; R. M. Harris; S. A. Hauger; J. Hauser; C. Hawk; E. Hayashi; J. Heinrich; K. D. Hoffman; M. Hohlmann; C. Holck; R. Hollebeek; L. Holloway; A. Hölscher; S. Hong; G. Houk; P. Hu; B. T. Huffman; R. Hughes; J. Huston; J. Huth; J. Hylen; H. Ikeda; M. Incagli; J. Incandela; G. Introzzi; J. Iwai; Y. Iwata; H. Jensen; U. Joshi; R. W. Kadel; E. Kajfasz; T. Kamon; T. Kaneko; K. Karr; H. Kasha; Y. Kato; L. Keeble; K. Kelley; R. D. Kennedy; R. Kephart; P. Kesten; D. Kestenbaum; R. M. Keup; H. Keutelian; F. Keyvan; B. Kharadia; B. J. Kim; D. H. Kim; H. S. Kim; S. B. Kim; S. H. Kim; Y. K. Kim; L. Kirsch; P. Koehn; K. Kondo; J. Konigsberg; S. Kopp; K. Kordas; W. Koska; E. Kovacs; W. Kowald; M. Krasberg; J. Kroll; M. Kruse; T. Kuwabara; S. E. Kuhlmann; E. Kuns; A. T. Laasanen; N. Labanca; S. Lammel; J. I. Lamoureux; T. Lecompte; S. Leone; J. D. Lewis; P. Limon; M. Lindgren; T. M. Liss; N. Lockyer; O. Long; C. Loomis; M. Loreti; J. Lu; D. Lucchesi; P. Lukens; S. Lusin; J. Lys; K. Maeshima; A. Maghakian; P. Maksimovic; M. Mangano; J. Mansour; M. Mariotti; J. P. Marriner; A. Martin; J. A. Matthews; R. Mattingly; P. McIntyre; P. Melese; A. Menzione; E. Meschi; S. Metzler; C. Miao; G. Michail; R. Miller; H. Minato; S. Miscetti; M. Mishina; H. Mitsushio; T. Miyamoto; S. Miyashita; Y. Morita; J. Mueller; A. Mukherjee; T. Muller; P. Murat; H. Nakada; I. Nakano; C. Nelson; D. Neuberger; C. Newman-Holmes; M. Ninomiya; L. Nodulman; S. H. Oh; K. E. Ohl; T. Ohmoto; T. Ohsugi; R. Oishi; M. Okabe; T. Okusawa; R. Oliver; J. Olsen; C. Pagliarone; R. Paoletti; V. Papadimitriou; S. P. Pappas; A. Parri; J. Patrick; G. Pauletta; M. Paulini; A. Perazzo; L. Pescara; M. D. Peters; T. J. Phillips; G. Piacentino; M. Pillai; K. T. Pitts; R. Plunkett; L. Pondrom; J. Proudfoot; F. Ptohos; G. Punzi; K. Ragan; A. Ribon; F. Rimondi; L. Ristori; W. J. Robertson; T. Rodrigo; S. Rolli; J. Romano; L. Rosenson; R. Roser; W. K. Sakumoto; D. Saltzberg; A. Sansoni; L. Santi; H. Sato; V. Scarpine; P. Schlabach; E. E. Schmidt; M. P. Schmidt; A. Scribano; S. Segler; S. Seidel; Y. Seiya; G. Sganos; A. Sgolacchia; M. D. Shapiro; N. M. Shaw; Q. Shen; P. F. Shepard; M. Shimojima; M. Shochet; J. Siegrist; A. Sill; P. Sinervo; P. Singh; J. Skarha; K. Sliwa; F. D. Snider; T. Song; J. Spalding; P. Sphicas; F. Spinella; M. Spiropulu; L. Spiegel; L. Stanco; J. Steele; A. Stefanini; K. Strahl; J. Strait; R. Ströhmer; D. Stuart; G. Sullivan; A. Soumarokov; K. Sumorok; J. Suzuki; T. Takada; T. Takahashi; T. Takano; K. Takikawa; N. Tamura; F. Tartarelli; W. Taylor; P. K. Teng; Y. Teramoto; S. Tether; D. Theriot; T. L. Thomas; R. Thun; M. Timko; P. Tipton; A. Titov; S. Tkaczyk; D. Toback; K. Tollefson; A. Tollestrup; J. Tonnison; J. F. de Troconiz; S. Truitt; J. Tseng; N. Turini; T. Uchida; N. Uemura; F. Ukegawa; G. Unal; S. C. Brink; S. Vejcik; G. Velev; R. Vidal; M. Vondracek; D. Vucinic; R. G. Wagner; R. L. Wagner; J. Wahl

    1996-01-01

    We present the result of a search for charged Higgs boson decays of the top quark, produced in pp¯ collisions at &surd;s=1.8 TeV. When the charged Higgs boson is heavy and decays to a tau lepton, which subsequently decays hadronically, the resulting events have a unique signature: large missing transverse energy and the low-charged-multiplicity tau. Data collected in 1992 and

  11. Measurement of the tau- to eta pi-pi+pi-nu tau Branching Fraction and a Search for a Second-Class Current in the tau- to eta'(958)pi-nu tau Decay

    SciTech Connect

    Aubert, B.; Bona, M.; Boutigny, D.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prudent, X.; Tisserand, V.; Zghiche, A.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Lopez, L.; Palano, A.; Pappagallo, M.; /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Abrams, G.S.; Battaglia, M.; Brown, David Nathan; Button-Shafer, J.; /LBL, Berkeley /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /Bristol U. /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /Ferrara U. /Frascati /Genoa U. /Harvard U. /Heidelberg U. /Imperial Coll., London /Iowa U. /Iowa State U. /Johns Hopkins U. /Karlsruhe U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT, LNS /McGill U. /Milan U. /INFN, Milan /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /Naples U. /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /Padua U. /Paris U., VI-VII /Pennsylvania U. /Perugia U. /Pisa U. /Princeton U. /INFN, Rome /Rostock U. /Rutherford /DSM, DAPNIA, Saclay /South Carolina U. /SLAC /Stanford U., Phys. Dept. /SUNY, Albany /Tennessee U. /Texas U. /Texas U., Dallas /Turin U. /INFN, Turin /Trieste U. /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison /Yale U.

    2008-03-24

    The {tau}{sup -} {yields} {eta}{pi}{sup -}{pi}{sup +}{pi}{sup -}{nu}{sub {tau}} decay with the {eta} {yields} {gamma}{gamma} mode is studied using 384 fb{sup -1} of data collected by the BABAR detector. The branching fraction is measured to be (1.60 {+-} 0.05 {+-} 0.11) x 10{sup -4}. It is found that {tau}{sup -} {yields} f{sub 1}(1285){pi}{sup -} {nu}{sub {tau}} {yields} {eta}{pi}{sup -}{pi}{sup +}{pi}{sup -}{nu}{sub {tau}} is the dominant decay mode with a branching fraction of (1.11 {+-} 0.06 {+-} 0.05) x 10{sup -4}. The first error on the branching fractions is statistical and the second systematic. In addition, a 90% confidence level upper limit on the branching fraction of the {tau}{sup -} {yields} {eta}{prime}(958){pi}{sup -}{nu}{sub {tau}} decay is measured to be 7.2 x 10{sup -6}. This last decay proceeds through a second-class current and is expected to be forbidden in the limit of isospin symmetry.

  12. Decay properties of tau leptons measured at the Z0 resonance

    Microsoft Academic Search

    B. Adeva; O. Adriani; M. Aguilar-Benitez; H. Akbari; J. Alcaraz; A. Aloisio; G. Alverson; M. G. Alviggi; G. Ambrosi; Q. An; H. Anderhub; A. L. Anderson; V. P. Andreev; T. Angelov; L. Antonov; D. Antreasyan; P. Arce; A. Arefiev; T. Azemoon; P. V. K. S. Baba; P. Bagnaia; J. A. Bakken; L. Baksay; R. C. Ball; S. Banerjee; J. Bao; R. Barillère; L. Barone; R. Battiston; A. Bay; U. Becker; F. Behner; J. Behrens; S. Beingessner; Gy. L. Bencze; J. Berdugo; P. Berges; B. Bertucci; A. Biland; G. M. Bilei; R. Bizzarri; J. J. Blaising; P. Blömeke; B. Blumenfeld; G. J. Bobbink; M. Bocciolini; R. Bock; A. Böhm; B. Borgia; D. Bourilkov; M. Bourquin; D. Boutigny; B. Bouwens; J. G. Branson; I. C. Brock; F. Bruyant; C. Buisson; A. Bujak; J. D. Burger; J. Busenitz; X. D. Cai; M. Capell; F. Carbonara; M. Caria; F. Carminati; A. M. Cartacci; M. Cerrada; Y. H. Chang; U. K. Chaturvedi; M. Chemarin; A. Chen; C. Chen; G. M. Chen; H. F. Chen; H. S. Chen; M. Chen; W. Y. Chen; G. Chiefari; C. Y. Chien; M. Chmeissani; C. Civinini; I. Clare; R. Clare; H. O. Cohn; G. Coignet; N. Colino; V. Commichau; G. Conforto; A. Contin; F. Crijns; X. Y. Cui; T. S. Dai; R. D'Alessandro; R. de Asmundis; A. Degré; K. Dénes; P. Denes; F. Denotaristefani; M. Dhina; D. Dibitonto; M. Diemoz; H. R. Dimitrov; C. Dionisi; E. Drago; T. Driever; D. Duchesneau; P. Duinker; I. Duran; H. El Mamouni; A. Engler; F. J. Eppling; F. C. Erné; P. Extermann; R. Fabbretti; M. Fabre; S. Falciano; Q. Fan; S. J. Fan; O. Fackler; J. Fay; T. Ferguson; G. Fernandez; F. Ferroni; H. Fesefeldt; E. Fiandrini; J. Field; F. Filthaut; G. Finocchiaro; P. H. Fisher; G. Forconi; T. Foreman; K. Freudenreich; W. Friebel; M. Fukushima; M. Gailloud; Yu. Galaktionov; E. Gallo; S. N. Ganguli; P. Garcia-Abia; S. S. Gau; D. Gele; S. Gentile; M. Glaubman; S. Goldfarb; Z. F. Gong; E. Gonzalez; A. Gordeev; P. Göttlicher; D. Goujon; G. Gratta; C. Grinnell; M. Gruenewald; M. Guanziroli; J. K. Guo; A. Gurtu; H. R. Gustafson; L. J. Gutay; H. Haan; A. Hasan; D. Hauschildt; C. F. He; T. Hebbeker; M. Hebert; G. Herten; U. Herten; A. Hervé; K. Hilgers; H. Hofer; H. Hoorani; L. S. Hsu; G. Hu; B. Ille; M. M. Ilyas; V. Innocente; H. Janssen; S. Jezequel; B. N. Jin; L. W. Jones; A. Kasser; R. A. Khan; Yu. Kamyshkov; Y. Karyotakis; M. Kaur; S. Khokhar; V. Khoze; M. N. Kienzle-Focacci; W. Kinnison; D. Kirkby; W. Kittel; A. Klimentov; A. C. König; O. Kornadt; V. Koutsenko; R. W. Kraemer; T. Kramer; V. R. Krastev; W. Krenz; J. Krizmanic; K. S. Kumar; A. Kunin; V. Lalieu; G. Landi; K. Lanius; D. Lanske; S. Lanzano; P. Lebrun; P. Lecomte; P. Lecoq; P. Le Coultre; D. Lee; I. Leedom; J. M. Le Goff; L. Leistam; R. Leiste; M. Lenti; E. Leonardi; J. Lettry; P. M. Levchenko; X. Leytens; C. Li; H. T. Li; J. F. Li; L. Li; P. J. Li; Q. Li; X. G. Li; J. Y. Liao; Z. Y. Lin; F. L. Linde; B. Lindemann; D. Linnhofer; R. Liu; Y. Liu; W. Lohmann; E. Longo; Y. S. Lu; J. M. Lubbers; K. Lübelsmeyer; C. Luci; D. Luckey; L. Ludovici; L. Luminari; W. G. Ma; M. MacDermott; R. Magahiz; P. K. Malhotra; R. Malik; A. Malinin; C. Maña; D. N. Mao; Y. F. Mao; M. Maolinbay; P. Marchesini; A. Marchionni; J. P. Martin; L. Martinez-Laso; F. Marzano; G. G. G. Massaro; T. Matsuda; K. Mazumdar; P. McBride; T. McMahon; D. McNally; Th. Meinholz; M. Merk; L. Merola; M. Meschini; W. J. Metzger; Y. Mi; G. B. Mills; Y. Mir; G. Mirabelli; J. Mnich; M. Möller; B. Monteleoni; G. Morand; R. Morand; S. Morganti; N. E. Moulai; R. Mount; S. Müller; E. Nagy; M. Napolitano; H. Newman; C. Neyer; M. A. Niaz; L. Niessen; H. Nowak; D. Pandoulas; M. Pauluzzi; F. Pauss; F. Plasil; G. Passaleva; G. Paternoster; S. Patricelli; Y. J. Pei; D. Perret-Gallix; J. Perrier; A. Pevsner; M. Pieri; P. A. Piroué; V. Plyaskin; M. Pohl; V. Pojidaev; N. Produit; J. M. Qian; K. N. Qureshi; R. Raghavan; G. Rahal-Callot; G. Raven; P. Razis; K. Read; D. Ren; Z. Ren; S. Reucroft; A. Ricker; S. Riemann; O. Rind; C. Rippich; H. A. Rizvi; B. P. Roe; M. Röhner; S. Röhner; L. Romero; J. Rose; S. Rosier-Lees; R. Rosmalen; Ph. Rosselet; A. Rubbia; J. A. Rubio; W. Ruckstuhl; H. Rykaczewski; M. Sachwitz; J. Salicio; G. Sanders; A. Santocchia; M. S. Sarakinos; G. Sartorelli; G. Sauvage; A. Savin; V. Schegelsky; K. Schmiemann; D. Schmitz; P. Schmitz; M. Schneegans; H. Schopper; D. J. Schotanus; S. Shotkin; H. J. Schreiber; R. Schulte; S. Schulte; K. Schultze; J. Schütte; J. Schwenke; G. Schwering; C. Sciacca; I. Scott; R. Sehgal; P. G. Seiler; L. Servoli; I. Sheer; D. Z. Shen; V. Shevchenko; S. Shevchenko; X. R. Shi; K. Shmakov; V. Shoutko; E. Shumilov; N. Smirnov; E. Soderstrom; A. Sopczak; C. Spartiotis; T. Spickermann; P. Spillantini; R. Starosta; M. Steuer; D. P. Stickland; F. Sticozzi; W. Stoeffl; H. Stone; K. Strauch; B. C. Stringfellow; K. Sudhakar; G. Sultanov; R. L. Summer; L. Z. Sun; H. Suter; R. B. Sutton; J. D. Swain; A. A. Syed; X. W. Tang; E. Tarkovsky

    1991-01-01

    From 2540 Z0 --> tau+tau- events, we determine the inclusive decay branching fractions of the tau-lepton into one and three charged particles to be 0.856 +\\/- 0.006 (stat.) +\\/- 0.003 (syst.) and 0.144 +\\/- 0.006 (stat.) +\\/- 0.003 (syst.), respectively. The leptonic branching fractions are measured to be 0.175 +\\/- 0.008 (stat.) +\\/- 0.005 (syst.) for tau --> munumunutau and

  13. Measurement of sigma(ppbar->Z) Br(Z->tau+tau-) and search for Higgs bosons decaying to tau+tau- at s**(1/2) = 1.96 TeV

    SciTech Connect

    Galea, Cristina Florina; /Nijmegen U.

    2008-01-01

    The resonant production of tau-lepton pairs is as interesting for the study of Standard Model (SM) physics as the production of lighter leptons pairs. For new phenomena, such as Higgs boson production or in case new particles beyond the SM would arise, the detection of (resonant) pairs of tau leptons becomes much more interesting. This is due to the fact that tau leptons are much heavier than the other leptons, which increases the chance that these new phenomena would be observed first in this channel. Unfortunately their clean detection is far more difficult than that of muons or electrons. The cross section times branching ratio {sigma}{center_dot} Br for the process p{bar p} {yields} Z {yields} {tau}{sup +}{tau}{sup -} was measured at {radical}s = 1.96 GeV using 1.0 fb{sup -1} of data collected by the D0 experiment. This measurement was performed in the channel in which one of the tau leptons decays to a muon and neutrinos, while the other decays either hadronically or to an electron and neutrinos. A set of 1511 events, of which about 20% estimated background, passed all selection criteria. The trigger and muon reconstruction efficiencies, as well as the efficiency for track reconstruction were obtained from data using the 'tag and probe' method on Z {yields} {mu}{sup +}{mu}{sup -} events. The multijet background was estimated from the sample of events which passed all selection criteria but in which the muon and the tau candidate had the same charge. The W {yields} {mu}{nu} + jets background was modeled by Monte Carlo simulations, but normalized to data. All the other backgrounds, as well as the efficiency for Z {yields} {tau}{sup +}{tau}{sup -} events were estimated using simulated events normalized to the theoretical calculations of cross sections at next-to-leading order or next-to-next-to-leading order. The energy of the tau candidates was corrected for the estimated response of the charged pions in the calorimeter, which is of the order 50-80%. Since the charged pion response in data was not well reproduced by the default simulation of hadronic interactions (Geisha), a different simulation (gCALOR) was used to obtain an estimated charged pion response consistent with the one measured in data. This tau energy correction method makes use of the superior resolution of the track momentum measurement compared to the resolution of the tau candidate energy as measured by the calorimeter, which leads to a better data--simulation agreement and a decrease of 10% in the resolution of the visible mass peak. The result of this measurement is {sigma}(p{bar p} {yields} Z) {center_dot} Br(Z {yields} {tau}{sup +}{tau}{sup -}) = 240 {+-} 8(stat) {+-} 12(syst) {+-} 15(lumi) pb, in good agreement with the theoretical predictions of 241.6{sub -3.2}{sup +3.6} pb [79] or 251.9{sub -12}{sup +5.1} pb [93-95], as well as with other measurements performed by the D0 and CDF experiments in all channels in which the Z boson decays leptonically [96-100]. This is the most precise Z boson cross section measurement to date performed in the tau lepton channel at hadron colliders. The analysis demonstrates the ability of the D0 experiment to identify tau leptons decaying hadronically with good efficiency and high purity, a challenging task in p{bar p} collisions where the number of jets resembling tau leptons is very high. This achievement forms a solid basis for other analyses using hadronic tau lepton decays, such as the search for the Higgs boson decaying into tau-lepton pairs, which was performed for the last part of this thesis.

  14. Measurement of the Michel parameters and the average tau-neutrino helicity from tau decays at LEP

    Microsoft Academic Search

    M. Acciarri; O. Adriani; M. Aguilar-Benitez; S P Ahlen; J. Alcaraz; G. Alemanni; James V Allaby; A. Aloisio; M. G. Alviggi; M. G. Alviggi; H. Anderhub; V. P. Andreev; T. Angelescu; F. Anselmo; A. Arefiev; T. Azemoon; T. Azemoon; P. Bagnaia; L. Baksay; R. C. Ball; S. Banerjee; K. Banicz; A. Barczyk; R. Barillère; L. Barone; P. Bartalini; A. Baschirotto; M. Basile; R. Battiston; A. Bay; F. Becattini; U. Becker; F. Behner; J. Berdugo; P. Berges; B. Bertucci; B. Bertucci; S. Bhattacharya; M. Biasini; A. Biland; G. M. Bilei; J. J. Blaising; S. C. Blyth; Gerjan J Bobbink; R K Böck; A. Böhm; L. Boldizsar; B. Borgia; D. Bourilkov; Maurice Bourquin; D. Boutigny; S. Braccini; J. G. Branson; V. Brigljevic; I. C. Brock; A. Buffini; J. D. Burger; W. J. Burger; X. D. Cai; M. Campanelli; M. Campanelli; G. Cara Romeo; G. Cara Romeo; A. M. Cartacci; J. Casaus; G. Castellini; F. Cavallari; N. Cavallo; C. Cecchi; M Cerrada-Canales; F. Cesaroni; M Chamizo-Llatas; Y. H. Chang; U. K. Chaturvedi; M. Chemarin; A. Chen; G. Chen; H. F. Chen; H. S. Chen; M. Chen; G. Chiefari; C. Y. Chien; Luisa Cifarelli; F. Cindolo; C. Civinini; I. Clare; I. Clare; G. Coignet; A. P. Colijn; N. Colino; S. Costantini; F. Cotorobai; B. de la Cruz; Akos Csilling; T. S. Dai; R. D'Alessandro; R. de Asmundis; A. Degré; K. Deiters; P. Denes; F. DeNotaristefani; M. Diemoz; D N Van Dierendonck; F. Di Lodovico; C. Dionisi; Michael Dittmar; A. Dominguez; A. Dominguez; M. T. Dova; E. Drago; D. Duchesneau; P. Duinker; I. Duran; S. Easo; H. El Mamouni; A. Engler; F. J. Eppling; F. C. Erné; Pierre Extermann; M. Fabre; R. Faccini; M. A. Falagan; S. Falciano; A. Favara; J. Fay; O. Fedin; Marta Felcini; T. Ferguson; F. Ferroni; H S Fesefeldt; E. Fiandrini; J. H. Field; Frank Filthaut; P. H. Fisher; I. Fisk; G. Forconi; L. Fredj; Klaus Freudenreich; C. Furetta; Yu. Galaktionov; S. N. Ganguli; P. Garcia-Abia; M. Gataullin; S. S. Gau; S. Gentile; J. Gerald; N. Gheordanescu; S. Giagu; S. Goldfarb; J. Goldstein; Z. F. Gong; Andreas Gougas; Giorgio Gratta; M. W. Gruenewald; R. van Gulik; V. K. Gupta; A. Gurtu; L. J. Gutay; D. Haas; B. Hartmann; A. Hasan; D. Hatzifotiadou; T. Hebbeker; A. Hervé; P. Hidas; J. Hirschfelder; W. C. van Hoek; H. Hofer; H. Hoorani; S. R. Hou; G. Hu; I. Iashvili; B. N. Jin; L. W. Jones; P. de Jong; I. Josa-Mutuberria; A. Kasser; R. A. Khan; D. Kamrad; J. S. Kapustinsky; Yu Karyotakis; M. Kaur; M. N. Kienzle-Focacci; D. Kim; J. K. Kim; S. C. Kim; W. W. Kinnison; A. Kirkby; D. Kirkby; Jasper Kirkby; D. Kiss; W. Kittel; A. Klimentov; A. Klimentov; A. Kopp; I. Korolko; V F Koutsenko; R. W. Kraemer; A. Kunin; P E Lacentre; P. Ladron de Guevara; G. Landi; C. Lapoint; K M Lassila-Perini; P. Laurikainen; A. Lavorato; M. Lebeau; A. Lebedev; P. Lebrun; P. Lecomte; P. Lecomte; P. Le Coultre; H. J. Lee; C. Leggett; J. M. Le Goff; R. Leiste; E. Leonardi; P. Levtchenko; Li Chuan; C. H. Lin; W. T. Lin; Frank L Linde; Z. A. Liu; W. Lohmann; E. Longo; W. Lu; Y. S. Lu; K. Lübelsmeyer; C. Luci; D. Luckey; L. Luminari; W. Lustermann; W. G. Ma; M. Maity; G. Majumder; L. Malgeri; A. Malinin; C. Maña; D J J Mangeol; P A Marchesini; G. Marian; A. Marin; J. P. Martin; F. Marzano; G. G. G. Massaro; K. Mazumdar; S. Mele; L. Merola; M. Meschini; W. J. Metzger; M. von der Mey; Y. Mi; D. Migani; A. Mihul; A. J. W. van Mil; H. Milcent; G. Mirabelli; J. Mnich; P. Molnar; B. Monteleoni; R. Moore; T. Moulik; R. Mount; G. S. Muanza; F. Muheim; A. J. M. Muijs; S. Nahn; M. Napolitano; F. Nessi-Tedaldi; H. Newman; T. Niessen; A. Nippe; A. Nisati; H. Nowak; Yu D Oh; G. Organtini; R. Ostonen; C. Palomares; D. Pandoulas; S. Paoletti; P. Paolucci; H. K. Park; I. H. Park; G. Pascale; G. Passaleva; S. Patricelli; T. Paul; M. Pauluzzi; C. Paus; Felicitas Pauss; D. Peach; M. Pedace; Y. J. Pei; S. Pensotti; D. Perret-Gallix; B. Petersen; S. Petrak; A. Pevsner; D. Piccolo; M. Pieri; P. A. Piroué; E. Pistolesi; V. Plyaskin; M. Pohl; V Pozhidaev; H. Postema; J. Pothier; N. Produit; D. Prokofiev; J. Quartieri; G. Rahal-Callot; N. Raja; P. G. Rancoita; M. Rattaggi; G. Raven; P. Razis; D. Ren; M. Rescigno; S. Reucroft; T. van Rhee; S. Riemann; K. Riles; O. Rind; A. Robohm; J. Rodin; B. P. Roe; L. Romero; S. Rosier-Lees; Ph. Rosselet; S. Roth; J. A. Rubio; D. Ruschmeier; H. Rykaczewski; S. Sakar; J. Salicio; E. Sanchez; M. P. Sanders; M. E. Sarakinos; G. Sauvage; C. Schäfer; V. Schegelsky; S. Schmidt-Kaerst; D. Schmitz; M. Schneegans; N. Scholz; H. Schopper; D. J. Schotanus; D. J. Schotanus; G. Schwering; C. Sciacca; D. Sciarrino; L. Servoli; S. Shevchenko; N. Shivarov; V. Shoutko; J. Shukla; E. Shumilov; A. Shvorob; T. Siedenburg; D. Son; V. Soulimov; B. Smith; P. Spillantini; M. Steuer; D. P. Stickland; H. Stone; B. Stoyanov; A. Straessner; K. Sudhakar; G. Sultanov; L. Z. Sun; G. F. Susinno; H. Suter; J. D. Swain; X. W. Tang; L. Tauscher

    1998-01-01

    Four of the Michel parameters and the average tau-neutrino helicity have been measured by analysing tau decay spectra in 147 pb?1of data collected by the L3 detector. The decays ???e?????e, ??????????, ???????, ??????? and their charge conjugates were considered. The results: ?=0.762±0.035, ?=0.27±0.14, ?=0.70±0.16, ??=0.70±0.11 and ?h=?1.032±0.031 are consistent with a V?A structure for the weak charged current and lepton

  15. Reconstruction and identification of hadronic decays of tau leptons in ATLAS

    E-print Network

    Zinonas Zinonos

    2014-09-01

    Hadronically decaying tau leptons are of prime importance in numerous physics analyses in ATLAS. The spectrum of the possible applications of hadronically decaying tau leptons reaches from Standard Model measurements, including Higgs searches, to searches for physics beyond the Standard Model. The basic principles behind the sophisticated tau reconstruction and identification techniques, which are specifically designed to identify hadronically decaying taus and reject various background processes, are delineated here along with current data-driven estimates of their respective performance.

  16. Measurements of Charged Current Lepton Universality and |V{sub us}| Using Tau Lepton Decays to e{sup -{nu}}{sub e{nu}{tau}}, {mu}{sup -{nu}}{sub {mu}{nu}{tau}}, {pi}{sup -{nu}}{sub {tau},} and K{sup -{nu}}{sub {tau}}

    SciTech Connect

    Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V. [Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France); Garra Tico, J.; Grauges, E. [Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain); Martinelli, M.; Palano, A.; Pappagallo, M. [INFN Sezione di Bari, I-70126 Bari (Italy); Dipartimento di Fisica, Universita di Bari, I-70126 Bari (Italy); Eigen, G.; Stugu, B.; Sun, L. [University of Bergen, Institute of Physics, N-5007 Bergen (Norway); Battaglia, M.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G. [Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

    2010-07-30

    Using 467 fb{sup -1} of e{sup +}e{sup -} annihilation data collected with the BABAR detector, we measure (B({tau}{sup -{yields}}{mu}-{nu}{sub {mu}{nu}{tau}}))/B({tau}{sup -{yields}}e{sup -{nu}}{sub e{nu}{tau}})=(0.9796{+-}0.0016{+-}0.0036), (B({tau}{sup -{yields}}{pi}-{nu}{sub {tau}})/B({tau}{sup -{yields}}e{sup -{nu}}{sub e{nu}{tau}}))=(0.5945{+-}0.0014{+-}0.0061), and (B({tau}{sup -{yields}}K{sup -{nu}}{sub {tau}})/B({tau}{sup -{yields}}e{sup -{nu}}{sub e{nu}{tau}}))=(0.03882{+-}0.00032{+-}0.00057), where the uncertainties are statistical and systematic, respectively. From these precision {tau} measurements, we test the standard model assumption of {mu}-e and {tau}-{mu} charge current lepton universality and provide determinations of |V{sub us}| experimentally independent of the decay of a kaon.

  17. Measurement of Cabibbo-Suppressed Tau Lepton Decays and the Determination of |Vus|

    SciTech Connect

    Schenk, Stefan; /SLAC

    2008-12-16

    This work presents simultaneous branching fraction measurements of the decay modes {tau}{sup -} {yields} K{sup -} n{pi}{sup 0}{nu}{sub {tau}} with n = 0,1,2,3 and {tau}{sup -} {yields} {pi}{sup -} n{pi}{sup 0}{nu}{sub {tau}} with n = 3,4. The analysis is based on a data sample of 427 x 10{sup 6} {tau}{sup +}{tau}{sup -} pairs recorded with the BABAR detector, which corresponds to an integrated luminosity of 464.4 fb{sup -1}. The measured values are {Beta}({tau}{sup -} {yields} K{sup -}{nu}{sub {tau}}) = (6.57 {+-} 0.03 {+-} 0.11) x 10{sup -3}, {Beta}({tau}{sup -} {yields} K{sup -}{pi}{sup 0}{nu}{sub {tau}}) = (4.61 {+-} 0.03 {+-} 0.11) x 10{sup -3}, {Beta}({tau}{sup -} {yields} K{sup -} {pi}{sup 0}{pi}{sup 0}{nu}{sub {tau}}) = (5.05 {+-} 0.17 {+-} 0.44) x 10{sup -4}, {Beta}({tau}{sup -} {yields} K{sup -}{pi}{sup 0}{pi}{sup 0}{pi}{sup 0}{nu}{sub {tau}}) = (1.31 {+-} 0.43 {+-} 0.40) x 10{sup -4}, {Beta}({tau}{sup 0} {yields} {pi}{sup 0}{pi}{sup 0}{pi}{sup 0}{pi}{sup 0}{nu}{sub {tau}}) = (1.263 {+-} 0.008 {+-} 0.078) x 10{sup -2} and {Beta}({tau}{sup 0} {yields} {pi}{sup 0}{pi}{sup 0}{pi}{sup 0}{pi}{sup 0}{pi}{sup 0}{nu}{sub {tau}}) = (9.6 {+-} 0.5 {+-} 1.2) x 10{sup -4}, where the uncertainties are statistical and systematic, respectively. All measurements are compatible with the current world averages whereas the uncertainties are significantly smaller by a factor of up to five. The determination of {Beta}({tau}{sup 0} {yields} {pi}{sup -}{pi}{sup 0}{pi}{sup 0}{pi}{sup 0}{pi}{sup 0}{nu}{sub {tau}}) is the first measurement of this branching fraction. The measured branching fractions are combined with the current world averages. Using the new averages, an updated determination of |V{sub us}| from hadronic {tau} decays yields |V{sub us}| = 0.2146 {+-} 0.0025, which improves previous measurements by 19%. Its uncertainty is comparable to the one of the current world average from semileptonic kaon decays.

  18. Tau Decays to 3h( 0 ) and 5h( 0 ) from CLEO W. T. Ford \\Lambda

    E-print Network

    1 Tau Decays to 3h(� 0 )š and 5h(� 0 )š from CLEO W. T. Ford \\Lambda Department of Physics­ and five­prong tau decays ø ! 3h \\Sigma ; 3h \\Sigma � 0 ; 5h \\Sigma ; 5h \\Sigma � 0 , and have obtainedE=dx information to further improve electron identification. We reconstruct the tau pairs in several topolo­ gies

  19. Search for Rare Multi-Pion Decays of the Tau Lepton Using the BABAR Detector

    SciTech Connect

    Ter-Antonyan, Ruben

    2007-09-18

    A search for the decay of the {tau} lepton to rare multi-pion final states is performed using the BABAR detector at the PEP-II asymmetric-energy e+e- collider. The analysis uses 232 fb-1 of data at center-of-mass energies on or near the {Upsilon}(4S) resonance. In the search for the {tau}- {yields} 3{pi}-2{pi}+2{pi}{sup 0}{nu}{sub {tau}} decay, we observe 10 events with an expected background of 6.5{sup +2.0}{sub -1.4} events. In the absence of a signal, we calculate the decay branching ratio upper limit {beta}({tau}- {yields} 3{pi}-2{pi}+2{pi}{sup 0}{nu}{sub {tau}}) < 3.4 x 10{sup -6} at the 90% confidence level. This is more than a factor of 30 improvement over the previously established limit. In addition, we search for the exclusive decay mode {tau}- {yields} 2{omega}{pi}-{nu}{sub {tau}} with the further decay of {omega} {yields} {pi}-{pi}+{pi}{sup 0}. We observe 1 event, expecting 0.4{sup +1.0}{sub -0.4} background events, and calculate the upper limit {beta}{tau}-{yields} 2{omega}{pi}-{nu}{sub {tau}} < 5.4 x 10{sup -7} at the 90% confidence level. This is the first upper limit for this mode.

  20. Search capability for {eta}{yields}{nu}{sub e,{tau}{nu}e,{tau}}decays in cubic-kilometer neutrino detectors

    SciTech Connect

    Fazely, A. R.; Gunasingha, R. M.; Imlay, R. L.; Muhammad, K. D.; Ter-Antonyan, S. V.; Xu, X. [Southern University, Baton Rouge, Louisiana 70813 (United States)

    2010-06-01

    We investigate the discovery potential of cubic-kilometer neutrino observatories such as IceCube to set stringent limits on the forbidden decays {eta}{yields}{nu}{sub e{nu}e} and {eta}{yields}{nu}{sub {tau}{nu}{tau}.} The signatures for these decays are cascade events resulting from the charged-current reactions of {nu}{sub e}, {nu}{sub {tau},} {nu}{sub e}, and {nu}{sub {tau}}on nuclei in such detectors. Background cascade events are mainly due to {nu}{sub e}'s from atmospheric {mu}, K{sup +}, and K{sub S}{sup 0} decays and to a lesser extent from atmospheric {nu}{sub {mu}}neutral-current interactions with nuclei. A direct upper limit for the branching ratio {eta}{yields}{nu}{sub e,{tau}{nu}e,{tau}}of 6.1x10{sup -4} at 90% CL can be achieved.

  1. Search for doubly charged Higgs bosons with lepton-flavour-violating decays involving tau leptons

    SciTech Connect

    Aaltonen, T.

    2007-12-01

    The authors search for pair production of doubly charged Higgs particles (H{sup {+-}{+-}}) followed by decays into electron-tau (e{tau}) and muon-tau ({mu}{tau}) pairs using a data set corresponding to an integrated luminosity of 350 pb{sup -1} collected from {bar p}p collisions at {radical}s = 1.96 TeV by the CDF II experiment. They search separately for cases where three or four final-state leptons are detected, and then combine the results into limits for each exclusive flavor decay mode of the H{sup {+-}{+-}}. Assuming 100% branching ratios of the H{sup {+-}{+-}} to left-handed e{tau} ({mu}{tau}) pairs, they set an H{sup {+-}{+-}} lower mass limit of 114 (112) GeV/c{sup 2} at the 95% confidence level (C.L.).

  2. Software for physics of tau lepton decay in LHC experiments

    E-print Network

    Tomasz Przedzinski

    2010-09-20

    Software development in high energy physics experiments offers unique experience with rapidly changing environment and variety of different standards and frameworks that software must be adapted to. As such, regular methods of software development are hard to use as they do not take into account how greatly some of these changes influence the whole structure. The following thesis summarizes development of TAUOLA C++ Interface introducing tau decays to new event record standard. Documentation of the program is already published. That is why it is not recalled here again. We focus on the development cycle and methodology used in the project, starting from the definition of the expectations through planning and designing the abstract model and concluding with the implementation. In the last part of the paper we present installation of the software within different experiments surrounding Large Hadron Collider and the problems that emerged during this process.

  3. Search for Lepton Flavor Violation in the Decay tau±-->mu±gamma

    Microsoft Academic Search

    B. Aubert; R. Barate; D. Boutigny; F. Couderc; Y. Karyotakis; J. P. Lees; V. Poireau; V. Tisserand; A. Zghiche; E. Grauges-Pous; A. Palano; A. Pompili; J. C. Chen; N. D. Qi; G. Rong; P. Wang; Y. S. Zhu; G. Eigen; I. Ofte; B. Stugu; G. S. Abrams; A. W. Borgland; A. B. Breon; D. N. Brown; J. Button-Shafer; R. N. Cahn; E. Charles; C. T. Day; M. S. Gill; A. V. Gritsan; Y. Groysman; R. G. Jacobsen; R. W. Kadel; J. Kadyk; L. T. Kerth; Yu. G. Kolomensky; G. Kukartsev; G. Lynch; L. M. Mir; P. J. Oddone; T. J. Orimoto; M. Pripstein; N. A. Roe; M. T. Ronan; W. A. Wenzel; M. Barrett; K. E. Ford; T. J. Harrison; A. J. Hart; C. M. Hawkes; S. E. Morgan; A. T. Watson; M. Fritsch; K. Goetzen; T. Held; H. Koch; B. Lewandowski; M. Pelizaeus; K. Peters; T. Schroeder; M. Steinke; J. T. Boyd; J. P. Burke; N. Chevalier; W. N. Cottingham; M. P. Kelly; T. E. Latham; F. F. Wilson; T. Cuhadar-Donszelmann; C. Hearty; N. S. Knecht; T. S. Mattison; J. A. McKenna; D. Thiessen; A. Khan; P. Kyberd; L. Teodorescu; A. E. Blinov; V. E. Blinov; V. P. Druzhinin; V. B. Golubev; V. N. Ivanchenko; E. A. Kravchenko; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; E. P. Solodov; A. N. Yushkov; D. Best; M. Bruinsma; M. Chao; I. Eschrich; D. Kirkby; A. J. Lankford; M. Mandelkern; R. K. Mommsen; W. Roethel; D. P. Stoker; C. Buchanan; B. L. Hartfiel; A. J. Weinstein; S. D. Foulkes; J. W. Gary; O. Long; B. C. Shen; K. Wang; D. del Re; H. K. Hadavand; E. J. Hill; D. B. Macfarlane; H. P. Paar; Sh. Rahatlou; V. Sharma; J. W. Berryhill; C. Campagnari; A. Cunha; B. Dahmes; T. M. Hong; A. Lu; M. A. Mazur; J. D. Richman; W. Verkerke; T. W. Beck; A. M. Eisner; C. J. Flacco; C. A. Heusch; J. Kroseberg; W. S. Lockman; G. Nesom; T. Schalk; B. A. Schumm; A. Seiden; P. Spradlin; D. C. Williams; M. G. Wilson; J. Albert; E. Chen; G. P. Dubois-Felsmann; A. Dvoretskii; D. G. Hitlin; I. Narsky; T. Piatenko; F. C. Porter; A. Ryd; A. Samuel; S. Yang; S. Jayatilleke; G. Mancinelli; B. T. Meadows; M. D. Sokoloff; F. Blanc; P. Bloom; S. Chen; W. T. Ford; U. Nauenberg; A. Olivas; P. Rankin; W. O. Ruddick; J. G. Smith; K. A. Ulmer; J. Zhang; L. Zhang; A. Chen; E. A. Eckhart; J. L. Harton; A. Soffer; W. H. Toki; R. J. Wilson; Q. Zeng; B. Spaan; D. Altenburg; T. Brandt; J. Brose; M. Dickopp; E. Feltresi; A. Hauke; H. M. Lacker; E. Maly; R. Nogowski; S. Otto; A. Petzold; G. Schott; J. Schubert; K. R. Schubert; R. Schwierz; J. E. Sundermann; D. Bernard; G. R. Bonneaud; P. Grenier; S. Schrenk; Ch. Thiebaux; G. Vasileiadis; M. Verderi; D. J. Bard; P. J. Clark; F. Muheim; S. Playfer; Y. Xie; M. Andreotti; V. Azzolini; D. Bettoni; C. Bozzi; R. Calabrese; G. Cibinetto; E. Luppi; M. Negrini; L. Piemontese; A. Sarti; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; G. Finocchiaro; P. Patteri; I. M. Peruzzi; M. Piccolo; A. Zallo; A. Buzzo; R. Capra; R. Contri; G. Crosetti; M. Lo Vetere; M. Macri; M. R. Monge; S. Passaggio; C. Patrignani; E. Robutti; A. Santroni; S. Tosi; S. Bailey; G. Brandenburg; K. S. Chaisanguanthum; M. Morii; E. Won; R. S. Dubitzky; U. Langenegger; J. Marks; U. Uwer; W. Bhimji; D. A. Bowerman; P. D. Dauncey; U. Egede; J. R. Gaillard; G. W. Morton; J. A. Nash; M. B. Nikolich; G. P. Taylor; M. J. Charles; G. J. Grenier; U. Mallik; A. K. Mohapatra; J. Cochran; H. B. Crawley; J. Lamsa; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; J. Yi; N. Arnaud; M. Davier; X. Giroux; G. Grosdidier; A. Höcker; F. Le Diberder; V. Lepeltier; A. M. Lutz; T. C. Petersen; M. Pierini; S. Plaszczynski; M. H. Schune; G. Wormser; C. H. Cheng; D. J. Lange; M. C. Simani; D. M. Wright; A. J. Bevan; C. A. Chavez; J. P. Coleman; I. J. Forster; J. R. Fry; E. Gabathuler; R. Gamet; D. E. Hutchcroft; R. J. Parry; D. J. Payne; C. Touramanis; C. M. Cormack; F. di Lodovico; C. L. Brown; G. Cowan; R. L. Flack; H. U. Flaecher; M. G. Green; P. S. Jackson; T. R. McMahon; S. Ricciardi; F. Salvatore; M. A. Winter; C. L. Davis; J. Allison; N. R. Barlow; R. J. Barlow; M. C. Hodgkinson; G. D. Lafferty; M. T. Naisbit; J. C. Williams; C. Chen; A. Farbin; W. D. Hulsbergen; A. Jawahery; D. Kovalskyi; C. K. Lae; V. Lillard; D. A. Roberts; G. Blaylock; C. Dallapiccola; S. S. Hertzbach; R. Kofler; V. B. Koptchev; T. B. Moore; S. Saremi; H. Staengle; S. Willocq; R. Cowan; K. Koeneke; G. Sciolla; S. J. Sekula; F. Taylor; R. K. Yamamoto; P. M. Patel; S. H. Robertson; A. Lazzaro; V. Lombardo; F. Palombo; J. M. Bauer; L. Cremaldi; V. Eschenburg; R. Godang; R. Kroeger; J. Reidy; D. A. Sanders; D. J. Summers; H. W. Zhao; S. Brunet; D. Côté; P. Taras; H. Nicholson; N. Cavallo; F. Fabozzi; C. Gatto; L. Lista; D. Monorchio; P. Paolucci; D. Piccolo; C. Sciacca; M. Baak; H. Bulten; G. Raven; H. L. Snoek; L. Wilden; C. P. Jessop; J. M. Losecco; T. Allmendinger; G. Benelli; K. K. Gan; K. Honscheid; D. Hufnagel; H. Kagan; R. Kass; T. Pulliam; A. M. Rahimi

    2005-01-01

    A search for the nonconservation of lepton flavor number in the decay tau±-->mu±gamma has been performed using 2.07×108 e+e--->tau+tau- events produced at a center-of-mass energy near 10.58 GeV with the BABAR detector at the PEP-II storage ring. We find no evidence for a signal and set an upper limit on the branching ratio of B(tau±-->mu±gamma)<6.8×10-8 at 90% confidence level.

  4. Search for Lepton Flavor Violation in the Decay tau -> electron gamma

    SciTech Connect

    Aubert, B.; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Tisserand, V.; Zghiche, A.; /Annecy, LAPP; Grauges, E.; /Barcelona, IFAE; Palano, A.; Pappagallo, M.; Pompili, A.; /Bari U. /INFN, Bari; Chen, J.C.; Qi, N.D.; Rong, G.; Wang, P.; Zhu, Y.S.; /Beijing, Inst. High Energy Phys.; Eigen, G.; Ofte, I.; Stugu, B. /Bergen U. /LBL, Berkeley /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /Bristol U. /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San

    2005-08-26

    A search for the non-conservation of lepton flavor in the decay {tau}{sup {+-}} {yields} e{sup {+-}}{gamma} has been performed with 2.07 x 10{sup 8} e{sup +}e{sup -} {yields} {tau}{sup +}{tau}{sup -} events collected by the BABAR detector at the PEP-II storage ring at a center-of-mass energy near 10.58 GeV. They find no evidence for a signal and set an upper limit on the branching ratio of {Beta}({tau}{sup {+-}} {yields} e{sup {+-}}{gamma}) < 1.1 x 10{sup -7} at 90% confidence level.

  5. Search for lepton flavor violation in the decay tau+/- --> mu+ gamma.

    PubMed

    Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A; Grauges-Pous, E; Palano, A; Pompili, A; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S; Eigen, G; Ofte, I; Stugu, B; Abrams, G S; Borgland, A W; Breon, A B; Brown, D N; Button-Shafer, J; Cahn, R N; Charles, E; Day, C T; Gill, M S; Gritsan, A V; Groysman, Y; Jacobsen, R G; Kadel, R W; Kadyk, J; Kerth, L T; Kolomensky, Yu G; Kukartsev, G; Lynch, G; Mir, L M; Oddone, P J; Orimoto, T J; Pripstein, M; Roe, N A; Ronan, M T; Wenzel, W A; Barrett, M; Ford, K E; Harrison, T J; Hart, A J; Hawkes, C M; Morgan, S E; Watson, A T; Fritsch, M; Goetzen, K; Held, T; Koch, H; Lewandowski, B; Pelizaeus, M; Peters, K; Schroeder, T; Steinke, M; Boyd, J T; Burke, J P; Chevalier, N; Cottingham, W N; Kelly, M P; Latham, T E; Wilson, F F; Cuhadar-Donszelmann, T; Hearty, C; Knecht, N S; Mattison, T S; McKenna, J A; Thiessen, D; Khan, A; Kyberd, P; Teodorescu, L; Blinov, A E; Blinov, V E; Druzhinin, V P; Golubev, V B; Ivanchenko, V N; Kravchenko, E A; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Solodov, E P; Yushkov, A N; Best, D; Bruinsma, M; Chao, M; Eschrich, I; Kirkby, D; Lankford, A J; Mandelkern, M; Mommsen, R K; Roethel, W; Stoker, D P; Buchanan, C; Hartfiel, B L; Weinstein, A J R; Foulkes, S D; Gary, J W; Long, O; Shen, B C; Wang, K; Del Re, D; Hadavand, H K; Hill, E J; MacFarlane, D B; Paar, H P; Rahatlou, Sh; Sharma, V; Berryhill, J W; Campagnari, C; Cunha, A; Dahmes, B; Hong, T M; Lu, A; Mazur, M A; Richman, J D; Verkerke, W; Beck, T W; Eisner, A M; Flacco, C J; Heusch, C A; Kroseberg, J; Lockman, W S; Nesom, G; Schalk, T; Schumm, B A; Seiden, A; Spradlin, P; Williams, D C; Wilson, M G; Albert, J; Chen, E; Dubois-Felsmann, G P; Dvoretskii, A; Hitlin, D G; Narsky, I; Piatenko, T; Porter, F C; Ryd, A; Samuel, A; Yang, S; Jayatilleke, S; Mancinelli, G; Meadows, B T; Sokoloff, M D; Blanc, F; Bloom, P; Chen, S; Ford, W T; Nauenberg, U; Olivas, A; Rankin, P; Ruddick, W O; Smith, J G; Ulmer, K A; Zhang, J; Zhang, L; Chen, A; Eckhart, E A; Harton, J L; Soffer, A; Toki, W H; Wilson, R J; Zeng, Q; Spaan, B; Altenburg, D; Brandt, T; Brose, J; Dickopp, M; Feltresi, E; Hauke, A; Lacker, H M; Maly, E; Nogowski, R; Otto, S; Petzold, A; Schott, G; Schubert, J; Schubert, K R; Schwierz, R; Sundermann, J E; Bernard, D; Bonneaud, G R; Grenier, P; Schrenk, S; Thiebaux, Ch; Vasileiadis, G; Verderi, M; Bard, D J; Clark, P J; Muheim, F; Playfer, S; Xie, Y; Andreotti, M; Azzolini, V; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Luppi, E; Negrini, M; Piemontese, L; Sarti, A; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Patteri, P; Peruzzi, I M; Piccolo, M; Zallo, A; Buzzo, A; Capra, R; Contri, R; Crosetti, G; Lo Vetere, M; Macri, M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Bailey, S; Brandenburg, G; Chaisanguanthum, K S; Morii, M; Won, E; Dubitzky, R S; Langenegger, U; Marks, J; Uwer, U; Bhimji, W; Bowerman, D A; Dauncey, P D; Egede, U; Gaillard, J R; Morton, G W; Nash, J A; Nikolich, M B; Taylor, G P; Charles, M J; Grenier, G J; Mallik, U; Mohapatra, A K; Cochran, J; Crawley, H B; Lamsa, J; Meyer, W T; Prell, S; Rosenberg, E I; Rubin, A E; Yi, J; Arnaud, N; Davier, M; Giroux, X; Grosdidier, G; Höcker, A; Le Diberder, F; Lepeltier, V; Lutz, A M; Petersen, T C; Pierini, M; Plaszczynski, S; Schune, M H; Wormser, G; Cheng, C H; Lange, D J; Simani, M C; Wright, D M; Bevan, A J; Chavez, C A; Coleman, J P; Forster, I J; Fry, J R; Gabathuler, E; Gamet, R; Hutchcroft, D E; Parry, R J; Payne, D J; Touramanis, C; Cormack, C M; Di Lodovico, F; Brown, C L; Cowan, G; Flack, R L; Flaecher, H U; Green, M G; Jackson, P S; McMahon, T R; Ricciardi, S; Salvatore, F; Winter, M A; Brown, D; Davis, C L; Allison, J; Barlow, N R; Barlow, R J; Hodgkinson, M C; Lafferty, G D; Naisbit, M T; Williams, J C; Chen, C; Farbin, A; Hulsbergen, W D; Jawahery, A; Kovalskyi, D; Lae, C K; Lillard, V; Roberts, D A; Blaylock, G; Dallapiccola, C; Hertzbach, S S; Kofler, R; Koptchev, V B; Moore, T B; Saremi, S; Staengle, H; Willocq, S; Cowan, R; Koeneke, K; Sciolla, G; Sekula, S J; Taylor, F; Yamamoto, R K; Patel, P M; Robertson, S H; Lazzaro, A; Lombardo, V; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Godang, R; Kroeger, R; Reidy, J; Sanders, D A; Summers, D J; Zhao, H W; Brunet, S; Côté, D; Taras, P; Nicholson, H; Cavallo, N; Fabozzi, F; Gatto, C; Lista, L; Monorchio, D; Paolucci, P; Piccolo, D; Sciacca, C; Baak, M; Bulten, H; Raven, G; Snoek, H L; Wilden, L; Jessop, C P; LoSecco, J M; Allmendinger, T; Benelli, G; Gan, K K; Honscheid, K; Hufnagel, D; Kagan, H; Kass, R; Pulliam, T; Rahimi, A M; Ter-Antonyan, R; Wong, Q K; Brau, J; Frey, R; Igonkina, O; Lu, M; Potter, C T; Sinev, N B; Strom, D; Torrence, E; Colecchia, F; Dorigo, A; Galeazzi, F; Margoni, M; Morandin, M

    2005-07-22

    A search for the nonconservation of lepton flavor number in the decay tau(+/-) --> mu(+/-) has been performed using 2.07 x 10(8) e(+ )e(-) tau(+) tau(-) events produced at a center-of-mass energy near 10.58 GeV with the BABAR detector at the PEP-II storage ring. We find no evidence for a signal and set an upper limit on the branching ratio of Beta(tau(+/-) --> mu(+/-) gamma) < 6.8 x 10(-8) at 90% confidence level. PMID:16090796

  6. Measurements of the decays tau--->h-h+h-nutau and tau--->h-h+hpi0nutau

    Microsoft Academic Search

    R. Balest; K. Cho; W. T. Ford; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; M. Dickson; P. S. Drell; D. J. Dumas; R. Ehrlich; R. Elia; P. Gaidarev; M. Garcia-Sciveres; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; S. Henderson; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; T. Lee; Y. Liu; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; A. Soffer; P. Avery; A. Freyberger; K. Lingel; C. Prescott; J. Rodriguez; S. Yang; J. Yelton; G. Brandenburg; D. Cinabro; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; K. W. McLean; M. Ogg; A. Bellerive; D. I. Britton; E. R. Hyatt; R. Janicek; D. B. Macfarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; S. Kotov; I. Kravchenko; N. Kwak; Y. Kubota; M. Lattery; M. Momayezi; J. K. Nelson; S. Patton; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; Z. Ling; A. H. Mahmood; J. J. O'neill; H. Severini; C. R. Sun; F. Wappler; G. Crawford; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; M. Sung; C. White; A. Wolf; M. M. Zoeller; X. Fu; B. Nemati; W. R. Ross; P. Skubic; M. Wood; M. Bishai; J. Fast; E. Gerndt; J. W. Hinson; T. Miao; D. H. Miller; M. Modesitt; E. I. Shibata; I. P. Shipsey; P. N. Wang; L. Gibbons; S. D. Johnson; Y. Kwon; S. Roberts; E. H. Thorndike; T. E. Coan; J. Dominick; V. Fadeyev; I. Korolkov; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; M. Artuso; M. Gao; M. Goldberg; D. He; N. Horwitz; S. Kopp; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; S. Stone; X. Xing; J. Bartelt; S. E. Csorna; V. Jain; S. Marka; D. Gibaut; K. Kinoshita; P. Pomianowski; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'grady; J. Urheim; A. J. Weinstein; F. Würthwein; D. M. Asner; M. Athanas; D. W. Bliss; W. S. Brower; G. Masek; H. P. Paar; J. Gronberg; C. M. Korte; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. Roberts; A. Ryd; H. Tajima; M. S. Witherell

    1995-01-01

    We use a data sample of 2.8×106 produced tau-pair events, obtained with the CLEO II detector, to measure B(tau--->h-h+h-(pi0)nutau), where h refers to either a charged pi or K. These branching fractions are measured with samples of lepton-tagged and 3 vs 3 events. We find B(tau--->h-h+h-nutau)=0.0951+\\/-0.0007 m*0.0020 and B(tau--->h-h+h-pi0nutau)=0.0423+\\/- .0006+\\/-0.0022. We also measure B(tau--->omegah-nutau)=0.0195+\\/-0.0007+\\/-0.0011

  7. High-Statistics Study of the tau^- -> pi^- pi^0 nu_tau Decay

    E-print Network

    M. Fujikawa; H. Hayashii; S. Eidelman; for the Belle Collaboration

    2008-10-29

    We report a high-statistics measurement of the branching fraction for tau^- --> pi^- pi^0 nu_tau and the invariant mass spectrum of the produced pi^- pi^0 system using 72.2 fb^-1 of data recorded with the Belle detector at the KEKB asymmetric-energy e^+ e^- collider. The branching fraction obtained is (25.24 +/- 0.01 +/- 0.39)%, where the first error is statistical and the second is systematic. The unfolded pi^- pi^0 mass spectrum is used to determine resonance parameters for the rho(770), rho'(1450), and rho"(1700) mesons. We also use this spectrum to estimate the hadronic (2pi) contribution to the anomalous magnetic moment of the muon (a_{mu}^{pipi}). Our result for a_{mu}^{pipi} integrated over the mass range sqrt{s} = 2m_{pi} - 1.8 GeV/c^2 is a_{mu}^{pipi} = (523.5 +/- 1.5 (exp) +/- 2.6 (Br) +/- 2.5 (isospin))x 10^{-10}, where the first error is due to the experimental uncertainties, the second is due to the uncertainties in the branching fractions and the third is due to the uncertainties in the isospin-violating corrections.

  8. Studies of the Strange Hadronic Tau Decay Tau- to K0(S) Pi- Nu-Tau Using the BaBar Detector

    SciTech Connect

    Lyon, Andrew J.; /Manchester U. /SLAC

    2006-01-27

    A study of the decay {tau}{sup -} {yields} K{sub S}{sup 0}{pi}{sup -} {nu}{sub {tau}} (K{sub S}{sup 0} {yields} {pi}{sup +}{pi}{sup -}) using the BABAR detector is presented. Using 124.4 fb{sup -1} of data we measure {Beta}({tau}{sup -} {yields} {bar K}{sup 0}{pi}{sup -}{nu}{sub {tau}}) = (0.830 {+-} 0.005(stat) {+-} 0.042(syst))%, which is the world's most precise measurement to date of this branching ratio, and is consistent with the current world average. This preliminary result, unlike most of the {Beta}({tau}{sup -} {yields} {bar K}{sup 0}{pi}{sup -}{nu}{sub {tau}}) measurements already published, is systematics dominated and so the biggest future improvement to this number should come from reducing the systematic uncertainties in the analysis. A study of the K{pi} mass spectrum, from which the strange (K{pi}) spectral function can be measured, reveals excess contributions above the K*(892) tail at higher K{pi} mass. While in the past this has been thought to be due to K*(892) - K*(1410) interference, we find that the K*(1410), whose branching ratio to K{pi} is approximately 7%, seems insufficient to explain the excess mass observed in the data. Instead, we perform a fit using a K*(892) - K*(1680) interference model and find better agreement. The discrepancy that remains could be due to an s-wave contribution to the interference that is not parameterized in the model used, and/or detector smearing that is not accounted for in our fit. We also attempt to find an s-wave contribution to the K{pi} mass spectrum by searching for an sp-interference effect. While we find a hint that such an effect exists, we have neither the confidence in the statistics nor systematics in the higher K{pi} mass region to announce an observation. We conclude that it would be a worthwhile study to pursue.

  9. Developmental regulation of tau phosphorylation, tau kinases, and tau phosphatases

    PubMed Central

    Yu, Yang; Run, Xiaoqin; Liang, Zhihou; Li, Yi; Liu, Fei; Liu, Ying; Iqbal, Khalid; Grundke-Iqbal, Inge; Gong, Cheng-Xin

    2009-01-01

    Tau is a neuronal microtubule-associated protein. Its hyperphosphorylation plays a critical role in Alzheimer disease (AD). Expression and phosphorylation of tau are regulated developmentally, but its dynamic regulation and the responsible kinases or phosphatases remain elusive. Here, we studied the developmental regulation of tau in rats during development from embryonic day 15 through the age of 24 months. We found that tau expression increased sharply during the embryonic stage and then became relatively stable, whereas tau phosphorylation was much higher in developing brain than in mature brain. However, the extent of tau phosphorylation at seven of the 14 sites studied was much less in developing brain than in AD brain. Tau phosphorylation during development matched the period of active neurite outgrowth in general. Tau phosphorylation at various sites had different topographic distributions. Several tau kinases appeared to regulate tau phosphorylation collectively at overlapping sites, and the decrease of overall tau phosphorylation in adult brain might be due to the higher levels of tau phosphatases in mature brain. These studies provide new insight into the developmental regulation of site-specific tau phosphorylation and identify the likely sites required for the abnormal hyperphosphorylation of tau in AD. PMID:19183272

  10. Limit on tau neutrino mass

    SciTech Connect

    Abachi, S.; Akerlof, C.; Baringer, P.; Beltrami, I.; Blockus, D.; Bonvicini, G.; Brabson, B.; Bylsma, B.G.; Chapman, J.; Cork, B.

    1986-01-01

    Using the complete data sample of 300 pb/sup -1/ collected by the HRS spectrometer in e/sup +/e/sup -/ collisions at 29 GeV, mass limit for the tau neutrino is set. The end point of the hadronic mass spectrum is determined in the decays tau ..-->.. 5..pi../sup + -/nu/sub tau/ and tau ..-->.. 5..pi../sup + -/..pi../sup 0/nu/sub tau/. At 95% confidence level, an upper limit of M/sub nu/sub tau// < 76 MeV/c/sup 2/, is found. 8 refs., 4 figs.

  11. Tau polarization effects in the CNGS tau-neutrino appearance experiments

    E-print Network

    Mayumi Aoki; Kaoru Hagiwara; Kentarou Mawatari; Hiroshi Yokoya

    2006-11-20

    We studied tau polarization effects on the decay distributions of tau produced in the CNGS tau-neutrino appearance experiments. We show that energy and angular distributions for the decay products in the laboratory frame are significantly affected by the tau polarization. Rather strong azimuthal asymmetry about the tau momentum axis is predicted, which may have observable consequences in experiments even with small statistics.

  12. Search for Doubly Charged Higgs Bosons with Lepton-Flavor-Violating Decays Involving tau Leptons

    Microsoft Academic Search

    T. Aaltonen; J. Adelman; T. Akimoto; Michael G. Albrow; B. Álvarez González; S. Amerio; Dante E. Amidei; A. Anastassov; Alberto Annovi; J. Antos; Masaharu Aoki; G. Apollinari; A. Apresyan; T. Arisawa; A. Artikov; W. Ashmanskas; A. Attal; A. Aurisano; F. Azfar; P. Azzi-Bacchetta; P. Azzurri; N. Bacchetta; W. Badgett; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; S. Baroiant; V. Bartsch; G. Bauer; P.-H. Beauchemin; F. Bedeschi; P. Bednar; S. Behari; G. Bellettini; J. Bellinger; A. Belloni; D. Benjamin; A. Beretvas; J. Beringer; T. Berry; A. Bhatti; M. Binkley; D. Bisello; I. Bizjak; R. E. Blair; C. Blocker; B. Blumenfeld; A. Bocci; A. Bodek; V. Boisvert; G. Bolla; A. Bolshov; D. Bortoletto; J. Boudreau; A. Bridgeman; B. Brau; L. Brigliadori; C. Bromberg; E. Brubaker; J. Budagov; H. S. Budd; S. Budd; K. Burkett; G. Busetto; P. Bussey; A. Buzatu; K. L. Byrum; S. Cabrera; M. Campanelli; M. Campbell; F. Canelli; A. Canepa; D. Carlsmith; R. Carosi; S. Carrillo; S. Carron; B. Casal; M. Cavalli-Sforza; A. Castro; P. Catastini; D. Cauz; A. Cerri; L. Cerrito; S. H. Chang; Y. C. Chen; M. Chertok; G. Choudalakis; G. Chlachidze; F. Chlebana; K. Cho; D. Chokheli; J. P. Chou; S. H. Chuang; K. Chung; W. H. Chung; Y. S. Chung; C. I. Ciobanu; M. A. Ciocci; A. Clark; D. Clark; G. Compostella; M. E. Convery; J. Conway; B. Cooper; K. Copic; M. Cordelli; G. Cortiana; F. Crescioli; C. Cuenca Almenar; J. Cuevas; R. Culbertson; J. C. Cully; D. Dagenhart; M. Datta; T. Davies; P. de Barbaro; S. de Cecco; A. Deisher; G. de Lentdecker; G. de Lorenzo; M. Dell'Orso; L. Demortier; J. Deng; M. Deninno; D. de Pedis; P. F. Derwent; G. P. di Giovanni; C. Dionisi; B. di Ruzza; J. R. Dittmann; M. D'Onofrio; S. Donati; P. Dong; J. Donini; T. Dorigo; S. Dube; J. Efron; R. Erbacher; D. Errede; S. Errede; R. Eusebi; H. C. Fang; S. Farrington; W. T. Fedorko; R. G. Feild; M. Feindt; J. P. Fernandez; C. Ferrazza; R. Field; G. Flanagan; R. Forrest; S. Forrester; M. Franklin; J. C. Freeman; I. Furic; M. Gallinaro; J. Galyardt; F. Garberson; J. E. Garcia; A. F. Garfinkel; K. Genser; H. Gerberich; D. Gerdes; S. Giagu; V. Giakoumopolou; P. Giannetti; K. Gibson; J. L. Gimmell; C. M. Ginsburg; N. Giokaris; M. Giordani; P. Giromini; M. Giunta; V. Glagolev; D. Glenzinski; M. Gold; N. Goldschmidt; A. Golossanov; G. Gomez; G. Gomez-Ceballos; M. Goncharov; O. González; I. Gorelov; A. T. Goshaw; K. Goulianos; A. Gresele; S. Grinstein; C. Grosso-Pilcher; U. Grundler; J. Guimaraes da Costa; Z. Gunay-Unalan; C. Haber; K. Hahn; S. R. Hahn; E. Halkiadakis; B.-Y. Han; J. Y. Han; R. Handler; F. Happacher; K. Hara; D. Hare; M. Hare; S. Harper; R. F. Harr; R. M. Harris; M. Hartz; K. Hatakeyama; J. Hauser; C. Hays; M. Heck; A. Heijboer; B. Heinemann; J. Heinrich; C. Henderson; M. Herndon; J. Heuser; S. Hewamanage; D. Hidas; C. S. Hill; D. Hirschbuehl; A. Hocker; S. Hou; M. Houlden; S.-C. Hsu; B. T. Huffman; R. E. Hughes; U. Husemann; J. Huston; J. Incandela; G. Introzzi; M. Iori; A. Ivanov; B. Iyutin; E. James; B. Jayatilaka; D. Jeans; E. J. Jeon; S. Jindariani; W. Johnson; M. Jones; K. K. Joo; S. Y. Jun; J. E. Jung; T. R. Junk; T. Kamon; D. Kar; P. E. Karchin; Y. Kato; R. Kephart; U. Kerzel; V. Khotilovich; B. Kilminster; D. H. Kim; H. S. Kim; J. E. Kim; M. J. Kim; S. B. Kim; S. H. Kim; Y. K. Kim; N. Kimura; L. Kirsch; S. Klimenko; M. Klute; B. Knuteson; B. R. Ko; S. A. Koay; K. Kondo; D. J. Kong; J. Konigsberg; A. Korytov; A. V. Kotwal; J. Kraus; M. Kreps; J. Kroll; N. Krumnack; M. Kruse; V. Krutelyov; T. Kubo; S. E. Kuhlmann; T. Kuhr; N. P. Kulkarni; Y. Kusakabe; S. Kwang; A. T. Laasanen; S. Lai; S. Lami; S. Lammel; M. Lancaster; R. L. Lander; K. Lannon; A. Lath; G. Latino; I. Lazzizzera; T. Lecompte; J. Lee; Y. J. Lee; S. W. Lee; R. Lefèvre; N. Leonardo; S. Leone; S. Levy; J. D. Lewis; C. Lin; J. Linacre; M. Lindgren; E. Lipeles; A. Lister; D. O. Litvintsev; T. Liu; N. S. Lockyer; A. Loginov; M. Loreti; L. Lovas; R.-S. Lu; D. Lucchesi; J. Lueck; C. Luci; P. Lujan; P. Lukens; G. Lungu; L. Lyons; J. Lys; R. Lysak; E. Lytken; P. Mack; D. MacQueen; R. Madrak; K. Maeshima; K. Makhoul; T. Maki; P. Maksimovic; S. Malde; S. Malik; G. Manca; A. Manousakis; F. Margaroli; C. Marino; A. Martin; M. Martin; V. Martin; M. Martínez; R. Martínez-Ballarín; T. Maruyama; P. Mastrandrea; T. Masubuchi; M. E. Mattson; P. Mazzanti; K. S. McFarland; P. McIntyre; R. McNulty; A. Mehta; P. Mehtala; S. Menzemer; A. Menzione; P. Merkel; C. Mesropian; A. Messina; T. Miao; N. Miladinovic; J. Miles; R. Miller; C. Mills; M. Milnik; A. Mitra; G. Mitselmakher; H. Miyake; S. Moed; N. Moggi; C. S. Moon; R. Moore; M. Morello; P. Movilla Fernandez; J. Muelmenstaedt; A. Mukherjee; Th. Muller; R. Mumford; P. Murat; M. Mussini; J. Nachtman; Y. Nagai; A. Nagano; J. Naganoma; K. Nakamura; I. Nakano; A. Napier; V. Necula; C. Neu; M. S. Neubauer; J. Nielsen; L. Nodulman; M. Norman

    2008-01-01

    We search for pair production of doubly charged Higgs particles (H±±) followed by decays into electron-tau (etau) and muon-tau (mutau) pairs using data (350pb-1) collected from pmacr p collisions at s=1.96TeV by the CDF II experiment. We search separately for cases where three or four final-state leptons are detected, and combine results for exclusive decays to left-handed etau (mutau) pairs.

  13. Measurement of the decay tau--->pi-pi+pi-2pi0nutau

    Microsoft Academic Search

    D. Bortoletto; D. N. Brown; J. Fast; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; S. F. Schaffner; E. I. Shibata; I. P. Shipsey; P. N. Wang; M. Battle; J. Ernst; H. Kroha; S. Roberts; K. Sparks; E. H. Thorndike; C. H. Wang; J. Dominick; S. Sanghera; T. Skwarnicki; R. Stroynowski; M. Artuso; D. He; M. Goldberg; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; S. Stone; M. Thulasidas; G. Vasseur; G. Zhu; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; P. Sheldon; D. S. Akerib; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'grady; J. Urheim; A. J. Weinstein; D. Acosta; M. Athanas; G. Masek; B. Ong; H. Paar; M. Sivertz; A. Bean; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; J. D. Richman; A. Ryd; H. Tajima; D. Schmidt; D. Sperka; M. S. Witherell; M. Procario; S. Yang; R. Balest; K. Cho; M. Dauodi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; P. S. Drell; R. Ehrlich; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; M. Ogg; J. R. Patterson; D. Peterson; D. Riley; S. Salman; M. Sapper; H. Worden; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; J. Yelton; D. Cinabro; S. Henderson; K. Kinoshita; T. Liu; M. Saulnier; F. Shen; R. Wilson; H. Yamamoto; M. Selen; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; N. Kwak; H. Lam; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'neill; H. Severini; C. R. Sun; M. M. Zoeller; G. Crawford; C. M. Daubenmier; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; R. Malchow; F. Morrow; Y. Skovpen; M. Sung; C. White; J. Whitmore; P. Wilson; F. Butler; X. Fu; G. Kalbfleisch; M. Lambrecht; W. R. Ross; P. Skubic; J. Snow; P. L. Wang; M. Wood

    1993-01-01

    The decay tau--->pi-pi+pi-2pi0nutau has been observed in e+e- annihilation using the CLEO II detector at the Cornell Electron Storage Ring. In a data sample collected at &surd;s ~10.6 GeV, 668+\\/-38 decay candidates have been identified by exclusively reconstructing two pi0's accompanying three charged particles, which are assumed to be pions. Normalizing to the number of tau pairs detected with one

  14. Search for new mechanism of CP violation through tau decay and semileptonic decay at hadrons

    SciTech Connect

    Tsai, Yung Su

    1996-11-01

    If CP is violated in any decay process involving leptons it will signify the existence of a new force (called the X boson) responsible for CP violation that may be the key to understanding matter-antimatter asymmetry in the universe. The author discusses the signatures of CP violation in (1) the decay of tau lepton, and (2) the semileptonic decay of {pi}, K, D, B and t particles by measuring the polarization of the charged lepton in the decay. The author discusses how the coupling constants and their phases of the coupling of the X boson to 9 quark vertices and 3 lepton vertices can be obtained through 12 decay processes.

  15. Review of Standard Tau Decays From the B-Factory Experiments

    SciTech Connect

    Salvatore, F.; /Royal Holloway, U. of London

    2011-11-15

    B-factories have been successfully operating for more than 8 years, providing an unprecedented data sample of e{sup +}e{sup 0} {yields} hadrons events. The BABAR and Belle experiments have in fact already collected over 550 fb{sup -1} and 800 fb{sup -1} respectively at the {Upsilon}(4s) center-of-mass (CM) energy. At this energy, the cross-section for tau production is of the same order of the cross-section for b production: {sigma}(b{bar b}) {approx} 1.1 nb {approx} {sigma}({tau}{sup +}{tau}{sup -}) {approx} 0.9 nb. For this reason, B-factories can now be considered also Tau-factories. A review of the most recent results on standard tau decays from the BABAR and Belle experiments is presented in this article.

  16. Search for anomalous couplings in the decay of polarized Z bosons to tau lepton pairs

    SciTech Connect

    Torrence, E.C.

    1997-06-01

    Using a sample of 4,500 polarized Z decays to {tau} lepton pairs accumulated with the SLD detector at the SLAC Linear Collider (SLC) in 1993-95, a search has been made for anomalous couplings in the neutral current reaction e{sup +}e{sup {minus}}{yields}{tau}{sup +}{tau}{sup {minus}}. A measurement of the CP violating Weak Electric Dipole Moment (WEDM) and the CP conserving Weak Magnetic Dipole Moment (WMDM) of the {tau} lepton has been performed by considering the transverse spin polarization of {tau} leptons produced at the Z pole. Using a maximum likelihood technique, the observed {tau} decay spectra in the e, {mu}, {pi}, and {rho} decay channels are used to infer the net transverse polarization of the underlying tau leptons, and a fit for the anomalous dipole moments is performed. No evidence for these dipole movements is observed, and limits are placed on both the real and imaginary parts of the WEDM and WMDM.

  17. Measurement of the strong coupling constant using tau decays

    Microsoft Academic Search

    Damir Buskulic; D. Decamp; C. Goy; J.-P. Lees; M.-N. Minard; B. Mours; B. Pietrzyk; R. Alemany; F. Ariztizabal; P. Comas; J. M. Crespo; M. Delfino; E. Fernandez; M. Fernandez-Bosman; V. Gaitan; Ll. Garrido; T. Mattison; A. Pacheco; C. Padilla; A. Pascual; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; M. Maggi; S. Natali; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Chai; H. Hu; D. Huang; X. Huang; J. Lin; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; L. Zhang; W. Zhao; L. A. T. Bauerdick; E. Blucher; G. Bonvicini; J. Boudreau; D. Casper; H. Drevermann; R. W. Forty; G. Ganis; C. Gay; R. Hagelberg; J. Harvey; S. Haywood; J. Hilgart; R. Jacobsen; B. Jost; J. Knobloch; I. Lehraus; T. Lohse; A. Lusiani; M. Martinez; P. Mato; H. Meinhard; A. Minten; A. Miotto; R. Miquel; H.-G. Moser; P. Palazzi; J. A. Perlas; J.-F. Pusztaszeri; F. Ranjard; G. Redlinger; L. Rolandi; J. Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; F. Sefkow; W. Tejessy; H. Wachsmuth; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; F. Badaud; M. Bardadin-Otwinowska; R. El Fellous; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; F. Podlyski; J. Proriol; F. Prulhière; F. Saadi; T. Fearnley; J. D. Hansen; J. R. Hansen; P. H. Hansen; R. Møllerud; B. S. Nilsson; I. Efthymiopoulos; A. Kyriakis; E. Simopoulou; A. Vayaki; K. Zachariadou; J. Badier; A. Blondel; G. Bonneaud; J. C. Brient; G. Fouque; S. Orteu; A. Rougé; M. Rumpf; R. Tanaka; M. Verderi; H. Videau; D. J. Candlin; M. I. Parsons; E. Veitch; L. Moneta; G. Parrini; M. Corden; C. Georgiopoulos; M. Ikeda; J. Lannutti; D. Levinthal; M. Mermikides; L. Sawyer; S. Wasserbaech; A. Antonelli; R. Baldini; G. Bencivenni; F. Bossi; P. Campana; G. Capon; F. Cerutti; V. Chiarella; B. D'Ettorre-Piazzoli; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; L. Passalacqua; M. Pepe-Altarelli; P. Picchi; P. Colrain; I. Ten Have; J. G. Lynch; W. Maitland; C. Raine; P. Reeves; J. M. Scarr; K. Smith; M. G. Smith; A. S. Thompson; R. M. Turnbull; B. Brandl; O. Braun; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; Y. Maumary; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; A. T. Belk; R. Beuselinck; D. M. Binnie; W. Cameron; M. Cattaneo; D. J. Colling; P. J. Dornan; S. Dugeay; A. M. Greene; J. F. Hassard; N. M. Lieske; J. Nash; D. G. Payne; M. J. Phillips; J. K. Sedgbeer; I. R. Tomalin; A. G. Wright; P. Girtler; E. Kneringer; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Keemer; M. Nuttall; A. Patel; T. Sloan; S. W. Snow; E. P. Whelan; K. Kleinknecht; J. Raab; B. Renk; H.-G. Sander; H. Schmidt; F. Steeg; S. M. Walther; R. Wanke; B. Wolf; J.-J. Aubert; A. M. Bencheikh; C. Benchouk; A. Bonissent; J. Carr; P. Coyle; J. Drinkard; F. Etienne; D. Nicod; S. Papalexiou; P. Payre; L. Roos; D. Rousseau; P. Schwemling; M. Talby; S. Adlung; R. Assmann; C. Bauer; W. Blum; D. Brown; P. Cattaneo; B. Dehning; H. Dietl; F. Dydak; M. Frank; A. W. Halley; J. Lauber; G. Lütjens; W. Männer; R. Richter; H. Rotscheidt; J. Schröder; A. S. Schwarz; R. Settles; H. Seywerd; U. Stierlin; U. Stiegler; R. St. Denis; G. Wolf; J. Boucrot; O. Callot; A. Cordier; M. Davier; L. Duflot; J.-F. Grivaz; Ph. Heusse; D. E. Jaffe; P. Janot; D. W. Kim; F. Le Diberder; J. Lefrançois; A.-M. Lutz; M.-H. Schune; J.-J. Veillet; I. Videau; Z. Zhang; D. Abbaneo; G. Bagliesi; G. Batignani; L. Bosisio; U. Bottigli; C. Bozzi; G. Calderini; M. Carpinelli; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; E. Focardi; F. Forti; A. Giassi; M. A. Giorgi; A. Gregorio; F. Ligabue; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; F. Palla; G. Rizzo; G. Sanguinetti; P. Spagnolo; J. Steinberger; R. Tenchini; G. Tonelli; G. Triggiani; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; A. P. Betteridge; J. M. Carter; M. G. Green; P. V. March; Ll. M. Mir; T. Medcalf; I. S. Quazi; J. A. Strong; L. R. West; D. R. Botterill; R. W. Clifft; T. R. Edgecock; M. Edwards; S. M. Fisher; T. J. Jones; P. R. Norton; D. P. Salmon; J. C. Thompson; B. Bloch-Devaux; P. Colas; H. Duarte; W. Kozanecki; E. Lançon; M. C. Lemaire; E. Locci; P. Perez; F. Perrier; J. Rander; J.-F. Renardy; A. Rosowsky; A. Roussarie; J.-P. Schuller; J. Schwindling; D. Si Mohand; B. Vallage; R. P. Johnson; A. M. Litke; G. Taylor; J. Wear; J. G. Ashman; W. Babbage; C. N. Booth; C. Buttar; R. E. Carney; S. Cartwright; F. Combley; F. Hatfield; L. F. Thompson; E. Barberio; A. Böhrer; S. Brandt; G. Cowan; C. Grupen; G. Lutters; F. Rivera; U. Schäfer; L. Smolik; R. della Marina; G. Giannini; B. Gobbo; F. Ragusa; L. Bellantoni; W. Chen; D. Cinabro; J. S. Conway; D. F. Cowen; Z. Feng; D. P. S. Ferguson; Y. S. Gao; J. Grahl; J. L. Harton; R. C. Jared; B. W. Leclaire

    1993-01-01

    The strong coupling constant is determined from the leptonic branching ratios, the lifetime, and the invariant mass distribution of the hadronic final state of the tau lepton, using data accumulated at LEP with the ALEPH detector. The strong coupling constant measurement, alphas(mtau2) = 0.330+\\/-0.046, evolved to the Z mass yields alphas(MZ2) = 0.188+\\/-0.005. The error includes experimental and theoretical uncertainties,

  18. A measurement of the tau lepton lifetime

    Microsoft Academic Search

    M. Battle; J. Ernst; H. Kroha; S. Roberts; K. Sparks; E. H. Thorndike; C.-H. Wang; R. Stroynowski; M. Artuso; M. Goldberg; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; S. Playfer; Y. Rozen; P. Rubin; T. Skwarnicki; S. Stone; M. Thulasidas; W.-M. Yao; G. Zhu; A. V. Bernes; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; T. Letson; M. D. Mestayer; P. Sheldon; D. S. Akerib; B. Barish; M. Chadha; D. F. Cowen; G. Eigen; J. S. Miller; J. Urheim; A. J. Weinstein; D. Acosta; G. Masek; B. Ong; H. Paar; M. Sivertz; A. Bean; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; H. Nelson; J. Richman; H. Tajima; D. Schmidt; D. Sperka; M. Witherell; M. Procario; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; E. Cheu; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; A. M. Halling; D. L. Hartill; B. K. Heltsley; K. Honscheid; C. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; J. D. Lewis; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; S. Nandi; C. R. Ng; E. Nordberg; C. O'Grady; J. R. Patterson; D. Peterson; M. Pisharody; D. Riley; M. Sapper; M. Selen; A. Silverman; H. Worden; M. Worris; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; J. Yelton; D. Cinabro; S. Henderson; K. Kinoshita; T. Liu; F. M. Pipkin; M. Saulnier; R. Wilson; J. Wolinski; D. Xiao; H. Yamamoto; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; D. Coppage; N. Copty; R. Davis; P. Haas; N. Hancock; M. Kelly; N. Kwak; H. Lam; S. Ro; Y. Kubota; M. Lattery; J. K. Nelson; D. Perticone; R. Poling; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; W. C. Li; B. Nemati; J. J. O'Neill; V. Romero; H. Severini; C. R. Sun; P.-N. Wang; M. M. Zoeller; G. Crawford; R. Fulton; K. K. Gan; T. Jensen; H. Kagan; R. Kass; J. Lee; R. Malchow; F. Morrow; M. Sung; C. White; J. Whitmore; P. Wilson; F. Butler; X. Fu; G. Kalbfleisch; M. Lambrecht; P. Skubic; J. Snow; P.-L. Wang; D. Bortoletto; D. N. Brown; J. Dominick; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; S. F. Schaffner; E. I. Shibata; I. P. J. Shipsey

    1992-01-01

    Using tau+tau- pairs in which one tau decays to leptons and the other decays to 3 charged particles we present a high statistics measurement of the tau lepton lifetime. The data used in this analysis were collected with the CLEO detector at CESR and consist of an integrated luminosity of 429 pb-1 taken at, above, and below the Upsilon (4S).

  19. Tau longitudinal polarization in B -> D tau nu and its role in the search for charged Higgs boson

    E-print Network

    Minoru Tanaka; Ryoutaro Watanabe

    2010-07-28

    We study the longitudinal polarization of the tau lepton in B -> D tau nu decay. After discussing possible sensitivities of tau decay modes to the tau polarization, we examine the effect of charged Higgs boson on the tau polarization in B -> D tau nu. We find a relation between the decay rate and the tau polarization, and clarify the role of the tau polarization measurement in the search for the charged Higgs boson.

  20. A Search for the Decay Modes B +/- to h +/- tau l

    SciTech Connect

    Lees, J.P.

    2012-07-20

    We present a search for the lepton flavor violating decay modes B{sup {+-}} {yields} h{sup {+-}} {tau}{ell} (h = K, {pi}; {ell} = e, {mu}) using the BABAR data sample, which corresponds to 472 million B{bar B} pairs. The search uses events where one B meson is fully reconstructed in one of several hadronic final states. Using the momenta of the reconstructed B, h, and {ell} candidates, we are able to fully determine the {tau} four-momentum. The resulting {tau} candidate mass is our main discriminant against combinatorial background. We see no evidence for B{sup {+-}} {yields} h{sup {+-}} {tau}{ell} decays and set a 90% confidence level upper limit on each branching fraction at the level of a few times 10{sup -5}.

  1. A study of the hadronic resonance structure in the decay tau-->3pinutau

    Microsoft Academic Search

    P. Abreu; W. Adam; T. Adye; P. Adzic; G. D. Alekseev; R. Alemany; P. P. Allport; S. Almehed; U. Amaldi; S. Amato; P. Andersson; A. Andreazza; P. Antilogus; W.-D. Apel; Y. Arnoud; B. Åsman; J.-E. Augustin; A. Augustinus; P. Baillon; P. Bambade; F. Barao; G. Barbiellini; R. Barbier; D. Y. Bardin; G. Barker; A. Baroncelli; O. Barring; M. J. Bates; M Baubillier; K.-H. Becks; M. Begalli; P. Beilliere; Yu. Belokopytov; K. Belous; A. C. Benvenuti; C. Berat; M. Berggren; D Bertrand; M. Besancon; F. Bianchi; M. Bigi; M A Bizouard; D. Bloch; M. Bonesini; W. Bonivento; M. Boonekamp; P. S. L. Booth; A. W. Borgland; G. Borisov; C. Bosio; O. Botner; E. Boudinov; B. Bouquet; C. Bourdarios; T. J. V. Bowcock; I Bozovic; M. Bozzo; P. Branchini; K. D. Brand; T. Brenke; R. A. Brenner; R. Brown; P. Bruckman; J.-M. Brunet; L. Bugge; T Burgsmüller; T. Burgsmueller; P. Buschmann; S. Cabrera; M. Caccia; M. Calvi; A. J. Camacho Rozas; T. Camporesi; V. Canale; M. Canepa; F. Carena; L. Carroll; C. Caso; M. V. Castillo Gimenez; A. Cattai; F. R. Cavallo; Ch. Cerruti; V. Chabaud; M. Chapkin; Ph. Charpentier; L. Chaussard; P. Checchia; G. A. Chelkov; M. Chen; R. Chierici; P. Chliapnikov; P. Chochula; V. Chorowicz; J. Chudoba; K. Cieslik; P. Collins; M. Colomer; R. Contri; E. Cortina; G. Cosme; F. Cossutti; J.-H. Cowell; H. B. Crawley; D. Crennell; G. Crosetti; J. Cuevas Maestro; S. Czellar; B. Dalmagne; G. Damgaard; P. D. Dauncey; M. Davenport; W. da Silva; A. Deghorain; G. della Ricca; P. Delpierre; N. Demaria; A. de Angelis; W. de Boer; S. de Brabandere; C. de Clercq; B. de Lotto; A. de Min; L. de Paula; H. Dijkstra; L. di Ciaccio; A. di Diodato; A. Djannati; J. Dolbeau; K. Doroba; M. Dracos; J. Drees; K.-A. Drees; M. Dris; A. Duperrin; J.-D. Durand; D. Edsall; R. Ehret; G. Eigen; T. Ekelof; G. Ekspong; M. Ellert; M. Elsing; J.-P. Engel; B. Erzen; E. Falk; G. Fanourakis; D. Fassouliotis; J. Fayot; M. Feindt; P. Ferrari; A. Ferrer; S. Fichet; A. Firestone; P.-A. Fischer; U. Flagmeyer; H. Foeth; E. Fokitis; F. Fontanelli; B. Franek; A. G. Frodesen; R. Fruhwirth; F. Fulda-Quenzer; J. Fuster; A. Galloni; D. Gamba; M. Gandelman; C. Garcia; J. Garcia; C. Gaspar; M. Gaspar; U. Gasparini; Ph. Gavillet; E. N. Gazis; D. Gele; J.-P. Gerber; L. Gerdyukov; N. Ghodbane; F. Glege; R. Gokieli; B. Golob; P. Goncalves; I. Gonzalez Caballero; G. Gopal; L. Gorn; M. Gorski; V. Gracco; J. Grahl; E. Graziani; C. Green; A. Grefrath; P. Gris; G. Grosdidier; K. Grzelak; M. Gunther; J. Guy; F. Hahn; S Haider; A. Hallgren; K. Hamacher; F. J. Harris; V. Hedberg; S. Heising; R. Henriques; J. J. Hernandez; P. Herquet; H. Herr; T. L. Hessing; J.-M. Heuser; E. Higon; S.-O. Holmgren; P. J. Holt; D. Holthuizen; S. Hoorelbeke; M. Houlden; J. Hrubec; K Hultqvist; J. N. Jackson; R. Jacobsson; P. Jalocha; R. Janik; Ch. Jarlskog; G. Jarlskog; P. Jarry; B. Jean-Marie; E. K. Johansson; L. Jonsson; P. Jonsson; C. Joram; P. Juillot; F. Kapusta; K. Karafasoulis; S. Katsanevas; E. C. Katsoufis; R. Keranen; Yu. Khokhlov; B. A. Khomenko; N. N. Khovanski; B. King; N. J. Kjaer; O. Klapp; H. Klein; P. Kluit; D. Knoblauch; P. Kokkinias; M. Koratzinos; V. Kostioukhine; C. Kourkoumelis; O. Kouznetsov; M. Krammer; C. Kreuter; I. Kronkvist; Z. Krumstein; P. Kubinec; W. Kucewicz; K. Kurvinen; C. Lacasta; J. W. Lamsa; L. Lanceri; P. Langefeld; J.-P. Laugier; R. Lauhakangas; G. Leder; F. Ledroit; V. Lefebure; C. K. Legan; A. Leisos; R. Leitner; J. Lemonne; G. Lenzen; V. Lepeltier; T. Lesiak; M. Lethuillier; J. Libby; D. Liko; A. Lipniacka; I. Lippi; B. Loerstad; J. G. Loken; J. H. Lopes; J. M. Lopez; D. Loukas; P. Lutz; L. Lyons; J. MacNaughton; G. Maehlum; J. R. Mahon; A Malek; T. G. M. Malmgren; V. Malychev; F. Mandl; J. Marco; R. Marco; B. Marechal; M. Margoni; J.-C. Marin; C. Mariotti; A. Markou; C. Martinez-Rivero; F. Martinez-Vidal; S. Marti I Garcia; J. Masik; F. Matorras; C. Matteuzzi; G. Matthiae; F. Mazzucato; M. Mazzucato; M. Mc Cubbin; R. Mc Kay; R. Mc Nulty; G. Mc Pherson; J. Medbo; C. Meroni; W. T. Meyer; A. Miagkov; M. Michelotto; E. Migliore; L. Mirabito; W. A. Mitaroff; U. Mjoernmark; T. Moa; R. Moeller; K. Moenig; M. R. Monge; X. Moreau; P. Morettini; H. Mueller; K. Muenich; M. Mulders; L. M. Mundim; W. J. Murray; B. Muryn; G. Myatt; T. Myklebust; F. Naraghi; F. L. Navarria; S. Navas; K. Nawrocki; P. Negri; S. Nemecek; N. Neufeld; W. Neumann; N. Neumeister; R. Nicolaidou; B. S. Nielsen; M. Nieuwenhuizen; V. Nikolaenko; M. Nikolenko; P. Niss; A. Nomerotski; A. Normand; A. Nygren; W. Oberschulte-Beckmann; V. Obraztsov; A. G. Olshevski; A. Onofre; R. Orava; G. Orazi; K. Osterberg; A. Ouraou; P. Paganini; M. Paganoni; S. Paiano; R Paiva; H. Palka; Th. D. Papadopoulou; K. Papageorgiou; L. Pape; C. Parkes; F. Parodi; U. Parzefall; A. Passeri; M. Pegoraro; L. Peralta; H. Pernegger; M. Pernicka; A. Perrotta; C. Petridou; A. Petrolini

    1998-01-01

    The hadronic structure of the decay of the tau lepton to three charged particles, tau-->3pinutau, is studied using data collected by the DELPHI detector at LEP between 1992 and 1995. The invariant mass of the 3pi system, m3pi, is fitted using the models of Kühn and Santamaria, Isgur Morningstar and Reader, and Feindt. The 3pi and pi+pi- mass spectra are

  2. Limit on the tau neutrino mass

    Microsoft Academic Search

    D. Cinabro; S. Henderson; K. Kinoshita; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; N. Kwak; H. Lam; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'neill; V. Romero; H. Severini; C. R. Sun; M. M. Zoeller; G. Crawford; R. Fulton; D. Fujino; K. K. Gan; H. Kagan; R. Kass; J. Lee; R. Malchow; F. Morrow; Y. Skovpen; M. Sung; C. White; J. Whitmore; P. Wilson; F. Butler; X. Fu; G. Kalbfleisch; M. Lambrecht; W. R. Ross; P. Skubic; J. Snow; P. L. Wang; M. Wood; D. Bortoletto; D. N. Brown; J. Dominick; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; S. F. Schaffner; E. I. Shibata; I. P. J. Shipsey; P. N. Wang; M. Battle; J. Ernst; H. Kroha; S. Roberts; K. Sparks; E. H. Thorndike; C. H. Wang; S. Sanghera; T. Skwarnicki; R. Stroynowski; M. Artuso; D. He; M. Goldberg; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; P. Rubin; S. Stone; M. Thulasidas; G. Vasseur; G. Zhu; A. V. Barnes; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; P. Sheldon; D. S. Akerib; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; J. Urheim; A. J. Weinstein; D. Acosta; M. Athanas; G. Masek; B. Ong; H. Paar; M. Sivertz; A. Bean; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; J. D. Richman; H. Tajima; D. Schmidt; D. Sperka; M. S. Witherell; M. Procario; S. Yang; R. Balest; K. Cho; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; M. Ogg; C. O'grady; J. R. Patterson; D. Peterson; D. Riley; M. Sapper; M. Selen; H. Worden; M. Worris; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; J. Yelton

    1993-01-01

    A limit on the tau neutrino mass Mnutau is obtained from a study of tau decays in the reaction e+e--->tau+tau- at center-of-mass energies ~10.6 GeV. The result is based on an end-point analysis of the invariant mass spectrum of the decay products in the decay modes tau--->3h-2h+nutau and tau--->2h-h+2pi0nutau. The data sample used in this analysis contains 1.77×106 tau pairs,

  3. Lepton-flavor-violating decay {tau}{yields}{mu}{mu}{mu} at the CERN LHC

    SciTech Connect

    Giffels, M.; Stahl, A. [III. Physikalisches Institut, RWTH Aachen, 52056 Aachen (Germany); Kallarackal, J. [Institut fuer Theoretische Physik, RWTH Aachen, 52074 Aachen (Germany); Institut fuer Physik, Humboldt-Universitaet zu Berlin, 12489 Berlin (Germany); Kraemer, M.; O'Leary, B. [Institut fuer Theoretische Physik, RWTH Aachen, 52074 Aachen (Germany)

    2008-04-01

    Lepton-flavor-violating {tau} decays are predicted in many extensions of the standard model at a rate observable at future collider experiments. In this article we focus on the decay {tau}{yields}{mu}{mu}{mu}, which is a promising channel to observe lepton-flavor violation at the CERN Large Hadron Collider (LHC). We present analytic expressions for the differential decay width derived from a model-independent effective Lagrangian with general four-fermion operators, and estimate the experimental acceptance for detecting the decay {tau}{yields}{mu}{mu}{mu} at the LHC. Specific emphasis is given to decay angular distributions and how they can be used to discriminate new physics models. We provide specific predictions for various extensions of the standard model, including supersymmetric, little Higgs, and technicolor models.

  4. Evidence for the 125 GeV Higgs boson decaying to a pair of tau leptons

    E-print Network

    CMS Collaboration

    2014-06-12

    A search for a standard model Higgs boson decaying into a pair of tau leptons is performed using events recorded by the CMS experiment at the LHC in 2011 and 2012. The dataset corresponds to an integrated luminosity of 4.9 inverse femtobarns at a centre-of-mass energy of 7 TeV and 19.7 inverse femtobarns at 8 TeV. Each tau lepton decays hadronically or leptonically to an electron or a muon, leading to six different final states for the tau-lepton pair, all considered in this analysis. An excess of events is observed over the expected background contributions, with a local significance larger than 3 standard deviations for m[H] values between 115 and 130 GeV. The best fit of the observed H to tau tau signal cross section for m[H] = 125 GeV is 0.78 +- 0.27 times the standard model expectation. These observations constitute evidence for the 125 GeV Higgs boson decaying to a pair of tau leptons.

  5. A measurement of tau polarization at LEP

    Microsoft Academic Search

    M. Acciarri; A. Adam; O. Adriani; M. Aguilar-Benitez; S P Ahlen; J. Alcaraz; A. Aloisio; G. Alverson; M. G. Alviggi; G. Ambrosi; Q. An; H. Anderhub; A. L. Anderson; V. P. Andreev; T. Angelescu; L. Antonov; D. Antreasyan; G. Alkhazov; P. Arce; A. Arefiev; T. Azemoon; T. Aziz; P. V. K. S. Baba; P. Bagnaia; J. A. Bakken; L. Baksay; R. C. Ball; S. Banerjee; K. Banicz; R. Barillère; L. Barone; A. Baschirotto; M. Basile; R. Battiston; A. Bay; F. Becattini; U. Becker; F. Behner; Gy. L. Bencze; J. Berdugo; P. Berges; B. Bertucci; B. L. Betev; M. Biasini; A. Biland; G. M. Bilei; R. Bizzarri; J. J. Blaising; Gerjan J Bobbink; R K Böck; A. Böhm; B. Borgia; A. Boucham; D. Bourilkov; Maurice Bourquin; D. Boutigny; B T Bouwens; Elena Brambilla; J. G. Branson; V. Brigljevic; I. C. Brock; M. Brooks; A T Bujak; J. D. Burger; W. J. Burger; C. Burgos; J K Busenitz; A O Buytenhuijs; A. Bykov; X. D. Cai; M. Capell; G. Cara Romeo; M. Caria; G. Carlino; A. M. Cartacci; J. Casaus; R. Castello; N. Cavallo; M Cerrada-Canales; F. Cesaroni; M Chamizo-Llatas; Y. H. Chang; U. K. Chaturvedi; M. Chemarin; A. Chen; G. Chen; H. F. Chen; H. S. Chen; M. Chen; G. Chiefari; C. Y. Chien; M. T. Choi; S. Chung; Luisa Cifarelli; F. Cindolo; C. Civinini; I. Clare; R. Clare; T. E. Coan; H. O. Cohn; G. Coignet; N. Colino; S. Costantini; F. Cotorobai; B. de La Cruz; X. T. Cui; X. Y. Cui; T. S. Dai; R. D'Alessandro; R. de Asmundis; A. Degré; K. Deiters; E. Dénes; P. Denes; F. Denotaristefani; Daryl DiBitonto; M. Diemoz; H. R. Dimitrov; C. Dionisi; Michael Dittmar; L. Djambazov; I. Dorne; M. T. Dova; E. Drago; D. Duchesneau; F. Duhem; P. Duinker; I. Duran; S. Dutta; S. Easo; H. El Mamouni; A. Engler; F. J. Eppling; F. C. Erné; Pierre Extermann; R. Fabbretti; M. Fabre; S. Falciano; A. Favara; J. Fay; Marta Felcini; T. Ferguson; D. Fernandez; G. Fernandez; F. Ferroni; H S Fesefeldt; E. Fiandrini; J. H. Field; Frank Filthaut; P. H. Fisher; G. Forconi; L. Fredj; Klaus Freudenreich; M. Gailloud; Yu. Galaktionov; E. Gallo; S. N. Ganguli; P. Garcia-Abia; S. Gentile; J. Gerald; N. Gheordanescu; S. Giagu; S. Goldfarb; J. Goldstein; Z. F. Gong; E. Gonzalez; Andreas Gougas; D. Goujon; Giorgio Gratta; M. W. Gruenewald; C. Gu; M. Guanziroli; V. K. Gupta; A. Gurtu; H. R. Gustafson; L. J. Gutay; A. Hasan; D. Hauschildt; J. T. He; T. Hebbeker; M. Hebert; A. Hervé; K. Hilgers; H. Hofer; H. Hoorani; S. R. Hou; G. Hu; B. Ille; M. M. Ilyas; Vincenzo Innocente; H. Janssen; B. N. Jin; L. W. Jones; P. de Jong; I. Josa-Mutuberria; A. Kasser; R. A. Khan; Yu A Kamyshkov; P. Kapinos; J. S. Kapustinsky; Yu Karyotakis; M. Kaur; S. Khokhar; M. N. Kienzle-Focacci; D. Kim; J. K. Kim; S. C. Kim; Y. G. Kim; W. W. Kinnison; A. Kirkby; D. Kirkby; S. Kirsch; W. Kittel; A. Klimentov; A. C. König; E. Koffeman; O. Kornadt; V F Koutsenko; A. Koulbardis; R. W. Kraemer; T. Kramer; V. R. Krastev; W. Krenz; H. Kuijten; K. S. Kumar; A. Kunin; P. Ladron de Guevara; G. Landi; D. Lanske; S. Lanzano; A. Lebedev; P. Lebrun; P. Lecomte; P. Lecoq; P. Le Coultre; D. M. Lee; J. S. Lee; K. Y. Lee; I D Leedom; C. Leggett; J. M. Le Goff; R. Leiste; M. Lenti; E. Leonardi; P. Levtchenko; Li Chuan; E H Lieb; W. T. Lin; Frank L Linde; B. Lindemann; L. Lista; Y. Liu; W. Lohmann; E. Longo; W. Lu; Y. S. Lu; J. M. Lubbers; K. Lübelsmeyer; C. Luci; D. Luckey; L. Ludovici; L. Luminari; W. Lustermann; W. G. Ma; M. MacDermott; M. Maity; L. Malgeri; R. Malik; A. Malinin; C. Maña; S. Mangla; M. Maolinbay; P A Marchesini; A. Marin; J. P. Martin; F. Marzano; G. G. G. Massaro; K. Mazumdar; P. McBride; T. McMahon; D. McNally; S. Mele; M. Merk; L. Merola; M. Meschini; W. J. Metzger; Y. Mi; A. Mihul; G. B. Mills; Y. Mir; G. Mirabelli; J. Mnich; M. Möller; V. Monaco; B. Monteleoni; R. Morand; S. Morganti; N. E. Moulai; R. Mount; S. Müller; E. Nagy; M. Napolitano; F. Nessi-Tedaldi; H. Newman; M. A. Niaz; A. Nippe; H. Nowak; G. Organtini; D. Pandoulas; S. Paoletti; P. Paolucci; G. Pascale; G. Passaleva; S. Patricelli; T. Paul; M. Pauluzzi; C. Paus; Felicitas Pauss; Y. J. Pei; S. Pensotti; D. Perret-Gallix; A. Pevsner; D. Piccolo; M. Pieri; J. C. Pinto; P. A. Piroué; E. Pistolesi; F. Plasil; V. Plyaskin; M. Pohl; V Pozhidaev; H. Postema; N. Produit; J. M. Qian; K. N. Qureshi; R. Raghavan; G. Rahal-Callot; P. G. Rancoita; M. Rattaggi; G. Raven; P A Razis; K. Read; M. Redaelli; D. Ren; Z. Ren; M. Rescigno; S. Reucroft; A. Ricker; S. Riemann; B. C. Riemers; K. Riles; O. Rind; H. A. Rizvi; S. Ro; A. Robohm; F J Rodríguez-Calonge; B. P. Roe; M. Röhner; S. Röhner; L. Romero; S. Rosier-Lees; R. Rosmalen; Ph. Rosselet; W. van Rossum; S. Roth; André Rubbia; Juan Antonio Rubio; H. Rykaczewski; J. Salicio; E. Sanchez; G. S. Sanders; A. Santocchia; M. E. Sarakinos; S. Sarkar; G. Sartorelli; M. Sassowsky; G. Sauvage; C. Schäfer; V. Schegelsky; D. Schmitz; P. Schmitz; M. Schneegans; N. Scholz

    1994-01-01

    With a data sample of 86 000 Z --> tau+tau-(gamma) events collected in 1990 through 1993 we have measured the polarization of tau-leptons as a function of the production polar angle using the following 1-prong tau decay modes: tau--->e-vevtau, tau--->pi- (K-)vtau, tau--->varrho-vtau and tau--->a1-vtau. We obtain for the ratio vector to axial-vector weak neutral couplings for electrons gVe\\/gAe=0.0791+\\/-0.0099(stat)+\\/-0.0025 (syst) and

  6. Search for Lepton Flavour Violating Decays Tau -> l Ks with the BABAR Detector

    SciTech Connect

    Cenci, Riccardo; /SLAC

    2009-03-20

    We present the search for the lepton flavour violating decay {tau} {yields} lK{sup 0}{sub s} with the BaBar experiment data. This process and many other lepton flavour violating {tau} decays, like {tau} {yields} {mu}{gamma} and {tau} {yields} lll, are one of the most promising channel to search for evidence of new physics. According to the Standard Model and the neutrino mixing parameters, branching fractions are estimated well below 10{sup -14}, but many models of new physics allow for branching fractions values close to the present experimental sensitivity. This analysis is based on a data sample of 469fb{sup -1} collected by BABAR detector at the PEP-II storage ring from 1999 to 2007, equivalent to 431 millions of {tau} pairs. the BABAR experiment, initially designed for studying CP violation in B mesons, has demonstrated to be one of the most suitable environments for studying {tau} decays. The tracking system, the calorimeter and the particle identification of BABAR, together with the knowledge of the {tau} initial energy, allow an extremely powerful rejection of background events that, for this analysis, is better than 10{sup -9}. Being {tau} {yields} lK{sup 0}{sub s} a decay mode without neutrinos, the signal {tau} decay can be fully reconstructed. Kinematical constraints are used in a fit that provides a decay tree reconstruction with a high resolution. For this analysis MC simulated events play a decisive role for estimating the signal efficiency and study the residual background. High statistics MC sample are produced simulating detector conditions for different periods of data collection, in order to reduce any discrepancies with the data. When discrepancies can not be removed, we perform studies to compute a correction factor or an estimation of systematic errors that need to be included in the final measurement. A significant improvement of the current result can be reached only with a higher statistics and, therefore, with a new collider providing a luminosity from 10 to 100 times more than PEP-II. A new detector, with improved performance and able to collect data in a high background environment, is also requested to fully exploit the capability of such amount of data. In fact, only keeping the efficiency and the background as similar as possible to present ones, we will be able to scale almost linearly the estimated upper limit according to the luminosity. The strong potential of improvement for the search of lepton flavour violation {tau} decays makes the building of such a machine highly desirable.

  7. Search for Higgs bosons decaying to tau(+)tau(-) pairs in p(p)over-bar collisions at root s=1.96 TeV

    SciTech Connect

    Abazov, V.M.; Abazov, V. M.; Abbott, B.; Achary, B. S.; Adams, M.; Adams, T.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Alverson, G.; Alves, G. A.; Aoki, M.; Arov, M.; Askew, A.; Asman, B.; Atramentov, O.; Avila, C.; BackusMayes, J.; Badaud, F.; Bagby, L.; Baldin, B.; Bandurin, D. V.; Banerjee, S.; Barberis, E.; Baringer, P.; Barreto, J.; Bartlett, J. F.; Bassler, U.; Bazterra, V.; Beale, S.; Bean, A.; Begalli, M.; Begel, M.; Belanger-Champagne, C.; Bellantoni, L.; Beri, S. B.; Bernardi, G.; Bernhard, R.; Bertram, I.; Besancon, M.; Beuselinck, R.; Bezzubov, V. A.; Bhat, P. C.; Bhatnagar, V.; Blazey, G.; Blessing, S.; Bloom, K.; Boehnlein, A.; Boline, D.; Boos, E. E.; Borissov, G.; Bose, T.; Brandt, A.; Brandt, O.; Brock, R.; Brooijmans, G.; Bross, A.; Brown, D.; Brown, J.; Bu, X. B.; Buehler, M.; Buescher, V.; Bunichev, V.; Burdin, S.; Burnett, T. H.; Buszello, C. P.; Calpas, B.; Camacho-Perez, E.; Carrasco-Lizarraga, M. A.; Casey, B. C. K.; Castilla-Valdez, H.; Chakrabarti, S.; Chakraborty, D.; Chan, K. M.; Chandra, A.; Chen, G.; Chevalier-Thery, S.; Cho, D. K.; Cho, S. W.; Choi, S.; Choudhary, B.; Cihangir, S.; Claes, D.; Clutter, J.; Cooke, M.; Cooper, W. E.; Corcoran, M.; Couderc, F.; Cousinou, M. -C.; Croc, A.; Cutts, D.; Das, A.; Davies, G.; De, K.; de Jong, S. J.; De La Cruz-Burelo, E.; Deliot, F.; Demarteau, M.; Demina, R.; Denisov, D.; Denisov, S. P.; Desai, S.; Deterre, C.; DeVaughan, K.; Diehl, H. T.; Diesburg, M.; Ding, P. F.; Dominguez, A.; Dorland, T.; Dubey, A.; Dudko, L. V.; Duggan, D.; Duperrin, A.; Dutt, S.; Dyshkant, A.; Eads, M.; Edmunds, D.; Ellison, J.; Elvira, V. D.; Enari, Y.; Evans, H.; Evdokimov, A.; Evdokimov, V. N.; Facini, G.; Ferbel, T.; Fiedler, F.; Filthaut, F.; Fisher, W.; Fisk, H. E.; Fortner, M.; Fox, H.; Fuess, S.; Garcia-Bellido, A.; Gavrilov, V.; Gay, P.; Geng, W.; Gerbaudo, D.; Gerber, C. E.; Gershtein, Y.; Ginther, G.; Golovanov, G.; Goussiou, A.; Grannis, P. D.; Greder, S.; Greenlee, H.; Greenwood, Z. D.; Gregores, E. M.; Grenier, G.; Gris, Ph.; Grivaz, J. -F.; Grohsjea, A.; Gruenendahl, S.; Gruenewald, M. W.; Guillemin, T.; Guo, F.; Gutierrez, G.; Gutierrez, P.; Haas, A.; Hagopia, S.; Haley, J.; Hang, L.; Harder, K.; Harein, A.; Hauptman, J. M.; Hays, J.; Head, T.; Hebbeker, T.; Hedin, D.; Hegab, H.; Heinson, A. P.; Heintz, U.; Hensel, C.; Heredia-De La Cruz, I.; Herner, K.; Hesketh, G.; Hildreth, M. D.; Hirosky, R.; Hoangau, T.; Hobbs, J. D.; Hoeneisen, B.; Hohlfeld, M.; Hubacek, Z.; Huske, N.; Hynek, V.; Lashvili, I.; Ilchenko, Y.; Illingworth, R.; Ito, A. S.; Jabeen, S.; Jaffre, M.; Jamin, D.; Jayasinghe, A.; Jesik, R.; Johns, K.; Johnson, M.; Johnston, D.; Jonckheere, A.; Jonsson, P.; Joshi, J.; Jung, A. W.; Juste, A.; Kaadze, K.; Kajfasz, E.; Karmanov, D.; Kasper, P. A.; Katsanos, I. I.; Kehoe, R.; Kermiche, S.; Khalatyan, N.; Khanov, A.; Kharchilava, A.; Kharzheev, Y. N.; Kirby, M. H.; Kohli, J. M.; Kozelov, A. V.; Kraus, J.; Kulikov, S.; Kumar, A.; Kupco, A.; Kurca, T.; Kuzmin, V. A.; Kvita, J.; Lammers, S.; Landsberg, G.; Lebrun, P.; Lee, H. S.; Lee, S. W.; Lee, W. M.; Lellouch, J.; Li, L.; Li, Q. Z.; Lietti, S. M.; Lim, J. K.; Lincoln, D.; Linnemann, J.; Lipaev, V. V.; Lipton, R.; Liu, Y.; Liu, Z.; Lobodenko, A.; Lokajicek, M.; de Sa, R. Lopes; Lubatti, H. J.; Luna-Garcia, R.; Lyon, A. L.; Maciel, A. K. A.; Mackin, D.; Madar, R.; Magana-Villalba, R.; Malik, S.; Malyshev, V. L.; Maravin, Y.; Martinez-Ortega, J.; McCarthy, R.; McGivern, C. L.; Meijer, M. M.; Melnitchouk, A.; Menezes, D.; Mercadante, P. G.; Merkin, M.; Meyer, A.; Meyer, J.; et al.

    2012-02-01

    We present a search for the production of neutral Higgs bosons decaying into {tau}{sup +}{tau}{sup -} pairs in p{bar p} collisions at a center-of-mass energy of 1.96 TeV. The data, corresponding to an integrated luminosity of 5.4 fb{sup -1}, were collected by the D0 experiment at the Fermilab Tevatron Collider. We set upper limits at the 95% C.L. on the product of production cross section and branching ratio for a scalar resonance decaying into {tau}{sup +}{tau}{sup -} pairs, and we interpret these limits as limits on the production of Higgs bosons in the minimal supersymmetric standard model (MSSM) and as constraints in the MSSM parameter space.

  8. Observation of the Semileptonic Decays B to D*taunu and Evidence for B to D tau nu

    SciTech Connect

    B., Aubert

    2007-09-14

    We present measurements of the semileptonic decays B{sup -} {yields} D{sup 0}{tau}{sup -}{bar {nu}}{sub {tau}}, B{sup -} {yields} D{sup *0}{tau}{sup -}{bar {nu}}{sub {tau}}, B{sup -} {yields} D{sup +}{tau}{sup -}{bar {nu}}{sub {tau}}, and B{sup -} {yields} D{sup *+}{tau}{sup -}{bar {nu}}{sub {tau}}, which are potentially sensitive to non-Standard Model amplitudes, The data sample comprises 232 x 10{sup 6} {Upsilon}(4s) {yields} B{bar B} decays collected with the BABAR detector. From a combined fit to B{sup -} and {bar B}{sup 0} channels, we obtain the branching fractions {beta}(B {yields} D{sub {tau}}{sup -}{bar {nu}}{sub {tau}}) = (0:86 {+-} 0:24 {+-} 0:11 {+-} 0:06)% and {beta}(B {yields} D*{tau}{sup -}{bar {nu}}{sub {tau}}) = (1:62 {+-} 0:31 {+-} 0:10 {+-} 0:05)% (normalized for the {bar B}{sup 0}), , where the uncertainties are statistical, systematic, and normalization-mode-related.

  9. Secondary atmospheric tau neutrino production

    SciTech Connect

    Bulmahn, Alexander; Hall Reno, Mary [Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242 (United States)

    2010-09-01

    We evaluate the flux of tau neutrinos produced from the decay of pair produced taus from incident muons using a cascade equation analysis. To solve the cascade equations, our numerical result for the tau production Z moment is given. Our results for the flux of tau neutrinos produced from incident muons are compared to the flux of tau neutrinos produced via oscillations and the direct prompt atmospheric tau neutrino flux. Results are given for both downward and upward going neutrinos fluxes and higher zenith angles are discussed. We conclude that the direct prompt atmospheric tau neutrino flux dominates these other atmospheric sources of tau neutrinos for neutrino energies larger than a few TeV for upward fluxes, and over a wider range of energy for downward fluxes.

  10. What Renders TAU Toxic

    PubMed Central

    Götz, Jürgen; Xia, Di; Leinenga, Gerhard; Chew, Yee Lian; Nicholas, Hannah R.

    2013-01-01

    TAU is a microtubule-associated protein that under pathological conditions such as Alzheimer’s disease (AD) forms insoluble, filamentous aggregates. When 20?years after TAU’s discovery the first TAU transgenic mouse models were established, one declared goal that was achieved was the modeling of authentic TAU aggregate formation in the form of neurofibrillary tangles. However, as we review here, it has become increasingly clear that TAU causes damage much before these filamentous aggregates develop. In fact, because TAU is a scaffolding protein, increased levels and an altered subcellular localization (due to an increased insolubility and impaired clearance) result in the interaction of TAU with cellular proteins with which it would otherwise either not interact or do so to a lesser degree, thereby impairing their physiological functions. We specifically discuss the non-axonal localization of TAU, the role phosphorylation has in TAU toxicity and how TAU impairs mitochondrial functions. A major emphasis is on what we have learned from the four available TAU knock-out models in mice, and the knock-out of the TAU/MAP2 homolog PTL-1 in worms. It has been proposed that in human pathological conditions such as AD, a rare toxic TAU species exists which needs to be specifically removed to abrogate TAU’s toxicity and restore neuronal functions. However, what is toxic in one context may not be in another, and simply reducing, but not fully abolishing TAU levels may be sufficient to abrogate TAU toxicity. PMID:23772223

  11. Dispersive representation of the scalar and vector Kpi form factors for tau --> K pi nu_tau and K_{l3} decays

    E-print Network

    Véronique Bernard; Diogo R. Boito; Emilie Passemar

    2011-03-24

    Recently, the tau --> K pi nu_tau decay spectrum has been measured by the Belle and BaBar collaborations. In this work, we present an analysis of such decays introducing a dispersive parametrization for the vector and scalar Kpi form factors. This allows for precise tests of the Standard Model. For instance, the determination of f_+(0)|V_{us}| from these decays is discussed. A comparison and a combination of these results with the analyses of the K_{l3} decays is also considered.

  12. Tau identification at the Tevatron

    SciTech Connect

    Levy, Stephen; /Chicago U., EFI

    2005-07-01

    Methods for reconstructing and identifying the hadronic decays of tau leptons with the CDF and D0 detectors at the Fermilab Tevatron collider in Run II are described. Precision electroweak measurements of W and Z gauge boson cross sections are presented as well as results of searches for physics beyond the Standard Model with hadronically decaying tau leptons in the final state.

  13. Search for Higgs bosons decaying into tau pairs in ppbar collisions at D0

    SciTech Connect

    Owen, Mark A.; /Manchester U.

    2008-08-01

    A search for neutral Higgs bosons decaying into tau pairs is presented using data in p{bar p} collisions at {radical}s = 1.96 TeV. One of the tau leptons is identified via its decay into an electron or muon and the other via its decay into a hadronic final state. The data, corresponding to an integrated luminosity of around 1.0 fb{sup -1}, were collected with the D0 detector at the Fermilab Tevatron collider between April 2002 and February 2006. No significant excess of events above the background expectation is observed and limits on the cross section times branching ratio for neutral Higgs bosons decaying into tau pairs, p{bar p} {yields} {phi} {yields} {tau}{sup +}{tau}{sup -}, are set. The cross section limits are interpreted as exclusions in the parameter space of the minimal supersymmetric Standard Model, resulting in exclusions in the range 40 < tan{beta} < 70 for M{sub A} < 200 GeV. Finally, the effect of Higgs bosons with a large total width is considered and the first model independent correction to the cross section limits for the width effect is presented.

  14. Evidence for a Higgs boson in tau decays with the CMS detector

    E-print Network

    Dutta, Valentina

    2014-01-01

    In this thesis, I describe the search for a Higgs boson through its decay to a pair of tan leptons with the tau-pair subsequently decaying to ail electron, a muon, and neutrinos. The search is performed using data collected ...

  15. Tau in MAPK Activation

    PubMed Central

    Leugers, Chad J.; Koh, Ju Yong; Hong, Willis; Lee, Gloria

    2013-01-01

    The nature of “toxic” tau in Alzheimer’s disease (AD) has been unclear. During pathogenesis, the importance of tau oligomerization vs. tau phosphorylation is controversial and the investigation of both remains critical toward defining the “toxicity” of tau. The phosphorylation of tau on serines and/or threonines occurs early in the disease course and altering phosphorylation has been shown to disrupt neuropathogenesis. We have recently reported that in PC12-derived cells, tau had a role in signal transduction processes activated by NGF. By depleting tau, NGF-induced MAPK activation was attenuated and by restoring tau, MAPK activation was restored. Furthermore, the phosphorylation of tau on Thr231 was required for tau to potentiate MAPK activation. Here we report the effects of additional disease-related tau phosphorylation sites and tau isoform on the ability of tau to potentiate MAPK activation. Our findings, which tested three other sites of phosphorylation, showed that phosphorylation at these other sites mainly lessened MAPK activation; none potentiated MAPK activation. In comparing 0N3R tau to the other five brain tau isoforms, most showed a trend toward less MAPK activation, with only 2N4R tau showing significantly less activation. Since MAPK activation has been reported in AD brain and is characteristic of cell proliferation mechanisms, tau phosphorylation that promotes MAPK activation could promote cell cycle activation mechanisms. In neurons, the activation of the cell cycle leads to cell death, suggesting that abnormally phosphorylated tau can be a toxic species. The relationship between tau oligomerization and its ability to potentiate MAPK activation needs to be determined. PMID:24146661

  16. Discrimination of Models Including Doubly Charged Scalar Bosons by Using Tau Lepton Decay Distributions

    E-print Network

    Hiroaki Sugiyama

    2014-06-02

    The doubly-charged scalar boson H^{--} is involved in several new physics models for generating neutrino masses. Depending on new physics models, H^{--} has the Yukawa interaction with a pair of left-handed charged leptons or a pair of right-handed ones. In this talk, we see that these two Yukawa interactions can be distinguished by measuring energy distributions of charged pions produced by decays of tau leptons if pair-produced H^{++} H^{--} can decay sufficiently into four charged leptons which involve one or two tau leptons. The information on the Yukawa interaction of H^{--} will help to discriminate models in which neutrino masses are generated.

  17. Search for doubly charged Higgs bosons with lepton-flavor-violating decays involving tau leptons.

    PubMed

    Aaltonen, T; Adelman, J; Akimoto, T; Albrow, M G; Alvarez González, B; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Aoki, M; Apollinari, G; Apresyan, A; Arisawa, T; Artikov, A; Ashmanskas, W; Attal, A; Aurisano, A; Azfar, F; Azzi-Bacchetta, P; Azzurri, P; Bacchetta, N; Badgett, W; Barbaro-Galtieri, A; Barnes, V E; Barnett, B A; Baroiant, S; Bartsch, V; Bauer, G; Beauchemin, P-H; Bedeschi, F; Bednar, P; Behari, S; Bellettini, G; Bellinger, J; Belloni, A; Benjamin, D; Beretvas, A; Beringer, J; Berry, T; Bhatti, A; Binkley, M; Bisello, D; Bizjak, I; Blair, R E; Blocker, C; Blumenfeld, B; Bocci, A; Bodek, A; Boisvert, V; Bolla, G; Bolshov, A; Bortoletto, D; Boudreau, J; Boveia, A; Brau, B; Bridgeman, A; Brigliadori, L; Bromberg, C; Brubaker, E; Budagov, J; Budd, H S; Budd, S; Burkett, K; Busetto, G; Bussey, P; Buzatu, A; Byrum, K L; Cabrera, S; Campanelli, M; Campbell, M; Canelli, F; Canepa, A; Carlsmith, D; Carosi, R; Carrillo, S; Carron, S; Casal, B; Casarsa, M; Castro, A; Catastini, P; Cauz, D; Cavalli-Sforza, M; Cerri, A; Cerrito, L; Chang, S H; Chen, Y C; Chertok, M; Chiarelli, G; Chlachidze, G; Chlebana, F; Cho, K; Chokheli, D; Chou, J P; Choudalakis, G; Chuang, S H; Chung, K; Chung, W H; Chung, Y S; Ciobanu, C I; Ciocci, M A; Clark, A; Clark, D; Compostella, G; Convery, M E; Conway, J; Cooper, B; Copic, K; Cordelli, M; Cortiana, G; Crescioli, F; Cuenca Almenar, C; Cuevas, J; Culbertson, R; Cully, J C; Dagenhart, D; Datta, M; Davies, T; de Barbaro, P; De Cecco, S; Deisher, A; De Lentdecker, G; De Lorenzo, G; Dell'Orso, M; Demortier, L; Deng, J; Deninno, M; De Pedis, D; Derwent, P F; Di Giovanni, G P; Dionisi, C; Di Ruzza, B; Dittmann, J R; D'Onofrio, M; Donati, S; Dong, P; Donini, J; Dorigo, T; Dube, S; Efron, J; Erbacher, R; Errede, D; Errede, S; Eusebi, R; Fang, H C; Farrington, S; Fedorko, W T; Feild, R G; Feindt, M; Fernandez, J P; Ferrazza, C; Field, R; Flanagan, G; Forrest, R; Forrester, S; Franklin, M; Freeman, J C; Furic, I; Gallinaro, M; Galyardt, J; Garberson, F; Garcia, J E; Garfinkel, A F; Genser, K; Gerberich, H; Gerdes, D; Giagu, S; Giakoumopolou, V; Giannetti, P; Gibson, K; Gimmell, J L; Ginsburg, C M; Giokaris, N; Giordani, M; Giromini, P; Giunta, M; Glagolev, V; Glenzinski, D; Gold, M; Goldschmidt, N; Golossanov, A; Gomez, G; Gomez-Ceballos, G; Goncharov, M; González, O; Gorelov, I; Goshaw, A T; Goulianos, K; Gresele, A; Grinstein, S; Grosso-Pilcher, C; Grundler, U; Guimaraes da Costa, J; Gunay-Unalan, Z; Haber, C; Hahn, K; Hahn, S R; Halkiadakis, E; Hamilton, A; Han, B-Y; Han, J Y; Handler, R; Happacher, F; Hara, K; Hare, D; Hare, M; Harper, S; Harr, R F; Harris, R M; Hartz, M; Hatakeyama, K; Hauser, J; Hays, C; Heck, M; Heijboer, A; Heinemann, B; Heinrich, J; Henderson, C; Herndon, M; Heuser, J; Hewamanage, S; Hidas, D; Hill, C S; Hirschbuehl, D; Hocker, A; Hou, S; Houlden, M; Hsu, S-C; Huffman, B T; Hughes, R E; Husemann, U; Huston, J; Incandela, J; Introzzi, G; Iori, M; Ivanov, A; Iyutin, B; James, E; Jayatilaka, B; Jeans, D; Jeon, E J; Jindariani, S; Johnson, W; Jones, M; Joo, K K; Jun, S Y; Jung, J E; Junk, T R; Kamon, T; Kar, D; Karchin, P E; Kato, Y; Kephart, R; Kerzel, U; Khotilovich, V; Kilminster, B; Kim, D H; Kim, H S; Kim, J E; Kim, M J; Kim, S B; Kim, S H; Kim, Y K; Kimura, N; Kirsch, L; Klimenko, S; Klute, M; Knuteson, B; Ko, B R; Koay, S A; Kondo, K; Kong, D J; Konigsberg, J; Korytov, A; Kotwal, A V; Kraus, J; Kreps, M; Kroll, J; Krumnack, N; Kruse, M; Krutelyov, V; Kubo, T; Kuhlmann, S E; Kuhr, T; Kulkarni, N P; Kusakabe, Y; Kwang, S; Laasanen, A T; Lai, S; Lami, S; Lammel, S; Lancaster, M; Lander, R L; Lannon, K; Lath, A; Latino, G; Lazzizzera, I; LeCompte, T; Lee, J; Lee, J; Lee, Y J; Lee, S W; Lefèvre, R; Leonardo, N; Leone, S; Levy, S; Lewis, J D; Lin, C; Lin, C S; Linacre, J; Lindgren, M; Lipeles, E; Lister, A; Litvintsev, D O; Liu, T; Lockyer, N S; Loginov, A; Loreti, M; Lovas, L; Lu, R-S; Lucchesi, D; Lueck, J; Luci, C; Lujan, P; Lukens, P; Lungu, G; Lyons, L; Lys, J; Lysak, R; Lytken, E; Mack, P; MacQueen, D; Madrak, R; Maeshima, K; Makhoul, K; Maki, T; Maksimovic, P; Malde, S; Malik, S; Manca, G; Manousakis, A; Margaroli, F; Marino, C; Marino, C P; Martin, A; Martin, M; Martin, V; Martínez, M; Martínez-Ballarín, R; Maruyama, T; Mastrandrea, P; Masubuchi, T; Mattson, M E; Mazzanti, P; McFarland, K S; McIntyre, P; McNulty, R; Mehta, A; Mehtala, P; Menzemer, S; Menzione, A; Merkel, P; Mesropian, C; Messina, A; Miao, T; Miladinovic, N; Miles, J; Miller, R; Mills, C; Milnik, M; Mitra, A; Mitselmakher, G; Miyake, H; Moed, S; Moggi, N; Moon, C S; Moore, R; Morello, M; Movilla Fernandez, P; Mülmenstädt, J; Mukherjee, A; Muller, Th; Mumford, R; Murat, P; Mussini, M; Nachtman, J; Nagai, Y; Nagano, A; Naganoma, J; Nakamura, K; Nakano, I; Napier, A; Necula, V; Neu, C; Neubauer, M S; Nielsen, J; Nodulman, L; Norman, M; Norniella, O; Nurse, E; Oh, S H

    2008-09-19

    We search for pair production of doubly charged Higgs particles (H+/- +/-) followed by decays into electron-tau (etau) and muon-tau (mutau) pairs using data (350 pb(-1) collected from [over]pp collisions at sqrt[s]=1.96 TeV by the CDF II experiment. We search separately for cases where three or four final-state leptons are detected, and combine results for exclusive decays to left-handed etau (mutau) pairs. We set an H+/- +/- lower mass limit of 114(112) GeV/c(2) at the 95% confidence level. PMID:18851361

  18. Tau decays with one charged particle plus multiple pi0's

    Microsoft Academic Search

    M. Procario; S. Yang; R. Balest; K. Cho; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; M. Ogg; C. O'grady; J. R. Patterson; D. Peterson; D. Riley; M. Sapper; M. Selen; H. Worden; M. Worris; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; J. Yelton; D. Cinabro; S. Henderson; K. Kinoshita; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; N. Kwak; H. Lam; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'neill; V. Romero; H. Severini; C. R. Sun; M. M. Zoeller; G. Crawford; R. Fulton; K. K. Gan; H. Kagan; R. Kass; J. Lee; R. Malchow; F. Morrow; Y. Skovpen; M. Sung; C. White; J. Whitmore; P. Wilson; F. Butler; X. Fu; G. Kalbfleisch; M. Lambrecht; W. R. Ross; P. Skubic; J. Snow; P. L. Wang; M. Wood; D. Bortoletto; D. N. Brown; J. Dominick; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; S. F. Schaffner; E. I. Shibata; I. P. Shipsey; P. N. Wang; M. Battle; J. Ernst; H. Kroha; S. Roberts; K. Sparks; E. H. Thorndike; C. H. Wang; S. Sanghera; T. Skwarnicki; R. Stroynowski; M. Artuso; D. He; M. Goldberg; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; P. Rubin; S. Stone; M. Thulasidas; G. Vasseur; W. M. Yao; G. Zhu; A. V. Barnes; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; P. Sheldon; D. S. Akerib; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; J. Urheim; A. J. Weinstein; D. Acosta; M. Athanas; G. Masek; B. Ong; H. Paar; M. Sivertz; A. Bean; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; H. N. Nelson; J. D. Richman; H. Tajima; D. Schmidt; D. Sperka; M. S. Witherell

    1993-01-01

    With the CLEO-II detector at the Cornell Electron Storage Ring, we have measured branching fractions for tau lepton decay into one-prong final states with multiple pi0's B0hnpi, normalized to the branching fraction for tau decay into one charged particle and a single pi0. We find B0h2pi\\/B0hpi=0.345+\\/-0.006+\\/-0.016, B0h3pi\\/B0hpi=0.041 +\\/-0.003+\\/-0.005, and B0h4pi\\/B0hpi=0.006+\\/-0.002+\\/-0.002.

  19. Measurement of the semileptonic decays B-bar-->D tau - nu -bar tau and B-bar-->D* tau - nu -bar tau

    E-print Network

    Fisher, Peter H.

    We present measurements of the semileptonic decays B--->D0?-?[over-bar] ?, B--->D*0?-?[over-bar] ?, B? 0-->D+?-?? ?, and B? 0-->D*+?-?[over-bar] ?, which are sensitive to non-standard model amplitudes in certain scenarios. ...

  20. Likelihood-based Technique for measuring the Energy of Hadronically Decaying Tau Leptons

    NASA Astrophysics Data System (ADS)

    Elagin, Andrey; Safonov, Alexei; CDF Collaboration

    2009-04-01

    We present a new technique for accurate energy measurement of hadronically decaying tau leptons at the collider experiments. The technique employs a particle flow algorithm complemented with a likelihood-based method for separating contributions of overlapping energy depositions of spatially close particles. The technique was tested at CDF experiment at the Tevatron. In addition to superior energy resolution provided by the method and better measurement of other ID variables such as invariant mass of the jet, this technique provides a direct estimate of the uncertainty in the energy measurement of each individual tau candidate. While important in itself, this latter feature can serve as a powerful identification tool in distinguishing hadronically decaying tau leptons from jet and light lepton backgrounds. This new technique is expected to provide significant improvements in sensitivity of the H??? search at the Tevatron and can be further extended to the case of generic (quark or gluon) jets.

  1. Tau Lepton Reconstruction and Identification at ATLAS

    E-print Network

    Felix Friedrich

    2012-01-26

    Tau leptons play an important role in the physics program at the LHC. They are used in searches for new phenomena like the Higgs boson or Supersymmetry and in electroweak measurements. Identifying hadronically decaying tau leptons with good performance is an essential part of these analyses. We present the current status of the tau reconstruction and identification at the LHC with the ATLAS detector. The tau identification efficiencies and their systematic uncertainties are measured using W to tau nu and Z to tau tau events, and compared with the predictions from Monte Carlo simulations.

  2. Measurement of the Branching Fraction for D8+ rarr tau+nu_tau and Extraction of the Decay Constant f_D_s

    SciTech Connect

    Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Martinelli, M.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Battaglia, M.; Brown, D.N.; Hooberman, B.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; Tanabe, T.; /UC, Berkeley; Hawkes, C.M.; /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Indian Inst. Tech., Guwahati /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /INFN, Naples /Naples U. /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U. /Victoria U. /Warwick U. /Wisconsin U., Madison

    2010-06-04

    The branching fraction for the decay D{sub s}{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} with {tau}{sup +} {yields} e{sup +}{bar {nu}}{sub {tau}}, is measured using a data sample corresponding to an integrated luminosity of 427 fb{sup -1} collected at center of mass energies near 10.58 GeV with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at SLAC. In the process e{sup +}e{sup -} {yields} c{bar c} {yields} D*{sub s}{sup +} {bar D}{sub TAG}{bar K}X, the D*{sub s}{sup +} meson is reconstructed as a missing particle, and the subsequent decay D*{sub s}{sup +} {yields} D{sub s}{sup +}{gamma} yields an inclusive D{sub s}{sup +} data sample. Here {bar D}{sub TAG} refers to a fully reconstructed hadronic {bar D} decay, {bar K} is a K{sup -} or {bar K}{sup 0}, and X stands for any number of charged or neutral pions. The decay D{sub s}{sup +} {yields} K{sub S}{sup 0}K{sup +} is isolated also, and from ratio of event yields and known branching fractions, {Beta}(D{sub s}{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) = (4.5 {+-} 0.5 {+-} 0.4 {+-} 0.3)% is determined. The pseudoscalar decay constant is extracted to be f{sub D{sub s}} = (233 {+-} 13 {+-} 10 {+-} 7) MeV, where the first uncertainty is statistical, the second is systematic, and the third results from the uncertainties on the external measurements used as input to the calculation.

  3. A Search for the Rare Leptonic B- to tau- anti-neutrino Recoiling against B+ to Decays to anti-D*0 l+ Lepton-neutrino

    SciTech Connect

    Datta, Mousumi; /Wisconsin U., Madison

    2006-10-17

    This thesis describes a search for the decay B{sup -} {yields} {tau}{sup -}{bar {nu}}{sub {tau}} in 231.8 x 10{sup 6} {Upsilon}(4S) decays recorded with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed exclusive semi-leptonic B decay (B{sup +} {yields} {bar D}*{sup 0} {ell}{sup +}{nu}{sub {ell}}) is selected, and in the recoil a search for B{sup -} {yields} {tau}{sup -} {bar {nu}}{sub {tau}} signal is performed in the following {tau} decay modes: {tau}{sup -} {yields} e{sup -}{bar {nu}}{sub e}{nu}{sub {tau}}, {tau}{sup -} {yields} {mu}{sup -}{bar {nu}}{sub {mu}}{nu}{sub {tau}}, {tau}{sup -} {yields} {pi}{sup -}{nu}{sub {tau}}, {tau}{sup -} {yields} {pi}{sup -}{pi}{sup 0}{nu}{sub {tau}}, and {tau}{sup -} {yields} {pi}{sup -}{pi}{sup +}{pi}{sup -}{nu}{sub {tau}}. They find no evidence of signal, and they set a preliminary upper limit on the branching fraction of {beta}(B{sup -} {yields} {tau}{sup -}{bar {nu}}{sub {tau}}) < 2.8 x 10{sup -4} at the 90% confidence level (CL). This result is then combined with a statistically independent BABAR search for B{sup -} {yields} {tau}{sup -}{bar {nu}}{sub {tau}} to give a combined preliminary limit of {Beta}(B{sup -} {yields} {tau}{sup -}{bar {nu}}{sub {tau}}) < 2.6 x 10{sup -4} at 90% CL.

  4. Measurement of the branching fractions and the invariant mass distributions for {tau}{sup -{yields}}h{sup -}h{sup +}h{sup -{nu}}{sub {tau}}decays

    SciTech Connect

    Lee, M. J.; Kim, S. K.; Ryu, S. [Seoul National University, Seoul (Korea, Republic of); Aihara, H.; Iwasaki, M. [Department of Physics, University of Tokyo, Tokyo (Japan); Arinstein, K.; Aulchenko, V.; Bondar, A.; Eidelman, S.; Epifanov, D.; Gabyshev, N.; Garmash, A.; Kuzmin, A.; Poluektov, A.; Shebalin, V.; Shwartz, B.; Usov, Y.; Vinokurova, A.; Zhilich, V.; Zhulanov, V. [Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation); Novosibirsk State University, Novosibirsk (Russian Federation)

    2010-06-01

    We present a study of {tau}{sup -{yields}{pi}-{pi}+{pi}-{nu}}{sub {tau}}, {tau}{sup -{yields}}K{sup -{pi}+{pi}-{nu}}{sub {tau}}, {tau}{sup -{yields}}K{sup -}K{sup +{pi}-{nu}}{sub {tau}}, and {tau}{sup -{yields}}K{sup -}K{sup +}K{sup -{nu}}{sub {tau}} decays using a 666 fb{sup -1} data sample collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider at and near a center-of-mass energy of 10.58 GeV. The branching fractions are measured to be B({tau}{sup -{yields}{pi}-{pi}+{pi}-{nu}}{sub {tau}})=(8.42{+-}0.00{sub -0.25}{sup +0.26})x10{sup -2}, B({tau}{sup -{yields}}K{sup -{pi}+{pi}-{nu}}{sub {tau}})=(3.30{+-}0.01{sub -0.17}{sup +0.16})x10{sup -3}, B({tau}{sup -{yields}}K{sup -}K{sup +{pi}-{nu}}{sub {tau}})=(1.55{+-}0.01{sub -0.05}{sup +0.06})x10{sup -3}, and B({tau}{sup -{yields}}K{sup -}K{sup +}K{sup -{nu}}{sub {tau}})=(3.29{+-}0.17{sub -0.20}{sup +0.19})x10{sup -5}, where the first uncertainty is statistical and the second is systematic. These branching fractions do not include contributions from modes in which a {pi}{sup +{pi}-} pair originates from a K{sub S}{sup 0} decay. We also present the unfolded invariant mass distributions for these decays.

  5. Two current experimental problems in heavy lepton physics: tau decay modes and close mass pairs

    SciTech Connect

    Perl, M.L.

    1987-08-01

    This paper investigates tau lepton decay modes and close-mass lepton pairs. The major part of the paper discusses branching functions from experimental and theoretical viewpoints. Finally, the lack of experimental signatures of close-mass lepton pairs are reviewed. 15 refs., 2 figs., 11 tabs. (JDH)

  6. Discrimination of models including doubly charged scalar bosons by using tau lepton decay distributions

    E-print Network

    Hiroaki Sugiyama; Koji Tsumura; Hiroshi Yokoya

    2012-10-05

    The doubly charged scalar boson (H^{\\pm\\pm}) is introduced in several models of the new physics beyond the standard model. The H^{\\pm\\pm} has Yukawa interactions with two left-handed charged leptons or two right-handed charged leptons depending on the models. We study kinematical properties of H^{\\pm\\pm} decay products through tau leptons in order to discriminate the chiral structures of the new Yukawa interaction. The chirality of tau leptons can be measured by the energy distributions of the tau decay products, and thus the chiral structure of the new Yukawa interaction can be traced in the invariant-mass distributions of the H^{\\pm\\pm} decay products. We perform simulation studies for the typical decay patterns of the H^{\\pm\\pm} with simple event selections and tau-tagging procedures, and show that the chiral structure of the Yukawa interactions of H^{\\pm\\pm} can be distinguished by measuring the invariant-mass distributions.

  7. Ultrahigh Energy Tau Neutrinos

    E-print Network

    J. Jones; I. Mocioiu; M. H. Reno; I Sarcevic

    2005-07-30

    We study ultrahigh energy astrophysical neutrinos and the contribution of tau neutrinos from neutrino oscillations, relative to the contribution of the other flavors. We show the effect of tau neutrino regeneration and tau energy loss as they propagate through the Earth. We consider a variety of neutrino fluxes, such as cosmogenic neutrinos and neutrinos that originate in Active Galactic Nuclei. We discuss signals of tau neutrinos in detectors such as IceCube, RICE and ANITA.

  8. Study of the decay tau(-)->2 pi(-)pi(+)3 pi(0)nu(tau)

    E-print Network

    Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Hancock, N.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan

    1997-11-01

    VOLUME 79, NUMBER 20 PHYSICAL REVIEW LETTERS 17NOVEMBER 1997 Study of the Decay t 2 ! 2p 2 p 1 3p 0 n t S. Anderson, 1 Y. Kubota, 1 S J. Lee, 1 J.J. O?Neill, 1 S. Patton, 1 R. Poling, 1 T. Riehle, 1 V. Savinov, 1 A. Smith, 1 M.S. Alam, 2 S.B. Athar.... Wanke, 3 A. Wolf, 3 M.M. Zoeller, 3 B. Nemati, 4 S.J. Richichi, 4 W.R. Ross, 4 P. Skubic, 4 M. Bishai, 5 J. Fast, 5 J.W. Hinson, 5 N. Menon, 5 D.H. Miller, 5 E.I. Shibata, 5 I.P.J. Shipsey, 5 M. Yurko, 5 L. Gibbons, 6 S. Glenn, 6 S.D. Johnson, 6 Y. Kwon...

  9. Search for pair production of scalar top quarks decaying to a tau lepton and a b quark in 1.96-tev ppbar collisions

    E-print Network

    Khotilovich, Vadim Gennadyevich

    2009-05-15

    ~t1 decays into a tau lepton and a b quark, with branching ratio B, and search for final states containing either an electron or a muon from a leptonic tau decay, a hadronically decaying tau lepton, and two or more jets. Two candidate events pass my...

  10. Tau Physics from B Factories

    E-print Network

    G. D. Lafferty

    2006-10-10

    Some recent $\\tau$-physics results are presented from the BaBar and Belle experiments at the SLAC and KEK B factories, which produce copious numbers of $\\tau$-lepton pairs. Measurements of the tau mass and lifetime allow to test lepton universality and CPT invariance, while searches for lepton-flavour violation in tau decays are powerful ways to look for physics beyond the Standard Model. In semihadronic, non-strange tau decays, the vector hadronic final state is particularly important in helping determine the hadronic corrections to the anomalous magnetic moment of the muon, while studies of strange final states are the best available ways to measure the CKM matrix element $V_{\\rm us}$ and the mass of the strange quark.

  11. Search for Lepton Flavour Violation (LFV) in Three-Body Tau Decays at BaBar

    SciTech Connect

    Hodgkinson, M.; /Manchester U.

    2005-08-17

    The results of searches for Lepton Flavour Violating (LFV) decays at the BaBar detector located on the PEP-II collider, using data collected at an e{sup +}e{sup -} energy of 10.58 GeV, are presented. Upper limits at 90% Confidence Level (CL) are established in the range 1-3 x 10{sup -7} for six {tau} {yields} lll modes using 91.5 fb{sup -1} of data and in the range 0.7-4.8 x 10{sup -7} for fourteen {tau} {yields} lhh modes using 221.4 fb{sup -1} of data. The {tau} {yields} lhh results are preliminary.

  12. New results on the tau lepton

    SciTech Connect

    Gan, K.K.

    1987-11-01

    This is a review of new results on the tau lepton. The results include precise measurements of the lifetime, measurements of the decay tau/sup -/ ..-->.. ..pi../sup -/2..pi../sup 0/nu/sub tau/ with much improved precision, and limits on decay modes containing eta mesons, including the second-class-current decay tau/sup -/ ..-->.. ..pi../sup -/eta nu/sub tau/. The implications of these new results on the discrepancy in the one-charged-particle decay modes are discussed. 52 refs., 6 figs., 2 tabs.

  13. Search for High-Mass Resonances Decaying into Leptons of Different Flavor (e mu, e tau, mu tau) in p anti-p Collisions at sqrt(s) = 1.96 TeV

    SciTech Connect

    Tu, Yanjun; /Pennsylvania U.

    2008-10-01

    We present a search for high-mass resonances decaying into two leptons of different flavor: e{mu}, e{tau}, and {mu}{tau}. These resonances are predicted by several models beyond the standard model, such as the R-parity-violating MSSM. The search is based on 1 fb{sup -1} of data collected at the Collider Detector at Fermilab (CDF II) in proton anti-proton collisions. Our observations are consistent with the standard model expectations. The results are interpreted to set 95% C.L. upper limits on {sigma} x BR of {tilde {nu}}{sub {tau}} {yields} e{mu}, e{tau}, {mu}{tau}.

  14. Limits on tau lepton-flavor violating decays into three charged leptons

    Microsoft Academic Search

    J. P. Lees; V. Poireau; E. Prencipe; V. Tisserand; J. Garra Tico; E. Grauges; M. Martinelli; A. Palano; M. Pappagallo; G. Eigen; B. Stugu; L. Sun; M. Battaglia; D. N. Brown; B. Hooberman; L. T. Kerth; Yu. G. Kolomensky; G. Lynch; I. L. Osipenkov; T. Tanabe; C. M. Hawkes; N. Soni; A. T. Watson; H. Koch; T. Schroeder; D. J. Asgeirsson; C. Hearty; T. S. Mattison; J. A. McKenna; M. Barrett; A. Khan; A. Randle-Conde; V. E. Blinov; A. R. Buzykaev; V. P. Druzhinin; V. B. Golubev; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; E. P. Solodov; K. Yu. Todyshev; A. N. Yushkov; M. Bondioli; S. Curry; D. Kirkby; A. J. Lankford; P. Lund; M. Mandelkern; E. C. Martin; D. P. Stoker; H. Atmacan; J. W. Gary; F. Liu; O. Long; G. M. Vitug; Z. Yasin; V. Sharma; C. Campagnari; T. M. Hong; D. Kovalskyi; J. D. Richman; A. M. Eisner; C. A. Heusch; J. Kroseberg; W. S. Lockman; A. J. Martinez; T. Schalk; B. A. Schumm; A. Seiden; L. O. Winstrom; C. H. Cheng; D. A. Doll; B. Echenard; D. G. Hitlin; P. Ongmongkolkul; F. C. Porter; A. Y. Rakitin; R. Andreassen; M. S. Dubrovin; G. Mancinelli; B. T. Meadows; M. D. Sokoloff; P. C. Bloom; W. T. Ford; A. Gaz; J. F. Hirschauer; M. Nagel; U. Nauenberg; J. G. Smith; S. R. Wagner; R. Ayad; W. H. Toki; E. Feltresi; A. Hauke; H. Jasper; T. M. Karbach; J. Merkel; A. Petzold; B. Spaan; K. Wacker; M. J. Kobel; K. R. Schubert; R. Schwierz; D. Bernard; M. Verderi; P. J. Clark; S. Playfer; J. E. Watson; M. Andreotti; D. Bettoni; C. Bozzi; R. Calabrese; A. Cecchi; G. Cibinetto; E. Fioravanti; P. Franchini; E. Luppi; M. Munerato; M. Negrini; A. Petrella; L. Piemontese; V. Santoro; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; G. Finocchiaro; M. Nicolaci; S. Pacetti; P. Patteri; I. M. Peruzzi; M. Piccolo; M. Rama; A. Zallo; R. Contri; E. Guido; M. Lo Vetere; M. R. Monge; S. Passaggio; C. Patrignani; E. Robutti; S. Tosi; B. Bhuyan; M. Morii; A. Adametz; J. Marks; S. Schenk; U. Uwer; F. U. Bernlochner; H. M. Lacker; T. Lueck; A. Volk; P. D. Dauncey; M. Tibbetts; P. K. Behera; U. Mallik; C. Chen; J. Cochran; H. B. Crawley; L. Dong; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; Y. Y. Gao; A. V. Gritsan; Z. J. Guo; N. Arnaud; M. Davier; D. Derkach; J. Firmino da Costa; G. Grosdidier; F. Le Diberder; A. M. Lutz; B. Malaescu; P. Roudeau; M. H. Schune; J. Serrano; V. Sordini; A. Stocchi; L. Wang; G. Wormser; D. J. Lange; D. M. Wright; I. Bingham; J. P. Burke; C. A. Chavez; J. R. Fry; E. Gabathuler; R. Gamet; D. E. Hutchcroft; D. J. Payne; C. Touramanis; A. J. Bevan; F. di Lodovico; R. Sacco; M. Sigamani; G. Cowan; S. Paramesvaran; A. C. Wren; C. L. Davis; A. G. Denig; M. Fritsch; W. Gradl; A. Hafner; K. E. Alwyn; D. Bailey; R. J. Barlow; G. Jackson; G. D. Lafferty; T. J. West; J. Anderson; A. Jawahery; D. A. Roberts; G. Simi; J. M. Tuggle; C. Dallapiccola; E. Salvati; R. Cowan; D. Dujmic; P. H. Fisher; G. Sciolla; R. K. Yamamoto; M. Zhao; P. M. Patel; S. H. Robertson; M. Schram; P. Biassoni; A. Lazzaro; V. Lombardo; F. Palombo; S. Stracka; L. Cremaldi; R. Godang; R. Kroeger; P. Sonnek; D. J. Summers; H. W. Zhao; X. Nguyen; M. Simard; P. Taras; G. de Nardo; D. Monorchio; G. Onorato; C. Sciacca; G. Raven; H. L. Snoek; C. P. Jessop; K. J. Knoepfel; J. M. Losecco; W. F. Wang; L. A. Corwin; K. Honscheid; R. Kass; J. P. Morris; A. M. Rahimi; S. J. Sekula; N. L. Blount; J. Brau; R. Frey; O. Igonkina; J. A. Kolb; M. Lu; R. Rahmat; N. B. Sinev; D. Strom; J. Strube; E. Torrence; G. Castelli; N. Gagliardi; M. Margoni; M. Morandin; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; P. Del Amo Sanchez; E. Ben-Haim; G. R. Bonneaud; H. Briand; J. Chauveau; O. Hamon; Ph. Leruste; G. Marchiori; J. Ocariz; A. Perez; J. Prendki; S. Sitt; M. Biasini; E. Manoni; C. Angelini; G. Batignani; S. Bettarini; G. Calderini; M. Carpinelli; A. Cervelli; F. Forti; M. A. Giorgi; A. Lusiani; N. Neri; E. Paoloni; G. Rizzo; J. J. Walsh; D. Lopes Pegna; C. Lu; J. Olsen; A. J. S. Smith; A. V. Telnov; F. Anulli; E. Baracchini; G. Cavoto; R. Faccini; F. Ferrarotto; F. Ferroni; M. Gaspero; P. D. Jackson; L. Li Gioi; M. A. Mazzoni; G. Piredda; F. Renga; M. Ebert; T. Hartmann; T. Leddig; H. Schröder; R. Waldi; T. Adye; B. Franek; E. O. Olaiya; F. F. Wilson; S. Emery; G. Hamel de Monchenault; G. Vasseur; Ch. Yèche; M. Zito; M. T. Allen; D. Aston; D. J. Bard; R. Bartoldus; J. F. Benitez; C. Cartaro; R. Cenci; J. P. Coleman; M. R. Convery; J. C. Dingfelder; J. Dorfan; G. P. Dubois-Felsmann; W. Dunwoodie; R. C. Field; M. Franco Sevilla; B. G. Fulsom; A. M. Gabareen; M. T. Graham; P. Grenier; C. Hast; W. R. Innes; J. Kaminski; M. H. Kelsey; H. Kim; P. Kim; M. L. Kocian; D. W. G. S. Leith; S. Li; B. Lindquist; S. Luitz; V. Luth; H. L. Lynch; D. B. Macfarlane; H. Marsiske; R. Messner; D. R. Muller; H. Neal; S. Nelson; C. P. O'Grady; I. Ofte; M. Perl; B. N. Ratcliff; A. Roodman; A. A. Salnikov

    2010-01-01

    A search for the neutrinoless, lepton-flavor violating decay of the tau lepton into three charged leptons has been performed using an integrated luminosity of 468fb-1 collected with the BABAR detector at the PEP-II collider. In all six decay modes considered, the numbers of events found in data are compatible with the background expectations. Upper limits on the branching fractions are

  15. Confronting generalized hidden local symmetry chiral model with the ALEPH data on the decay {tau}{sup -{yields}{pi}+{pi}-{pi}-{nu}}{sub {tau}}

    SciTech Connect

    Achasov, N. N.; Kozhevnikov, A. A. [Laboratory of Theoretical Physics, S. L. Sobolev Institute for Mathematics, 630090, Novosibirsk (Russian Federation); Laboratory of Theoretical Physics, S.L. Sobolev Institute for Mathematics, and Novosibirsk State University, 630090, Novosibirsk (Russian Federation)

    2010-10-01

    The generalized hidden local symmetry (GHLS) model is the chiral model of pseudoscalar, vector, and axial vector mesons and their interactions. It contains also the couplings of strongly interacting particles with electroweak gauge bosons. Here, GHLS model is confronted with the ALEPH data on the decay {tau}{sup -{yields}{pi}-{pi}-{pi}+{nu}}{sub {tau}}. It is shown that the invariant mass spectrum of final pions in this decay calculated in GHLS framework with the single a{sub 1}(1260) resonance disagrees with the experimental data at any reasonable number of free GHLS parameters. Two modifications of GHLS model based on inclusion of two additional heavier axial vector mesons are studied. One of them, which gives a good description of the ALEPH data with all the parameters kept free, is shown to result in very large {Gamma}{sub a{sub 1}{sup {+-}}{sub {yields}{pi}}{sup {+-}}{sub {gamma}}}partial width. The other scheme with the GHLS parameters fixed in a way that the universality is preserved and the observed central value of {Gamma}{sub a{sub 1}{sup {+-}}{sub {yields}{pi}}{sup {+-}}{sub {gamma}}}is reached, which results in a good description of the three pion spectrum in {tau}{sup -{yields}{pi}+{pi}-{pi}-{nu}}{sub {tau}}decay.

  16. Tau longitudinal polarization in B{yields}D{tau}{nu} and its role in the search for the charged Higgs boson

    SciTech Connect

    Tanaka, Minoru; Watanabe, Ryoutaro [Department of Physics, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan)

    2010-08-01

    We study the longitudinal polarization of the tau lepton in B{yields}D{tau}{nu} decay. After discussing possible sensitivities of {tau} decay modes to the {tau} polarization, we examine the effect of charged Higgs boson on the {tau} polarization in B{yields}D{tau}{nu}. We find a relation between the decay rate and the {tau} polarization, and clarify the role of the {tau} polarization measurement in the search for the charged Higgs boson.

  17. The Tau Lepton and the Search for New Elementary Particle Physics

    SciTech Connect

    Perl, Martin L.

    1998-11-18

    This Fifth International WEIN Symposium is devoted to physics beyond the standard model. This talk is about tau lepton physics, but I begin with the question: do we know how to find new physics in the world of elementary particles? This question is interwoven with the various tau physics topics. These topics are: searching for unexpected tau decay modes; searching for additional tau decay mechanisms; radiative tau decays; tau decay modes of the W, B, and D; decay of the Z{sup 0} to tau pairs; searching for CP violation in tau decay; the tau neutrino, dreams and odd ideas in tau physics; and tau research facilities in the next decades.

  18. High Mass Tau Tau in CDF Run 2 Rutgers University

    E-print Network

    Fermilab

    High Mass Tau Tau in CDF Run 2 Zongru Wan Rutgers University DPF Meeting UC Riverside, Augest 28 region ­ �vis 120 GeV defined as signal region 3 #12;Tau Identification Definition of tau signal cone and isolation annulus signal isolationseed track not associated with tau candidate sig iso Visible Energy (Ge

  19. Tau Trigger at the ATLAS Experiment

    SciTech Connect

    Benslama, K.; Kalinowski, A.; /Regina U.; Belanger-Champange, C.; Brenner, R.; /Uppsala U.; Bosman, M.; Casado, P.; Osuna, C.; Perez, E.; Vorwerk, V.; /Barcelona, IFAE; Czyczula, Z.; Dam, M.; Xella, S.; /Copenhagen U.; Demers, S.; /SLAC; Farrington, S.; /Oxford U.; Igonkina, O.; /NIKHEF, Amsterdam; Kanaya, N.; Tsuno, S.; /Tokyo U.; Ptacek, E.; Reinsch, A.; Strom, David M.; Torrence, E.; /Oregon U. /Sydney U. /Lancaster U. /Birmingham U.

    2011-11-09

    Many theoretical models, like the Standard Model or SUSY at large tan({beta}), predict Higgs bosons or new particles which decay more abundantly to final states including tau leptons than to other leptons. At the energy scale of the LHC, the identification of tau leptons, in particular in the hadronic decay mode, will be a challenging task due to an overwhelming QCD background which gives rise to jets of particles that can be hard to distinguish from hadronic tau decays. Equipped with excellent tracking and calorimetry, the ATLAS experiment has developed tau identification tools capable of working at the trigger level. This contribution presents tau trigger algorithms which exploit the main features of hadronic tau decays and describes the current tau trigger commissioning activities. Many of the SM processes being investigated at ATLAS, as well as numerous BSM searches, contain tau leptons in their final states. Being able to trigger effectively on the tau leptons in these events will contribute to the success of the ATLAS experiment. The tau trigger algorithms and monitoring infrastructure are ready for the first data, and are being tested with the data collected with cosmic muons. The development of efficiency measurements methods using QCD and Z {yields} {tau}{tau} events is well advanced.

  20. TAUOLA for simulation of tau decay and production: perspectives for precision low energy and LHC applications

    E-print Network

    Zbigniew Was

    2011-01-09

    The status of Monte Carlo system for the simulation of tau-lepton production and decay in high-energy accelerator experiments is reviewed. Since previous tau-lepton conference in 2008 some practical modifications have been introduced: (i) For the TAUOLA Monte Carlo generator of tau-lepton decays, automated and simultaneous use of many versions of form-factors for the calculation of optional weights for fits was developped and checked to work in Belle and BaBar software environment. Work on alternative paramterizations of hadronic decays is advanced. (ii) the TAUOLA universal interface based on HepMC (the C++ event record) is now public. A similar interface for PHOTOS is now also public. (iii) Extension of PHOTOS Monte Carlo for QED bremsstrahlung in decays featuring kernels based on complete first order matrix element are gradually becoming widely available thanks to properites of the new, HepMC based interface. (iv) Tests of the programs systematized with the help of MC-TESTER are now available for FORTRAN and C++ users. Presented here results illustrate the status of the projects performed in collaboration with Nadia Davidson, Piotr Golonka, Gizo Nanava, Tomasz Przedzinski, Olga Shekhovtsova, El zbieta Richter-Was, Pablo Roig, Qingjun Xu and others.

  1. Evidence for an excess of B to D(*) Tau Nu decays

    SciTech Connect

    Lees, J.P.; Poireau, V.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Palano, A.; /Bari U. /INFN, Bari; Eigen, G.; Stugu, B.; /Bergen U.; Brown, David Nathan; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; /LBL, Berkeley /UC, Berkeley; Koch, H.; Schroeder, T.; /Ruhr U., Bochum; Asgeirsson, D.J.; Hearty, C.; Mattison, T.S.; McKenna, J.A.; So, R.Y.; /British Columbia U.; Khan, A.; /Brunel U.; Blinov, V.E.; /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /Ferrara U. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /Indian Inst. Tech., Guwahati /Harvard U. /Harvey Mudd Coll. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U., Comp. Sci. Dept. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /Milan U. /INFN, Milan /Mississippi U. /Montreal U. /Naples U. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U.; /more authors..

    2012-10-09

    Based on the full BABAR data sample, we report improved measurements of the ratios R(D{sup (*)}) = {Beta}({bar B} {yields} D{sup (*)} {tau}{sup -}{bar {nu}}{sub {tau}})/{Beta}({bar B} {yields} D{sup (*)} {ell}{sup -}{bar {nu}}{sub {ell}}), where {ell} is either e or {mu}. These ratios are sensitive to new physics contributions in the form of a charged Higgs boson. We measure R(D) = 0.440 {+-} 0.058 {+-} 0.042 and R(D*) = 0.332 {+-} 0.024 {+-} 0.018, which exceed the Standard Model expectations by 2.0{sigma} and 2.7{sigma}, respectively. Taken together, our results disagree with these expectations at the 3.4{sigma} level. This excess cannot be explained by a charged Higgs boson in the type II two-Higgs-doublet model. We also report the observation of the decay {bar B} {yields} D{tau}{sup -} {bar {nu}}{sub {tau}}, with a significance of 6.8{sigma}.

  2. Tau trigger at the ATLAS experiment

    E-print Network

    K. Benslama; C. Belanger-Champagne; M. Bosman; R. Brenner; P. Casado; Z. Czyczula; M. Dam; S. Demers; S. Farrington; O. Igonkina; A. Kalinowski; N. Kanaya; C. Osuna; E. Perez; E. Ptacek; A. Reinsch; A. Saavedra; A. Sfyrla; A. Sopczak; D. Strom; E. Torrence; S. Tsuno; V. Vorwerk; A. Watson; S. Xella

    2008-10-20

    Many theoretical models, like the Standard Model or SUSY at large tan(beta), predict Higgs bosons or new particles which decay more abundantly to final states including tau leptons than to other leptons. At the energy scale of the LHC, the identification of tau leptons, in particular in the hadronic decay mode, will be a challenging task due to an overwhelming QCD background which gives rise to jets of particles that can be hard to distinguish from hadronic tau decays. Equipped with excellent tracking and calorimetry, the ATLAS experiment has developed tau identification tools capable of working at the trigger level. This contribution presents tau trigger algorithms which exploit the main features of hadronic tau decays and describes the current tau trigger commissioning activities.

  3. Measurement of the tau-lepton mass

    Microsoft Academic Search

    R. Balest; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; C. D. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; M. Ogg; C. O'grady; J. R. Patterson; D. Peterson; D. Riley; M. Sapper; M. Selen; H. Worden; M. Worris; F. Wuerthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; J. Yelton; D. Cinabro; S. Henderson; K. Kinoshita; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; N. Kwak; H. Lam; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'neill; V. Romero; H. Severini; C. R. Sun; M. M. Zoeller; G. Crawford; R. Fulton; K. K. Gan; H. Kagan; R. Kass; J. Lee; R. Malchow; F. Morrow; Y. Skovpen; M. Sung; C. White; J. Whitmore; P. Wilson; F. Butler; X. Fu; G. Kalbfleisch; M. Lambrecht; W. R. Ross; P. Skubic; J. Snow; P. L. Wang; M. Wood; D. Bortoletto; D. N. Brown; J. Dominick; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; S. F. Schaffner; E. I. Shibata; I. P. Shipsey; P. N. Wang; M. Battle; J. Ernst; H. Kroha; S. Roberts; K. Sparks; E. H. Thorndike; C. H. Wang; S. Sanghera; T. Skwarnicki; R. Stroynowski; M. Artuso; M. Goldberg; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; S. Playfer; Y. Rozen; P. Rubin; S. Stone; M. Thulasidas; G. Zhu; A. V. Barnes; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; P. Sheldon; D. S. Akerib; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; J. Urheim; A. J. Weinstein; D. Acosta; M. Athanas; G. Masek; B. Ong; H. Paar; M. Sivertz; A. Bean; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; H. N. Nelson; J. D. Richman; H. Tajima; D. Schmidt; D. Sperka; M. S. Witherell; M. Procario; S. Yang

    1993-01-01

    Using data from the CLEO II detector at CESR, we measure the tau-lepton mass by exploiting the unique kinematics of events in which both tau's decay hadronically. The result is mtau=1777.8+\\/-0.7+\\/-1.7 MeV\\/c2. By comparing our result with other measurements near tau-pair threshold, we extract an upper limit on the tau-neutrino mass of 75 MeV\\/c2 at 95% confidence level.

  4. Measurement of tau polarisation at LEP

    Microsoft Academic Search

    M. Acciarri; O. Adriani; M. Aguilar-Benitez; S. Ahlen; J. Alcaraz; G. Alemanni; J. Allaby; A. Aloisio; M. G. Alviggi; G. Ambrosi; H. Anderhub; V. P. Andreev; T. Angelescu; F. Anselmo; A. Arefiev; T. Azemoon; T. Aziz; P. Bagnaia; L. Baksay; R. C. Ball; Sw Banerjee; K. Banicz; A. Barczyk; R. Barillère; L. Barone; P. Bartalini; A. Baschirotto; M. Basile; R. Battiston; A. Bay; F. Becattini; U. Becker; F. Behner; J. Berdugo; P. Berges; B. Bertucci; B. L. Betev; S. Bhattacharya; M. Biasini; A. Biland; G. M. Bilei; J. J. Blaising; S. C. Blyth; G. J. Bobbink; R. Bock; A. Böhm; L. Boldizsar; B. Borgia; D. Bourilkov; M. Bourquin; D. Boutigny; S. Braccini; J. G. Branson; V. Brigljevic; I. C. Brock; A. Buffini; A. Buijs; J. D. Burger; W. J. Burger; J. Busenitz; X. D. Cai; M. Campanelli; M. Capell; G. Cara Romeo; G. Carlino; A. M. Cartacci; J. Casaus; G. Castellini; F. Cavallari; N. Cavallo; C. Cecchi; M. Cerrada; F. Cesaroni; M. Chamizo; Y. H. Chang; U. K. Chaturvedi; S. V. Chekanov; M. Chemarin; A. Chen; G M Chen; H. F. Chen; H. S. Chen; M. Chen; G. Chiefari; C. Y. Chien; L. Cifarelli; F. Cindolo; C. Civinini; I. Clare; R. Clare; H. O. Cohn; G. Coignet; A. P. Colijn; N. Colino; S. Costantini; F. Cotorobai; B. de La Cruz; A. Csilling; T. S. Dai; R. D'Alessandro; R. de Asmundis; A. Degré; K. Deiters; P. Denes; F. Denotaristefani; D. Dibitonto; M. Diemoz; D. van Dierendonck; F. di Lodovico; C. Dionisi; M. Dittmar; A. Dominguez; A. Doria; M. T. Dova; E. Drago; D. Duchesneau; P. Duinker; I. Duran; S. Dutta; S. Easo; Yu. Efremenko; H. El Mamouni; A. Engler; F. J. Eppling; F. C. Erné; J. P. Ernenwein; P. Extermann; M. Fabre; R. Faccini; S. Falciano; A. Favara; J. Fay; O. Fedin; M. Felcini; B. Fenyi; T. Ferguson; F. Ferroni; H. Fesefeldt; E. Fiandrini; J. H. Field; F. Filthaut; P. H. Fisher; I. Fisk; G. Forconi; L. Fredj; K. Freudenreich; C. Furetta; Yu. Galaktionov; S. N. Ganguli; P. Garcia-Abia; S Gentile; J. Gerald; N. Gheordanescu; S Goldfarb; J. Goldstein; Z. F. Gong; A. Gougas; G. Gratta; M. W. Gruenewald; V. K. Gupta; A. Gurtu; L. J. Gutay; D. Haas; B. Hartmann; A. Hasan; D. Hatzifotiadou; T. Hebbeker; A. Hervé; J. Hirschfelder; W. C. van Hoek; H Hoorani; S. R. Hou; G. Hu; V. Innocente; K. Jenkes; B. N. Jin; L. W. Jones; P. de Jong; I. Josa-Mutuberria; A. Kasser; R. A. Khan; D. Kamrad; Yu. Kamyshkov; J. S. Kapustinsky; Y. Karyotakis; M N Kienzle-Focacci; D H Kim; J. K. Kim; S. C. Kim; W. W. Kinnison; A. Kirkby; D. Kirkby; J. Kirkby; D. Kiss; W. Kittel; A. Klimentov; A. C. König; A. Kopp; I. Korolko; V. Koutsenko; R. W. Kraemer; W. Krenz; A. Kunin; P. Lacentre; P. Ladron de Guevara; G. Landi; C. Lapoint; K. Lassila-Perini; P. Laurikainen; A. Lavorato; M. Lebeau; A. Lebedev; P Lecomte; P. Lecoq; P. Le Coultre; H. J. Lee; C. Leggett; J. M. Le Goff; R. Leiste; E. Leonardi; P. Levtchenko; C H Lin; W. T. Lin; F. L. Linde; L. Lista; Z. A. Liu; W. Lohmann; E. Longo; W. Lu; Y. S. Lu; K. Lübelsmeyer; C. Luci; D. Luckey; L. Luminari; W. Lustermann; W. G. Ma; M. Maity; G. Majumder; L. Malgeri; A. Malinin; C. Maña; D. Mangeol; S. Mangla; P. Marchesini; A. Marin; J. P. Martin; F. Marzano; G. G. G. Massaro; D. McNally; S. Mele; L. Merola; M. Meschini; W. J. Metzger; M. von der Mey; Y. Mi; D. Migani; A J W Van Mil; H. Milcent; G. Mirabelli; J. Mnich; P. Molnar; B. Monteleoni; R. Moore; T. Moulik; R. Mount; F. Muheim; A. J. M. Muijs; S. Nahn; M. Napolitano; F. Nessi-Tedaldi; H. Newman; T. Niessen; A Nisati; H. Nowak; Y. D. Oh; H. Opitz; G. Organtini; R. Ostonen; S. Palit; C. Palomares; D. Pandoulas; S. Paoletti; P. Paolucci; H. K. Park; I. H. Park; G Passaleva; S. Patricelli; T. Paul; M. Pauluzzi; C. Paus; F. Pauss; D. Peach; Y. J. Pei; S. Pensotti; D. Perret-Gallix; B. Petersen; S. Petrak; A. Pevsner; D. Piccolo; M. Pieri; P. A. Piroué; E. Pistolesi; V. Plyaskin; M. Pohl; V. Pojidaev; H. Postema; N. Produit; D O Prokofiev; J. Quartieri; G. Rahal-Callot; N. Raja; P. G. Rancoita; M. Rattaggi; G. Raven; P A Razis; K. Read; D. Ren; M. Rescigno; S. Reucroft; T. van Rhee; S. Riemann; K. Riles; O. Rind; A. Robohm; J. Rodin; B. P. Roe; L. Romero; S. Rosier-Lees; Ph. Rosselet; W. van Rossum; S. Roth; Juan Antonio Rubio; D. Ruschmeier; H. Rykaczewski; J. Salicio; E. Sanchez; M. P. Sanders; M. E. Sarakinos; S. Sarkar; G. Sauvage; C. Schäfer; V Shchegelskii; S. Schmidt-Kaerst; D. Schmitz; M. Schneegans; N. Scholz; Herwig Franz Schopper; D. J. Schotanus; J. Schwenke; G. Schwering; C. Sciacca; D. Sciarrino; L. Servoli; S. Shevchenko; N. Shivarov; V. Shoutko; J. Shukla; E. Shumilov; A V Shvorob; T. Siedenburg; D. Son; V. Soulimov; B. Smith; P. Spillantini; M. Steuer; D. P. Stickland; H. Stone; B. Stoyanov; A. Straessner; K. Sudhakar; G G Sultanov; L. Z. Sun; G. F. Susinno; H. Suter; J. D. Swain; X. W. Tang; Ludwig Tauscher; L. Taylor; Samuel C. C. Ting; S. M. Ting; S. C. Tonwar; J. Tóth; C. Tully

    1998-01-01

    Using the data collected with the L3 detector at LEP between 1990 and 1995, corresponding to an integrated luminosity of 149 pb-1, the tau longitudinal polarisation has been measured as a function of the production polar angle using the tau decays tau--->h-nutau (h=pi,rho,a1) and tau--->l- nu¯lnutau (l=e,mu). From this measurement the quantities Ae and Atau, which depend on the couplings

  5. Measurements of the kaon content in tau decays

    NASA Astrophysics Data System (ADS)

    Ronan, Michael T.

    1992-02-01

    Results on measurements of the kaon content in one-prong and three-prong ? decays are presented for data taken by the TPC/2? detector at PEP. Using a self-consistent procedure to measure exclusive and inclusive decays, the one-prong analysis extends previous work to kaon decay modes. Three-prong results K??, K? and KKK decay modes provide improved branching ratios and a first look at strange axial-vector couplings in ? decays.

  6. Search for the decay tau--->3pi-2pi+2pi0nutau

    Microsoft Academic Search

    B. Aubert; R. Barate; M. Bona; D. Boutigny; F. Couderc; Y. Karyotakis; J. P. Lees; V. Poireau; V. Tisserand; A. Zghiche; E. Grauges; A. Palano; M. Pappagallo; J. C. Chen; N. D. Qi; G. Rong; P. Wang; Y. S. Zhu; G. Eigen; I. Ofte; B. Stugu; G. S. Abrams; M. Battaglia; D. N. Brown; J. Button-Shafer; R. N. Cahn; E. Charles; C. T. Day; M. S. Gill; Y. Groysman; R. G. Jacobsen; J. A. Kadyk; L. T. Kerth; Yu. G. Kolomensky; G. Kukartsev; G. Lynch; L. M. Mir; P. J. Oddone; T. J. Orimoto; M. Pripstein; N. A. Roe; M. T. Ronan; W. A. Wenzel; M. Barrett; K. E. Ford; T. J. Harrison; A. J. Hart; C. M. Hawkes; S. E. Morgan; A. T. Watson; K. Goetzen; T. Held; H. Koch; B. Lewandowski; M. Pelizaeus; K. Peters; T. Schroeder; M. Steinke; J. T. Boyd; J. P. Burke; W. N. Cottingham; D. Walker; T. Cuhadar-Donszelmann; B. G. Fulsom; C. Hearty; N. S. Knecht; T. S. Mattison; J. A. McKenna; A. Khan; P. Kyberd; M. Saleem; L. Teodorescu; V. E. Blinov; A. D. Bukin; V. P. Druzhinin; V. B. Golubev; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; E. P. Solodov; K. Yu Todyshev; D. S. Best; M. Bondioli; M. Bruinsma; M. Chao; S. Curry; I. Eschrich; D. Kirkby; A. J. Lankford; P. Lund; M. Mandelkern; R. K. Mommsen; W. Roethel; D. P. Stoker; S. Abachi; C. Buchanan; S. D. Foulkes; J. W. Gary; O. Long; B. C. Shen; K. Wang; L. Zhang; H. K. Hadavand; E. J. Hill; H. P. Paar; S. Rahatlou; V. Sharma; J. W. Berryhill; C. Campagnari; A. Cunha; B. Dahmes; T. M. Hong; D. Kovalskyi; J. D. Richman; T. W. Beck; A. M. Eisner; C. J. Flacco; C. A. Heusch; J. Kroseberg; W. S. Lockman; G. Nesom; T. Schalk; B. A. Schumm; A. Seiden; P. Spradlin; D. C. Williams; M. G. Wilson; J. Albert; E. Chen; A. Dvoretskii; D. G. Hitlin; I. Narsky; T. Piatenko; F. C. Porter; A. Ryd; A. Samuel; R. Andreassen; G. Mancinelli; B. T. Meadows; M. D. Sokoloff; F. Blanc; P. C. Bloom; S. Chen; W. T. Ford; J. F. Hirschauer; A. Kreisel; U. Nauenberg; A. Olivas; W. O. Ruddick; J. G. Smith; K. A. Ulmer; S. R. Wagner; J. Zhang; A. Chen; E. A. Eckhart; A. Soffer; W. H. Toki; R. J. Wilson; F. Winklmeier; Q. Zeng; D. D. Altenburg; E. Feltresi; A. Hauke; H. Jasper; B. Spaan; T. Brandt; V. Klose; H. M. Lacker; W. F. Mader; R. Nogowski; A. Petzold; J. Schubert; K. R. Schubert; R. Schwierz; J. E. Sundermann; A. Volk; D. Bernard; G. R. Bonneaud; P. Grenier; E. Latour; Ch. Thiebaux; M. Verderi; D. J. Bard; P. J. Clark; W. Gradl; F. Muheim; S. Playfer; A. I. Robertson; Y. Xie; M. Andreotti; D. Bettoni; C. Bozzi; R. Calabrese; G. Cibinetto; E. Luppi; M. Negrini; A. Petrella; L. Piemontese; E. Prencipe; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; G. Finocchiaro; S. Pacetti; P. Patteri; I. M. Peruzzi; M. Piccolo; M. Rama; A. Zallo; A. Buzzo; R. Capra; R. Contri; M. Lo Vetere; M. M. Macri; M. R. Monge; S. Passaggio; C. Patrignani; E. Robutti; A. Santroni; S. Tosi; G. Brandenburg; K. S. Chaisanguanthum; M. Morii; J. Wu; R. S. Dubitzky; J. Marks; S. Schenk; U. Uwer; W. Bhimji; D. A. Bowerman; P. D. Dauncey; U. Egede; R. L. Flack; J. R. Gaillard; J. A. Nash; M. B. Nikolich; W. Panduro Vazquez; X. Chai; M. J. Charles; U. Mallik; N. T. Meyer; V. Ziegler; J. Cochran; H. B. Crawley; L. Dong; V. Eyges; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; A. V. Gritsan; M. Fritsch; G. Schott; N. Arnaud; M. Davier; G. Grosdidier; A. Höcker; F. Le Diberder; V. Lepeltier; A. M. Lutz; A. Oyanguren; S. Pruvot; S. Rodier; P. Roudeau; M. H. Schune; A. Stocchi; W. F. Wang; G. Wormser; C. H. Cheng; D. J. Lange; D. M. Wright; C. A. Chavez; I. J. Forster; J. R. Fry; E. Gabathuler; R. Gamet; K. A. George; D. E. Hutchcroft; D. J. Payne; K. C. Schofield; C. Touramanis; A. J. Bevan; F. Di Lodovico; W. Menges; R. Sacco; C. L. Brown; G. Cowan; H. U. Flaecher; D. A. Hopkins; P. S. Jackson; T. R. McMahon; S. Ricciardi; F. Salvatore; C. L. Davis; J. Allison; N. R. Barlow; R. J. Barlow; Y. M. Chia; C. L. Edgar; M. P. Kelly; G. D. Lafferty; M. T. Naisbit; J. C. Williams; J. I. Yi; C. Chen; W. D. Hulsbergen; A. Jawahery; C. K. Lae; D. A. Roberts; G. Simi; G. Blaylock; C. Dallapiccola; S. S. Hertzbach; X. Li; T. B. Moore; S. Saremi; H. Staengle; S. Y. Willocq; R. Cowan; K. Koeneke; G. Sciolla; S. J. Sekula; M. Spitznagel; F. Taylor; R. K. Yamamoto; H. Kim; P. M. Patel; C. T. Potter; S. H. Robertson; A. Lazzaro; V. Lombardo; F. Palombo; J. M. Bauer; L. Cremaldi; V. Eschenburg; R. Godang; R. Kroeger; J. Reidy; D. A. Sanders; D. J. Summers; H. W. Zhao; S. Brunet; D. Côté; M. Simard; P. Taras; F. B. Viaud; H. Nicholson; N. Cavallo; G. De Nardo; D. Del Re; F. Fabozzi; C. Gatto; L. Lista; D. Monorchio; P. Paolucci; D. Piccolo; C. Sciacca; M. Baak; H. Bulten; G. Raven; H. L. Snoek; C. P. Jessop; J. M. Losecco; T. Allmendinger; G. Benelli; K. K. Gan; K. Honscheid; D. Hufnagel; H. Kagan; R. Kass; T. Pulliam; A. M. Rahimi; R. Ter-Antonyan; Q. K. Wong; N. L. Blount; J. Brau; R. Frey

    2006-01-01

    A search for the decay of the tau lepton to five charged and two neutral pions is performed using data collected by the BABAR detector at the PEP-II asymmetric-energy e+e- collider. The analysis uses 232fb-1 of data at center-of-mass energies on or near the Upsilon(4S) resonance. We observe 10 events with an expected background of 6.5-1.4+2.0 events. In the absence

  7. Unparticle-induced lepton flavor violating decays tau-->l(V,P)

    Microsoft Academic Search

    Zuo-Hong Li; Ying Li; Hong-Xia Xu

    2009-01-01

    We make an evaluation of the lepton flavor violating (LFV) decays tau-->l(V,P), where l=e or mu and V(P) is a neutral vector (pseudo-scalar) meson, in the context of unparticle physics. The constraints are investigated systematically on the related coupling parameters from all the available experimental data, and the parameter values are specified appropriately. The results show that whereas over the

  8. Search for CP Violation in $\\tau$ And D Decays With a $K^0_S$ in the Final State

    SciTech Connect

    Martinelli, Maurizio; /Bari U. /INFN, Bari /SLAC

    2012-09-14

    I report the recent searches for CP violation in {tau} and D decays including a K{sub s}{sup 0} in the final state. The analyses herein shown are based on data samples recorded by BABAR and Belle experiments. A brief introduction on CP violation is followed by the summary of the experimental techniques and the results obtained for {tau} and D decays, respectively. Finally, an outlook on future development is provided.

  9. Search for CP violation in tau and D decays with a K0S in the final state

    E-print Network

    Maurizio Martinelli

    2011-08-31

    I report the recent searches for CP violation in tau and D decays including a K0S in the final state. The analyses herein shown are based on data samples recorded by BaBar and Belle experiments. A brief introduction on CP violation is followed by the summary of the experimental techniques and the results obtained for tau and D decays, respectively. Finally, an outlook on future development is provided.

  10. Tau physics at the LHC with ATLAS

    E-print Network

    Stan Lai; for the ATLAS Collaboration

    2009-10-25

    The presence of tau leptons in the final state is an important signature in searches for physics beyond the Standard Model. Hadronically decaying tau leptons can be reconstructed over a wide kinematic range at ATLAS. The reconstruction algorithm for hadronically decaying tau leptons and the performance of tau lepton identification is described. A review of physics processes with tau lepton final states is given, ranging from Standard Model processes in early data, such as W and Z boson production, to searches for new phenomena beyond the Standard Model.

  11. Measurement of the {tau} Lepton Mass and an Upper Limit on the Mass Difference between {tau}{sup +} and {tau}{sup -}

    SciTech Connect

    Belous, K.; Shapkin, M.; Sokolov, A. [Institute of High Energy Physics, Protvino (Russian Federation); Abe, K.; Adachi, I.; Gershon, T.; Haba, J.; Hazumi, M.; Itoh, R.; Iwasaki, Y.; Katayama, N.; Kichimi, H.; Krokovny, P.; Nakao, M.; Nakazawa, H.; Nishida, S.; Ozaki, H.; Sakai, Y.; Suzuki, S. Y.; Takasaki, F. [High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)] (and others)

    2007-07-06

    The mass of the {tau} lepton has been measured in the decay mode {tau}{yields}3{pi}{nu}{sub {tau}} using a pseudomass technique. The result obtained from 414 fb{sup -1} of data collected with the Belle detector is M{sub {tau}}=[1776.61{+-}0.13(stat){+-}0.35(sys)] MeV/c{sup 2}. The upper limit on the relative mass difference between positive and negative {tau} leptons is vertical bar M{sub {tau}{sup +}}-M{sub {tau}{sup -}} vertical bar/M{sub {tau}}<2.8x10{sup -4} at 90% confidence level.

  12. Rare and forbidden B and tau decays in the Belle

    NASA Astrophysics Data System (ADS)

    Hyun, Hyo Jung; Belle Collaboration

    2014-11-01

    A search for the purely leptonic decays B+ ? e+ve and B+ ? ?+v? was performed using the 772 million Bbar B pairs collected by the Belle detector at the KEKB asymmetric-energy e+e? collider. There was no evidence of a signal in either decay modes. A heavy neutral leptonlike new particle and heavy neutrino searches were also performed, but no significant signals were observed. Lepton flavor violation in ? decays was studied with an almost full data sample and the upper limits obtained were in the order of 10?8. In this paper, recent results that can give any constraints to new physics are briefly described.

  13. Measurement of the tau lifetime

    SciTech Connect

    Jaros, J.A.

    1982-10-01

    If the tau lepton couples to the charged weak current with universal strength, its lifetime can be expressed in terms of the muon's lifetime, the ratio of the masses of the muon and the tau, and the tau's branching ratio into e anti nu/sub e/ nu/sub tau/ as tau/sub tau/ = tau/sub ..mu../ (m/sub ..mu..//m/sub tau/)/sup 5/ B(tau ..-->.. e anti nu/sub e/nu/sub tau/) = 2.8 +- 0.2 x 10/sup -13/ s. This paper describes the measurement of the tau lifetime made by the Mark II collaboration, using a new high precision drift chamber in contunction with the Mark II detector at PEP. The results of other tau lifetime measurements are summarized.

  14. Measurements of Charged Current Lepton Universality and |Vus| using Tau Lepton Decays to e- v v, __- v v, pi- v and K- v

    SciTech Connect

    Aubert, Bernard; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Martinelli, M.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Battaglia, M.; Brown, D.N.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /INFN, Naples /Naples U. /INFN, Naples /INFN, Naples /Naples U. /NIKHEF, Amsterdam /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /Pennsylvania U. /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U. /Victoria U. /Warwick U. /Wisconsin U., Madison

    2011-06-30

    Using 467 fb{sup -1} of e{sup +}e{sup -} annihilation data collected with the BABAR detector, they measure {Beta}({tau}{sup -} {yields} {mu}{sup -}{bar {nu}}{sub {mu}}{nu}{sub {tau}})/{Beta}({tau}{sup -} {yields} e{sup -} {bar {nu}}{sub e}{nu}{sub {tau}}) = (0.9796 {+-} 0.0016 {+-} 0.0036), {Beta}({tau}{sup -} {yields} {pi}{sup -} {nu}{sub {tau}})/{Beta}({tau}{sup -} {yields} e{sup -}{bar {nu}}{sub e}{nu}{sub {tau}}) = (0.5945 {+-} 0.0014 {+-} 0.0061), and {Beta}({tau}{sup -} {yields} K{sup -}{nu}{sub {tau}})/{Beta}({tau}{sup -} {yields} e{sup -}{bar {nu}}{sub e}{nu}{sub {tau}}) = (0.03882 {+-} 0.00032 {+-} 0.00057), where the uncertainties are statistical and systematic, respectively. From these precision {tau} measurements, they test the Standard Model assumption of {mu}-e and {tau}-{mu} charge current lepton universality and provide determinations of |V{sub us}| experimentally independent of the decay of a kaon.

  15. Selected Topics in Tau Physics from BaBar

    SciTech Connect

    Paramesvaran, S.; /Royal Holloway, U. of London; ,

    2012-04-06

    Selected results from {tau} analyses performed using the BABAR detector at the SLAC National Accelerator Laboratory are presented. A precise measurement of the {tau} mass and the {tau}{sup +}{tau}{sup -} mass difference is undertaken using the hadronic decay mode {tau}{sup {+-}} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup {+-}}{nu}{sub {tau}}. In addition an investigation into the strange decay modes {tau}{sup -} {yields} K{sub S}{sup 0}{pi}{sup -}{pi}{sup 0}{nu}{sub {tau}} and {tau}{sup -} {yields} K{sub S}{sup 0}{pi}{sup -}{nu}{sub {tau}} is also presented, including a fit to the {tau}{sup -} {yields} K{sub S}{sup 0}{pi}{sup -}{nu}{sub {tau}} invariant mass spectrum. Precise values for M(K*(892)) and {Lambda}(K*(892)) are obtained.

  16. V_us (and m_s) From Hadronic Tau Decays

    E-print Network

    K. Maltman; C. E. Wolfe

    2007-03-30

    We describe how complications encountered in the extraction of V_us from flavor-breaking hadronic tau decay sum rules, in particular those associated with the slower than previously anticipated convergence of the relevant D=2 OPE series, can be successfully dealt with through judicious choices of sum rule weight. Problems with the previously proposed ``(0,0) spectral weight'' version of the analysis, and the much improved situation produced by the use of a number of alternate, non-spectral-weights, are demonstrated. The method is shown to promise a sub-0.0010-accuracy determination of V_us once analysis of the improved strange spectral data from BABAR and BELLE is completed. Connections to the tau versus electroproduction puzzle in the evaluation of the leading order hadronic contribution to (g-2)_mu are also discussed.

  17. Observation of radiative leptonic decay of the tau lepton

    E-print Network

    Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhao, X.

    2000-01-01

    energy photons near muons, and is accounted for in the systematic error estimation. Using Monte Carlo produced t-pairs in which one t decays radiatively into a lepton and neutrinos and the other t decays generically, we determine the total detection...] S. Jadach, E. Richter-Was, B. F. L. Ward, and Z. Was, Phys. Lett. B 268, 253 (1991). [11] V. M. Budnev et al., Phys. Rep. 15, 181 (1975). [12] J. Vermaseren, Nucl. Phys. B229, 347 (1983). [13] D. Y. Wu et al., Phys. Rev. D 41, 2339 (1990). [14] OPAL...

  18. Search for LFV in Tau- to L- L+ L- Decays at BaBar

    SciTech Connect

    Giorgi, Marcello A.; /Pisa U. /INFN, Pisa

    2011-11-30

    We report the results of search for the neutrinoless lepton-flavor violating decay of the tau lepton into three charged leptons, performed using 376 fb{sup -1} of data collected at an e{sup +}e{sup -} center-of-mass energy around 10.58 GeV with the BaBar detector at the PEP-II. In all six decay modes considered, the number of events found in data are compatible with the background expectations. Upper limits on the branching fractions are set in the range (4-8) x 10{sup -8} at 90% confidence level.

  19. Limits on tau lepton flavor violating decays in three charged leptons

    SciTech Connect

    Cervelli, Alberto

    2010-04-29

    A search for the neutrinoless, lepton-flavor violating decay of the {tau} lepton into three charged leptons has been performed using an integrated luminosity of 468 fb{sup -1} collected with the BABAR detector at the PEP-II collider. In all six decay modes considered, the numbers of events found in data are compatible with the background expectations. Upper limits on the branching fractions are set in the range (1.8-3.3) x 10{sup -8} at 90% confidence level.

  20. Measurement of the lifetime of the tau lepton

    Microsoft Academic Search

    M. Acciarri; O. Adriani; M. Aguilar-Benitez; S P Ahlen; B. Alpat; J. Alcaraz; G. Alemanni; James V Allaby; A. Aloisio; G. Alverson; M. G. Alviggi; G. Ambrosi; H. Anderhub; V. P. Andreev; T. Angelescu; F. Anselmo; D. Antreasyan; A. Arefiev; T. Azemoon; T. Aziz; P. Bagnaia; L. Baksay; R. C. Ball; S. Banerjee; K. Banicz; R. Barillère; L. Barone; P. Bartalini; A. Baschirotto; M. Basile; R. Battiston; A. Bay; F. Becattini; U. Becker; F. Behner; J. Berdugo; P. Berges; B. Bertucci; B. L. Betev; S. Bhattacharya; M. Biasini; A. Biland; G. M. Bilei; J. J. Blaising; S. C. Blyth; Gerjan J Bobbink; R K Böck; A. Böhm; B. Borgia; A. Boucham; D. Bourilkov; Maurice Bourquin; D. Boutigny; J. G. Branson; V. Brigljevic; I. C. Brock; A. Buffini; A. Buijs; J. D. Burger; W. J. Burger; J K Busenitz; A O Buytenhuijs; X. D. Cai; M. Campanelli; M. Capell; G. Cara Romeo; M. Caria; G. Carlino; A. M. Cartacci; J. Casaus; G. Castellini; F. Cavallari; N. Cavallo; C. Cecchi; M Cerrada-Canales; F. Cesaroni; M Chamizo-Llatas; A. Chan; Y. H. Chang; U. K. Chaturvedi; M. Chemarin; A. Chen; G. Chen; H. F. Chen; H. S. Chen; M. Chen; G. Chiefari; C. Y. Chien; M. T. Choi; Luisa Cifarelli; F. Cindolo; C. Civinini; I. Clare; R. Clare; H. O. Cohn; G. Coignet; A. P. Colijn; N. Colino; S. Costantini; F. Cotorobai; B. de la Cruz; Akos Csilling; T. S. Dai; R. D'Alessandro; R. de Asmundis; H. De Boeck; A. Degré; K. Deiters; P. Denes; F. Denotaristefani; Daryl DiBitonto; M. Diemoz; D N Van Dierendonck; F. Di Lodovico; C. Dionisi; Michael Dittmar; A. Dominguez; A. Doria; I. Dorne; M. T. Dova; E. Drago; D. Duchesneau; P. Duinker; I. Duran; S. Dutta; S. Easo; Yu V Efremenko; H. El Mamouni; A. Engler; F. J. Eppling; F. C. Erné; J. P. Ernenwein; Pierre Extermann; M. Fabre; R. Faccini; S. Falciano; A. Favara; J. Fay; O. Fedin; Marta Felcini; B. Fenyi; T. Ferguson; D. Fernandez; F. Ferroni; H S Fesefeldt; E. Fiandrini; J. H. Field; Frank Filthaut; P. H. Fisher; G. Forconi; L. Fredj; Klaus Freudenreich; C. Furetta; Yu. Galaktionov; S. N. Ganguli; P. Garcia-Abia; S. S. Gau; S. Gentile; J. Gerald; N. Gheordanescu; S. Giagu; S. Goldfarb; J. Goldstein; Z. F. Gong; Andreas Gougas; Giorgio Gratta; M. W. Gruenewald; V. K. Gupta; A. Gurtu; L. J. Gutay; K. Hangarter; B. Hartmann; A. Hasan; D. Hatzifotiadou; T. Hebbeker; A. Hervé; W. C. van Hoek; H. Hofer; H. Hoorani; S. R. Hou; G. Hu; Vincenzo Innocente; H. Janssen; B. N. Jin; L. W. Jones; P. de Jong; I. Josa-Mutuberria; A. Kasser; R. A. Khan; Yu A Kamyshkov; P. Kapinos; J. S. Kapustinsky; Yu Karyotakis; M. Kaur; M. N. Kienzle-Focacci; D. Kim; J. K. Kim; S. C. Kim; Y. G. Kim; W. W. Kinnison; A. Kirkby; D. Kirkby; Jasper Kirkby; D. Kiss; W. Kittel; A. Klimentov; A. C. König; I. Korolko; V F Koutsenko; R. W. Kraemer; W. Krenz; H. Kuijten; A. Kunin; P. Ladron de Guevara; G. Landi; C. Lapoint; K M Lassila-Perini; P. Laurikainen; M. Lebeau; A. Lebedev; P. Lebrun; P. Lecomte; P. Lecoq; P. Le Coultre; J. S. Lee; K. Y. Lee; C. Leggett; J. M. Le Goff; R. Leiste; E. Leonardi; P. Levtchenko; Li Chuan; E H Lieb; W. T. Lin; Frank L Linde; L. Lista; Z. A. Liu; W. Lohmann; E. Longo; W. Lu; Y. S. Lu; K. Lübelsmeyer; C. Luci; D. Luckey; L. Luminari; W. Lustermann; W. G. Ma; M. Maity; G. Majumder; L. Malgeri; A. Malinin; C. Maña; S. Mangla; P A Marchesini; A. Marin; J. P. Martin; F. Marzano; G. G. G. Massaro; D. McNally; S. Mele; L. Merola; M. Meschini; W. J. Metzger; M. von der Mey; Y. Mi; A. Mihul; A. J. W. van Mil; G. Mirabelli; J. Mnich; P. Molnar; B. Monteleoni; R. Moore; S. Morganti; T. Moulik; R. Mount; S. Müller; F. Muheim; E. Nagy; S. Nahn; M. Napolitano; F. Nessi-Tedaldi; H. Newman; A. Nippe; H. Nowak; G. Organtini; R. Ostonen; D. Pandoulas; S. Paoletti; P. Paolucci; H. K. Park; G. Pascale; G. Passaleva; S. Patricelli; T. Paul; M. Pauluzzi; C. Paus; Felicitas Pauss; D. Peach; Y. J. Pei; S. Pensotti; D. Perret-Gallix; S. Petrak; A. Pevsner; D. Piccolo; M. Pieri; J. C. Pinto; P. A. Piroué; E. Pistolesi; V. Plyaskin; M. Pohl; V Pozhidaev; H. Postema; N. Produit; D. Prokofiev; G. Rahal-Callot; P. G. Rancoita; M. Rattaggi; G. Raven; P. Razis; K. Read; D. Ren; M. Rescigno; S. Reucroft; T. van Rhee; S. Riemann; B. C. Riemers; K. Riles; O. Rind; S. Ro; A. Robohm; J. Rodin; F. J. Rodriguez; B. P. Roe; S. Röhner; L. Romero; S. Rosier-Lees; Ph. Rosselet; W. van Rossum; S. Roth; J. A. Rubio; H. Rykaczewski; J. Salicio; E. Sanchez; A. Santocchia; M. E. Sarakinos; S. Sarkar; M. Sassowsky; G. Sauvage; C. Schäfer; V. Schegelsky; S. Schmidt-Kaerst; D. Schmitz; P. Schmitz; M. Schneegans; B. Schoeneich; N. Scholz; H. Schopper; D. J. Schotanus; J. Schwenke; G. Schwering; C. Sciacca; D. Sciarrino; J. C. Sens; L. Servoli; S. Shevchenko; N. Shivarov; V. Shoutko; J. Shukla; E. Shumilov; A. Shvorob; T. Siedenburg; D. Son; A. Sopczak; V. Soulimov; B. Smith; P. Spillantini; M. Steuer

    1996-01-01

    The lifetime of the tau lepton is measured using data collected in 1994 by the L3 detector at LEP. The precise track position information of the Silicon Microvertex Detector is exploited. The tau lepton lifetime is determined from the signed impact parameter distribution for 30322 tau decays into one charged particle and from the decay length distribution for 3891 tau

  1. tau physics at B-factories

    E-print Network

    O. Igonkina

    2006-06-02

    Today the B-factories BaBar and Belle have accumulated largest samples of tau-tau events and are competing to be called tau-factories. Among the problems to be tested and measurements to be done by BaBar and Belle are check of CP and CPT invariance in tau decays, measurement of strange and non-strange spectral functions, extraction of mass of strange quark and |V_us|, searches for lepton flavor violation processes. In this paper, the latest results in tau physics by these two experiments and measurements to be done within next few years are reviewed.

  2. Search for Higgs Bosons Decaying to Tau Pairs in p pmacr Collisions with the D0 Detector

    Microsoft Academic Search

    V. M. Abazov; B. Abbott; M. Abolins; B. S. Acharya; M. Adams; T. Adams; E. Aguilo; S. H. Ahn; M. Ahsan; G. D. Alexeev; G. Alkhazov; A. Alton; G. Alverson; G. A. Alves; M. Anastasoaie; L. S. Ancu; T. Andeen; S. Anderson; B. Andrieu; M. S. Anzelc; M. Aoki; Y. Arnoud; M. Arthaud; A. Askew; B. Åsman; A. C. S. Assis Jesus; O. Atramentov; C. Avila; F. Badaud; A. Baden; L. Bagby; B. Baldin; D. V. Bandurin; P. Banerjee; S. Banerjee; E. Barberis; A.-F. Barfuss; P. Bargassa; P. Baringer; J. Barreto; J. F. Bartlett; U. Bassler; D. Bauer; S. Beale; A. Bean; M. Begalli; M. Begel; C. Belanger-Champagne; L. Bellantoni; A. Bellavance; J. A. Benitez; S. B. Beri; G. Bernardi; R. Bernhard; I. Bertram; M. Besançon; R. Beuselinck; V. A. Bezzubov; P. C. Bhat; V. Bhatnagar; C. Biscarat; G. Blazey; F. Blekman; S. Blessing; D. Bloch; K. Bloom; A. Boehnlein; D. Boline; T. A. Bolton; E. E. Boos; G. Brooijmans; T. Bose; A. Brandt; R. Brock; A. Bross; D. Brown; N. J. Buchanan; D. Buchholz; M. Buehler; V. Buescher; V. Bunichev; S. Burdin; S. Burke; T. H. Burnett; C. P. Buszello; J. M. Butler; P. Calfayan; S. Chakrabarti; J. Cammin; W. Carvalho; B. C. K. Casey; H. Castilla-Valdez; D. Chakraborty; K. Chan; A. Chandra; F. Charles; E. Cheu; F. Chevallier; D. K. Cho; S. Choi; B. Choudhary; L. Christofek; T. Christoudias; S. Cihangir; D. Claes; J. Clutter; M. Cooke; W. E. Cooper; M.-C. Cousinou; F. Couderc; S. Crépé-Renaudin; D. Cutts; M. Cwiok; H. da Motta; A. Das; G. Davies; K. de; S. J. de Jong; E. de La Cruz-Burelo; C. de Oliveira Martins; J. D. Degenhardt; F. Déliot; M. Demarteau; R. Demina; D. Denisov; S. P. Denisov; S. Desai; H. T. Diehl; M. Diesburg; A. Dominguez; H. Dong; L. V. Dudko; L. Duflot; S. R. Dugad; D. Duggan; A. Duperrin; J. Dyer; A. Dyshkant; M. Eads; D. Edmunds; J. Ellison; V. D. Elvira; Y. Enari; S. Eno; P. Ermolov; H. Evans; A. Evdokimov; V. N. Evdokimov; A. V. Ferapontov; T. Ferbel; F. Fiedler; F. Filthaut; W. Fisher; H. E. Fisk; M. Fortner; H. Fox; S. Fu; S. Fuess; T. Gadfort; C. F. Galea; E. Gallas; C. Garcia; A. Garcia-Bellido; V. Gavrilov; P. Gay; W. Geist; D. Gelé; C. E. Gerber; Y. Gershtein; D. Gillberg; G. Ginther; N. Gollub; B. Gómez; A. Goussiou; P. D. Grannis; H. Greenlee; Z. D. Greenwood; E. M. Gregores; G. Grenier; Ph. Gris; J.-F. Grivaz; A. Grohsjean; S. Grünendahl; M. W. Grünewald; F. Guo; J. Guo; G. Gutierrez; P. Gutierrez; A. Haas; N. J. Hadley; P. Haefner; S. Hagopian; J. Haley; I. Hall; R. E. Hall; L. Han; K. Harder; A. Harel; J. M. Hauptman; R. Hauser; J. Hays; T. Hebbeker; D. Hedin; J. G. Hegeman; A. P. Heinson; U. Heintz; C. Hensel; K. Herner; G. Hesketh; M. D. Hildreth; R. Hirosky; J. D. Hobbs; B. Hoeneisen; H. Hoeth; M. Hohlfeld; S. J. Hong; S. Hossain; P. Houben; Y. Hu; Z. Hubacek; V. Hynek; I. Iashvili; R. Illingworth; A. S. Ito; S. Jabeen; M. Jaffré; S. Jain; K. Jakobs; C. Jarvis; R. Jesik; K. Johns; C. Johnson; M. Johnson; A. Jonckheere; P. Jonsson; A. Juste; E. Kajfasz; J. M. Kalk; D. Karmanov; P. A. Kasper; I. Katsanos; D. Kau; V. Kaushik; R. Kehoe; S. Kermiche; N. Khalatyan; A. Khanov; A. Kharchilava; Y. M. Kharzheev; D. Khatidze; T. J. Kim; M. H. Kirby; M. Kirsch; B. Klima; J. M. Kohli; J.-P. Konrath; A. V. Kozelov; J. Kraus; D. Krop; T. Kuhl; A. Kumar; A. Kupco; T. Kurca; V. A. Kuzmin; J. Kvita; F. Lacroix; D. Lam; S. Lammers; G. Landsberg; P. Lebrun; W. M. Lee; A. Leflat; J. Lellouch; J. Leveque; J. Li; L. Li; Q. Z. Li; S. M. Lietti; J. G. R. Lima; D. Lincoln; J. Linnemann; V. V. Lipaev; R. Lipton; Y. Liu; Z. Liu; A. Lobodenko; M. Lokajicek; P. Love; H. J. Lubatti; R. Luna; A. L. Lyon; A. K. A. Maciel; D. Mackin; R. J. Madaras; P. Mättig; C. Magass; A. Magerkurth; P. K. Mal; H. B. Malbouisson; S. Malik; V. L. Malyshev; H. S. Mao; Y. Maravin; B. Martin; R. McCarthy; A. Melnitchouk; L. Mendoza; P. G. Mercadante; M. Merkin; K. W. Merritt; A. Meyer; J. Meyer; T. Millet; J. Mitrevski; R. K. Mommsen; N. K. Mondal; R. W. Moore; T. Moulik; G. S. Muanza; M. Mulhearn; O. Mundal; L. Mundim; E. Nagy; M. Naimuddin; M. Narain; N. A. Naumann; H. A. Neal; J. P. Negret; P. Neustroev; H. Nilsen; H. Nogima; S. F. Novaes; T. Nunnemann; V. O'Dell; D. C. O'Neil; G. Obrant; C. Ochando; D. Onoprienko; N. Oshima; N. Osman; J. Osta; R. Otec; G. J. Otero Y Garzón; M. Owen; P. Padley; M. Pangilinan; N. Parashar; S.-J. Park; S. K. Park; J. Parsons; R. Partridge; N. Parua; A. Patwa; G. Pawloski; B. Penning; M. Perfilov; K. Peters; Y. Peters; P. Pétroff; M. Petteni; R. Piegaia; J. Piper; M.-A. Pleier; P. L. M. Podesta-Lerma; V. M. Podstavkov; Y. Pogorelov; M.-E. Pol; P. Polozov; B. G. Pope; A. V. Popov; C. Potter; W. L. Prado da Silva; H. B. Prosper; S. Protopopescu; J. Qian; A. Quadt; B. Quinn; A. Rakitine; M. S. Rangel; K. Ranjan; P. N. Ratoff; P. Renkel; S. Reucroft; P. Rich; J. Rieger; M. Rijssenbeek; I. Ripp-Baudot; F. Rizatdinova; S. Robinson; R. F. Rodrigues; M. Rominsky

    2008-01-01

    We present a search for the production of neutral Higgs bosons varphi decaying into tau+tau- final states in p pmacr collisions at a center-of-mass energy of 1.96 TeV. The data, corresponding to an integrated luminosity of approximately 1fb-1, were collected by the D0 experiment at the Fermilab Tevatron Collider. Limits on the production cross section times branching ratio are set.

  3. Measurements of Charged Current Lepton Universality and |Vus| Using Tau Lepton Decays to e-nu¯enutau, mu-nu¯munutau, pi-nutau, and K-nutau

    Microsoft Academic Search

    B. Aubert; Y. Karyotakis; J. P. Lees; V. Poireau; E. Prencipe; X. Prudent; V. Tisserand; J. Garra Tico; E. Grauges; M. Martinelli; A. Palano; M. Pappagallo; G. Eigen; B. Stugu; L. Sun; M. Battaglia; D. N. Brown; L. T. Kerth; Yu. G. Kolomensky; G. Lynch; I. L. Osipenkov; K. Tackmann; T. Tanabe; C. M. Hawkes; N. Soni; A. T. Watson; H. Koch; T. Schroeder; D. J. Asgeirsson; B. G. Fulsom; C. Hearty; T. S. Mattison; J. A. McKenna; M. Barrett; A. Khan; A. Randle-Conde; V. E. Blinov; A. D. Bukin; A. R. Buzykaev; V. P. Druzhinin; V. B. Golubev; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; E. P. Solodov; K. Yu. Todyshev; M. Bondioli; S. Curry; I. Eschrich; D. Kirkby; A. J. Lankford; P. Lund; M. Mandelkern; E. C. Martin; D. P. Stoker; H. Atmacan; J. W. Gary; F. Liu; O. Long; G. M. Vitug; Z. Yasin; V. Sharma; C. Campagnari; T. M. Hong; D. Kovalskyi; M. A. Mazur; J. D. Richman; T. W. Beck; A. M. Eisner; C. A. Heusch; J. Kroseberg; W. S. Lockman; A. J. Martinez; T. Schalk; B. A. Schumm; A. Seiden; L. Wang; L. O. Winstrom; C. H. Cheng; D. A. Doll; B. Echenard; F. Fang; D. G. Hitlin; I. Narsky; P. Ongmongkolkul; T. Piatenko; F. C. Porter; R. Andreassen; G. Mancinelli; B. T. Meadows; K. Mishra; M. D. Sokoloff; P. C. Bloom; W. T. Ford; A. Gaz; J. F. Hirschauer; M. Nagel; U. Nauenberg; J. G. Smith; S. R. Wagner; R. Ayad; W. H. Toki; R. J. Wilson; E. Feltresi; A. Hauke; H. Jasper; T. M. Karbach; J. Merkel; A. Petzold; B. Spaan; K. Wacker; M. J. Kobel; R. Nogowski; K. R. Schubert; R. Schwierz; D. Bernard; E. Latour; M. Verderi; P. J. Clark; S. Playfer; J. E. Watson; M. Andreotti; D. Bettoni; C. Bozzi; R. Calabrese; A. Cecchi; G. Cibinetto; E. Fioravanti; P. Franchini; E. Luppi; M. Munerato; M. Negrini; A. Petrella; L. Piemontese; V. Santoro; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; G. Finocchiaro; S. Pacetti; P. Patteri; I. M. Peruzzi; M. Piccolo; M. Rama; A. Zallo; R. Contri; E. Guido; M. Lo Vetere; M. R. Monge; S. Passaggio; C. Patrignani; E. Robutti; S. Tosi; K. S. Chaisanguanthum; M. Morii; A. Adametz; J. Marks; S. Schenk; U. Uwer; F. U. Bernlochner; V. Klose; H. M. Lacker; T. Lueck; A. Volk; D. J. Bard; P. D. Dauncey; M. Tibbetts; P. K. Behera; M. J. Charles; U. Mallik; J. Cochran; H. B. Crawley; L. Dong; V. Eyges; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; Y. Y. Gao; A. V. Gritsan; Z. J. Guo; N. Arnaud; J. Béquilleux; A. D'Orazio; M. Davier; D. Derkach; J. Firmino da Costa; G. Grosdidier; F. Le Diberder; V. Lepeltier; A. M. Lutz; B. Malaescu; S. Pruvot; P. Roudeau; M. H. Schune; J. Serrano; V. Sordini; A. Stocchi; G. Wormser; D. J. Lange; D. M. Wright; I. Bingham; J. P. Burke; C. A. Chavez; J. R. Fry; E. Gabathuler; R. Gamet; D. E. Hutchcroft; D. J. Payne; C. Touramanis; A. J. Bevan; C. K. Clarke; F. di Lodovico; R. Sacco; M. Sigamani; G. Cowan; S. Paramesvaran; A. C. Wren; C. L. Davis; A. G. Denig; M. Fritsch; W. Gradl; A. Hafner; K. E. Alwyn; D. Bailey; R. J. Barlow; G. Jackson; G. D. Lafferty; T. J. West; J. I. Yi; J. Anderson; C. Chen; A. Jawahery; D. A. Roberts; G. Simi; J. M. Tuggle; C. Dallapiccola; E. Salvati; R. Cowan; D. Dujmic; P. H. Fisher; S. W. Henderson; G. Sciolla; M. Spitznagel; R. K. Yamamoto; M. Zhao; P. M. Patel; S. H. Robertson; M. Schram; P. Biassoni; A. Lazzaro; V. Lombardo; F. Palombo; S. Stracka; L. Cremaldi; R. Godang; R. Kroeger; P. Sonnek; D. J. Summers; H. W. Zhao; M. Simard; P. Taras; H. Nicholson; G. de Nardo; L. Lista; D. Monorchio; G. Onorato; C. Sciacca; G. Raven; H. L. Snoek; C. P. Jessop; K. J. Knoepfel; J. M. Losecco; W. F. Wang; L. A. Corwin; K. Honscheid; H. Kagan; R. Kass; J. P. Morris; A. M. Rahimi; S. J. Sekula; Q. K. Wong; N. L. Blount; J. Brau; R. Frey; O. Igonkina; J. A. Kolb; M. Lu; R. Rahmat; N. B. Sinev; D. Strom; J. Strube; E. Torrence; G. Castelli; N. Gagliardi; M. Margoni; M. Morandin; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; C. Voci; P. Del Amo Sanchez; E. Ben-Haim; G. R. Bonneaud; H. Briand; J. Chauveau; O. Hamon; Ph. Leruste; G. Marchiori; J. Ocariz; A. Perez; J. Prendki; S. Sitt; L. Gladney; M. Biasini; E. Manoni; C. Angelini; G. Batignani; S. Bettarini; G. Calderini; M. Carpinelli; A. Cervelli; F. Forti; M. A. Giorgi; A. Lusiani; M. Morganti; N. Neri; E. Paoloni; G. Rizzo; J. J. Walsh; D. Lopes Pegna; C. Lu; J. Olsen; A. J. S. Smith; A. V. Telnov; F. Anulli; E. Baracchini; G. Cavoto; R. Faccini; F. Ferrarotto; F. Ferroni; M. Gaspero; P. D. Jackson; L. Li Gioi; M. A. Mazzoni; S. Morganti; G. Piredda; F. Renga; C. Voena; M. Ebert; T. Hartmann; H. Schröder; R. Waldi; T. Adye; B. Franek; E. O. Olaiya; F. F. Wilson; S. Emery; L. Esteve; G. Hamel de Monchenault; W. Kozanecki; G. Vasseur; Ch. Yèche; M. Zito; M. T. Allen; D. Aston; R. Bartoldus; J. F. Benitez; R. Cenci; J. P. Coleman; M. R. Convery; J. C. Dingfelder; J. Dorfan; G. P. Dubois-Felsmann; W. Dunwoodie; R. C. Field

    2010-01-01

    Using 467fb-1 of e+e- annihilation data collected with the BABAR detector, we measure (B(tau--->mu-nu¯munutau))\\/(B(tau--->e-nu¯enutau))=(0.9796±0.0016±0.0036), (B(tau--->pi-nutau))\\/(B(tau--->e-nu¯enutau))=(0.5945±0.0014±0.0061), and (B(tau--->K-nutau))\\/(B(tau--->e-nu¯enutau))=(0.03882±0.00032±0.00057), where the uncertainties are statistical and systematic, respectively. From these precision tau measurements, we test the standard model assumption of mu-e and tau-mu charge current lepton universality and provide determinations of |Vus| experimentally independent of the decay of a kaon.

  4. DONUT observation of nu_tau interactions

    E-print Network

    Sielaff, J

    2001-01-01

    The DONUT collaboration has observed four events in a hybrid emulsion spectrometer consistent with tau neutrino charged-current interactions. The resulting tau lepton is identified by its decay into a single charged particle. The expected background of charm decays and secondary interactions is .34 +/- >.05 events. The probability that all tau neutrino candidates are due to background proceesses is 1.1 x 10-4.

  5. Measurement of the tau lepton lifetime

    Microsoft Academic Search

    D. Decamp; B. Deschizeaux; C. Goy; J.-P. Lees; M.-N. Minard; R. Alemany; F. Ariztizabal; J. M. Crespo; M. Delfino; E. Fernandez; V. Gaitan; Ll. Garrido; Ll. M. Mir; A. Pacheco; A. Pascual; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; M. Maggi; S. Natali; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Gao; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; W. B. Atwood; L. A. T. Bauerdick; E. Blucher; G. Bonvicini; F. Bossi; J. Boudreau; T. H. Burnett; H. Drevermann; R. W. Forty; R. Hagelberg; S. Haywood; J. Hilgart; R. Jacobsen; B. Jost; M. Kasemann; J. Knobloch; E. Lançon; I. Lehraus; T. Lohse; A. Lusiani; M. Martinez; P. Mato; T. Mattison; H. Meinhard; S R Menary; T. Meyer; Adolf G Minten; A. Miotto; R. Miquel; H.-G. Moser; J. Nash; P. Palazzi; J. A. Perlas; F. Ranjard; G. Redlinger; Luigi Rolandi; A E Roth; J E Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; W. Tejessy; H. Wachsmuth; W. Wiedenmann; J. Wotschack; Z. Ajaltouni; F. Badaud; M. Bardadin-Otwinowska; A. M. Bencheikh; R. El Fellous; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; B. Pietrzyk; J. Proriol; F. Prulhière; G. Stimpfl; J. D. Hansen; J. R. Hansen; P. H. Hansen; R. Møllerud; B. S. Nilsson; I. Efthymiopoulos; E. Simopoulou; A. Vayaki; J. Badier; A. Blondel; G. Bonneaud; J. C. Brient; G. Fouque; A. Gamess; J. Harvey; S. Orteu; A. Rosowsky; M. Rumpf; R. Tanaka; H. Videau; D. J. Candlin; M. I. Parsons; E. Veitch; L. Moneta; G. Parrini; M. Corden; C. Georgiopoulos; M. Ikeda; J. Lannutti; D. Levinthal; M. Mermikides; L. Sawyer; S. Wasserbaech; A. Antonelli; R. Baldini; G. Bencivenni; P. Campana; G. Capon; F. Cerutti; V. Chiarella; B. D'Ettorre-Piazzoli; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; L. Passalacqua; M. Pepe-Altarelli; P. Picchi; B. Altoon; O. Boyle; P. Colrain; A. W. Halley; I. Ten Have; J. G. Lynch; W. Maitland; C. Raine; J. M. Scarr; K. Smith; A. S. Thompson; R. M. Turnbull; B. Brandl; O. Braun; R. Geiges; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; Y. Maumary; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; A. T. Belk; R. Beuselinck; D. M. Binnie; W. Cameron; M. Cattaneo; D. J. Colling; P. J. Dornan; S. Dugeay; A. M. Greene; J. F. Hassard; N. M. Lieske; S. J. Patton; D. G. Payne; M. J. Phillips; J. K. Sedgbeer; G. Taylor; I. R. Tomalin; A. G. Wright; P. Girtler; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Keemer; M. Nuttall; A. Patel; T. Sloan; S. W. Snow; E. P. Whelan; T. Barczewski; K. Kleinknecht; J. Raab; B. Renk; S. Roehn; H.-G. Sander; H. Schmidt; F. Steeg; S. M. Walther; B. Wolf; J.-J. Aubert; C. Benchouk; V. Bernard; A. Bonissent; J. Carr; P. Coyle; J. Drinkard; F. Etienne; S. Papalexiou; P. Payre; Z. Qian; D. Rousseau; P. Schwemling; M. Talby; S. Adlung; H. Becker; W. Blum; D. Brown; P. Cattaneo; G. Cowan; B. Dehning; H. Dietl; F. Dydak; M. Fernandez-Bosman; T. Hansl-Kozanecka; J. Lauber; G. Lütjens; W. Männer; Y. Pan; R H Richter; Herbert Rotscheidt; J. Schröder; A. S. Schwarz; Ronald Settles; U. Stierlin; U. Stiegler; R. St. Denis; M. Takashima; J. Thomas; G. Wolf; V. Bertin; J. Boucrot; O. Callot; X. Chen; A. Cordier; M. Davier; J.-F. Grivaz; Ph. Heusse; P. Janot; D. W. Kim; F R Le Diberder; J. Lefrançois; A.-M. Lutz; M.-H. Schune; J.-J. Veillet; I. Videau; Z. Zhang; F. Zomer; D. Abbaneo; S. R. Amendolia; G. Bagliesi; G. Batignani; L. Bosisio; U. Bottigli; C. Bradaschia; M. Carpinelli; M. A. Ciocci; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; E. Focardi; F. Forti; C. Gatto; A. Giassi; M. A. Giorgi; F. Ligabue; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; Fabrizio Palla; G. Sanguinetti; Jack Steinberger; Roberto Tenchini; G. Tonelli; G. Triggiani; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; J. M. Carter; M. G. Green; P. V. March; T. Medacalf; I. S. Quazi; J. A. Strong; L. R. West; T. Wildish; David R Botterill; R. W. Clifft; T. R. Edgecock; M. Edwards; S. M. Fisher; T. J. Jones; P. R. Norton; D. P. Salmon; J. C. Thompson; B. Bloch-Devaux; P. Colas; Witold Kozanecki; M. C. Lemaire; E. Locci; Sotirios S Loucatos; E. Monnier; P. Perez; F. Perrier; J. Rander; J.-F. Renardy; A. Roussarie; J.-P. Schuller; J. Schwindling; D. Si Mohand; B. Vallage; R. P. Johnson; A. M. Litke; J. Wear; John Gavin Ashman; W. Babbage; C. N. Booth; C M Buttar; R. E. Carney; S L Cartwright; F. Combley; F. Hatfield; J. Martin; D. Parker; P. Reeves; L. F. Thompson; E. Barberio; S. Brandt; Claus Grupen; L. Mirabito; U. Schäfer; H. Seywerd; G. Ganis; G. Giannini; B. Gobbo; F. Ragusa; L. Bellantoni; D. Cinabro; J. S. Conway; D. F. Cowen; Z. Feng; D. P. S. Ferguson; J. Grahl; J. L. Harton; R. C. Jared

    1992-01-01

    The mean lifetime of the tau lepton is measured from a sample of Z-->tau+tau- decays observed with the ALEPH detector at LEP in 1989 and 1990. A new technique is applied to the events containing two one-prong decays: the lifetime is measured from the observed correlation between the impact parameters and azimuthal angles of the two charged tracks. The lifetime

  6. Search for supersymmetric Higgs bosons in the di-tau decay mode in pp¯ collisions at &surd;(s)=1.8 TeV

    Microsoft Academic Search

    D. Acosta; T. Affolder; M. G. Albrow; D. Ambrose; D. Amidei; K. Anikeev; J. Antos; G. Apollinari; T. Arisawa; A. Artikov; W. Ashmanskas; F. Azfar; P. Azzi-Bacchetta; N. Bacchetta; H. Bachacou; W. Badgett; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; S. Baroiant; M. Barone; G. Bauer; F. Bedeschi; S. Behari; S. Belforte; W. H. Bell; G. Bellettini; J. Bellinger; D. Benjamin; A. Beretvas; A. Bhatti; M. Binkley; D. Bisello; M. Bishai; R. E. Blair; C. Blocker; K. Bloom; B. Blumenfeld; A. Bocci; A. Bodek; G. Bolla; A. Bolshov; D. Bortoletto; J. Boudreau; C. Bromberg; E. Brubaker; J. Budagov; H. S. Budd; K. Burkett; G. Busetto; K. L. Byrum; S. Cabrera; M. Campbell; W. Carithers; D. Carlsmith; A. Castro; D. Cauz; A. Cerri; L. Cerrito; J. Chapman; C. Chen; Y. C. Chen; M. Chertok; G. Chiarelli; G. Chlachidze; F. Chlebana; M. L. Chu; J. Y. Chung; W.-H. Chung; Y. S. Chung; C. I. Ciobanu; A. G. Clark; M. Coca; A. Connolly; M. Convery; J. Conway; M. Cordelli; J. Cranshaw; R. Culbertson; D. Dagenhart; S. D'Auria; P. de Barbaro; S. de Cecco; S. Dell'Agnello; M. Dell'Orso; S. Demers; L. Demortier; M. Deninno; D. de Pedis; P. F. Derwent; C. Dionisi; J. R. Dittmann; A. Dominguez; S. Donati; M. D'Onofrio; T. Dorigo; N. Eddy; R. Erbacher; D. Errede; S. Errede; R. Eusebi; S. Farrington; R. G. Feild; J. P. Fernandez; C. Ferretti; R. D. Field; I. Fiori; B. Flaugher; L. R. Flores-Castillo; G. W. Foster; M. Franklin; J. Friedman; I. Furic; M. Gallinaro; M. Garcia-Sciveres; A. F. Garfinkel; C. Gay; D. W. Gerdes; E. Gerstein; S. Giagu; P. Giannetti; K. Giolo; M. Giordani; P. Giromini; V. Glagolev; D. Glenzinski; M. Gold; N. Goldschmidt; J. Goldstein; G. Gomez; M. Goncharov; I. Gorelov; A. T. Goshaw; Y. Gotra; K. Goulianos; A. Gresele; C. Grosso-Pilcher; M. Guenther; J. Guimaraes da Costa; C. Haber; S. R. Hahn; E. Halkiadakis; R. Handler; F. Happacher; K. Hara; R. M. Harris; F. Hartmann; K. Hatakeyama; J. Hauser; J. Heinrich; M. Hennecke; M. Herndon; C. Hill; A. Hocker; K. D. Hoffman; S. Hou; B. T. Huffman; R. Hughes; J. Huston; J. Incandela; G. Introzzi; M. Iori; C. Issever; A. Ivanov; Y. Iwata; B. Iyutin; E. James; M. Jones; T. Kamon; J. Kang; M. Karagoz Unel; S. Kartal; H. Kasha; Y. Kato; R. D. Kennedy; R. Kephart; B. Kilminster; D. H. Kim; H. S. Kim; M. J. Kim; S. B. Kim; S. H. Kim; T. H. Kim; Y. K. Kim; M. Kirby; L. Kirsch; S. Klimenko; P. Koehn; K. Kondo; J. Konigsberg; A. Korn; A. Korytov; J. Kroll; M. Kruse; V. Krutelyov; S. E. Kuhlmann; N. Kuznetsova; A. T. Laasanen; S. Lami; S. Lammel; J. Lancaster; M. Lancaster; R. Lander; K. Lannon; A. Lath; G. Latino; T. Lecompte; Y. Le; J. Lee; S. W. Lee; N. Leonardo; S. Leone; J. D. Lewis; K. Li; C. S. Lin; M. Lindgren; T. M. Liss; D. O. Litvintsev; T. Liu; N. S. Lockyer; A. Loginov; M. Loreti; D. Lucchesi; P. Lukens; L. Lyons; J. Lys; R. Madrak; K. Maeshima; P. Maksimovic; L. Malferrari; M. Mangano; G. Manca; M. Mariotti; M. Martin; A. Martin; V. Martin; M. Martínez; P. Mazzanti; K. S. McFarland; P. McIntyre; M. Menguzzato; A. Menzione; P. Merkel; C. Mesropian; A. Meyer; T. Miao; J. S. Miller; R. Miller; S. Miscetti; G. Mitselmakher; N. Moggi; R. Moore; T. Moulik; A. Mukherjee; M. Mulhearn; T. Muller; A. Munar; P. Murat; J. Nachtman; S. Nahn; I. Nakano; R. Napora; C. Nelson; T. Nelson; C. Neu; M. S. Neubauer; C. Newman-Holmes; F. Niell; T. Nigmanov; L. Nodulman; S. H. Oh; Y. D. Oh; T. Ohsugi; T. Okusawa; W. Orejudos; C. Pagliarone; F. Palmonari; R. Paoletti; V. Papadimitriou; J. Patrick; G. Pauletta; M. Paulini; T. Pauly; C. Paus; D. Pellett; A. Penzo; T. J. Phillips; G. Piacentino; J. Piedra; K. T. Pitts; A. Pompos; L. Pondrom; G. Pope; O. Poukov; T. Pratt; F. Prokoshin; J. Proudfoot; F. Ptohos; G. Punzi; J. Rademacker; A. Rakitine; F. Ratnikov; H. Ray; A. Reichold; P. Renton; M. Rescigno; F. Rimondi; L. Ristori; W. J. Robertson; T. Rodrigo; S. Rolli; L. Rosenson; R. Roser; R. Rossin; C. Rott; A. Roy; A. Ruiz; D. Ryan; A. Safonov; R. St. Denis; W. K. Sakumoto; D. Saltzberg; C. Sanchez; A. Sansoni; L. Santi; S. Sarkar; P. Savard; A. Savoy-Navarro; P. Schlabach; E. E. Schmidt; M. P. Schmidt; M. Schmitt; L. Scodellaro; A. Scribano; A. Sedov; S. Seidel; Y. Seiya; A. Semenov; F. Semeria; M. D. Shapiro; P. F. Shepard; T. Shibayama; M. Shimojima; M. Shochet; A. Sidoti; A. Sill; P. Sinervo; A. J. Slaughter; K. Sliwa; F. D. Snider; R. Snihur; M. Spezziga; L. Spiegel; F. Spinella; M. Spiropulu; A. Stefanini; J. Strologas; D. Stuart; A. Sukhanov; K. Sumorok; T. Suzuki; R. Takashima; K. Takikawa; M. Tanaka; M. Tecchio; P. K. Teng; K. Terashi; R. J. Tesarek; S. Tether; J. Thom; A. S. Thompson; E. Thomson; P. Tipton; S. Tkaczyk; D. Toback; K. Tollefson; D. Tonelli; M. Tönnesmann; H. Toyoda; W. Trischuk; J. Tseng; D. Tsybychev; N. Turini; F. Ukegawa; T. Unverhau; T. Vaiciulis; A. Varganov; E. Vataga; S. Vejcik III; G. Velev; G. Veramendi; R. Vidal; I. Vila; R. Vilar; I. Volobouev

    2005-01-01

    A search for the direct production of Higgs bosons in the di-tau decay mode is performed with 86.3±3.5pb-1 of data collected with the Collider Detector at Fermilab during the 1994-1995 data taking period of the Tevatron. We search for events where one tau decays to an electron plus neutrinos and the other tau decays hadronically. We perform a counting experiment

  7. Measurement of the branching fraction for gamma (1S) --> tau+tau-

    Microsoft Academic Search

    D. Cinabro; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; G. Gollin; B. Ong; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; M. Ogg; A. Bellerive; D. I. Britton; E. R. F. Hyatt; D. B. Macfarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; S. Kotov; I. Kravchenko; N. Kwak; H. Lam; Y. Kubota; M. Lattery; M. Momayezi; J. K. Nelson; S. Patton; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; Z. Ling; A. H. Mahmood; J. J. O'Neill; H. Severini; C. R. Sun; F. Wappler; G. Crawford; C. M. Daubenmier; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; R. Malchow; M. Sung; C. White; M. M. Zoeller; F. Butler; X. Fu; B. Nemati; W. R. Ross; P. Skubic; M. Wood; M. Bishai; J. Fast; E. Gerndt; J. W. Hinson; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; D. Payne; E. I. Shibata; I. P. J. Shipsey; P. N. Wang; M. Battle; J. Ernst; L. Gibbons; Y. Kwon; S. Roberts; E. H. Thorndike; C. H. Wang; J. Dominick; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; P. Zadorozhny; M. Artuso; M. Gao; M. Goldberg; D. He; N. Horwitz; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; S. Stone; X. Xing; G. Zhu; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; D. Gibaut; K. Kinoshita; P. Pomianowski; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'Grady; J. Urheim; A. J. Weinstein; M. Athanas; W. Brower; G. Masek; H. P. Paar; M. Sivertz; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; A. Ryd; D. Sperka; H. Tajima; M. S. Witherell; R. Balest; K. Cho; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; P. S. Drell; D. J. Dumas; R. Ehrlich; P. Gaidarev; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; S. Henderson; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; S. Salman; M. Sapper; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; S. Yang; J. Yelton

    1994-01-01

    We have studied the leptonic decay of the gamma (1S) resonance into tau pairs using the CLEO II detector. A clean sample of tau pair events is identified via events containing two charged particles where exactly one of the particles is an identified electron. We find B(gamma(1S) --> tau+tau-) = (2.61+\\/-0.12-0.13+0.09)%. The result is consistent with expectations from lepton universality

  8. Search for Charged Higgs Boson Decays of the Top Quark using Hadronic Decays of the Tau Lepton

    Microsoft Academic Search

    F. Abe; H. Akimoto; A. Akopian; M. G. Albrow; S. R. Amendolia; D. Amidei; J. Antos; S. Aota; G. Apollinari; T. Asakawa; W. Ashmanskas; M. Atac; F. Azfar; P. Azzi-Bacchetta; N. Bacchetta; W. Badgett; S. Bagdasarov; M. W. Bailey; J. Berryhill; P. de Barbaro; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; M. Barone; E. Barzi; G. Bauer; T. Baumann; F. Bedeschi; S. Behrends; S. Belforte; G. Bellettini; J. Bellinger; D. Benjamin; J. Benlloch; J. Bensinger; D. Benton; A. Beretvas; J. P. Berge; S. Bertolucci; B. Bevensee; A. Bhatti; K. Biery; M. Binkley; D. Bisello; R. E. Blair; C. Blocker; A. Bodek; W. Bokhari; V. Bolognesi; G. Bolla; D. Bortoletto; J. Boudreau; L. Breccia; C. Bromberg; N. Bruner; E. Buckley-Geer; H. S. Budd; K. Burkett; G. Busetto; A. Byon-Wagner; K. L. Byrum; J. Cammerata; C. Campagnari; M. Campbell; A. Caner; W. Carithers; D. Carlsmith; A. Castro; D. Cauz; Y. Cen; F. Cervelli; P. S. Chang; H. Y. Chao; J. Chapman; M.-T. Cheng; G. Chiarelli; T. Chikamatsu; C. N. Chiou; L. Christofek; S. Cihangir; A. G. Clark; M. Cobal; E. Cocca; M. Contreras; J. Conway; J. Cooper; M. Cordelli; C. Couyoumtzelis; D. Cronin-Hennessy; R. Culbertson; T. Daniels; F. Dejongh; S. Delchamps; S. dell'Agnello; M. dell'Orso; R. Demina; L. Demortier; M. Deninno; P. F. Derwent; T. Devlin; J. R. Dittmann; S. Donati; J. Done; T. Dorigo; A. Dunn; N. Eddy; K. Einsweiler; J. E. Elias; R. Ely; E. Engels Jr.; D. Errede; S. Errede; Q. Fan; G. Feild; C. Ferretti; I. Fiori; B. Flaugher; G. W. Foster; M. Franklin; M. Frautschi; J. Freeman; J. Friedman; H. Frisch; Y. Fukui; S. Funaki; S. Galeotti; M. Gallinaro; O. Ganel; M. Garcia-Sciveres; A. F. Garfinkel; C. Gay; S. Geer; D. W. Gerdes; P. Giannetti; N. Giokaris; P. Giromini; G. Giusti; L. Gladney; D. Glenzinski; M. Gold; J. Gonzalez; A. Gordon; A. T. Goshaw; Y. Gotra; K. Goulianos; H. Grassmann; L. Groer; C. Grosso-Pilcher; G. Guillian; R. S. Guo; C. Haber; E. Hafen; S. R. Hahn; R. Handler; R. M. Hans; F. Happacher; K. Hara; A. D. Hardman; B. Harral; R. M. Harris; S. A. Hauger; J. Hauser; C. Hawk; E. Hayashi; J. Heinrich; B. Hinrichsen; K. D. Hoffman; M. Hohlmann; C. Holck; R. Hollebeek; L. Holloway; S. Hong; G. Houk; P. Hu; B. T. Huffman; R. Hughes; J. Huston; J. Huth; J. Hylen; H. Ikeda; M. Incagli; J. Incandela; G. Introzzi; J. Iwai; Y. Iwata; H. Jensen; U. Joshi; R. W. Kadel; E. Kajfasz; H. Kambara; T. A. Keaffaber; T. Kaneko; K. Karr; H. Kasha; Y. Kato; K. Kelley; R. D. Kennedy; R. Kephart; P. Kesten; D. Kestenbaum; H. Keutelian; F. Keyvan; B. Kharadia; B. J. Kim; D. H. Kim; H. S. Kim; S. B. Kim; S. H. Kim; Y. K. Kim; L. Kirsch; P. Koehn; K. Kondo; J. Konigsberg; S. Kopp; K. Kordas; A. Korytov; W. Koska; E. Kovacs; W. Kowald; M. Krasberg; J. Kroll; M. Kruse; T. Kuwabara; S. E. Kuhlmann; E. Kuns; A. T. Laasanen; S. Lami; S. Lammel; J. I. Lamoureux; M. Lancaster; T. Lecompte; S. Leone; J. D. Lewis; P. Limon; M. Lindgren; T. M. Liss; J. B. Liu; Y. C. Liu; N. Lockyer; O. Long; C. Loomis; M. Loreti; J. Lu; D. Lucchesi; P. Lukens; S. Lusin; J. Lys; K. Maeshima; A. Maghakian; P. Maksimovic; M. Mangano; J. Mansour; M. Mariotti; J. P. Marriner; A. Martin; J. A. Matthews; R. Mattingly; P. McIntyre; P. Melese; A. Menzione; E. Meschi; S. Metzler; C. Miao; T. Miao; G. Michail; R. Miller; H. Minato; S. Miscetti; M. Mishina; H. Mitsushio; T. Miyamoto; S. Miyashita; N. Moggi; Y. Morita; A. Mukherjee; T. Muller; P. Murat; H. Nakada; I. Nakano; C. Nelson; D. Neuberger; C. Newman-Holmes; C.-Y. P. Ngan; M. Ninomiya; L. Nodulman; S. H. Oh; K. E. Ohl; T. Ohmoto; T. Ohsugi; R. Oishi; M. Okabe; T. Okusawa; R. Oliveira; J. Olsen; C. Pagliarone; R. Paoletti; V. Papadimitriou; S. P. Pappas; N. Parashar; A. Parri; J. Patrick; G. Pauletta; M. Paulini; A. Perazzo; L. Pescara; M. D. Peters; T. J. Phillips; G. Piacentino; M. Pillai; K. T. Pitts; R. Plunkett; L. Pondrom; J. Proudfoot; F. Ptohos; G. Punzi; K. Ragan; D. Reher; A. Ribon; F. Rimondi; L. Ristori; W. J. Robertson; T. Rodrigo; S. Rolli; J. Romano; L. Rosenson; R. Roser; T. Saab; W. K. Sakumoto; D. Saltzberg; A. Sansoni; L. Santi; H. Sato; P. Schlabach; E. E. Schmidt; M. P. Schmidt; A. Scribano; S. Segler; S. Seidel; Y. Seiya; G. Sganos; M. D. Shapiro; N. M. Shaw; Q. Shen; P. F. Shepard; M. Shimojima; M. Shochet; J. Siegrist; A. Sill; P. Sinervo; P. Singh; J. Skarha; K. Sliwa; F. D. Snider; T. Song; J. Spalding; T. Speer; P. Sphicas; F. Spinella; M. Spiropulu; L. Spiegel; L. Stanco; J. Steele; A. Stefanini; K. Strahl; J. Strait; R. Ströhmer; D. Stuart; G. Sullivan; K. Sumorok; J. Suzuki; T. Takada; T. Takahashi; T. Takano; K. Takikawa; N. Tamura; B. Tannenbaum; F. Tartarelli; W. Taylor; P. K. Teng; Y. Teramoto; S. Tether; D. Theriot; T. L. Thomas; R. Thun; R. Thurman-Keup; M. Timko; P. Tipton; A. Titov; S. Tkaczyk; D. Toback; K. Tollefson; A. Tollestrup; H. Toyoda; W. Trischuk; J. F. de Troconiz; S. Truitt; J. Tseng; N. Turini; T. Uchida

    1997-01-01

    This Letter describes a direct search for charged Higgs boson production in pp¯ collisions at s = 1.8 TeV recorded by the Collider Detector at Fermilab. Two-Higgs-double extensions to the standard model predict the existence of charged Higgs bosons \\\\(H+\\/-\\\\). In such models, the branching fraction for top quarks B\\\\(t-->H+b-->tau+nub\\\\) can be large. This search uses the hadronic decays of

  9. Status of the Hadronic tau Decay Determination of |V_{us}|

    E-print Network

    K. Maltman; C. E. Wolfe; S. Banerjee; I. M. Nugent; J. M. Roney

    2009-06-07

    We update the hadronic tau determination of |V_{us}|, showing that current strange branching fractions produce results 2-3 sigma lower than 3-family unitarity expectations. Issues related to the size of theoretical uncertainties and results from an alternate, mixed tau-electroproduction sum rule determination (which, by construction, produces a much smaller theoretical uncertainty), are also considered.

  10. Tau Ranging Revisited

    NASA Technical Reports Server (NTRS)

    Tausworthe, Robert C.

    1989-01-01

    Report reviews history of tau ranging and advocates use of advanced electronic circuitry to revive this composite-code-uplink spacecraft-ranging technique. Very-large-scale integration gives new life to abandoned distance-measuring technique.

  11. U.Akgun, ECLIPSE06, Antalya, MSSM Higgs TauTau TauTau LeptonicLeptonic

    E-print Network

    Akgun, Ugur

    U.Akgun, ECLIPSE06, Antalya, Turkey MSSM Higgs TauTau TauTau LeptonicLeptonic Missing Et and Mass Reconstruction U. Akgun, F. Duru, S. Kunori The University of Iowa Fermilab #12;U.Akgun, ECLIPSE06, Antalya reconstruction improvements. #12;U.Akgun, ECLIPSE06, Antalya, Turkey bbA/H 2tau ll · We use DC04 sample. · Signal

  12. Search for Lepton Flavour Violating Decays Tau- to L- K0(S) and Tau- to L- (Rho0, K*0, Anti-K*0, Phi) at BaBar

    SciTech Connect

    Cenci, R.; /SLAC; Roney, J.M.; /Victoria U.

    2011-11-30

    We report on recent searches for lepton flavour violating decays of the {tau} lepton: {tau}{sup -} {yields} {ell}{sup -} K{sub S}{sup 0}, {tau}{sup -} {yields} {ell}{sup -}({rho}{sup 0}, K*{sup 0}, {bar K}*{sup 0}, {phi}). These preliminary results use data samples collected by the BaBar detector at the SLAC PEP-II B factory corresponding to integrated luminosities of 469 fb{sup -1} for the {tau}{sup -} {yields} {ell}{sup -}K{sub S}{sup 0} and 451 fb{sup -1} for the {tau}{sup -} {yields} {ell}{sup -}({rho}{sup 0}, K*{sup 0}, {bar K}*{sup 0}, {phi}) searches. No statistically significant signal has been observed in any of these channels and we set upper limits on their branching fractions between 0.8-18.2 x 10{sup -8} at 90% confidence level.

  13. Search for the associated production of a b quark and a neutral supersymmetric Higgs boson that decays into tau pairs.

    PubMed

    Abazov, V M; Abbott, B; Abolins, M; Acharya, B S; Adams, M; Adams, T; Aguilo, E; Ahsan, M; Alexeev, G D; Alkhazov, G; Alton, A; Alverson, G; Alves, G A; Ancu, L S; Aoki, M; Arnoud, Y; Arov, M; Askew, A; Asman, B; Atramentov, O; Avila, C; BackusMayes, J; Badaud, F; Bagby, L; Baldin, B; Bandurin, D V; Banerjee, S; Barberis, E; Barfuss, A-F; Baringer, P; Barreto, J; Bartlett, J F; Bassler, U; Bauer, D; Beale, S; Bean, A; Begalli, M; Begel, M; Belanger-Champagne, C; Bellantoni, L; Benitez, J A; Beri, S B; Bernardi, G; Bernhard, R; Bertram, I; Besançon, M; Beuselinck, R; Bezzubov, V A; Bhat, P C; Bhatnagar, V; Blazey, G; Blessing, S; Bloom, K; Boehnlein, A; Boline, D; Bolton, T A; Boos, E E; Borissov, G; Bose, T; Brandt, A; Brock, R; Brooijmans, G; Bross, A; Brown, D; Bu, X B; Buchholz, D; Buehler, M; Buescher, V; Bunichev, V; Burdin, S; Burnett, T H; Buszello, C P; Calfayan, P; Calpas, B; Calvet, S; Camacho-Pérez, E; Cammin, J; Carrasco-Lizarraga, M A; Carrera, E; Carvalho, W; Casey, B C K; Castilla-Valdez, H; Chakrabarti, S; Chakraborty, D; Chan, K M; Chandra, A; Cheu, E; Chevalier-Théry, S; Cho, D K; Cho, S W; Choi, S; Choudhary, B; Christoudias, T; Cihangir, S; Claes, D; Clutter, J; Cooke, M; Cooper, W E; Corcoran, M; Couderc, F; Cousinou, M-C; Cutts, D; Cwiok, M; Das, A; Davies, G; De, K; de Jong, S J; De la Cruz-Burelo, E; DeVaughan, K; Déliot, F; Demarteau, M; Demina, R; Denisov, D; Denisov, S P; Desai, S; Diehl, H T; Diesburg, M; Dominguez, A; Dorland, T; Dubey, A; Dudko, L V; Duflot, L; Duggan, D; Duperrin, A; Dutt, S; Dyshkant, A; Eads, M; Edmunds, D; Ellison, J; Elvira, V D; Enari, Y; Eno, S; Evans, H; Evdokimov, A; Evdokimov, V N; Facini, G; Ferapontov, A V; Ferbel, T; Fiedler, F; Filthaut, F; Fisher, W; Fisk, H E; Fortner, M; Fox, H; Fuess, S; Gadfort, T; Galea, C F; Garcia-Bellido, A; Gavrilov, V; Gay, P; Geist, W; Geng, W; Gerbaudo, D; Gerber, C E; Gershtein, Y; Gillberg, D; Ginther, G; Golovanov, G; Gómez, B; Goussiou, A; Grannis, P D; Greder, S; Greenlee, H; Greenwood, Z D; Gregores, E M; Grenier, G; Gris, Ph; Grivaz, J-F; Grohsjean, A; Grünendahl, S; Grünewald, M W; Guo, F; Guo, J; Gutierrez, G; Gutierrez, P; Haas, A; Haefner, P; Hagopian, S; Haley, J; Hall, I; Hall, R E; Han, L; Harder, K; Harel, A; Hauptman, J M; Hays, J; Hebbeker, T; Hedin, D; Hegeman, J G; Heinson, A P; Heintz, U; Hensel, C; Heredia-De la Cruz, I; Herner, K; Hesketh, G; Hildreth, M D; Hirosky, R; Hoang, T; Hobbs, J D; Hoeneisen, B; Hohlfeld, M; Hossain, S; Houben, P; Hu, Y; Hubacek, Z; Huske, N; Hynek, V; Iashvili, I; Illingworth, R; Ito, A S; Jabeen, S; Jaffré, M; Jain, S; Jakobs, K; Jamin, D; Jesik, R; Johns, K; Johnson, C; Johnson, M; Johnston, D; Jonckheere, A; Jonsson, P; Juste, A; Kajfasz, E; Karmanov, D; Kasper, P A; Katsanos, I; Kaushik, V; Kehoe, R; Kermiche, S; Khalatyan, N; Khanov, A; Kharchilava, A; Kharzheev, Y N; Khatidze, D; Kirby, M H; Kirsch, M; Kohli, J M; Kozelov, A V; Kraus, J; Kumar, A; Kupco, A; Kurca, T; Kuzmin, V A; Kvita, J; Lacroix, F; Lam, D; Lammers, S; Landsberg, G; Lebrun, P; Lee, H S; Lee, W M; Leflat, A; Lellouch, J; Li, L; Li, Q Z; Lietti, S M; Lim, J K; Lincoln, D; Linnemann, J; Lipaev, V V; Lipton, R; Liu, Y; Liu, Z; Lobodenko, A; Lokajicek, M; Love, P; Lubatti, H J; Luna-Garcia, R; Lyon, A L; Maciel, A K A; Mackin, D; Mättig, P; Magaña-Villalba, R; Mal, P K; Malik, S; Malyshev, V L; Maravin, Y; Martin, B; Martínez-Ortega, J; McCarthy, R; McGivern, C L; Meijer, M M; Melnitchouk, A; Mendoza, L; Menezes, D; Mercadante, P G; Merkin, M; Meyer, A; Meyer, J; Mondal, N K; Moore, R W; Moulik, T; Muanza, G S; Mulhearn, M; Mundal, O; Mundim, L; Nagy, E; Naimuddin, M; Narain, M; Nayyar, R; Neal, H A; Negret, J P; Neustroev, P; Nilsen, H; Nogima, H; Novaes, S F; Nunnemann, T; Obrant, G; Onoprienko, D; Orduna, J; Osman, N; Osta, J; Otec, R; Otero y Garzón, G J; Owen, M; Padilla, M; Padley, P; Pangilinan, M; Parashar, N; Parihar, V; Park, S-J; Park, S K; Parsons, J; Partridge, R; Parua, N; Patwa, A; Penning, B; Perfilov, M; Peters, K; Peters, Y; Pétroff, P; Piegaia, R; Piper, J; Pleier, M-A; Podesta-Lerma, P L M; Podstavkov, V M; Pogorelov, Y; Pol, M-E; Polozov, P; Popov, A V; Prewitt, M; Protopopescu, S; Qian, J; Quadt, A; Quinn, B; Rangel, M S; Ranjan, K; Ratoff, P N; Razumov, I; Renkel, P; Rich, P; Rijssenbeek, M; Ripp-Baudot, I; Rizatdinova, F; Robinson, S; Rominsky, M; Royon, C; Rubinov, P; Ruchti, R; Safronov, G; Sajot, G; Sánchez-Hernández, A; Sanders, M P; Sanghi, B; Savage, G; Sawyer, L; Scanlon, T; Schaile, D; Schamberger, R D; Scheglov, Y; Schellman, H; Schliephake, T; Schlobohm, S; Schwanenberger, C; Schwienhorst, R; Sekaric, J; Severini, H; Shabalina, E; Shamim, M; Shary, V; Shchukin, A A; Shivpuri, R K; Simak, V; Sirotenko, V; Skubic, P; Slattery, P; Smirnov, D; Snow, G R; Snow, J; Snyder, S; Söldner-Rembold, S; Sonnenschein, L; Sopczak, A; Sosebee, M

    2010-04-16

    We report results from a search for production of a neutral Higgs boson in association with a b quark. We search for Higgs decays to tau pairs with one tau subsequently decaying to a muon and the other to hadrons. The data correspond to 2.7 fb(-1) of pp collisions recorded by the D0 detector at square root(s)=1.96 TeV. The data are found to be consistent with background predictions. The result allows us to exclude a significant region of parameter space of the minimal supersymmetric model. PMID:20481981

  14. The Search for B+ to Tau+ Nu(Tau) at BaBar

    SciTech Connect

    Corwin, L.A.; /SLAC

    2007-01-08

    We present a search for the decay B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} using 288 fb{sup -1} of data collected at the {Upsilon}(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed semileptonic B decay (B{sup -} {yields} D{sup o}{ell}{sup -}{bar {nu}}{sub {ell}}X) is selected, and in the recoil a search for B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} signal is performed. The {tau} is identified in the following channels: {tau}{sup +} {yields} e{sup +}{nu}{sub e}{bar {nu}}{sub {tau}}, {tau}{sup +} {yields} {mu}{sup +} {nu}{sub {mu}}{bar {nu}}{sub {tau}}, {tau}{sup +} {yields} {pi}{sup +}{pi}{sup 0}{bar {nu}}{sub {tau}}. We measure a branching fraction of {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) = 0.88{sub -0.67}{sup +0.68}(stat.) {+-} 0.11(syst.) x 10{sup -4} and extract an upper limit on the branching fraction, at the 90% confidence level, of {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) < 1.8 x 10{sup -4}. We calculate the product of the B meson decay constant and |V{sub ub}| to be f{sub B} {center_dot} |V{sub ub}| = (7.0{sub -3.6}{sup +2.3}(stat.){sub -0.5}{sup +0.4}(syst.)) x 10{sup -4} GeV.

  15. Microtubule depolymerization and tau phosphorylation.

    PubMed

    Hernández, Félix; García-García, Esther; Avila, Jesús

    2013-01-01

    Inge Grundke-Iqbal and Khalid Iqbal found a connection between microtubule associated tau and Alzheimer's disease. They described that abnormally phosphorylated tau is a component of the paired helical filaments found in the disease. Afterwards they described that tau hyperphosphorylation prevents microtubule assembly. Now trying to complement the relationship between microtubules and tau phosphorylation, we have commented on the effect of microtubule disassembly on tau phosphorylation. In this study, we investigated the role of microtubule depolymerization induced by nocodazole on tau phosphorylation in human neuroblastoma SH-SY5Y cells. Our results indicate that nocodazole provokes tau phosphorylation mediated by GSK3, as determined by using AT-8 or Tau-1 antibodies. Interestingly, total GSK3? and GSK3? phosphorylation on Ser-9 are not altered during nocodazole treatment. In addition, microtubule stabilization with taxol had similar effects, likely because taxol and tau compete for the same binding sites on microtubules, and in the presence of taxol, tau could be detached from microtubules. Thus, unbound tau from microtubles can be phosphorylated by GSK3, even if the activity of GSK3 is not altered, probably because tau unbound to microtubules could be a better substrate for the kinase than microtubule-associated tau. These findings suggest that microtubule depolymerization can be a primary event in neurodegenerative disorders like Alzheimer's disease and that tau phosphorylation takes place afterwards. PMID:23948896

  16. Identification and energy calibration of hadronically decaying tau leptons with the ATLAS experiment in $pp$ collisions at $\\sqrt{s}$=8 TeV

    E-print Network

    ATLAS Collaboration

    2014-12-22

    This paper describes the trigger and offline reconstruction, identification and energy calibration algorithms for hadronic decays of tau leptons employed for the data collected from $pp$ collisions in 2012 with the ATLAS detector at the LHC center-of-mass energy $\\sqrt{\\mathrm{s}} = 8$ TeV. The performance of these algorithms is measured in most cases with Z decays to tau leptons using the full 2012 dataset, corresponding to an integrated luminosity of 20.3 fb$^{-1}$. An uncertainty on the offline reconstructed tau energy scale of 2% to 4%, depending on transverse energy and pseudorapidity, is achieved using two independent methods. The offline tau identification efficiency is measured with a precision of 2.5% for hadronically decaying tau leptons with one associated track, and of 4% for the case of three associated tracks, inclusive in pseudorapidity and for a visible transverse energy greater than $20$ GeV. For hadronic tau lepton decays selected by offline algorithms, the tau trigger identification efficiency is measured with a precision of 2% to 8%, depending on the transverse energy. The performance of the tau algorithms, both offline and at the trigger level, is found to be stable with respect to the number of concurrent proton--proton interactions and has supported a variety of physics results using hadronically decaying tau leptons at ATLAS.

  17. A precise measurement of the tau lepton lifetime

    Microsoft Academic Search

    Damir Buskulic; D. Decamp; C. Goy; J.-P. Lees; M.-N. Minard; B. Mours; R. Alemany; F. Ariztizabal; P. Comas; J. M. Crespo; M C Delfino; E. Fernandez; V. Gaitan; Ll. Garrido; T S Mattison; A. Pacheco; C. Padilla; A. Pascual; D. Creanza; M. de Palma; A. Farilla; Giuseppe Iaselli; G. Maggi; M. Maggi; S. Natali; S. Nuzzo; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; L. A. T. Bauerdick; E. Blucher; G. Bonvicini; F. Bossi; J. Boudreau; D. Casper; H. Drevermann; R. W. Forty; G. Ganis; C. Gay; R. Hagelberg; J. Harvey; S. Haywood; J. Hilgart; R. Jacobsen; B. Jost; J. Knobloch; E. Lançon; I. Lehraus; T. Lohse; A. Lusiani; M. Martinez; P. Mato; H. Meinhard; A. Minten; R. Miquel; H.-G. Moser; P. Palazzi; J F Pusztaszeri; F. Ranjard; G. Redlinger; L. Rolandi; J. Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; F. Sefkow; W. Tejessy; H. Wachsmuth; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; F. Badaud; M. Bardadin-Otwinowska; A. M. Bencheikh; R. El Fellous; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; B. Pietrzyk; J. Proriol; F. Prulhiére; G. Stimpfl; T. Fearnley; J. D. Hansen; J. R. Hansen; R. Møllerud; B. S. Nilsson; I. Efthymiopoulos; A. Kyriakis; Errietta Simopoulou; Anna Vayaki; K. Zachariadou; J. Badier; A. Blondel; G R Bonneaud; J. C. Brient; G. Fouque; S. Orteu; A. Rosowsky; A. Rougé; M. Rumpf; R. Tanaka; M. Verderi; H L Videau; D. J. Candlin; M. I. Parsons; E. Veitch; L. Moneta; G. Parrini; M. Corden; C H Georgiopoulos; M. Ikeda; J E Lannutti; D A Levinthal; Michael E Mermikides; L. Sawyer; S R Wasserbaech; A. Antonelli; R. Baldini; G. Bencivenni; G. Bologna; P. Campana; G. Capon; F. Cerutti; V. Chiarella; B. D'Ettorre-Piazzoli; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; L. Passalacqua; M. Pepe-Altarelli; P. Picchi; B. Altoon; O. Boyle; P. Colrain; I. Ten Have; J. G. Lynch; W. Maitland; C. Raine; J. M. Scarr; K. Smith; A. S. Thompson; R. M. Turnbull; B. Brandl; O. Braun; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; Y. Maumary; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; A. T. Belk; R. Beuselinck; D. M. Binnie; W. Cameron; M. Cattaneo; D. J. Colling; P. J. Dornan; S. Dugeay; A. M. Greene; J. F. Hassard; N. M. Lieske; J. Nash; S. J. Patton; D. G. Payne; M. J. Phillips; J. K. Sedgbeer; I. R. Tomalin; A. G. Wright; E. Kneringer; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Kreemer; M. Nuttall; A. Patel; T. Sloan; S. W. Snow; E. P. Whelan; K. Kleinknecht; J. Raab; B. Renk; H.-G. Sander; H. Schmidt; F. Steeg; S. M. Walther; B. Wolf; J.-J. Aubert; C. Benchouk; A. Bonissent; J. Carr; P. Coyle; J. Drinkard; F. Etienne; S. Papalexiou; P. Payre; Z. Qian; L. Roos; D. Rousseau; P. Schwemling; M. Talby; S. Adlung; C. Bauer; W. Blum; D. Brown; P. Cattaneo; G. Cowan; B. Dehning; H. Dietl; F. Dydak; M. Fernandez-Bosman; M. Frank; A. W. Halley; J. Lauber; G. Lütjens; G. Lutz; W. Männer; R. Richter; H. Rotscheidt; J. Schröder; A. S. Schwarz; R. Settles; H. Seywerd; U. Stierlin; U. Stiegler; R. St. Denis; M. Takashima; J. Thomas; G. Wolf; J. Boucrot; O. Callot; A. Cordier; M. Davier; J.-F. Grivaz; Ph. Heusse; D. E. Jaffe; P. Janot; D. W. Kim; F. Le Diberder; J. Lefrançois; A.-M. Lutz; M.-H. Schune; J.-J. Veillet; I. Videau; Z. Zhang; D. Abbaneo; S. R. Amendolia; G. Bagliesi; G. Batignani; L. Bosisio; U. Bottigli; C. Bozzi; C. Bradaschia; M. Carpinelli; M. A. Ciocci; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foá; E. Focardi; A. Giassi; M. A. Giorgi; F. Ligabue; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; F. Palla; G. Rizzo; G. Sanguinetti; P. Spagnolo; J. Steinberger; R. Tenchini; G. Tonelli; G. Triggiani; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; J. M. Carter; M. G. Green; P. V. March; Ll. M. Mir; T. Medcalf; I. S. Quazi; J. A. Strong; L. R. West; D. R. Botterill; R. W. Clifft; T. R. Edgecock; M. Edwards; S. M. Fisher; T. J. Jones; P. R. Norton; D. P. Salmon; J. C. Thompson; B. Bloch-Devaux; P. Colas; H. Duarte; W. Kozanecki; M. C. Lemaire; E. Locci; S. Loucatos; E. Monnier; P. Perez; F. Perrier; J. Rander; J.-F. Renardy; A. Roussarie; J.-P. Schuller; J. Schwindling; D. Si Mohand; B. Vallage; R. P. Johnson; A. M. Litke; G. Taylor; J. Wear; J. G. Ashman; W. Babbage; C. N. Booth; C. Buttar; R. E. Carney; S. Cartwright; F. Combley; F. Hatfield; P. Reeves; L. F. Thompson; E. Barberio; A. Böhrer; S. Brandt; C. Grupen; F. Rivera; U. Schäfer; G. Giannini; B. Gobbo; F. Ragusa; L. Bellantoni; W. Chen; D. Cinabro; J. S. Conway; D. F. Cowen; Z. Feng; D. P. S. Ferguson; Y. S. Gao; J. Grahl; J. L. Harton; R. C. Jared; B. W. Leclaire; C. Lishka

    1992-01-01

    Three different techniques are used to measure the mean decay length of the tau lepton with a high precision vertex detector in a sample of 11 800 tau pairs coming from Z decays, collected in1991 by ALEPH at LEP. Events in which both tau's decay into one charged track are analyzed using two largely independent methods. Displaced vertices in three-prong

  18. Search for neutral MSSM Higgs bosons decaying to a pair of tau leptons in pp collisions

    SciTech Connect

    Khachatryan, V. [Yerevan Physics Institute (Armenia); et al.,

    2014-10-01

    A search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model (MSSM) decaying to tau-lepton pairs in pp collisions is performed, using events recorded by the CMS experiment at the LHC. The dataset corresponds to an integrated luminosity of 24.6 fb$^{?1}$, with 4.9 fb$^{?1}$ at 7 TeV and 19.7 fb$^{?1}$ at 8 TeV. To enhance the sensitivity to neutral MSSM Higgs bosons, the search includes the case where the Higgs boson is produced in association with a b-quark jet. No excess is observed in the tau-lepton-pair invariant mass spectrum. Exclusion limits are presented in the MSSM parameter space for different benchmark scenarios, m$_{h}^{max}$ , m$_{h}^{mod?+}$ , m$_{h}^{mod??}$ , light-stop, light-stau, ?-phobic, and low-m$_{H}$. Upper limits on the cross section times branching fraction for gluon fusion and b-quark associated Higgs boson production are also given.

  19. Search for neutral MSSM Higgs bosons decaying to a pair of tau leptons in pp collisions

    NASA Astrophysics Data System (ADS)

    Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hartl, C.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Knünz, V.; Krammer, M.; Krätschmer, I.; Liko, D.; Mikulec, I.; Rabady, D.; Rahbaran, B.; Rohringer, H.; Schöfbeck, R.; Strauss, J.; Taurok, A.; Treberer-Treberspurg, W.; Waltenberger, W.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Alderweireldt, S.; Bansal, M.; Bansal, S.; Cornelis, T.; De Wolf, E. A.; Janssen, X.; Knutsson, A.; Luyckx, S.; Ochesanu, S.; Rougny, R.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Van Spilbeeck, A.; Blekman, F.; Blyweert, S.; D'Hondt, J.; Daci, N.; Heracleous, N.; Keaveney, J.; Lowette, S.; Maes, M.; Olbrechts, A.; Python, Q.; Strom, D.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Onsem, G. P.; Villella, I.; Caillol, C.; Clerbaux, B.; De Lentdecker, G.; Dobur, D.; Favart, L.; Gay, A. P. R.; Grebenyuk, A.; Léonard, A.; Mohammadi, A.; Perniè, L.; Reis, T.; Seva, T.; Thomas, L.; Vander Velde, C.; Vanlaer, P.; Wang, J.; Zenoni, F.; Adler, V.; Beernaert, K.; Benucci, L.; Cimmino, A.; Costantini, S.; Crucy, S.; Dildick, S.; Fagot, A.; Garcia, G.; Mccartin, J.; Ocampo Rios, A. A.; Ryckbosch, D.; Salva Diblen, S.; Sigamani, M.; Strobbe, N.; Thyssen, F.; Tytgat, M.; Yazgan, E.; Zaganidis, N.; Basegmez, S.; Beluffi, C.; Bruno, G.; Castello, R.; Caudron, A.; Ceard, L.; Da Silveira, G. G.; Delaere, C.; du Pree, T.; Favart, D.; Forthomme, L.; Giammanco, A.; Hollar, J.; Jafari, A.; Jez, P.; Komm, M.; Lemaitre, V.; Nuttens, C.; Pagano, D.; Perrini, L.; Pin, A.; Piotrzkowski, K.; Popov, A.; Quertenmont, L.; Selvaggi, M.; Vidal Marono, M.; Vizan Garcia, J. M.; Beliy, N.; Caebergs, T.; Daubie, E.; Hammad, G. H.; Aldá, W. L.; Alves, G. A.; Brito, L.; Correa Martins, M.; Dos Reis Martins, T.; Mora Herrera, C.; Pol, M. E.; Carvalho, W.; Chinellato, J.; Custódio, A.; Da Costa, E. M.; De Jesus Damiao, D.; De Oliveira Martins, C.; Fonseca De Souza, S.; Malbouisson, H.; Matos Figueiredo, D.; Mundim, L.; Nogima, H.; Prado Da Silva, W. L.; Santaolalla, J.; Santoro, A.; Sznajder, A.; Tonelli Manganote, E. J.; Vilela Pereira, A.; Bernardes, C. A.; Dogra, S.; Fernandez Perez Tomei, T. R.; Gregores, E. M.; Mercadante, P. G.; Novaes, S. F.; Padula, Sandra S.; Aleksandrov, A.; Genchev, V.; Iaydjiev, P.; Marinov, A.; Piperov, S.; Rodozov, M.; Stoykova, S.; Sultanov, G.; Tcholakov, V.; Vutova, M.; Dimitrov, A.; Glushkov, I.; Hadjiiska, R.; Kozhuharov, V.; Litov, L.; Pavlov, B.; Petkov, P.; Bian, J. G.; Chen, G. M.; Chen, H. S.; Chen, M.; Du, R.; Jiang, C. H.; Plestina, R.; Tao, J.; Wang, Z.; Asawatangtrakuldee, C.; Ban, Y.; Li, Q.; Liu, S.; Mao, Y.; Qian, S. J.; Wang, D.; Zou, W.; Avila, C.; Chaparro Sierra, L. F.; Florez, C.; Gomez, J. P.; Gomez Moreno, B.; Sanabria, J. C.; Godinovic, N.; Lelas, D.; Polic, D.; Puljak, I.; Antunovic, Z.; Kovac, M.; Brigljevic, V.; Kadija, K.; Luetic, J.; Mekterovic, D.; Sudic, L.; Attikis, A.; Mavromanolakis, G.; Mousa, J.; Nicolaou, C.; Ptochos, F.; Razis, P. A.; Bodlak, M.; Finger, M.; Finger, M.; Assran, Y.; Ellithi Kamel, A.; Mahmoud, M. A.; Radi, A.; Kadastik, M.; Murumaa, M.; Raidal, M.; Tiko, A.; Eerola, P.; Fedi, G.; Voutilainen, M.; Härkönen, J.; Karimäki, V.; Kinnunen, R.; Kortelainen, M. J.; Lampén, T.; Lassila-Perini, K.; Lehti, S.; Lindén, T.; Luukka, P.; Mäenpää, T.; Peltola, T.; Tuominen, E.; Tuominiemi, J.; Tuovinen, E.; Wendland, L.; Talvitie, J.; Tuuva, T.; Besancon, M.; Couderc, F.; Dejardin, M.; Denegri, D.; Fabbro, B.; Faure, J. L.; Favaro, C.; Ferri, F.; Ganjour, S.; Givernaud, A.; Gras, P.; Hamel de Monchenault, G.; Jarry, P.; Locci, E.; Malcles, J.; Rander, J.; Rosowsky, A.; Titov, M.; Baffioni, S.; Beaudette, F.; Busson, P.; Charlot, C.; Dahms, T.; Dalchenko, M.; Dobrzynski, L.; Filipovic, N.; Florent, A.; Granier de Cassagnac, R.; Mastrolorenzo, L.; Miné, P.; Mironov, C.; Naranjo, I. N.; Nguyen, M.; Ochando, C.; Paganini, P.; Regnard, S.; Salerno, R.; Sauvan, J. B.; Sirois, Y.; Veelken, C.; Yilmaz, Y.; Zabi, A.; Agram, J.-L.; Andrea, J.; Aubin, A.; Bloch, D.; Brom, J.-M.; Chabert, E. C.; Collard, C.; Conte, E.; Fontaine, J.-C.; Gelé, D.; Goerlach, U.; Goetzmann, C.; Le Bihan, A.-C.; Van Hove, P.; Gadrat, S.; Beauceron, S.; Beaupere, N.; Boudoul, G.; Bouvier, E.; Brochet, S.; Carrillo Montoya, C. A.; Chasserat, J.; Chierici, R.; Contardo, D.; Depasse, P.; El Mamouni, H.; Fan, J.; Fay, J.; Gascon, S.; Gouzevitch, M.; Ille, B.; Kurca, T.; Lethuillier, M.; Mirabito, L.; Perries, S.; Ruiz Alvarez, J. D.; Sabes, D.; Sgandurra, L.; Sordini, V.; Vander Donckt, M.; Verdier, P.; Viret, S.; Xiao, H.; Tsamalaidze, Z.; Autermann, C.; Beranek, S.

    2014-10-01

    A search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model (MSSM) decaying to tau-lepton pairs in pp collisions is performed, using events recorded by the CMS experiment at the LHC. The dataset corresponds to an integrated luminosity of 24.6 fb-1, with 4.9 fb-1 at 7 TeV and 19.7 fb-1 at 8 TeV. To enhance the sensitivity to neutral MSSM Higgs bosons, the search includes the case where the Higgs boson is produced in association with a b-quark jet. No excess is observed in the tau-lepton-pair invariant mass spectrum. Exclusion limits are presented in the MSSM parameter space for different benchmark scenarios, m {h/max}, m {h/mod +}, m {h/mod -}, light-stop, light-stau, ?-phobic, and low- m H. Upper limits on the cross section times branching fraction for gluon fusion and b-quark associated Higgs boson production are also given. [Figure not available: see fulltext.

  20. Measurement of Ds -> tau-vtau and a new limit for B -> tau-vtau

    Microsoft Academic Search

    M. Acciarri; O. Adriani; M. Aguilar-Benitez; S. Ahlen; B. Alpat; J. Alkaraz; G. Alemanni; J. Allaby; A. Aloisio; G. Alverson; M. G. Alviggi; G. Ambrosi; H. Anderhub; V. P. Andreev; T. Angelescu; F. Anselmo; D. Antreasyan; A. Arefiev; T. Azemoon; T. Aziz; P. Bagnaia; L. Baksay; R. C. Ball; S. Banerjee; K. Banicz; R. Barillère; L. Barone; P. Bartalini; A. Baschirotto; M. Basile; R. Battiston; A. Bay; F. Becattini; U. Becker; F. Behner; J. Berdugo; P. Berges; B. Bertucci; B. L. Betev; S. Bhattacharya; M. Biasini; A. Biland; G. M. Bilei; J. J. Blaising; S. C. Blyth; G. J. Bobbink; R. Bock; A. Böhm; B. Borgia; A. Boucham; D. Bourilkov; M. Bourquin; D. Boutigny; J. G. Branson; V. Brigljevic; I. C. Brock; A. Buffini; A. Buijs; J. D. Burger; W. J. Burger; J. Busenitz; X. D. Cai; M. Campanelli; M. Capell; G. Cara Romeo; M. Caria; G. Carlino; A. M. Cartacci; J. Casaus; G. Castellini; F. Cavallari; N. Cavallo; C. Cecchi; M. Cerrada; F. Cesaroni; M. Chamizo; A. Chan; Y. H. Chang; U. K. Chaturvedi; S. V. Chekanov; M. Chemarin; A. Chen; G. Chen; H. F. Chen; H. S. Chen; M. Chen; G. Chiefari; C. Y. Chien; M. T. Choi; L. Cifarelli; F. Cindolo; C. Civinini; I. Clare; R. Clare; H. O. Cohn; G. Coignet; A. P. Colijn; N. Colino; V. Commichau; S. Costantini; F. Cotorobai; B. de La Cruz; A. Csilling; T. S. Dai; R. D'Alessandro; R. de Asmundis; A. Degré; K. Deiters; P. Denes; F. Denotaristefani; D. Dibitonto; M. Diemoz; D. van Dierendonck; F. di Lodovico; C. Dionisi; M. Dittmar; A. Dominguez; A. Doria; I. Dorne; M. T. Dova; E. Drago; D. Duchesneau; P. Duinker; I. Duran; S. Dutta; S. Easo; Yu. Efremenko; H. El Mamouni; A. Engler; F. J. Eppling; F. C. Erné; J. P. Ernenwein; P. Extermann; M. Fabre; R. Faccini; S. Falciano; A. Favara; J. Fay; O. Fedin; M. Felcini; B. Fenyi; T. Ferguson; D. Fernandez; F. Ferroni; H. Fesefeldt; E. Fiandrini; J. H. Field; F. Filthaut; P. H. Fisher; G. Forconi; L. Fredj; K. Freudenreich; C. Furetta; Yu. Galaktionov; S. N. Ganguli; P. Garcia-Abia; S. S. Gau; S. Gentile; J. Gerald; N. Gheordanescu; S. Giagu; S. Goldfarb; J. Goldstein; Z. F. Gong; A. Gougas; G. Gratta; M. W. Gruenewald; V. K. Gupta; A. Gurtu; L. J. Gutay; B. Hartmann; A. Hasan; D. Hatzifotiadou; T. Hebbeker; A. Hervé; W. C. van Hoek; H. Hofer; H. Hoorani; S. R. Hou; G. Hu; V. Innocente; H. Janssen; K. Jenkes; B. N. Jin; L. W. Jones; P. de Jong; I. Josa-Mutuberria; A. Kasser; R. A. Khan; D. Kamrad; Yu. Kamyshkov; J. S. Kapustinsky; Y. Karyotakis; M. Kaur; M. N. Kienzle-Focacci; D. Kim; J. K. Kim; S. C. Kim; Y. G. Kim; W. W. Kinnison; A. Kirkby; D. Kirkby; J. Kirkby; D. Kiss; W. Kittel; A. Klimentov; A. C. König; I. Korolko; V. Koutsenko; R. W. Kraemer; W. Krenz; A. Kunin; P. Ladron de Guevara; G. Landi; C. Lapoint; K. Lassila-Perini; P. Laurikainen; M. Lebeau; A. Lebedev; P. Lebrun; P. Lecomte; P. Lecoq; P. Le Coultre; J. S. Lee; K. Y. Lee; C. Leggett; J. M. Le Goff; R. Leiste; E. Leonardi; P. Levtchenko; C. Li; E. Lieb; W. T. Lin; F. L. Linde; L. Lista; Z. A. Liu; W. Lohmann; E. Longo; W. Lu; Y. S. Lu; K. Lübelsmeyer; C. Luci; D. Luckey; L. Luminari; W. Lustermann; W. G. Ma; M. Maity; G. Majumder; L. Malgeri; A. Malinin; C. Maña; D. Mangeol; S. Mangla; P. Marchesini; A. Marin; J. P. Martin; F. Marzano; G. G. G. Massaro; D. McNally; S. Mele; L. Merola; M. Meschini; W. J. Metzger; M. von der Mey; Y. Mi; A. Mihul; A. J. W. van Mil; G. Mirabelli; J. Mnich; P. Molnar; B. Monteleoni; R. Moore; S. Morganti; T. Moulik; R. Mount; S. Müller; F. Muheim; A. J. M. Muijs; E. Nagy; S. Nahn; M. Napolitano; F. Nessi-Tedaldi; H. Newman; T. Niessen; A. Nippe; A. Nisati; H. Nowak; H. Opitz; G. Organtini; R. Ostonen; P. Pakhlov; D. Pandoulas; S. Paoletti; P. Paolucci; H. K. Park; G. Pascale; G. Passaleva; S. Patricelli; T. Paul; M. Pauluzzi; C. Paus; F. Pauss; D. Peach; Y. J. Pei; S. Pensotti; D. Perret-Gallix; B. Petersen; S. Petrak; A. Pevsner; D. Piccolo; M. Pieri; J. C. Pinto; P. A. Piroué; E. Pistolesi; V. Plyaskin; M. Pohl; V. Pojidaev; H. Postema; N. Produit; D. Prokofiev; G. Rahal-Callot; P. B. Rancoita; M. Rattaggi; G. Raven; P. Razis; K. Read; D. Ren; M. Rescigno; S. Reucroft; T. van Rhee; S. Riemann; K. Riles; O. Rind; S. Ro; A. Robohm; J. Rodin; F. J. Rodriguez; B. P. Roe; L. Romero; S. Rosier-Lees; Ph. Rosselet; W. van Rossum; S. Roth; J. A. Rubio; H. Rykaczewski; J. Salicio; E. Sanchez; M. P. Sanders; A. Santocchia; M. E. Sarakinos; S. Sarkar; M. Sassowsky; G. Sauvage; C. Schäfer; V. Schegelsky; S. Schmidt-Kaerst; D. Schmitz; P. Schmitz; M. Schneegans; N. Scholz; H. Schopper; D. J. Schotanus; J. Schwenke; G. Schwering; C. Sciacca; D. Sciarrino; J. C. Sens; L. Servoli; S. Shevchenko; N. Shivarov; V. Shoutko; J. Shukla; E. Shumilov; A. Shvorob; T. Siedenburg; D. Son; A. Sopczak; V. Soulimov; B. Smith; P. Spillantini; M. Steuer; D. P. Stickland; H. Stone; B. Stoyanov; A. Straessner; K. Strauch; K. Sudhakar

    1997-01-01

    Using a data sample of 1 475 000 Z -> qq(gamma) events collected during 1994 with the L3 detector at LEP, we have studied the purely leptonic decays of heavy flavour mesons, D-s -> tau-vtau and B- -> tau-vtau. A signal is observed in the invariant mass distribution M(gammaD-s) corresponding to the decay sequence D*-s -> gammaD-s, D-s -> tau-vtau,

  1. Zinc Binding Directly Regulates Tau Toxicity Independent of Tau Hyperphosphorylation

    PubMed Central

    Huang, Yunpeng; Wu, Zhihao; Cao, Yu; Lang, Minglin; Lu, Bingwei; Zhou, Bing

    2015-01-01

    SUMMARY Tau hyperphosphorylation is thought to underlie tauopathy. Working in a Drosophila tauopathy model expressing a human Tau mutant (hTauR406W, or Tau*), we show that zinc contributes to the development of Tau toxicity through two independent actions: by increasing Tau phosphorylation and, more significantly, by directly binding to Tau. Elimination of zinc binding through amino acid substitution of Cys residues has a minimal effect on phosphorylation levels yet essentially eliminates Tau toxicity. The toxicity of the zinc-binding-deficient mutant Tau* (Tau*C2A) and overexpression of native Drosophila Tau, also lacking the corresponding zinc-binding Cys residues, are largely impervious to zinc concentration. Importantly, restoration of zinc-binding ability to Tau* by introduction of a zinc-binding residue (His) into the original Cys positions restores zinc-responsive toxicities in proportion to zinc-binding affinities. These results indicate zinc binding is a substantial contributor to tauopathy and have implications for therapy development. PMID:25066125

  2. Search for neutral Higgs bosons decaying to tau pairs in pp collisions at ?s = 7 TeV

    E-print Network

    Alver, B.

    A search for neutral Higgs bosons decaying to tau pairs at a center-of-mass energy of 7 TeV is performed using a dataset corresponding to an integrated luminosity of 4.6 fb[superscript ?1] recorded by the CMS experiment ...

  3. Charged particle pair production associated with a lepton pair in Z decays. indication of an excess in the tau channel

    Microsoft Academic Search

    D. Decamp; B. Deschizeaux; C. Goy; J.-P. Lees; M.-N. Minard; R. Alemany; J. M. Crespo; M C Delfino; E. Fernandez; V. Gaitan; Ll. Garrido; Ll. M. Mir; A. Pacheco; M. G. Catanesi; D. Creanza; M. de Palma; A. Farilla; Giuseppe Iaselli; G. Maggi; M. Maggi; S. Natali; S. Nuzzo; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. S. Gao; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Ruan; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; W. B. Atwood; L. A. T. Bauerdick; F. Bird; E. Blucher; G. Bonvicini; F. Bossi; D. Brown; T. H. Burnett; H. Drevermann; Roger W Forty; C. Grab; R. Hagelberg; S. Haywood; J M Hilgart; B. Jost; M. Kasemann; J. Knobloch; A. Lacourt; E. Lançon; Ivan Lehraus; T. Lohse; A. Marchioro; M. Martinez; P. Mato; S R Menary; Adolf G Minten; A. Miotto; R. Miquel; H.-G. Moser; J. Nash; P. Palazzi; F. Ranjard; G. Redlinger; A E Roth; J E Rothberg; Herbert Rotscheidt; R. St. Denis; D. Schlatter; M. Takashima; M. Talby; W. Tejessy; H W Wachsmuth; S R Wasserbaech; S. Wheeler; W. Wiedenmann; W. Witzeling; J. Wotschack; W. Wu; Ziad J Ajaltouni; Maria Bardadin-Otwinowska; A. Falvard; R. El Fellous; P. Gay; J. Harvey; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; J. Proriol; F. Prulhière; G. Stimpfl; J. D. Hansen; J. R. Hansen; P. H. Hansen; R. Møllerud; E. R. Nielsen; B. S. Nilsson; I. Efthymiopoulos; Errietta Simopoulou; Anna Vayaki; J. Badier; A. Blondel; G R Bonneaud; J. Bourotte; F. Braems; J. C. Brient; G. Fouque; A. Gamess; R. Guirlet; S. Orteu; A. Rosowsky; A. Rougé; M. Rumpf; R. Tanaka; H L Videau; D. J. Candlin; E. Veitch; G. Parrini; M. Corden; C H Georgiopoulos; M. Ikeda; J E Lannutti; D A Levinthal; Michael E Mermikides; L. Sawyer; A. Antonelli; R. Baldini; G. Bencivenni; G. Bologna; P. Campana; G. Capon; F. Cerutti; V. Chiarella; B. D'Ettorre-Piazzoli; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; G. Nicoletti; L. Passalacqua; M. Pepe-Altarelli; P. Picchi; P. Zografou; B. Altoon; O. Boyle; A. W. Halley; I. Ten Have; J. L. Hearns; J. G. Lynch; W. T. Morton; C. Raine; J. M. Scarr; K. Smith; A. S. Thompson; R. M. Turnbull; B. Brandl; O. Braun; R. Geiges; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; Y. Maumary; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; A. T. Belk; R. Beuselinck; David M Binnie; W. Cameron; M. Cattaneo; Peter J Dornan; S. Dugeay; A. M. Greene; N. M. Lieske; S. J. Patton; D. G. Payne; M. J. Phillips; J. K. Sedgbeer; G. Taylor; I. R. Tomalin; A. G. Wright; P. Girtler; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; N. R. Keemer; M. Nuttall; A. Patel; B. S. Rowlingson; T. Sloan; S. W. Snow; E. P. Whelan; T. Barczewski; K. Kleinknecht; J. Raab; B. Renk; S. Roehn; H.-G. Sander; M. Schmelling; H. Schmidt; F. Steeg; S. M. Walther; B. Wolf; J.-P. Albanese; C. Benchouk; V. Bernard; A. Bonissent; D. Courvoisier; F. Etienne; S. Papalexiou; P. Payre; B. Pietrzyk; Z. Qian; H. Becker; W. Blum; P. Cattaneo; G. Cowan; B. Dehning; H. Dietl; F. Dydak; M. Fernandez-Bosman; T. Hansl-Kozanecka; A. Jahn; W. Kozanecki; E. Lange; J. Lauber; G. Lütjens; W. Männer; Y. Pan; R H Richter; J. Schröder; A. S. Schwarz; Ronald Settles; U. Stierlin; J. Thomas; G. Wolf; V. Bertin; J. Boucrot; O. Callot; X. Chen; A. Cordier; M. Ganis; J.-F. Grivaz; Ph. Heusse; P. Janot; D. W. Kim; F R Le Diberder; J. Lefrançois; A.-M. Lutz; J.-J. Veillet; I. Videau; Z. Zhang; F. Zomer; D. Abbaneo; S. R. Amendolia; G. Bagliesi; G. Batignani; L. Bosisio; U. Bottigli; C. Bradaschia; M. Carpinelli; M. A. Ciocci; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; E. Focardi; F. Forti; A. Giassi; M. A. Giorgi; F. Ligabue; A. Lusiani; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; L. Moneta; Fabrizio Palla; G. Sanguinetti; Jack Steinberger; Roberto Tenchini; G. Tonelli; G. Triggiani; C Vannini-Castaldi; A. Venturi; P. G. Verdini; J. Walsh; J. M. Carter; M. G. Green; P. V. March; T. Medcalf; I. S. Quazi; M. R. Saich; J. A. Strong; R. M. Thomas; L. R. West; T. Wildish; David R Botterill; R. W. Clifft; T. R. Edgecock; M. Edwards; S. M. Fisher; T. J. Jones; P. R. Norton; D. P. Salmon; J. C. Thompson; B. Bloch-Devaux; P. Colas; C. Klopfenstein; E. Locci; Sotirios S Loucatos; E. Monnier; P. Perez; J. A. Perlas; F. Perrier; J. Rander; J.-F. Renardy; A. Roussarie; J.-P. Schuller; J. Schwindling; B. Vallage; John Gavin Ashman; C. N. Booth; C M Buttar; R E Carney; S L Cartwright; F. Combley; M. Dinsdale; M. Dogru; F. Hatfield; J. Martin; D. Parker; P. Reeves; L. F. Thompson; S. Brandt; H. Burkhardt; Claus Grupen; H. Meinhard; L. Mirabito; E. Neugebauer; U. Schäfer; H C J Seywerd; G. Apollinari; G. Giannini; B. Gobbo; F. Liello; F. Ragusa; Luigi Rolandi; U. Stiegler; L. Bellantoni; J. F. Boudreau; D. Cinabro; J. S. Conway

    1991-01-01

    In a sample of 200 000 Z decays, events with two leptons and an additional pair of charged particles are studied. The 35 events found show a possible excess in the tau channel compared with the expectation from electroweak processes. The features of the events are consistent with radiation of virtual photons. Supported by the US Department of Energy, contract

  4. Chiral sum rules and vacuum condensates from tau-lepton decay data

    E-print Network

    C. A. Dominguez; L. A. Hernandez; K. Schilcher; H. Spiesberger

    2015-02-16

    QCD finite energy sum rules, together with the latest updated ALEPH data on hadronic decays of the tau-lepton are used in order to determine the vacuum condensates of dimension $d=2$ and $d=4$. These data are also used to check the validity of the Weinberg sum rules, and to determine the chiral condensates of dimension $d=6$ and $d=8$, as well as the chiral correlator at zero momentum, proportional to the counter term of the ${\\cal{O}}(p^4)$ Lagrangian of chiral perturbation theory, $\\bar{L}_{10}$. Suitable (pinched) integration kernels are introduced in the sum rules in order to suppress potential quark-hadron duality violations. We find no compelling indications of duality violations in the kinematic region above $s \\simeq 2.2$ GeV$^2$ after using pinched integration kernels.

  5. Chiral sum rules and vacuum condensates from tau-lepton decay data

    NASA Astrophysics Data System (ADS)

    Dominguez, C. A.; Hernandez, L. A.; Schilcher, K.; Spiesberger, H.

    2015-03-01

    QCD finite energy sum rules, together with the latest updated ALEPH data on hadronic decays of the tau-lepton are used in order to determine the vacuum condensates of dimension d = 2 and d = 4. These data are also used to check the validity of the Weinberg sum rules, and to determine the chiral condensates of dimension d = 6 and d = 8, as well as the chiral correlator at zero momentum, proportional to the counter term of the Lagrangian of chiral perturbation theory, . Suitable (pinched) integration kernels are introduced in the sum rules in order to suppress potential quark-hadron duality violations. We find no compelling indications of duality violations in the kinematic region above s ? 2 .2 GeV2 after using pinched integration kernels.

  6. Joint Extraction of m_s and V_us from Hadronic Tau Decays

    E-print Network

    K. Maltman; C. E. Wolfe

    2007-01-04

    We study the simultaneous determination of m_s and V_us from flavor-breaking hadronic tau decay sum rules using weights designed to bring under better control problems associated with the slow convergence of the relevant D=2 OPE series. Much improved stability and consistency is found as compared to the results of conventional analyses based on the ``(k,0) spectral weights''. Results for m_s are in excellent agreement with those of recent strange scalar and strange pseudoscalar sum rule analyses, as well as recent lattice analyses, while those for V_us agree within errors with the output from recent lattice-based Gamma[K_{mu 2}]/Gamma[pi_{mu 2}] and K_{\\ell 3}-based analyses. Very significant error reductions are shown to be expected, especially for V_us, once the improved strange spectral data from the B factory experiments becomes available.

  7. The Joint Extraction of m_s and V_us From Hadronic Tau Decay Data

    E-print Network

    K. Maltman; C. E. Wolfe

    2006-11-13

    We discuss the simultaneous determination of m_s and V_us from flavor-breaking hadronic tau decay sum rules, focussing on weight choices designed to better control problems associated with the slow convergence of the relevant integrated D=2 OPE series. The results are found to display improved stability and consistency relative to those of conventional analyses based on the ``(k,0) spectral weights''. The results for m_s agree well with those of recent strange scalar sum rule and strange pseudoscalar sum rule and lattice analyses. Results for V_us agree within errors with those of lattice-input-based K_{ell 3} and Gamma [K_{mu 2}]/\\Gamma [pi_{mu 2}] analyses. Very significant error reductions are shown to be expected, especially for V_us, once improved strange spectral data from the B factory experiments becomes available.

  8. Study of the five-charged-pion decay of the tau lepton

    Microsoft Academic Search

    D. Gibaut; K. Kinoshita; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'grady; J. Urheim; A. J. Weinstein; D. Acosta; M. Athanas; G. Masek; H. P. Paar; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; A. Ryd; H. Tajima; D. Sperka; M. S. Witherell; M. Procario; R. Balest; K. Cho; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; P. S. Drell; R. Ehrlich; P. Gaidarev; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; S. Salman; M. Sapper; F. Wuerthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; S. Yang; J. Yelton; D. Cinabro; S. Henderson; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; G. Gollin; B. Ong; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; M. Ogg; A. Bellerive; D. I. Britton; E. R. Hyatt; D. B. Macfarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; S. Kotov; I. Kravchenko; N. Kwak; H. Lam; Y. Kubota; M. Lattery; M. Momayezi; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'neill; H. Severini; C. R. Sun; M. M. Zoeller; G. Crawford; C. M. Daubenmier; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; R. Malchow; Y. Skovpen; M. Sung; C. White; F. Butler; X. Fu; G. Kalbfleisch; W. R. Ross; P. Skubic; M. Wood; J. Fast; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; D. Payne; E. I. Shibata; I. P. Shipsey; P. N. Wang; M. Battle; J. Ernst; L. Gibbons; Y. Kwon; S. Roberts; E. H. Thorndike; C. H. Wang; J. Dominick; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; P. Zadorozhny; M. Artuso; M. Goldberg; D. He; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; S. Stone; M. Thulasidas; G. Vasseur; X. Xing; G. Zhu; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain

    1994-01-01

    The branching fractions for the five-charged-particle decays of the tau lepton have been measured in e+e- annihilations using the CLEO II detector at the Cornell Electron Storage Ring. Assuming all charged particles to be pions, the results are B(3pi-2pi+>=0 neutrals nutau)=(0.097+\\/-0.005+\\/-0.011)%, B(3pi-2pi+nutau)=(0.077+\\/-0.005 +\\/-0.009)%, B(3pi-2pi+pi0nutau)=(0.019+\\/-0.004+\\/-0.004)%, and B(3pi-2pi+2pi0nutau)<0.011% at the 90% C.L. B(3pi-2pi-pi0nutau) is measured for the first time by exclusive pi0

  9. Search for Higgs bosons decaying to tau pairs in pp over collisions with the D0 detector.

    PubMed

    Abazov, V M; Abbott, B; Abolins, M; Acharya, B S; Adams, M; Adams, T; Aguilo, E; Ahn, S H; Ahsan, M; Alexeev, G D; Alkhazov, G; Alton, A; Alverson, G; Alves, G A; Anastasoaie, M; Ancu, L S; Andeen, T; Anderson, S; Andrieu, B; Anzelc, M S; Aoki, M; Arnoud, Y; Arov, M; Arthaud, M; Askew, A; Asman, B; Assis Jesus, A C S; Atramentov, O; Avila, C; Badaud, F; Baden, A; Bagby, L; Baldin, B; Bandurin, D V; Banerjee, P; Banerjee, S; Barberis, E; Barfuss, A-F; Bargassa, P; Baringer, P; Barreto, J; Bartlett, J F; Bassler, U; Bauer, D; Beale, S; Bean, A; Begalli, M; Begel, M; Belanger-Champagne, C; Bellantoni, L; Bellavance, A; Benitez, J A; Beri, S B; Bernardi, G; Bernhard, R; Bertram, I; Besançon, M; Beuselinck, R; Bezzubov, V A; Bhat, P C; Bhatnagar, V; Biscarat, C; Blazey, G; Blekman, F; Blessing, S; Bloch, D; Bloom, K; Boehnlein, A; Boline, D; Bolton, T A; Boos, E E; Borissov, G; Bose, T; Brandt, A; Brock, R; Brooijmans, G; Bross, A; Brown, D; Buchanan, N J; Buchholz, D; Buehler, M; Buescher, V; Bunichev, V; Burdin, S; Burke, S; Burnett, T H; Buszello, C P; Butler, J M; Calfayan, P; Calvet, S; Cammin, J; Carvalho, W; Casey, B C K; Castilla-Valdez, H; Chakrabarti, S; Chakraborty, D; Chan, K; Chan, K M; Chandra, A; Charles, F; Cheu, E; Chevallier, F; Cho, D K; Choi, S; Choudhary, B; Christofek, L; Christoudias, T; Cihangir, S; Claes, D; Clutter, J; Cooke, M; Cooper, W E; Corcoran, M; Couderc, F; Cousinou, M-C; Crépé-Renaudin, S; Cutts, D; Cwiok, M; da Motta, H; Das, A; Davies, G; De, K; de Jong, S J; De La Cruz-Burelo, E; De Oliveira Martins, C; Degenhardt, J D; Déliot, F; Demarteau, M; Demina, R; Denisov, D; Denisov, S P; Desai, S; Diehl, H T; Diesburg, M; Dominguez, A; Dong, H; Dudko, L V; Duflot, L; Dugad, S R; Duggan, D; Duperrin, A; Dyer, J; Dyshkant, A; Eads, M; Edmunds, D; Ellison, J; Elvira, V D; Enari, Y; Eno, S; Ermolov, P; Evans, H; Evdokimov, A; Evdokimov, V N; Ferapontov, A V; Ferbel, T; Fiedler, F; Filthaut, F; Fisher, W; Fisk, H E; Fortner, M; Fox, H; Fu, S; Fuess, S; Gadfort, T; Galea, C F; Gallas, E; Garcia, C; Garcia-Bellido, A; Gavrilov, V; Gay, P; Geist, W; Gelé, D; Gerber, C E; Gershtein, Y; Gillberg, D; Ginther, G; Gollub, N; Gómez, B; Goussiou, A; Grannis, P D; Greenlee, H; Greenwood, Z D; Gregores, E M; Grenier, G; Gris, Ph; Grivaz, J-F; Grohsjean, A; Grünendahl, S; Grünewald, M W; Guo, F; Guo, J; Gutierrez, G; Gutierrez, P; Haas, A; Hadley, N J; Haefner, P; Hagopian, S; Haley, J; Hall, I; Hall, R E; Han, L; Harder, K; Harel, A; Hauptman, J M; Hauser, R; Hays, J; Hebbeker, T; Hedin, D; Hegeman, J G; Heinson, A P; Heintz, U; Hensel, C; Herner, K; Hesketh, G; Hildreth, M D; Hirosky, R; Hobbs, J D; Hoeneisen, B; Hoeth, H; Hohlfeld, M; Hong, S J; Hossain, S; Houben, P; Hu, Y; Hubacek, Z; Hynek, V; Iashvili, I; Illingworth, R; Ito, A S; Jabeen, S; Jaffré, M; Jain, S; Jakobs, K; Jarvis, C; Jesik, R; Johns, K; Johnson, C; Johnson, M; Jonckheere, A; Jonsson, P; Juste, A; Kajfasz, E; Kalk, J M; Karmanov, D; Kasper, P A; Katsanos, I; Kau, D; Kaushik, V; Kehoe, R; Kermiche, S; Khalatyan, N; Khanov, A; Kharchilava, A; Kharzheev, Y M; Khatidze, D; Kim, T J; Kirby, M H; Kirsch, M; Klima, B; Kohli, J M; Konrath, J-P; Kozelov, A V; Kraus, J; Krop, D; Kuhl, T; Kumar, A; Kupco, A; Kurca, T; Kuzmin, V A; Kvita, J; Lacroix, F; Lam, D; Lammers, S; Landsberg, G; Lebrun, P; Lee, W M; Leflat, A; Lellouch, J; Leveque, J; Li, J; Li, L; Li, Q Z; Lietti, S M; Lima, J G R; Lincoln, D; Linnemann, J; Lipaev, V V; Lipton, R; Liu, Y; Liu, Z; Lobodenko, A; Lokajicek, M; Love, P; Lubatti, H J; Luna, R; Lyon, A L; Maciel, A K A; Mackin, D; Madaras, R J; Mättig, P; Magass, C; Magerkurth, A; Mal, P K; Malbouisson, H B; Malik, S; Malyshev, V L; Mao, H S; Maravin, Y; Martin, B; McCarthy, R; Melnitchouk, A; Mendoza, L; Mercadante, P G; Merkin, M; Merritt, K W; Meyer, A; Meyer, J; Millet, T; Mitrevski, J; Mommsen, R K; Mondal, N K; Moore, R W; Moulik, T; Muanza, G S; Mulhearn, M; Mundal, O; Mundim, L; Nagy, E; Naimuddin, M; Narain, M; Naumann, N A; Neal, H A; Negret, J P; Neustroev, P; Nilsen, H; Nogima, H; Novaes, S F; Nunnemann, T; O'Dell, V; O'Neil, D C; Obrant, G; Ochando, C; Onoprienko, D; Oshima, N; Osman, N; Osta, J; Otec, R; Otero y Garzón, G J; Owen, M; Padley, P; Pangilinan, M; Parashar, N; Park, S-J; Park, S K; Parsons, J; Partridge, R; Parua, N; Patwa, A; Pawloski, G; Penning, B; Perfilov, M; Peters, K; Peters, Y; Pétroff, P; Petteni, M; Piegaia, R; Piper, J; Pleier, M-A; Podesta-Lerma, P L M; Podstavkov, V M; Pogorelov, Y; Pol, M-E; Polozov, P; Pope, B G; Popov, A V; Potter, C; da Silva, W L Prado; Prosper, H B; Protopopescu, S; Qian, J; Quadt, A; Quinn, B; Rakitine, A; Rangel, M S; Ranjan, K; Ratoff, P N; Renkel, P; Reucroft, S; Rich, P; Rieger, J; Rijssenbeek, M; Ripp-Baudot, I; Rizatdinova, F; Robinson, S; Rodrigues, R F; Rominsky, M; Royon, C; Rubinov, P; Ruchti, R; Safronov, G; Sajot, G

    2008-08-15

    We present a search for the production of neutral Higgs bosons varphi decaying into tau+tau - final states in pp over collisions at a center-of-mass energy of 1.96 TeV. The data, corresponding to an integrated luminosity of approximately 1 fb(-1), were collected by the D0 experiment at the Fermilab Tevatron Collider. Limits on the production cross section times branching ratio are set. The results are interpreted in the minimal supersymmetric standard model yielding limits that are the most stringent to date at hadron colliders. PMID:18764524

  10. Do new data on B{sup +{yields}{tau}+{nu}}{sub {tau}} decays point to an early discovery of supersymmetry at the LHC?

    SciTech Connect

    Bhattacherjee, Biplob; Dighe, Amol; Ghosh, Diptimoy; Raychaudhuri, Sreerup [Department of Theoretical Physics, Tata Institute of Fundamental Research, 1, Homi Bhabha Road, Mumbai 400 005 (India)

    2011-05-01

    The recent Belle and BABAR measurements of the branching ratio of B{sup +{yields}{tau}+{nu}}{sub {tau}} indicate a significant deviation from the standard model prediction. We demonstrate that this measurement has a serious impact on models with minimal flavor violation involving a charged Higgs boson, ruling out a large portion of the currently allowed parameter space. In the constrained minimal supersymmetric standard model, this creates a tension between the measurements of B{sup +{yields}{tau}+{nu}}{sub {tau}} and the anomalous magnetic moment of the muon, unless tan{beta} is small, {mu}>0, and A{sub 0} takes a large negative value. In fact, a very small region of the parameter space of this model, with small values of m{sub 0} and m{sub 1/2}, survives all the constraints at 95% C.L. It is remarkable that this specific region is still consistent with the lightest supersymmetric particle as the dark matter. Moreover, it predicts observable supersymmetric signals in the early runs of the LHC, even perhaps at 7 TeV. We also show that a consistent explanation for the deviation of the B{sup +{yields}{tau}+{nu}}{sub {tau}} branching ratio from the standard model can be achieved in a nonuniversal Higgs-mass model, which could also predict early signals of supersymmetry at the LHC.

  11. Recent Results From BaBar in Tau Physics

    SciTech Connect

    Lewczuk, Mateusz; /Victoria U.

    2009-06-25

    The BaBar collaboration has accumulated over 400 million {tau}-pairs which can be used to study charged leptonic and hadronic weak currents to unprecedented precision. This note presents results on lepton universality, measurements of |V{sub us}|, and searches for {tau} decays which violate lepton flavour conservation, or {tau} decays that proceed through a suppressed second class current.

  12. Search for neutral MSSM Higgs bosons decaying to tau(+)tau(-) pairs in proton-proton collisions root s=7 TeV with the ATLAS detector

    SciTech Connect

    Aad, G.; Abbott, B; Abdallah, J; Abdelalim, AA; Abdesselam, A; Abdinov, O; Abi, B; Abolins, M; Abramowicz, H; Abreu, H; Acerbi, E; Acharya, BS; Adams, DL; Addy, TN; Adelman, J; Aderholz, M; Adomeit, S; Adragna, P; Adye, T; Aefsky, S; Aguilar-Saavedra, JA

    2011-11-11

    A search for neutral Higgs bosons decaying to pairs of {tau} leptons with the ATLAS detector at the LHC is presented. The analysis is based on proton-proton collisions at a center-of-mass energy of 7 TeV, recorded in 2010 and corresponding to an integrated luminosity of 36 pb{sup -1}. After signal selection, 276 events are observed in this data sample. The observed number of events is consistent with the total expected background of 269 {+-} 36 events. Exclusion limits at the 95% confidence level are derived for the production cross section of a generic Higgs boson {phi} as a function of the Higgs boson mass and for A/H/h production in the Minimal Supersymmetric Standard Model (MSSM) as a function of the parameters m{sub A} and tan {beta}.

  13. Search for a low-mass higgs boson in Upsilon(3S)-->gammaA(0), A(0)-->tau(+)tau(-) at BABAR.

    PubMed

    Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Tico, J Garra; Grauges, E; Martinelli, M; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Battaglia, M; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G; Osipenkov, I L; Tackmann, K; Tanabe, T; Hawkes, C M; Soni, N; Watson, A T; Koch, H; Schroeder, T; Asgeirsson, D J; Fulsom, B G; Hearty, C; Mattison, T S; McKenna, J A; Barrett, M; Khan, A; Randle-Conde, A; Blinov, V E; Bukin, A D; Buzykaev, A R; Druzhinin, V P; Golubev, V B; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Solodov, E P; Todyshev, K Yu; Bondioli, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, A J; Lund, P; Mandelkern, M; Martin, E C; Stoker, D P; Atmacan, H; Gary, J W; Liu, F; Long, O; Vitug, G M; Yasin, Z; Sharma, V; Campagnari, C; Hong, T M; Kovalskyi, D; Mazur, M A; Richman, J D; Beck, T W; Eisner, A M; Heusch, C A; Kroseberg, J; Lockman, W S; Martinez, A J; Schalk, T; Schumm, B A; Seiden, A; Wang, L; Winstrom, L O; Cheng, C H; Doll, D A; Echenard, B; Fang, F; Hitlin, D G; Narsky, I; Ongmongkolkul, P; Piatenko, T; Porter, F C; Andreassen, R; Mancinelli, G; Meadows, B T; Mishra, K; Sokoloff, M D; Bloom, P C; Ford, W T; Gaz, A; Hirschauer, J F; Nagel, M; Nauenberg, U; Smith, J G; Wagner, S R; Ayad, R; Toki, W H; Wilson, R J; Feltresi, E; Hauke, A; Jasper, H; Karbach, T M; Merkel, J; Petzold, A; Spaan, B; Wacker, K; Kobel, M J; Nogowski, R; Schubert, K R; Schwierz, R; Bernard, D; Latour, E; Verderi, M; Clark, P J; Playfer, S; Watson, J E; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cecchi, A; Cibinetto, G; Fioravanti, E; Franchini, P; Luppi, E; Munerato, M; Negrini, M; Petrella, A; Piemontese, L; Santoro, V; Baldini-Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Pacetti, S; Patteri, P; Peruzzi, I M; Piccolo, M; Rama, M; Zallo, A; Contri, R; Guido, E; Lo Vetere, M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Tosi, S; Chaisanguanthum, K S; Morii, M; Adametz, A; Marks, J; Schenk, S; Uwer, U; Bernlochner, F U; Klose, V; Lacker, H M; Lueck, T; Volk, A; Bard, D J; Dauncey, P D; Tibbetts, M; Behera, P K; Charles, M J; Mallik, U; Cochran, J; Crawley, H B; Dong, L; Eyges, V; Meyer, W T; Prell, S; Rosenberg, E I; Rubin, A E; Gao, Y Y; Gritsan, A V; Guo, Z J; Arnaud, N; Béquilleux, J; D'Orazio, A; Davier, M; Derkach, D; da Costa, J Firmino; Grosdidier, G; Le Diberder, F; Lepeltier, V; Lutz, A M; Malaescu, B; Pruvot, S; Roudeau, P; Schune, M H; Serrano, J; Sordini, V; Stocchi, A; Wormser, G; Lange, D J; Wright, D M; Bingham, I; Burke, J P; Chavez, C A; Fry, J R; Gabathuler, E; Gamet, R; Hutchcroft, D E; Payne, D J; Touramanis, C; Bevan, A J; Clarke, C K; Di Lodovico, F; Sacco, R; Sigamani, M; Cowan, G; Paramesvaran, S; Wren, A C; Brown, D N; Davis, C L; Denig, A G; Fritsch, M; Gradl, W; Hafner, A; Alwyn, K E; Bailey, D; Barlow, R J; Jackson, G; Lafferty, G D; West, T J; Yi, J I; Anderson, J; Chen, C; Jawahery, A; Roberts, D A; Simi, G; Tuggle, J M; Dallapiccola, C; Salvati, E; Cowan, R; Dujmic, D; Fisher, P H; Henderson, S W; Sciolla, G; Spitznagel, M; Yamamoto, R K; Zhao, M; Patel, P M; Robertson, S H; Schram, M; Biassoni, P; Lazzaro, A; Lombardo, V; Palombo, F; Stracka, S; Cremaldi, L; Godang, R; Kroeger, R; Sonnek, P; Summers, D J; Zhao, H W; Simard, M; Taras, P; Nicholson, H; De Nardo, G; Lista, L; Monorchio, D; Onorato, G; Sciacca, C; Raven, G; Snoek, H L; Jessop, C P; Knoepfel, K J; Losecco, J M; Wang, W F; Corwin, L A; Honscheid, K; Kagan, H; Kass, R; Morris, J P; Rahimi, A M; Sekula, S J; Wong, Q K; Blount, N L; Brau, J; Frey, R; Igonkina, O; Kolb, J A; Lu, M; Rahmat, R; Sinev, N B; Strom, D; Strube, J; Torrence, E; Castelli, G; Gagliardi, N; Margoni, M; Morandin, M; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Voci, C; Del Amo Sanchez, P; Ben-Haim, E; Bonneaud, G R; Briand, H; Chauveau, J; Hamon, O; Leruste, Ph; Marchiori, G; Ocariz, J; Perez, A; Prendki, J; Sitt, S; Gladney, L; Biasini, M; Manoni, E; Angelini, C; Batignani, G; Bettarini, S; Calderini, G; Carpinelli, M; Cervelli, A; Forti, F; Giorgi, M A; Lusiani, A; Morganti, M; Neri, N; Paoloni, E; Rizzo, G; Walsh, J J; Lopes Pegna, D; Lu, C; Olsen, J; Smith, A J S; Telnov, A V; Anulli, F; Baracchini, E; Cavoto, G; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Jackson, P D; Gioi, L Li; Mazzoni, M A; Morganti, S; Piredda, G; Renga, F; Voena, C; Ebert, M; Hartmann, T; Schröder, H; Waldi, R; Adye, T; Franek, B; Olaiya, E O; Wilson, F F; Emery, S; Esteve, L; Hamel de Monchenault, G; Kozanecki, W; Vasseur, G; Yèche, Ch; Zito, M; Allen, M T; Aston, D; Bartoldus, R; Benitez, J F; Cenci, R; Coleman, J P; Convery, M R; Dingfelder, J C; Dorfan, J; Dubois-Felsmann, G P; Dunwoodie, W; Field, R C; Sevilla, M Franco; Gabareen, A M; Graham, M T; Grenier, P; Hast, C; Innes, W R; Kaminski, J; Kelsey, M H; Kim, H; Kim, P; Kocian, M L; Leith, D W G S; Li, S

    2009-10-30

    We search for a light Higgs boson A0 in the radiative decay Upsilon(3S)-->gammaA(0), A(0)-->tau+tau-, tau+-->e+nu(e)nu(tau), or tau+-->mu+nu(mu)nu(tau). The data sample contains 122x10(6) Upsilon(3S) events recorded with the BABAR detector. We find no evidence for a narrow structure in the studied tau+tau- invariant mass region of 4.03tau+tau-)<10.10 GeV/c2. We exclude at the 90% confidence level (C.L.) a low-mass Higgs boson decaying to tau+tau- with a product branching fraction B(Upsilon(3S)-->gammaA(0))xB(A(0)-->tau+tau-)>(1.5-16)x10(-5) across the m(tau+tau-) range. We also set a 90% C.L. upper limit on the tau+tau- decay of the eta(b) at B(eta(b)-->tau+tau-)<8%. PMID:19905799

  14. Measurement of the branching fractions of the radiative leptonic tau decays tau -> e gamma nu anti-nu and tau -> mu gamma nu anti-nu at BaBar

    E-print Network

    The BaBar Collaboration

    2015-02-06

    We perform a measurement of the tau -> l gamma nu anti-nu (l = e, mu) branching fractions for a minimum photon energy of 10 MeV in the tau rest frame, using 431fb^-1 of e^+e^- collisions collected at the center-of-mass energy of the Upsilon(4S) resonance with the BaBar detector at the PEP-II storage rings. We find B(tau -> mu gamma nu anti-nu ) = (3.69pm0.03pm0.10)x10^-3, and B(tau -> e gamma nu anti-nu ) = (1.847pm0.015pm0.052)x10^-2, where the first quoted error is statistical, and the second is systematic. These results are substantially more precise than previous measurements.

  15. Search for the Higgs Boson Decaying to Two Tau Leptons in Proton-Antiproton Collisions at a Center of Mass Energy of 1.96 TeV

    E-print Network

    Elagin, Andrey

    2012-02-14

    A search for the Higgs boson decaying to tau tau using 7.8 fb^-1 of pp collisions at 1.96 TeV collected with CDF II detector is presented. The search is sensitive to four production mechanisms of the Higgs boson: ggH, WH, ZH and VBF. Modes where one...

  16. Impact of $\\tau$ polarization on the study of the MSSM charged Higgs bosons in top quark decays at the ILC

    SciTech Connect

    Boos, E.; Bunichev, V.; Carena, Marcela S.; Wagner, C.E.M.

    2005-07-01

    The process of top quark pair production at the ILC with subsequent decays of one of the top quarks to a charged Higgs boson and b-quark is considered. The charged Higgs decays to tau leptons whose polarization is the opposite to those coming from W bosons. This difference is reflected in the energy distributions of the tau decay products in the top quark rest frame, which can be reconstructed at the ILC using the recoil mass technique. We present an analysis including spin correlations, backgrounds, ISR/FSR and beamstrahlung, and show that a fit of the shape of the pion energy spectrum yields the charged Higgs boson mass with an accuracy of about 1 GeV.

  17. Anesthesia and Tau Pathology

    PubMed Central

    Whittington, Robert A.; Bretteville, Alexis; Dickler, Maya F.; Planel, Emmanuel

    2013-01-01

    Alzheimer’s disease (AD) is the most common form of dementia and remains a growing worldwide health problem. As life expectancy continues to increase, the number of AD patients presenting for surgery and anesthesia will steadily rise. The etiology of sporadic AD is thought to be multifactorial, with environmental, biological and genetic factors interacting together to influence AD pathogenesis. Recent reports suggest that general anesthetics may be such a factor and may contribute to the development and exacerbation of this neurodegenerative disorder. Intra-neuronal neurofibrillary tangles (NFT), composed of hyperphosphorylated and aggregated tau protein are one of the main neuropathological hallmarks of AD. Tau pathology is important in AD as it correlates very well with cognitive dysfunction. Lately, several studies have begun to elucidate the mechanisms by which anesthetic exposure might affect the phosphorylation, aggregation and function of this microtubule-associated protein. Here, we specifically review the literature detailing the impact of anesthetic administration on aberrant tau hyperphosphorylation as well as the subsequent development of neurofibrillary pathology and degeneration. PMID:23535147

  18. Study of {tau}{sup -}{yields}VP{sup -}{nu}{sub {tau}} in the framework of resonance chiral theory

    SciTech Connect

    Guo Zhihui [Department of Physics, Peking University, Beijing 100871 (China) and IFIC, CSIC-Universitat de Valencia, Apt. Correus 22085, E-46071, Valencia (Spain)

    2008-08-01

    In this paper we study two kinds of {tau} decays: (a) {tau}{sup -}{yields}({rho}{sup 0}{pi}{sup -},{omega}{pi}{sup -},{phi}{pi}{sup -},K*{sup 0}K{sup -}){nu}{sub {tau}}, which belong to {delta}S=0 processes and (b) {delta}S=1 processes, such as {tau}{sup -}{yields}({rho}{sup 0}K{sup -},{omega}K{sup -},{phi}K{sup -},K*{sup 0}{pi}{sup -}){nu}{sub {tau}}, in the framework of resonance chiral theory (R{chi}T). We fit the {tau}{sup -}{yields}{omega}{pi}{sup -}{nu}{sub {tau}} spectral function and the invariant mass distribution of {omega}K in the process of {tau}{sup -}{yields}{omega}K{sup -}{nu}{sub {tau}} to get the values of unknown resonance couplings. Then we make a prediction for branching ratios of all channels.

  19. Measurement of the tau Neutrino Helicity and Michel Parameters in Polarized e+e- Collisions

    Microsoft Academic Search

    K. Abe; T. Akagi; N. J. Allen; W. W. Ash; D. Aston; K. G. Baird; C. Baltay; H. R. Band; M. B. Barakat; G. Baranko; O. Bardon; T. L. Barklow; G. L. Bashindzhagyan; A. O. Bazarko; R. Ben-David; A. C. Benvenuti; G. M. Bilei; D. Bisello; G. Blaylock; J. R. Bogart; B. Bolen; T. Bolton; G. R. Bower; J. E. Brau; M. Breidenbach; W. M. Bugg; D. Burke; T. H. Burnett; P. N. Burrows; W. Busza; A. Calcaterra; D. O. Caldwell; D. Calloway; B. Camanzi; M. Carpinelli; R. Cassell; R. Castaldi; A. Castro; M. Cavalli-Sforza; A. Chou; E. Church; H. O. Cohn; J. A. Coller; V. Cook; R. Cotton; R. F. Cowan; D. G. Coyne; G. Crawford; A. D'Oliveira; C. J. Damerell; M. Daoudi; R. de Sangro; R. dell'Orso; P. J. Dervan; M. Dima; D. N. Dong; P. Y. Du; R. Dubois; B. I. Eisenstein; R. Elia; E. Etzion; S. Fahey; D. Falciai; C. Fan; J. P. Fernandez; M. J. Fero; R. Frey; K. Furuno; T. Gillman; G. Gladding; S. Gonzalez; E. L. Hart; J. L. Harton; A. Hasan; Y. Hasegawa; K. Hasuko; S. J. Hedges; S. S. Hertzbach; M. D. Hildreth; J. Huber; M. E. Huffer; E. W. Hughes; H. Hwang; Y. Iwasaki; D. J. Jackson; P. Jacques; J. A. Jaros; A. S. Johnson; J. R. Johnson; R. A. Johnson; T. Junk; R. Kajikawa; M. Kalelkar; H. J. Kang; I. Karliner; H. Kawahara; H. W. Kendall; Y. D. Kim; M. E. King; R. King; R. R. Kofler; N. M. Krishna; R. S. Kroeger; J. F. Labs; M. Langston; A. Lath; J. A. Lauber; D. W. Leith; V. Lia; M. X. Liu; X. Liu; M. Loreti; A. Lu; H. L. Lynch; J. Ma; G. Mancinelli; S. Manly; G. Mantovani; T. W. Markiewicz; T. Maruyama; H. Masuda; E. Mazzucato; A. K. McKemey; B. T. Meadows; R. Messner; P. M. Mockett; K. C. Moffeit; T. B. Moore; D. Muller; T. Nagamine; S. Narita; U. Nauenberg; H. Neal; M. Nussbaum; Y. Ohnishi; L. S. Osborne; R. S. Panvini; C. H. Park; T. J. Pavel; I. Peruzzi; M. Piccolo; L. Piemontese; E. Pieroni; K. T. Pitts; R. J. Plano; R. Prepost; C. Y. Prescott; G. D. Punkar; J. Quigley; B. N. Ratcliff; T. W. Reeves; J. Reidy; P. L. Reinertsen; P. E. Rensing; L. S. Rochester; P. C. Rowson; J. J. Russell; O. H. Saxton; T. Schalk; R. H. Schindler; B. A. Schumm; S. Sen; V. V. Serbo; M. H. Shaevitz; J. T. Shank; G. Shapiro; D. J. Sherden; K. D. Shmakov; C. Simopoulos; N. B. Sinev; S. R. Smith; M. B. Smy; J. A. Snyder; P. Stamer; H. Steiner; R. Steiner; M. G. Strauss; D. Su; F. Suekane; A. Sugiyama; S. Suzuki; M. Swartz; A. Szumilo; T. Takahashi; F. E. Taylor; E. Torrence; A. I. Trandafir; J. D. Turk; T. Usher; J. Va'Vra; C. Vannini; E. Vella; J. P. Venuti; R. Verdier; P. G. Verdini; D. L. Wagner; S. R. Wagner; A. P. Waite; S. J. Watts; A. W. Weidemann; E. R. Weiss; J. S. Whitaker; S. L. White; F. J. Wickens; D. A. Williams; S. H. Williams; S. Willocq; R. J. Wilson; W. J. Wisniewski; M. Woods; G. B. Word; J. Wyss; R. K. Yamamoto; J. M. Yamartino; X. Yang; J. Yashima; S. J. Yellin; C. C. Young; H. Yuta; G. Zapalac; R. W. Zdarko; J. Zhou

    1997-01-01

    We present a new measurement of the tau neutrino helicity hnutau and the tau Michel parameters rho, eta, xi, and the product deltaxi. The analysis exploits the highly polarized SLC electron beam to extract these quantities directly from a measurement of the tau decay spectra, using the 1993-1995 SLD data sample of 4328 e+e--->Z0-->tau+tau- events. From the decays tau-->pinutau and

  20. Studies of {tau}{sup -}{yields}{eta}K{sup -}{nu}{sub {tau}} and {tau}{sup -}{yields}{eta}{pi}{sup -}{nu}{sub {tau}} at BABAR and a search for a second-class current

    SciTech Connect

    Amo Sanchez, P. del; Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V. [Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France); Garra Tico, J.; Grauges, E. [Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain); Martinelli, M.; Palano, A.; Pappagallo, M. [INFN Sezione di Bari, I-70126 Bari (Italy); Dipartimento di Fisica, Universita di Bari, I-70126 Bari (Italy); Eigen, G.; Stugu, B.; Sun, L. [University of Bergen, Institute of Physics, N-5007 Bergen (Norway); Battaglia, M.; Brown, D. N.; Hooberman, B.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L. [Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

    2011-02-01

    We report on analyses of tau lepton decays {tau}{sup -}{yields}{eta}K{sup -}{nu}{sub {tau}} and {tau}{sup -}{yields}{eta}{pi}{sup -}{nu}{sub {tau}}, with {eta}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}, using 470 fb{sup -1} of data from the BABAR experiment at PEP-II, collected at center-of-mass energies at and near the {Upsilon}(4S) resonance. We measure the branching fraction for the {tau}{sup -}{yields}{eta}K{sup -}{nu}{sub {tau}} decay mode, B({tau}{sup -}{yields}{eta}K{sup -}{nu}{sub {tau}})=(1.42{+-}0.11(stat){+-}0.07(syst))x10{sup -4}, and report a 95% confidence level upper limit for the second-class current process {tau}{sup -}{yields}{eta}{pi}{sup -}{nu}{sub {tau}}, B({tau}{sup -}{yields}{eta}{pi}{sup -}{nu}{sub {tau}})<9.9x10{sup -5}.

  1. Search for Lepton Flavor Violating Decays tau±-->l±pi0, l±eta, l±eta'

    Microsoft Academic Search

    B. Aubert; M. Bona; D. Boutigny; F. Couderc; Y. Karyotakis; J. P. Lees; V. Poireau; V. Tisserand; A. Zghiche; E. Grauges; A. Palano; J. C. Chen; N. D. Qi; G. Rong; P. Wang; Y. S. Zhu; G. Eigen; I. Ofte; B. Stugu; G. S. Abrams; M. Battaglia; D. N. Brown; J. Button-Shafer; R. N. Cahn; E. Charles; M. S. Gill; Y. Groysman; R. G. Jacobsen; J. A. Kadyk; L. T. Kerth; Yu. G. Kolomensky; G. Kukartsev; D. Lopes Pegna; G. Lynch; L. M. Mir; T. J. Orimoto; M. Pripstein; N. A. Roe; M. T. Ronan; W. A. Wenzel; P. Del Amo Sanchez; M. Barrett; K. E. Ford; T. J. Harrison; A. J. Hart; C. M. Hawkes; A. T. Watson; T. Held; H. Koch; B. Lewandowski; M. Pelizaeus; K. Peters; T. Schroeder; M. Steinke; J. T. Boyd; J. P. Burke; W. N. Cottingham; D. Walker; D. J. Asgeirsson; T. Cuhadar-Donszelmann; B. G. Fulsom; C. Hearty; N. S. Knecht; T. S. Mattison; J. A. McKenna; A. Khan; P. Kyberd; M. Saleem; D. J. Sherwood; L. Teodorescu; V. E. Blinov; A. D. Bukin; V. P. Druzhinin; V. B. Golubev; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; E. P. Solodov; K. Yu. Todyshev; D. S. Best; M. Bondioli; M. Bruinsma; M. Chao; S. Curry; I. Eschrich; D. Kirkby; A. J. Lankford; P. Lund; M. Mandelkern; W. Roethel; D. P. Stoker; S. Abachi; C. Buchanan; S. D. Foulkes; J. W. Gary; O. Long; B. C. Shen; K. Wang; L. Zhang; H. K. Hadavand; E. J. Hill; H. P. Paar; S. Rahatlou; V. Sharma; J. W. Berryhill; C. Campagnari; A. Cunha; B. Dahmes; T. M. Hong; D. Kovalskyi; J. D. Richman; T. W. Beck; A. M. Eisner; C. J. Flacco; C. A. Heusch; J. Kroseberg; W. S. Lockman; G. Nesom; T. Schalk; B. A. Schumm; A. Seiden; P. Spradlin; D. C. Williams; M. G. Wilson; J. Albert; E. Chen; C. H. Cheng; A. Dvoretskii; F. Fang; D. G. Hitlin; I. Narsky; T. Piatenko; F. C. Porter; G. Mancinelli; B. T. Meadows; K. Mishra; M. D. Sokoloff; F. Blanc; P. C. Bloom; S. Chen; W. T. Ford; J. F. Hirschauer; A. Kreisel; M. Nagel; U. Nauenberg; A. Olivas; W. O. Ruddick; J. G. Smith; K. A. Ulmer; S. R. Wagner; J. Zhang; A. Chen; E. A. Eckhart; A. Soffer; W. H. Toki; R. J. Wilson; F. Winklmeier; Q. Zeng; D. D. Altenburg; E. Feltresi; A. Hauke; H. Jasper; J. Merkel; A. Petzold; B. Spaan; T. Brandt; V. Klose; H. M. Lacker; W. F. Mader; R. Nogowski; J. Schubert; K. R. Schubert; R. Schwierz; J. E. Sundermann; A. Volk; D. Bernard; G. R. Bonneaud; E. Latour; Ch. Thiebaux; M. Verderi; P. J. Clark; W. Gradl; F. Muheim; S. Playfer; A. I. Robertson; Y. Xie; M. Andreotti; D. Bettoni; C. Bozzi; R. Calabrese; G. Cibinetto; E. Luppi; M. Negrini; A. Petrella; L. Piemontese; E. Prencipe; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; G. Finocchiaro; S. Pacetti; P. Patteri; I. M. Peruzzi; M. Piccolo; M. Rama; A. Zallo; A. Buzzo; R. Contri; M. Lo Vetere; M. M. Macri; M. R. Monge; S. Passaggio; C. Patrignani; E. Robutti; A. Santroni; S. Tosi; G. Brandenburg; K. S. Chaisanguanthum; C. L. Lee; M. Morii; J. Wu; R. S. Dubitzky; J. Marks; S. Schenk; U. Uwer; D. J. Bard; W. Bhimji; D. A. Bowerman; P. D. Dauncey; U. Egede; R. L. Flack; J. A. Nash; M. B. Nikolich; W. Panduro Vazquez; P. K. Behera; X. Chai; M. J. Charles; U. Mallik; N. T. Meyer; V. Ziegler; J. Cochran; H. B. Crawley; L. Dong; V. Eyges; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; A. V. Gritsan; A. G. Denig; M. Fritsch; G. Schott; N. Arnaud; M. Davier; G. Grosdidier; A. Höcker; V. Lepeltier; F. Le Diberder; A. M. Lutz; A. Oyanguren; S. Pruvot; S. Rodier; P. Roudeau; M. H. Schune; J. Serrano; A. Stocchi; W. F. Wang; G. Wormser; D. J. Lange; D. M. Wright; C. A. Chavez; I. J. Forster; J. R. Fry; E. Gabathuler; R. Gamet; K. A. George; D. E. Hutchcroft; D. J. Payne; K. C. Schofield; C. Touramanis; A. J. Bevan; C. K. Clarke; F. Di Lodovico; W. Menges; R. Sacco; G. Cowan; H. U. Flaecher; D. A. Hopkins; P. D. Jackson; T. R. McMahon; F. Salvatore; A. C. Wren; C. L. Davis; J. Allison; N. R. Barlow; R. J. Barlow; Y. M. Chia; C. L. Edgar; G. D. Lafferty; M. T. Naisbit; J. C. Williams; J. I. Yi; C. Chen; W. D. Hulsbergen; A. Jawahery; C. K. Lae; D. A. Roberts; G. Simi; G. Blaylock; C. Dallapiccola; S. S. Hertzbach; X. Li; T. B. Moore; S. Saremi; H. Staengle; R. Cowan; G. Sciolla; S. J. Sekula; M. Spitznagel; F. Taylor; R. K. Yamamoto; H. Kim; S. E. McLachlin; P. M. Patel; S. H. Robertson; A. Lazzaro; V. Lombardo; F. Palombo; J. M. Bauer; L. Cremaldi; V. Eschenburg; R. Godang; R. Kroeger; D. A. Sanders; D. J. Summers; H. W. Zhao; S. Brunet; D. Côté; M. Simard; P. Taras; F. B. Viaud; H. Nicholson; N. Cavallo; G. De Nardo; F. Fabozzi; C. Gatto; L. Lista; D. Monorchio; P. Paolucci; D. Piccolo; C. Sciacca; M. A. Baak; G. Raven; H. L. Snoek; C. P. Jessop; J. M. Losecco; G. Benelli; L. A. Corwin; K. K. Gan; K. Honscheid; D. Hufnagel; H. Kagan; R. Kass; A. M. Rahimi; J. J. Regensburger; R. Ter-Antonyan; Q. K. Wong; N. L. Blount; J. Brau; R. Frey; O. Igonkina; J. A. Kolb; M. Lu; C. T. Potter; R. Rahmat

    2007-01-01

    A search for lepton flavor violating decays of the tau lepton to a lighter mass lepton and a pseudoscalar meson has been performed using 339fb-1 of e+e- annihilation data collected at a center-of-mass energy near 10.58 GeV by the BABAR detector at the SLAC PEP-II storage ring. No evidence of a signal has been found, and upper limits on the

  2. Measurement of the Tau Lepton Polarisation at LEP2

    E-print Network

    Abdallah, J; Adam, W; Adzic, P; Albrecht, T; Alemany-Fernandez, R; Allmendinger, T; Allport, P P; Amaldi, Ugo; Amapane, N; Amato, S; Anashkin, E; Andreazza, A; Andringa, S; Anjos, N; Antilogus, P; Apel, W D; Arnoud, Y; Ask, S; Åsman, B; Augustin, J E; Augustinus, A; Baillon, P; Ballestrero, A; Bambade, P; Barbier, R; Bardin, D; Barker, G J; Baroncelli, A; Battaglia, M; Baubillier, M; Becks, K H; Begalli, M; Behrmann, A; Ben-Haim, E; Benekos, N; Benvenuti, A; Bérat, C; Berggren, M; Bertrand, D; Besançon, M; Besson, N; Bloch, D; Blom, M; Bluj, M; Bonesini, M; Boonekamp, M; Booth, P S L; Borisov, G; Botner, O; Bouquet, B; Bowcock, T J V; Boyko, I; Bracko, M; Brenner, R; Brodet, E; Brückman, P; Brunet, J M; Buschbeck, B; Buschmann, P; Calvi, M; Camporesi, T; Canale, V; Carena, F; Castro, N; Cavallo, F; Chapkin, M; Charpentier, P; Checchia, P; Chierici, R; Shlyapnikov, P; Chudoba, J; Chung, S U; Cieslik, K; Collins, P; Contri, R; Cosme, G; Cossutti, F; Costa, M J; Crennell, D J; Cuevas-Maestro, J; D'Hondt, J; Da Silva, T; Da Silva, W; Dedovich, D; Della Ricca, G; De Angelis, A; de Boer, Wim; De Clercq, C; De Lotto, B; De Maria, N; De Min, A; De Paula, L; Di Ciaccio, L; Di Simone, A; Doroba, K; Drees, J; Eigen, G; Ekelöf, T J C; Ellert, M; Elsing, M; Espirito-Santo, M C; Fanourakis, G K; Fassouliotis, D; Feindt, M; Fernández, J; Ferrer, A; Ferro, F; Flagmeyer, U; Föth, H; Fokitis, E; Fulda-Quenzer, F; Fuster, J; Gandelman, M; García, C; Gavillet, P; Gazis, E; Gokieli, R; Golob, B; Gómez-Ceballos, G; Gonçalves, P; Graziani, E; Grosdidier, G; Grzelak, K; Guy, J; Haag, C; Hallgren, A; Hamacher, K; Hamilton, K; Haug, S; Hauler, F; Hedberg, V; Hennecke, M; Herr, H; Hoffman, J; Holmgren, S O; Holt, P J; Houlden, M A; Jackson, J N; Jarlskog, G; Jarry, P; Jeans, D; Johansson, E K; Jonsson, P; Joram, C; Jungermann, L; Kapusta, F; Katsanevas, S; Katsoufis, E; Kernel, G; Kersevan, B P; Kerzel, U; King, B T; Kjaer, N J; Kluit, P; Kokkinias, P; Kourkoumelis, C; Kuznetsov, O; Krumshtein, Z; Kucharczyk, M; Lamsa, J; Leder, G; Ledroit, F; Leinonen, L; Leitner, R; Lemonne, J; Lepeltier, V; Lesiak, T; Liebig, W; Liko, D; Lipniacka, A; Lopes, J H; López, J M; Loukas, D; Lutz, P; Lyons, L; MacNaughton, J; Malek, A; Maltezos, S; Mandl, F; Marco, J; Marco, R; Maréchal, B; Margoni, M; Marin, J C; Mariotti, C; Markou, A; Martínez-Rivero, C; Masik, J; Mastroyiannopoulos, N; Matorras, F; Matteuzzi, C; Mazzucato, F; Mazzucato, M; McNulty, R; Meroni, C; Migliore, E; Mitaroff, W A; Mjörnmark, U; Moa, T; Moch, M; Mönig, K; Monge, R; Montenegro, J; Moraes, D; Moreno, S; Morettini, P; Müller, U; Münich, K; Mulders, M; Mundim, L; Murray, W; Muryn, B; Myatt, G; Myklebust, T; Nassiakou, M; Navarria, F; Nawrocki, K; Nicolaidou, R; Nikolenko, M; Oblakowska-Mucha, A; Obraztsov, V F; Olshevski, A; Onofre, A; Orava, R; Österberg, K; Ouraou, A; Oyanguren, A; Paganoni, M; Paiano, S; Palacios, J P; Palka, H; Papadopoulou, T D; Pape, L; Parkes, C; Parodi, F; Parzefall, U; Passeri, A; Passon, O; Peralta, L; Perepelitsa, V; Perrotta, A; Petrolini, A; Piedra, J; Pieri, L; Pierre, F; Pimenta, M; Piotto, E; Podobnik, T; Poireau, V; Pol, M E; Polok, G; Pozdnyakov, V; Pukhaeva, N; Pullia, A; Rames, J; Read, A; Rebecchi, P; Rehn, J; Reid, D; Reinhardt, R; Renton, P B; Richard, F; Rídky, J; Rivero, M; Rodríguez, D; Romero, A; Ronchese, P; Roudeau, P; Rovelli, T; Ruhlmann-Kleider, V; Ryabtchikov, D; Sadovskii, A; Salmi, L; Salt, J; Sander, C; Savoy-Navarro, A; Schwickerath, U; Sekulin, R; Siebel, M; Sisakian, A; Smadja, G; Smirnova, O; Sokolov, A; Sopczak, A; Sosnowski, R; Spassoff, Tz; Stanitzki, M; Stocchi, A; Strauss, J; Stugu, B; Szczekowski, M; Szeptycka, M; Szumlak, T; Tabarelli de Fatis, T; Tegenfeldt, F; Timmermans, J; Tkatchev, L; Tobin, M; Todorovova, S; Tomé, B; Tonazzo, A; Tortosa, P; Travnicek, P; Treille, D; Tristram, G; Trochimczuk, M; Troncon, C; Turluer, M L; Tyapkin, I A; Tyapkin, P; Tzamarias, S; Uvarov, V; Valenti, G; van Dam, P; Van Eldik, J; Van Remortel, N; Van Vulpen, I; Vegni, G; Veloso, F; Venus, W; Verdier, P; Verzi, V; Vilanova, D; Vitale, L; Vrba, V; Wahlen, H; Washbrook, A J; Weiser, C; Wicke, D; Wickens, J; Wilkinson, G; Winter, M; Witek, M; Yushchenko, O; Zalewska-Bak, A; Zalewski, P; Zavrtanik, D; Zhuravlov, V; Zimin, N I; Zintchenko, A; Zupan, M

    2008-01-01

    A first measurement of the average polarisation P_tau of tau leptons produced in e+e- annihilation at energies significantly above the Z resonance is presented. The polarisation is determined from the kinematic spectra of tau hadronic decays. The measured value P_tau = -0.164 +/- 0.125 is consistent with the Standard Model prediction for the mean LEP energy of 197 GeV.

  3. Tau immunization: a cautionary tale?

    PubMed

    Mably, Alexandra J; Kanmert, Daniel; Mc Donald, Jessica M; Liu, Wen; Caldarone, Barbara J; Lemere, Cynthia A; O'Nuallain, Brian; Kosik, Kenneth S; Walsh, Dominic M

    2015-03-01

    The amyloid ? (A?)-protein and microtubule-associated protein, tau, are the major components of the amyloid plaques and neurofibrillary tangles that typify Alzheimer's disease (AD) pathology. As such both A? and tau have long been proposed as therapeutic targets. Immunotherapy, particularly targeting A?, is currently the most advanced clinical strategy for treating AD. However, several A?-directed clinical trials have failed, and there is concern that targeting this protein may not be useful. In contrast, there is a growing optimism that tau immunotherapy may prove more efficacious. Here, for the first time, we studied the effects of chronic administration of an anti-tau monoclonal antibody (5E2) in amyloid precursor protein transgenic mice. For our animal model, we chose the J20 mouse line because prior studies had shown that the cognitive deficits in these mice require expression of tau. Despite the fact that 5E2 was present and active in the brains of immunized mice and that this antibody appeared to engage with extracellular tau, 5E2-treatment did not recover age-dependent spatial reference memory deficits. These results indicate that the memory impairment evident in J20 mice is unlikely to be mediated by a form of extracellular tau recognized by 5E2. In addition to the lack of positive effect of anti-tau immunotherapy, we also documented a significant increase in mortality among J20 mice that received 5E2. Because both the J20 mice used here and tau transgenic mice used in prior tau immunotherapy trials are imperfect models of AD our results recommend extensive preclinical testing of anti-tau antibody-based therapies using multiple mouse models and a variety of different anti-tau antibodies. PMID:25619661

  4. Tau physics at future facilities

    SciTech Connect

    Perl, M.L.

    1994-12-01

    This paper dicusses and projects the tau research which may be carried out at CESR, at BEPC, at the SLC, in the next few years at LEP I, at the asymmetric B-factories under construction in Japan and the United States and, if built, a tau-charm factory. As the size of tau data sets increases, there is an increasing need to reduce the effects of systematic errors on the precision and search range of experiments. In most areas of tau physics there is a large amount of progress to be made, but in a few areas it will be difficult to substantially improve the precision of present measurements.

  5. A Search for Supersymmetric Higgs Bosons in the Di-tau Decay Mode in Proton - Anti-proton Collisions at 1.8 TeV

    SciTech Connect

    Connolly, Amy Lynn; /UC, Berkeley

    2003-09-01

    A search for directly produced Supersymmetric Higgs Bosons has been performed in the di-tau decay channel in 86.3 {+-} 3.5 pb{sup -1} of data collected by CDF during Run1b at the Tevatron. They search for events where one tau decays to an electron and the other tau decays hadronically. They perform a counting experiment and set limits on the cross section for Higgs production in the high tan {beta} region of the m{sub A}-tan {beta} plane. For a benchmark parameter space point where m{sub A} = 100 and tan {beta} = 50, they set a 95% confidence level upper limit at 891 pb compared to the theoretically predicted cross section of 122 pb. For events where the tau candidates are not back-to-back, they utilize a di-tau mass reconstruction technique for the first time on hadron collider data. Limits based on a likelihood binned in di-tau mass from non-back-to-back events alone are weaker than the limits obtained from the counting experiment using the full di-tau sample.

  6. Electronic branching ratio of the tau lepton

    Microsoft Academic Search

    R. Ammar; P. Baringer; D. Coppage; R. Davis; M. Kelly; N. Kwak; H. Lam; S. Ro; Y. Kubota; M. Lattery; J. K. Nelson; D. Perticone; R. Poling; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; V. Romero; C. R. Sun; P.-N. Wang; M. M. Zoeller; G. Crawford; R. Fulton; K. K. Gan; H. Kagan; R. Kass; J. Lee; R. Malchow; F. Morrow; M. K. Sung; J. Whitmore; P. Wilson; F. Butler; X. Fu; G. Kalbfleisch; M. Lambrecht; P. Skubic; J. Snow; P.-L. Wang; D. Bortoletto; D. N. Brown; J. Dominick; R. L. McIlwain; D. H. Miller; M. Modesitt; E. I. Shibata; S. F. Schaffner; I. P. J. Shipsey; M. Battle; J. Ernst; H. Kroha; S. Roberts; K. Sparks; E. H. Thorndike; C.-H. Wang; R. Stroynowski; M. Artuso; M. Goldberg; T. Haupt; N. Horwitz; R. Kennett; G. C. Moneti; S. Playfer; Y. Rozen; P. Rubin; T. Skwarnicki; S. Stone; M. Thulasidas; W.-M. Yao; G. Zhu; A. V. Barnes; J. Bartelt; S. E. Csorna; V. Jain; T. Letson; M. D. Mestayer; D. S. Akerib; B. Barish; M. Chadha; D. F. Cowen; G. Eigen; J. S. Miller; J. Urheim; A. J. Weinstein; R. J. Morrison; H. Tajima; D. Schmidt; D. Sperka; M. Procario; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; E. Cheu; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; C. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; S. Nandi; C. R. Ng; E. Nordberg; C. O'grady; J. R. Patterson; D. Peterson; D. Riley; M. Sapper; M. Selen; H. Worden; M. Worris; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; J. Yelton; S. Henderson; K. Kinoshita; F. Pipkin; M. Saulnier; R. Wilson; J. Wolinski; D. Xiao; H. Yamamoto; A. J. Sadoff

    1992-01-01

    Using data accumulated by the CLEO I detector operating at the Cornell Electron Storage Ring, we have measured the ratio R=Gamma(tau-->enu¯enutau)\\/Gamma1, where Gamma1 is the tau decay rate to final states with one charged particle. We find R=0.2231+\\/-0.0044+\\/-0.0073 where the first error is statistical and the second is systematic. Together with the measured topological one-charged-particle branching fraction, this yields the

  7. UX Tau A

    NASA Technical Reports Server (NTRS)

    2007-01-01

    This is an artist's rendition of the one-million-year-old star system called UX Tau A, located approximately 450 light-years away. Observations from NASA's Spitzer Space Telescope showed a gap in the dusty planet-forming disk swirling around the system's central sun-like star.

    Spitzer saw a gap in UX Tau A's disk that extends from 0.2 to 56 astronomical units (an astronomical unit is the distance between the sun and Earth). The gap extends from the equivalent of Mercury to Pluto in our solar system, and is sandwiched between thick inner and outer disks on either side. Astronomers suspect that the gap was carved out by one or more forming planets.

    Such dusty disks are where planets are thought to be born. Dust grains clump together like snowballs to form larger rocks, and then the bigger rocks collide to form the cores of planets. When rocks revolve around their central star, they act like cosmic vacuum cleaners, picking up all the gas and dust in their path and creating gaps.

    Although gaps have been detected in disks swirling around young stars before, UX Tau A is special because the gap is sandwiched between two thick disks of dust. An inner thick dusty disk hugs the central star, then, moving outward, there is a gap, followed by another thick doughnut-shaped disk. Other systems with gaps contain very little to no dust near the central star. In other words, those gaps are more like big holes in the centers of disks.

    Some scientists suspect that these holes could have been carved out by a process called photoevaporation. Photoevaporation occurs when radiation from the central star heats up the gas and dust around it to the point where it evaporates away. The fact that there is thick disk swirling extremely close to UX Tau A's central star rules out the photoevaporation scenario. If photoevaporation from the star played a role, then large amounts of dust would not be floating so close to the star.

  8. Search for a Heavy Neutral Particle Decaying to $e\\mu$, $e\\tau$, or $\\mu\\tau$ in $pp$ Collisions at $\\sqrt{s}=8$ TeV with the ATLAS Detector

    E-print Network

    ATLAS Collaboration

    2015-01-01

    This Letter presents a search for a heavy neutral particle decaying into an opposite-sign different-flavor dilepton pair, $e^\\pm \\mu^\\mp$, $e^\\pm \\tau^\\mp$, or $\\mu^\\pm \\tau^\\mp$ using 20.3 fb$^{-1}$ of $pp$ collision data at $\\sqrt{s} = 8$ TeV collected by the ATLAS detector at the LHC. The numbers of observed candidate events are compatible with the Standard Model expectations. Limits are set on the cross section of new phenomena in two scenarios: the production of $\\tilde{\

  9. Modulation of Tau Dysfunction In Vitro

    E-print Network

    Voss, Kellen

    2011-05-31

    mutations on tau can affect the wild-type properties. 1.5 Tau phosphorylation Tau is known to be post-translationally modified by phosphorylation, glycosylation, ubiquitination, oxidation, nitration, glycation and truncation (reviewed in (124...

  10. Observation of B{sup +{yields}}D*{sup 0{tau}+{nu}}{sub {tau}}and evidence for B{sup +{yields}}D{sup 0{tau}+{nu}}{sub {tau}}at Belle

    SciTech Connect

    Bozek, A.; Rozanska, M.; Kapusta, P.; Matyja, A.; Ostrowicz, W.; Stypula, J. [H. Niewodniczanski Institute of Nuclear Physics, Krakow (Poland); Adachi, I.; Higuchi, T.; Iwasaki, Y.; Kichimi, H.; Krokovny, P.; Nakao, M.; Nishida, S.; Nozaki, T.; Sakai, Y.; Schuemann, J.; Trabelsi, K.; Uehara, S.; Uno, S. [High Energy Accelerator Research Organization (KEK), Tsukuba (Japan); Aihara, H. [Department of Physics, University of Tokyo, Tokyo (Japan)

    2010-10-01

    We present measurements of B{sup +{yields}}D*{sup 0{tau}+{nu}}{sub {tau}}and B{sup +{yields}}D{sup 0{tau}+{nu}}{sub {tau}}decays in a data sample of 657x10{sup 6} BB pairs collected with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. We find 446{sub -56}{sup +58} B{sup +{yields}}D*{sup 0{tau}+{nu}}{sub {tau}}events with a significance of 8.1 standard deviations, and 146{sub -41}{sup +42} B{sup +{yields}}D{sup 0{tau}+{nu}}{sub {tau}}events with a significance of 3.5 standard deviations. The latter signal provides the first evidence for this decay mode. The measured branching fractions are B(B{sup +{yields}}D*{sup 0{tau}+{nu}}{sub {tau}})=(2.12{sub -0.27}{sup +0.28}(stat){+-}0.29(syst))% and B(B{sup +{yields}}D{sup 0{tau}+{nu}}{sub {tau}})=(0.77{+-}0.22(stat){+-}0.12(syst))%.

  11. Anesthesia Induces Phosphorylation of Tau

    PubMed Central

    Run, Xiaoqin; Liang, Zhihou; Zhang, Lan; Iqbal, Khalid; Grundke-Iqbal, Inge; Gong, Cheng-Xin

    2010-01-01

    Abnormal hyperphosphorylation and aggregation of microtubule-associated protein tau play a crucial role in neurodegeneration of Alzheimer’s disease (AD). Anesthesia has been associated with cognitive impairment and the risk for AD. Here we investigated the effects of anesthesia on site-specific tau phosphorylation and the possible mechanisms. We found that anesthesia for short periods (30 sec to 5 min) induced tau phosphorylation at Thr181, Ser199, Thr205, Thr212, Ser262, and Ser404 to small, but significant, extents, which appeared to result from anesthesia-induced activation of stress-activated protein kinases. Anesthesia for a longer time (1 h) induced much more dramatic phosphorylation of tau at the above sites, and the further phosphorylation may be associated with hypothermia induced by anesthesia. Anesthesia-induced tau phosphorylation appears to be specific because the increased phosphorylation was only seen at half of the tau phosphorylation sites studied and was not observed in global brain proteins. These studies clarified the dynamic changes of tau phosphorylation at various sites and, thus, served as a fundamental guide for future studies on tau phosphorylation by using brains of anesthetized experimental animals. Our findings also provide a possible mechanism by which anesthesia may cause postoperative cognitive impairment and increase the risk for AD. PMID:19276556

  12. A study of w boson decay charge asymmetry using hadronic tau decays in proton - anti-proton collisions at {radical}s = 1.8 TeV

    SciTech Connect

    E.W Kuns

    2002-10-18

    This dissertation presents a measurement of the tau charge asymmetry in events where the taus are produced by W decays. This charge asymmetry appears as different rapidity distributions for positive and negative taus. Two competing effects generate tau charge asymmetry. The production mechanism for the W gauge boson generates a charge asymmetry which is a function of the ratio of parton distribution functions, d(x)=u(x), measured at x {approx} M{sub W}/{radical}s. This is the dominant effect for tau charge asymmetry at small rapidity. At higher rapidity, however, the competing charge asymmetry from parity violation in W decay to taus becomes dominant. This tau asymmetry measurement is consistent with the Standard Model with a x{sup 2} per degree of freedom equal to 2.5 for 4 degrees of freedom when the asymmetry measurement is folded about y = 0, taking advantage of the CP symmetry of the underlying physics, and 8.9 for 8 degrees of freedom when it is not. This measurement introduces some methods and variables of interest to future analyses using hadronic decay modes of taus. This work was done using the CDF detector in {bar p}p collisions at {radical} = 1.8 TeV at Fermilab's Tevatron accelerator.

  13. Search for Neutral Minimal Supersymmetric Standard Model Higgs Bosons Decaying to Tau Pairs in pp Collisions at sqrt[s]=7??TeV

    SciTech Connect

    Chatrchyan, Serguei; et al.

    2011-06-01

    A search for neutral MSSM Higgs bosons in pp collisions at the LHC at a center-of-mass energy of 7 TeV is presented. The results are based on a data sample corresponding to an integrated luminosity of 36 inverse picobarns recorded by the CMS experiment. The search uses decays of the Higgs bosons to tau pairs. No excess is observed in the tau-pair invariant-mass spectrum. The resulting upper limits on the Higgs boson production cross section times branching fraction to tau pairs, as a function of the pseudoscalar Higgs boson mass, yield stringent new bounds in the MSSM parameter space.

  14. Search for Neutral Minimal Supersymmetric Standard Model Higgs Bosons Decaying to Tau Pairs in pp Collisions at s=7TeV

    NASA Astrophysics Data System (ADS)

    Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Hammer, J.; Hänsel, S.; Hoch, M.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Kasieczka, G.; Kiesenhofer, W.; Krammer, M.; Liko, D.; Mikulec, I.; Pernicka, M.; Rohringer, H.; Schöfbeck, R.; Strauss, J.; Teischinger, F.; Wagner, P.; Waltenberger, W.; Walzel, G.; Widl, E.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Benucci, L.; de Wolf, E. A.; Janssen, X.; Maes, T.; Mucibello, L.; Ochesanu, S.; Roland, B.; Rougny, R.; Selvaggi, M.; van Haevermaet, H.; van Mechelen, P.; van Remortel, N.; Blekman, F.; Blyweert, S.; D'Hondt, J.; Devroede, O.; Gonzalez Suarez, R.; Kalogeropoulos, A.; Maes, J.; Maes, M.; van Doninck, W.; van Mulders, P.; van Onsem, G. P.; Villella, I.; Charaf, O.; Clerbaux, B.; de Lentdecker, G.; Dero, V.; Gay, A. P. R.; Hammad, G. H.; Hreus, T.; Marage, P. E.; Thomas, L.; Vander Velde, C.; Vanlaer, P.; Adler, V.; Cimmino, A.; Costantini, S.; Grunewald, M.; Klein, B.; Lellouch, J.; Marinov, A.; McCartin, J.; Ryckbosch, D.; Thyssen, F.; Tytgat, M.; Vanelderen, L.; Verwilligen, P.; Walsh, S.; Zaganidis, N.; Basegmez, S.; Bruno, G.; Caudron, J.; Ceard, L.; Cortina Gil, E.; de Favereau de Jeneret, J.; Delaere, C.; Favart, D.; Giammanco, A.; Grégoire, G.; Hollar, J.; Lemaitre, V.; Liao, J.; Militaru, O.; Ovyn, S.; Pagano, D.; Pin, A.; Piotrzkowski, K.; Schul, N.; Beliy, N.; Caebergs, T.; Daubie, E.; Alves, G. A.; de Jesus Damiao, D.; Pol, M. E.; Souza, M. H. G.; Carvalho, W.; da Costa, E. M.; de Oliveira Martins, C.; Fonseca de Souza, S.; Mundim, L.; Nogima, H.; Oguri, V.; Prado da Silva, W. L.; Santoro, A.; Silva Do Amaral, S. M.; Sznajder, A.; Torres da Silva de Araujo, F.; Dias, F. A.; Fernandez Perez Tomei, T. R.; Gregores, E. M.; Lagana, C.; Marinho, F.; Mercadante, P. G.; Novaes, S. F.; Padula, Sandra S.; Darmenov, N.; Dimitrov, L.; Genchev, V.; Iaydjiev, P.; Piperov, S.; Rodozov, M.; Stoykova, S.; Sultanov, G.; Tcholakov, V.; Trayanov, R.; Vankov, I.; Dimitrov, A.; Hadjiiska, R.; Karadzhinova, A.; Kozhuharov, V.; Litov, L.; Mateev, M.; Pavlov, B.; Petkov, P.; Bian, J. G.; Chen, G. M.; Chen, H. S.; Jiang, C. H.; Liang, D.; Liang, S.; Meng, X.; Tao, J.; Wang, J.; Wang, J.; Wang, X.; Wang, Z.; Xiao, H.; Xu, M.; Zang, J.; Zhang, Z.; Ban, Y.; Guo, S.; Guo, Y.; Li, W.; Mao, Y.; Qian, S. J.; Teng, H.; Zhang, L.; Zhu, B.; Zou, W.; Cabrera, A.; Gomez Moreno, B.; Ocampo Rios, A. A.; Osorio Oliveros, A. F.; Sanabria, J. C.; Godinovic, N.; Lelas, D.; Lelas, K.; Plestina, R.; Polic, D.; Puljak, I.; Antunovic, Z.; Dzelalija, M.; Brigljevic, V.; Duric, S.; Kadija, K.; Morovic, S.; Attikis, A.; Galanti, M.; Mousa, J.; Nicolaou, C.; Ptochos, F.; Razis, P. A.; Finger, M.; Finger, M., Jr.; Assran, Y.; Khalil, S.; Mahmoud, M. A.; Hektor, A.; Kadastik, M.; Müntel, M.; Raidal, M.; Rebane, L.; Azzolini, V.; Eerola, P.; Fedi, G.; Czellar, S.; Härkönen, J.; Heikkinen, A.; Karimäki, V.; Kinnunen, R.; Kortelainen, M. J.; Lampén, T.; Lassila-Perini, K.; Lehti, S.; Lindén, T.; Luukka, P.; Mäenpää, T.; Tuominen, E.; Tuominiemi, J.; Tuovinen, E.; Ungaro, D.; Wendland, L.; Banzuzi, K.; Korpela, A.; Tuuva, T.; Sillou, D.; Besancon, M.; Choudhury, S.; Dejardin, M.; Denegri, D.; Fabbro, B.; Faure, J. L.; Ferri, F.; Ganjour, S.; Gentit, F. X.; Givernaud, A.; Gras, P.; Hamel de Monchenault, G.; Jarry, P.; Locci, E.; Malcles, J.; Marionneau, M.; Millischer, L.; Rander, J.; Rosowsky, A.; Shreyber, I.; Titov, M.; Verrecchia, P.; Baffioni, S.; Beaudette, F.; Benhabib, L.; Bianchini, L.; Bluj, M.; Broutin, C.; Busson, P.; Charlot, C.; Dahms, T.; Dobrzynski, L.; Elgammal, S.; Granier de Cassagnac, R.; Haguenauer, M.; Miné, P.; Mironov, C.; Ochando, C.; Paganini, P.; Sabes, D.; Salerno, R.; Sirois, Y.; Thiebaux, C.; Wyslouch, B.; Zabi, A.; Agram, J.-L.; Andrea, J.; Bloch, D.; Bodin, D.; Brom, J.-M.; Cardaci, M.; Chabert, E. C.; Collard, C.; Conte, E.; Drouhin, F.; Ferro, C.; Fontaine, J.-C.; Gelé, D.; Goerlach, U.; Greder, S.; Juillot, P.; Karim, M.; Le Bihan, A.-C.; Mikami, Y.; van Hove, P.; Fassi, F.; Mercier, D.; Baty, C.; Beauceron, S.; Beaupere, N.; Bedjidian, M.; Bondu, O.; Boudoul, G.; Boumediene, D.; Brun, H.; Chierici, R.; Contardo, D.; Depasse, P.; El Mamouni, H.; Fay, J.; Gascon, S.; Ille, B.; Kurca, T.; Le Grand, T.; Lethuillier, M.; Mirabito, L.; Perries, S.; Sordini, V.; Tosi, S.; Tschudi, Y.; Verdier, P.; Lomidze, D.; Anagnostou, G.; Edelhoff, M.; Feld, L.; Heracleous, N.; Hindrichs, O.; Jussen, R.; Klein, K.; Merz, J.; Mohr, N.; Ostapchuk, A.; Perieanu, A.; Raupach, F.; Sammet, J.; Schael, S.; Sprenger, D.; Weber, H.; Weber, M.; Wittmer, B.; Ata, M.; Bender, W.; Dietz-Laursonn, E.; Erdmann, M.; Frangenheim, J.; Hebbeker, T.

    2011-06-01

    A search for neutral minimal supersymmetric standard model (MSSM) Higgs bosons in pp collisions at the LHC at a center-of-mass energy of 7 TeV is presented. The results are based on a data sample corresponding to an integrated luminosity of 36pb-1 recorded by the CMS experiment. The search uses decays of the Higgs bosons to tau pairs. No excess is observed in the tau-pair invariant-mass spectrum. The resulting upper limits on the Higgs boson production cross section times branching fraction to tau pairs, as a function of the pseudoscalar Higgs boson mass, yield stringent new bounds in the MSSM parameter space.

  15. Search for Second-Class Currents in tau- -> omega.pi-.nu_tau

    SciTech Connect

    Aubert, B.

    2009-04-22

    We report an analysis of {tau}{sup -} decaying into {omega}{pi}{sup -} {nu}{sub {tau}} with {omega} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0} using a data sample containing nearly 320 million {tau} pairs collected with the BABAR detector at the PEP-II B-Factory. We find no evidence for second-class currents and we set an upper limit of 0.69% at 90% confidence level for the fraction of second-class currents in this decay mode.

  16. Study of Top-Quark Production and Decays involving a Tau Lepton at CDF and Limits on a Charged-Higgs Boson Contribution

    E-print Network

    CDF Collaboration; T. Aaltonen; S. Amerio; D. Amidei; A. Anastassov; A. Annovi; J. Antos; G. Apollinari; J. A. Appel; T. Arisawa; A. Artikov; J. Asaadi; W. Ashmanskas; B. Auerbach; A. Aurisano; F. Azfar; W. Badgett; T. Bae; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; P. Barria; P. Bartos; M. Bauce; F. Bedeschi; S. Behari; G. Bellettini; J. Bellinger; D. Benjamin; A. Beretvas; A. Bhatti; K. R. Bland; B. Blumenfeld; A. Bocci; A. Bodek; D. Bortoletto; J. Boudreau; A. Boveia; L. Brigliadori; C. Bromberg; E. Brucken; J. Budagov; H. S. Budd; K. Burkett; G. Busetto; P. Bussey; P. Butti; A. Buzatu; A. Calamba; S. Camarda; M. Campanelli; F. Canelli; B. Carls; D. Carlsmith; R. Carosi; S. Carrillo; B. Casal; M. Casarsa; A. Castro; P. Catastini; D. Cauz; V. Cavaliere; M. Cavalli-Sforza; A. Cerri; L. Cerrito; Y. C. Chen; M. Chertok; G. Chiarelli; G. Chlachidze; K. Cho; D. Chokheli; A. Clark; C. Clarke; M. E. Convery; J. Conway; M. Corbo; M. Cordelli; C. A. Cox; D. J. Cox; M. Cremonesi; D. Cruz; J. Cuevas; R. Culbertson; N. d'Ascenzo; M. Datta; P. de Barbaro; L. Demortier; L. Marchese; M. Deninno; F. Devoto; M. D'Errico; A. Di Canto; B. Di Ruzza; J. R. Dittmann; M. D'Onofrio; S. Donati; M. Dorigo; A. Driutti; K. Ebina; R. Edgar; A. Elagin; R. Erbacher; S. Errede; B. Esham; S. Farrington; J. P. Fernández Ramos; R. Field; G. Flanagan; R. Forrest; M. Franklin; J. C. Freeman; H. Frisch; Y. Funakoshi; C. Galloni; A. F. Garfinkel; P. Garosi; H. Gerberich; E. Gerchtein; S. Giagu; V. Giakoumopoulou; K. Gibson; C. M. Ginsburg; N. Giokaris; P. Giromini; G. Giurgiu; V. Glagolev; D. Glenzinski; M. Gold; D. Goldin; A. Golossanov; G. Gomez; G. Gomez-Ceballos; M. Goncharov; O. González López; I. Gorelov; A. T. Goshaw; K. Goulianos; E. Gramellini; S. Grinstein; C. Grosso-Pilcher; R. C. Group; J. Guimaraes da Costa; S. R. Hahn; J. Y. Han; F. Happacher; K. Hara; M. Hare; R. F. Harr; T. Harrington-Taber; K. Hatakeyama; C. Hays; J. Heinrich; M. Herndon; A. Hocker; Z. Hong; W. Hopkins; S. Hou; R. E. Hughes; U. Husemann; M. Hussein; J. Huston; G. Introzzi; M. Iori; A. Ivanov; E. James; D. Jang; B. Jayatilaka; E. J. Jeon; S. Jindariani; M. Jones; K. K. Joo; S. Y. Jun; T. R. Junk; M. Kambeitz; T. Kamon; P. E. Karchin; A. Kasmi; Y. Kato; W. Ketchum; J. Keung; B. Kilminster; D. H. Kim; H. S. Kim; J. E. Kim; M. J. Kim; S. B. Kim; S. H. Kim; Y. K. Kim; Y. J. Kim; N. Kimura; M. Kirby; K. Knoepfel; K. Kondo; D. J. Kong; J. Konigsberg; A. V. Kotwal; M. Kreps; J. Kroll; M. Kruse; T. Kuhr; M. Kurata; A. T. Laasanen; S. Lammel; M. Lancaster; K. Lannon; G. Latino; H. S. Lee; J. S. Lee; S. Leo; S. Leone; J. D. Lewis; A. Limosani; E. Lipeles; A. Lister; H. Liu; Q. Liu; T. Liu; S. Lockwitz; A. Loginov; A. Lucà; D. Lucchesi; J. Lueck; P. Lujan; P. Lukens; G. Lungu; J. Lys; R. Lysak; R. Madrak; P. Maestro; S. Malik; G. Manca; A. Manousakis-Katsikakis; F. Margaroli; P. Marino; M. Martínez; K. Matera; M. E. Mattson; A. Mazzacane; P. Mazzanti; R. McNulty; A. Mehta; P. Mehtala; C. Mesropian; T. Miao; D. Mietlicki; A. Mitra; H. Miyake; S. Moed; N. Moggi; C. S. Moon; R. Moore; M. J. Morello; A. Mukherjee; Th. Muller; P. Murat; M. Mussini; J. Nachtman; Y. Nagai; J. Naganoma; I. Nakano; A. Napier; J. Nett; C. Neu; T. Nigmanov; L. Nodulman; S. Y. Noh; O. Norniella; L. Oakes; S. H. Oh; Y. D. Oh; I. Oksuzian; T. Okusawa; R. Orava; L. Ortolan; C. Pagliarone; E. Palencia; P. Palni; V. Papadimitriou; W. Parker; G. Pauletta; M. Paulini; C. Paus; T. J. Phillips; G. Piacentino; E. Pianori; J. Pilot; K. Pitts; C. Plager; L. Pondrom; S. Poprocki; K. Potamianos; F. Prokoshin; A. Pranko; F. Ptohos; G. Punzi; N. Ranjan; I. Redondo Fernández; P. Renton; M. Rescigno; F. Rimondi; L. Ristori; C. Rizzi; A. Robson; T. Rodriguez; S. Rolli; M. Ronzani; R. Roser; J. L. Rosner; F. Ruffini; A. Ruiz; J. Russ; V. Rusu; W. K. Sakumoto; Y. Sakurai; L. Santi; K. Sato; V. Saveliev; A. Savoy-Navarro; P. Schlabach; E. E. Schmidt; T. Schwarz; L. Scodellaro; F. Scuri; S. Seidel; Y. Seiya; A. Semenov; F. Sforza; S. Z. Shalhout; T. Shears; P. F. Shepard; M. Shimojima; M. Shochet; I. Shreyber-Tecker; A. Simonenko; K. Sliwa; J. R. Smith; F. D. Snider; V. Sorin; H. Song; M. Stancari; R. St. Denis; D. Stentz; J. Strologas; Y. Sudo; A. Sukhanov; I. Suslov; K. Takemasa; Y. Takeuchi; J. Tang; M. Tecchio; P. K. Teng; J. Thom; E. Thomson; V. Thukral; D. Toback; S. Tokar; K. Tollefson; T. Tomura; D. Tonelli; S. Torre; D. Torretta; P. Totaro; M. Trovato; F. Ukegawa; S. Uozumi; F. Vázquez; G. Velev; C. Vellidis; C. Vernieri; M. Vidal; R. Vilar; J. Vizán; M. Vogel; G. Volpi; P. Wagner; R. Wallny; S. M. Wang; D. Waters; W. C. Wester III; D. Whiteson; A. B. Wicklund; S. Wilbur; H. H. Williams; J. S. Wilson; P. Wilson; B. L. Winer; P. Wittich; S. Wolbers; H. Wolfe; T. Wright; X. Wu; Z. Wu; K. Yamamoto; D. Yamato; T. Yang; U. K. Yang; Y. C. Yang; W. -M. Yao; G. P. Yeh; K. Yi; J. Yoh; K. Yorita; T. Yoshida

    2014-04-22

    We present an analysis of top-antitop quark production and decay into a tau lepton, tau neutrino, and bottom quark using data from $9 {\\rm fb}^{-1}$ of integrated luminosity at the Collider Detector at Fermilab. Dilepton events, where one lepton is an energetic electron or muon and the other a hadronically-decaying tau lepton, originating from proton-antiproton collisions at $\\sqrt{s} = 1.96 TeV$ are used. A top-antitop quark production cross section of $8.1 \\pm 2.1 {\\rm pb}$ is measured, assuming standard-model top-quark decays. By separately identifying for the first time the single-tau and the ditau components, we measure the branching fraction of the top quark into tau lepton, tau neutrino, and bottom quark to be $(9.6 \\pm 2.8) %$. The branching fraction of top-quark decays into a charged Higgs boson and a bottom quark, which would imply violation of lepton universality, is limited to be less than $5.9%$ at $95%$ confidence level.

  17. Test of the exponential decay law at short decay times using tau leptons

    Microsoft Academic Search

    Gideon Alexander; J. Allison; N. Altekamp; K A Ametewee; K. J. Anderson; S. Anderson; S. Arcelli; D A Axen; Georges Azuelos; A. H. Ball; E. Barberio; R. J. Barlow; R. Bartoldus; J Richard Batley; G. Beaudoin; J. Bechtluft; G. A. Beck; C. Beeston; T. Behnke; A. N. Bell; K. W. Bell; G. Bella; Stanislaus Cornelius Maria Bentvelsen; P. Berlich; Siegfried Bethke; O. Biebel; Ian J Bloodworth; J. E. Bloomer; P. Bock; H. M. Bosch; M. Boutemeur; B. T. Bouwens; S. Braibant; P G Bright-Thomas; R. M. Brown; Helfried J Burckhart; C. Burgard; R. Bürgin; P. Capiluppi; R. K. Carnegie; A. A. Carter; J. R. Carter; C. Chang Y; C. Charlesworth; D. G. Charlton; D. Chrisman; S. L. Chu; P. E. L. Clarke; S. G. Clowes; I. Cohen; J. E. Conboy; O. C. Cooke; M. Cuffiani; S. Dado; C. Dallapiccola; G. M. Dallavalle; C L Darling; S. De Jong; L. A. del Pozo; M. S. Dixit; E. do Couto e Silva; E. Duchovni; G. Duckeck; I. P. Duerdoth; U. C. Dunwoody; J. E. G. Edwards; P. G. Estabrooks; H. G. Evans; Franco Luigi Fabbri; B. Fabbro; P. Fath; F. Fiedler; M. Fierro; Margret Fincke-Keeler; H. M. Fischer; R. Folman; D. G. Fong; M. Foucher; H. Fukui; A. Fürtjes; P. Gagnon; A. Gaidot; J. W. Gary; J. Gascon; S. M. Gascon-Shotkin; N. I. Geddes; C. Geich-Gimbel; S. W. Gensler; F. X. Gentit; T. Geralis; G. Giacomelli; P. Giacomelli; R. Giacomelli; V. Gibson; W. R. Gibson; D. M. Gingrich; J. Goldberg; M. J. Goodrick; W. Gorn; C. Grandi; E. Gross; C. Hajdu; G. G. Hanson; M. Hansroul; M. Hapke; C. K. Hargrove; P. A. Hart; C. Hartmann; M. Hauschild; C. M. Hawkes; R. Hawkings; Richard J Hemingway; G. Herten; R. D. Heuer; M. D. Hildreth; J. C. Hill; S. J. Hillier; T. Hilse; P. R. Hobson; D. Hochman; R James Homer; A. K. Honma; D. Horváth; R. Howard; R. E. Hughes-Jones; D. E. Hutchcroft; P. Igo-Kemenes; D. C. Imrie; A. Jawahery; P. W. Jeffreys; H. Jeremie; Martin Paul Jimack; A. Joly; M. Jones; R. W. L. Jones; U. Jost; P. Jovanovic; D A Karlen; T. Kawamoto; Richard K Keeler; R. G. Kellogg; B. W. Kennedy; B. J. King; J. King; J. Kirk; S. Kluth; T. Kobayashi; M. Kobel; D. S. Koetke; T. P. Kokott; S. Komamiya; R V Kowalewski; T. Kress; P. Krieger; J. von Krogh; P. Kyberd; G. D. Lafferty; H. Lafoux; R. Lahmann; W. P. Lai; D. Lanske; J. Lauber; J. G. Layter; A. M. Lee; E. Lefebvre; Daniel Lellouch; J. Letts; L. Levinson; C. Lewis; S. L. Lloyd; F. K. Loebinger; G. D. Long; B. Lorazo; Michael J Losty; J. Ludwig; A. Luig; A. Malik; M. Mannelli; S. Marcellini; C. Markus; A. J. Martin; J. P. Martin; G. Martinez; T. Mashimo; W. Matthews; P. Mättig; W. J. McDonald; J A McKenna; E. A. Mckigney; T. J. McMahon; A. I. McNab; F. Meijers; S. Menke; F. S. Merritt; H. Mes; J. Meyer; Aldo Michelini; G. Mikenberg; D. J. Miller; R. Mir; W. Mohr; A. Montanari; T. Mori; M. Morii; U. Müller; B. Nellen; B. Nijjhar; R. Nisius; S. W. O'Neale; F. G. Oakham; F. Odorici; H. O. Ogren; N. J. Oldershaw; T. Omori; C. J. Oram; M. J. Oreglia; S. Orito; M. Palazzo; J. Pálinkás; F. M. Palmonari; J. P. Pansart; G. Pásztor; J. R. Pater; G. N. Patrick; M. J. Pearce; P. D. Phillips; J. E. Pilcher; J L Pinfold; D. E. Plane; P R Poffenberger; B. Poli; A. Posthaus; T. W. Pritchard; H. Przysiezniak; D. L. Rees; D. Rigby; M. G. Rison; S. A. Robins; N L Rodning; J. M. Roney; E. Ros; A. M. Rossi; M. Rosvick; P. Routenburg; Y. Rozen; K. Runge; O. Runolfsson; D. R. Rust; R. Rylko; E Sarkisyan-Grinbaum; M. Sasaki; C. Sbarra; A. D. Schaile; O. Schaile; F. Scharf; P. Scharff-Hansen; P. Schenk; B. Schmitt; M. Schröder; H. C. Schultz-Coulon; M. Schulz; P. Schütz; J. Schwiening; W. G. Scott; T. G. Shears; B. C. Shen; C. H. Shepherd-Themistocleous; P. Sherwood; G. P. Siroli; A. Sittler; A. Skillman; A. Skuja; A. M. Smith; T. J. Smith; G. A. Snow; Randall J Sobie; S. Söldner-Rembold; R. W. Springer; M. Sproston; A. Stahl; M. Starks; C. Stegmann; K. Stephens; J. Steuerer; B. Stockhausen; D. Strom; F. Strumia; P. Szymanski; R. Tafirout; H. Takeda; P. Taras; S. Tarem; M. Tecchio; N. Tesch; M. A. Thomson; E. von Törne; S. Towers; M. Tscheulin; T. Tsukamoto; E. Tsur; A. S. Turcot; M. F. Turner-Watson; P. Utzat; R. Van Kooten; G. Vasseur; P. Vikas; M G Vincter; E. H. Vokurka; F. Wäckerle; A. Wagner; D. L. Wagner; C. P. Ward; D. R. Ward; J. J. Ward; P. M. Watkins; A. T. Watson; N. K. Watson; P. Weber; P. S. Wells; N. Wermes; B. Wilkens; G. W. Wilson; J. A. Wilson; T. Wlodek; G. Wolf; S A Wotton; T. R. Wyatt; S M Xella; S. Yamashita; G. Yekutieli; V. Zacek

    1996-01-01

    Quantum mechanics predicts an exponential distribution for the decay time of massive particles. However, deviations are expected for decay times shorter than about 10?13 s in models conjecturing the existence of hidden variables. Following a recent proposal, the decay length distribution of 5843 ? leptons decaying into 3 charged particles was analyzed in search of such a deviation. The deviation

  18. Measurement of the Z to tau tau cross section with the ATLAS detector

    E-print Network

    ATLAS Collaboration

    2011-12-28

    The Z to tau tau cross section is measured with the ATLAS experiment at the LHC in four different final states determined by the decay modes of the tau leptons: muon-hadron, electron-hadron, electron-muon, and muon-muon. The analysis is based on a data sample corresponding to an integrated luminosity of 36 pb^-1, at a proton-proton center-of-mass energy of sqrt(s) = 7 TeV. Cross sections are measured separately for each final state in fiducial regions of high detector acceptance, as well as in the full phase space, over the mass region 66 - 116 GeV. The individual cross sections are combined and the product of the total Z production cross section and Z to tau tau branching fraction is measured to be 0.97 +/- 0.07(stat) +/- 0.06(syst) +/- 0.03(lumi), in agreement with NNLO calculations.

  19. Reconstruction of tau leptons and prospects for SUSY in ATLAS

    SciTech Connect

    Zendler, Carolin [Physikalisches Institut, University of Bonn, Nussallee 12, 53115 Bonn (Germany)

    2010-02-10

    Final states with tau leptons may play a special role among the broad variety of signatures for the production of supersymmetric particles at the LHC. The algorithms for tau reconstruction and identification are discussed, which are essential ingredients to reject the huge background from QCD processes. The status of analyses of SUSY tau lepton final states within the ATLAS experiment at the LHC are presented, which range from a study of semi-inclusive discovery prospects to more exclusive processes with two tau leptons from chi-tilde{sub 2}{sup 0} decays and their implications for the determination of SUSY parameters. Also, the prospects for exploiting tau lepton polarization are discussed.

  20. The Tau-Charm Factory and tau physics

    SciTech Connect

    Perl, M.L.

    1989-04-01

    An international group of physicists is developing the concept and design of a Tau-Charm Factory: a two-ring, electron-positron, circular collider with 1.5 /< =/ /radical/s /< =/ 4.2 GeV and a design luminosity of 10/sup 33/ cm/sup /minus/2/ s/sup /minus/1/. This paper presents the concept of the facility and outlines the tau lepton physics which can be done. A companion talk by R. Schindler discusses the D/sup 0/, D/sup /+-//, and D/sub s/ physics at a Tau-Charm Factory. 25 refs., 2 tabs.

  1. Search for anomalous weak dipole moments of the $\\tau$ lepton

    E-print Network

    Heister, A; Barate, R; De Bonis, I; Décamp, D; Goy, C; Lees, J P; Merle, E; Minard, M N; Pietrzyk, B; Bravo, S; Casado, M P; Chmeissani, M; Crespo, J M; Fernández, E; Fernández-Bosman, M; Garrido, L; Martínez, M; Pacheco, A; Ruiz, H; Colaleo, A; Creanza, D; De Palma, M; Iaselli, Giuseppe; Maggi, G; Maggi, M; Nuzzo, S; Ranieri, A; Raso, G; Ruggieri, F; Selvaggi, G; Silvestris, L; Tempesta, P; Tricomi, A; Zito, G; Huang, X; Lin, J; Ouyang, Q; Wang, T; Xie, Y; Xu, R; Xue, S; Zhang, J; Zhang, L; Zhao, W; Abbaneo, D; Azzurri, P; Buchmüller, O L; Cattaneo, M; Cerutti, F; Clerbaux, B; Drevermann, H; Forty, R W; Frank, M; Gianotti, F; Hansen, J B; Harvey, J; Hutchcroft, D E; Janot, P; Jost, B; Kado, M; Mato, P; Moutoussi, A; Ranjard, F; Rolandi, Luigi; Schlatter, W D; Schneider, O; Sguazzoni, G; Tejessy, W; Teubert, F; Valassi, Andrea; Videau, I; Ward, J; Badaud, F; Falvard, A; Gay, P; Henrard, P; Jousset, J; Michel, B; Monteil, S; Montret, J C; Pallin, D; Perret, P; Hansen, J D; Hansen, J R; Hansen, P H; Nilsson, B S; Kyriakis, A; Markou, C; Simopoulou, Errietta; Vayaki, Anna; Zachariadou, K; Blondel, A; Bonneaud, G R; Brient, J C; Rougé, A; Rumpf, M; Swynghedauw, M; Verderi, M; Videau, H L; Ciulli, V; Focardi, E; Parrini, G; Antonelli, A; Antonelli, M; Bencivenni, G; Bossi, F; Capon, G; Chiarella, V; Laurelli, P; Mannocchi, G; Murtas, G P; Passalacqua, L; Pepé-Altarelli, M; Lynch, J G; Negus, P; O'Shea, V; Raine, C; Thompson, A S; Wasserbaech, S R; Cavanaugh, R J; Geweniger, C; Hanke, P; Hepp, V; Kluge, E E; Putzer, A; Stenzel, H; Tittel, K; Wunsch, M; Beuselinck, R; Binnie, David M; Cameron, W; Dornan, P J; Girone, M; Marinelli, N; Sedgbeer, J K; Thompson, J C; Ghete, V M; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Bouhova-Thacker, E; Bowdery, C K; Finch, A J; Foster, F; Hughes, G; Jones, R W L; Pearson, M R; Robertson, N A; Jakobs, K; Kleinknecht, K; Renk, B; Sander, H G; Wachsmuth, H W; Zeitnitz, C; Bonissent, A; Coyle, P; Leroy, O; Payre, P; Rousseau, D; Talby, M; Ragusa, F; David, A; Dietl, H; Ganis, G; Hüttmann, K; Lütjens, G; Männer, W; Moser, H G; Settles, Ronald; Wolf, G; Boucrot, J; Callot, O; Davier, M; Duflot, L; Grivaz, J F; Heusse, P; Jacholkowska, A; Lefrançois, J; Veillet, J J; Yuan, C; Bagliesi, G; Boccali, T; Foà, L; Giammanco, A; Giassi, A; Ligabue, F; Messineo, A; Palla, Fabrizio; Sanguinetti, G; Sciabà, A; Tenchini, Roberto; Venturi, A; Verdini, P G; Blair, G A; Cowan, G; Green, M G; Medcalf, T; Misiejuk, A; Strong, J A; Teixeira-Dias, P; Clifft, R W; Edgecock, T R; Norton, P R; Tomalin, I R; Bloch-Devaux, B; Colas, P; Lançon, E; Lemaire, M C; Locci, E; Pérez, P; Rander, J; Schuller, J P; Vallage, B; Konstantinidis, N P; Litke, A M; Taylor, G; Booth, C N; Cartwright, S L; Combley, F; Lehto, M H; Thompson, L F; Böhrer, A; Brandt, S; Grupen, Claus; Ngac, A; Prange, G; Giannini, G; Rothberg, J E; Armstrong, S R; Berkelman, K; Cranmer, K; Ferguson, D P S; Gao, Y; Gonzáles, S; Hayes, O J; Hu, H; Jin, S; Kile, J; McNamara, P A; Nielsen, J; Pan, Y B; Von Wimmersperg-Töller, J H; Wiedenmann, W; Wu, J; Wu Sau Lan; Wu, X; Zobernig, G; Dissertori, G

    2003-01-01

    The anomalous weak dipole moments of the $\\tau$ lepton are measured in a data sample collected by ALEPH from 1990 to 1995 corresponding to an integrated luminosity of 155~pb$^{-1}$. Tau leptons produced in the reaction $e^+ e^- \\rightarrow \\tau^+ \\tau^-$ at energies close to the ${\\rm Z}$ mass are studied using their semileptonic decays to $\\pi$, $\\rho$, $a_1 \\rightarrow \\pi 2\\pi^0$ or $a_1 \\rightarrow 3 \\pi$. The real and imaginary components of both the anomalous weak magnetic dipole moment and the CP-violating anomalous weak electric dipole moment, $ {\\rm Re}\\,\\mu_{\\tau}$, ${\\rm Im}\\,\\mu_{\\tau}$, ${\\rm Re}\\,d_{\\tau}$ and ${\\rm Im}\\,d_{\\tau}$, are measured simultaneously by means of a likelihood fit built from the full differential cross section. No evidence of new physics is found. The following bounds are obtained (95\\% CL): $|{\\rm Re}\\, \\mu_{\\tau} | < 1.14 \\times 10^{-3}$, $|{\\rm Im}\\, \\mu_{\\tau} | < 2.65 \\times 10^{-3}$, $|{\\rm Re}\\, d_{\\tau} | < 0.91 \\times 10^{-3}$, and $|{\\rm Im}\\, d_{\\tau} ...

  2. The acetylation of tau inhibits its function and promotes pathological tau aggregation

    Microsoft Academic Search

    Todd J. Cohen; Jing L. Guo; David E. Hurtado; Linda K. Kwong; Ian P. Mills; John Q. Trojanowski; Virginia M. Y. Lee

    2011-01-01

    The microtubule associated protein tau promotes neuronal survival through binding and stabilization of MTs. Phosphorylation regulates tau–microtubule interactions and hyperphosphorylation contributes to the aberrant formation of insoluble tau aggregates in Alzheimer's disease (AD) and related tauopathies. However, other pathogenic post-translational tau modifications have not been well characterized. Here we demonstrate that tau acetylation inhibits tau function via impaired tau–microtubule interactions

  3. Tau exon 10 alternative splicing and tauopathies

    PubMed Central

    Liu, Fei; Gong, Cheng-Xin

    2008-01-01

    Abnormalities of microtubule-associated protein tau play a central role in neurofibrillary degeneration in several neurodegenerative disorders that collectively called tauopathies. Six isoforms of tau are expressed in adult human brain, which result from alternative splicing of pre-mRNA generated from a single tau gene. Alternative splicing of tau exon 10 results in tau isoforms containing either three or four microtubule-binding repeats (3R-tau and 4R-tau, respectively). Approximately equal levels of 3R-tau and 4R-tau are expressed in normal adult human brain, but the 3R-tau/4R-tau ratio is altered in the brains in several tauopathies. Discovery of silence mutations and intronic mutations of tau gene in some individuals with frontotemporal dementia with Parkinsonism linked to chromosome 17 (FTDP-17), which only disrupt tau exon 10 splicing but do not alter tau's primary sequence, demonstrates that dysregulation of tau exon 10 alternative splicing and consequently of 3R-tau/4R-tau balance is sufficient to cause neurodegeneration and dementia. Here, we review the gene structure, transcripts and protein isoforms of tau, followed by the regulation of exon 10 splicing that determines the expression of 3R-tau or 4R-tau. Finally, dysregulation of exon 10 splicing of tau in several tauopathies is discussed. Understanding the molecular mechanisms by which tau exon 10 splicing is regulated and how it is disrupted in tauopathies will provide new insight into the mechanisms of these tauopathies and help identify new therapeutic targets to treat these disorders. PMID:18616804

  4. Using Tau Polarization for Charged Higgs Boson and SUSY Searches at LHC

    E-print Network

    Monoranjan Guchait; D. P. Roy

    2009-11-24

    The $\\tau$ polarization can be easily measured at LHC in the 1-prong hadronic $\\tau$ decay channel by measuring what fraction of the $\\tau$-jet momentum is carried by the charged track. A simple cut requiring this fraction to be >0.8 retains most of the polarization of $\\tau=$+1 $\\tau$-jet signal while suppressing the polarization of $\\tau=$-1 $\\tau$-jet background and practically eliminating the fake $\\tau$ background. This can be utilized to extract the charged Higgs signal. It can be also utilized to extract the SUSY signal in the stau NLSP region, and in particular the stau co-annihilaton region.

  5. Measurements of the {tau} mass and the mass difference of the {tau}{sup +} and {tau}{sup -} at BABAR

    SciTech Connect

    Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V. [Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France); Garra Tico, J.; Grauges, E. [Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain); Martinelli, M.; Palano, A.; Pappagallo, M. [INFN Sezione di Bari I-70126, Bari (Italy); Dipartimento di Fisica, Universita di Bari, I-70126 Bari (Italy); Eigen, G.; Stugu, B.; Sun, L. [University of Bergen, Institute of Physics, N-5007 Bergen (Norway); Battaglia, M.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G. [Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)] (and others)

    2009-11-01

    We present the result from a precision measurement of the mass of the {tau} lepton, M{sub {tau}}, based on 423 fb{sup -1} of data recorded at the {upsilon}(4S) resonance with the BABAR detector. Using a pseudomass endpoint method, we determine the mass to be 1776.68{+-}0.12(stat){+-}0.41(syst) MeV. We also measure the mass difference between the {tau}{sup +} and {tau}{sup -}, and obtain (M{sub {tau}{sup +}}-M{sub {tau}{sup -}})/M{sub AVG}{sup {tau}}=(-3.4{+-}1.3(stat){+-}0.3(syst))x10{sup -4}, where M{sub AVG}{sup {tau}} is the average value of M{sub {tau}{sup +}} and M{sub {tau}{sup -}}.

  6. Photometric and spectroscopic monitoring of AA Tau, DN Tau, UX Tau A, T Tau, RY Tau, Lk Ca 4, and Lk Ca 7

    NASA Technical Reports Server (NTRS)

    Vrba, F. J.; Chugainov, P. F.; Weaver, W. B.; Stauffer, J. S.

    1993-01-01

    We report the results of a UBVRI photometric monitoring campaign for three classical T Tauri stars (AA Tau, DN Tau, and UX Tau A) and two weak emission line T Tauri stars (Lk Ca 4 and Lk Ca 7). Observations were obtained at three sites during a core observing period spanning UT 1985 October 14 through UT 1985 December 25, with additional observations continuing until UT 1986 April 6. Concurrent spectrophotometric observations were obtained for all main program stars except Lk Ca 7 and additionally for T Tau, RW Aur, and RY Tau. Periodic photometric variability, assumed to be the stars' rotation periods, were found for AA Tau, DN Tau, Lk Ca 4, and Lk Ca 7, respectively, as 8.2, 6.3, 3.4, and 5.7 days. Several U-filter flares were observed for Lk Ca 4 and Lk Ca 7, which are strongly concentrated toward phases of minimum light. Correlations are found between H-alpha line strengths and V magnitudes for AA Tau and RY Tau. An analysis of absolute color variations of classical T Tauri stars confirms that hot spots are the predominant cause of these stars' variability. Our overall results are consistent with earlier findings that long-lived cool spots are responsible for most of the variability found for weak-emission T Tauri stars, while temporal hot spots are primarily responsible for the observed variability found in classical T Tauri stars.

  7. Tau Lepton Flavor Violation Results from BABAR

    SciTech Connect

    Cervelli, A. [INFN Sez. Pisa, Largo Bruno Pontecorvo 3, 56127 Pisa (Italy)

    2009-12-17

    We report the recent results obtained by BABAR collaboration in lepton flavor violation (LFV) searches in the tau lepton sector, presenting 16 new results from {tau}LLL(L = e,{mu}), {tau}{yields}LV{sup 0}(V{sup 0} = {rho}{sup 0}, K*{sup 0}, K*{sup -0},{phi} and {tau}{yields}LK{sub S}.

  8. Tau protein function in living cells

    Microsoft Academic Search

    David G. Drubin; Marc W. Kirschner

    1986-01-01

    Tau protein from mammalian brain pro- motes microtubule polymerization in vitro and is in- duced during nerve cell differentiation. However, the effects of tau or any other microtubule-associated pro- tein on tubulin assembly within cells are presently un- known. We have tested tau protein activity in vivo by microinjection into a cell type that has no endogenous tau protein. Immunofluorescence

  9. Functional Studies of Alzheimer's Disease Tau Protein

    Microsoft Academic Search

    Qun Lu; John G. Wood

    1993-01-01

    In vitroassays were used to monitor and compare the kinetic behavior of bovine tubulin polymerization enhanced by tau proteins isolated from Alrheimer's disease (AD) and nonde- mented (ND) age-matched control brains. Tau from AD cases induced slower polymerization and a steady state turbidity value approximately 50% of that stimulated by tau from con- trol cases. Tau from the most severe

  10. Pfaffian and determinantal tau functions I

    E-print Network

    J. W. van de Leur; A. Yu. Orlov

    2014-04-24

    Adler, Shiota and van Moerbeke observed that a tau function of the Pfaff lattice is a square root of a tau function of the Toda lattice hierarchy of Ueno and Takasaki. In this paper we give a representation theoretical explanation for this phenomenon. We consider 2-BKP and two-component 2-KP tau functions. We shall show that a square of a BKP tau function is equal to a certain two-component KP tau function and a square of a 2-BKP tau function is equal to a certain two-component 2-KP tau function.

  11. Neural representation of movement tau 

    E-print Network

    Tan, Heng?Ru May

    2008-01-01

    A fundamental aspect of goal?directed behaviour concerns the closure of motion?gaps in a timely fashion. An influential theory about how this can be achieved is provided by the tautheory (Lee, 1998). Tau is defined as ...

  12. Tau Lepton Production in ep Collisions at HERA

    E-print Network

    H1 Collaboration

    2006-04-11

    The production of tau leptons in ep collisions is investigated using data recorded by the H1 detector at HERA in the period 1994-2000. Tau leptons are identified by detecting their decay products, using leptonic and hadronic decay modes. The cross section for the production of tau lepton pairs is measured for the first time at HERA. Furthermore, a search for events with an energetic isolated tau lepton and with large missing transverse momentum is performed. The results are found to be in agreement with the Standard Model predictions.

  13. Search for a Low-Mass Higgs Boson in UPSILON(3S)->gammaA{sup 0}, A{sup 0}->tau{sup +}tau{sup -} at BABAR

    SciTech Connect

    Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V. [Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France); Tico, J. Garra; Grauges, E. [Facultat de Fisica, Departament ECM, Universitat de Barcelona, E-08028 Barcelona (Spain); Martinelli, M.; Palano, A.; Pappagallo, M. [INFN Sezione di Bari, I-70126 Bari (Italy); Dipartimento di Fisica, Universita di Bari, I-70126 Bari (Italy); Eigen, G.; Stugu, B.; Sun, L. [University of Bergen, Institute of Physics, N-5007 Bergen (Norway); Battaglia, M.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G. [Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

    2009-10-30

    We search for a light Higgs boson A{sup 0} in the radiative decay UPSILON(3S)->gammaA{sup 0}, A{sup 0}->tau{sup +}tau{sup -}, tau{sup +}->e{sup +}nu{sub e}nu{sub tau}, or tau{sup +}->mu{sup +}nu{sub mu}nu{sub tau}. The data sample contains 122x10{sup 6} UPSILON(3S) events recorded with the BABAR detector. We find no evidence for a narrow structure in the studied tau{sup +}tau{sup -} invariant mass region of 4.03tau{sup +}}{sub tau{sup -}}<10.10 GeV/c{sup 2}. We exclude at the 90% confidence level (C.L.) a low-mass Higgs boson decaying to tau{sup +}tau{sup -} with a product branching fraction B(UPSILON(3S)->gammaA{sup 0})xB(A{sup 0}->tau{sup +}tau{sup -})>(1.5-16)x10{sup -5} across the m{sub tau}{sup +}{sub tau}{sup -} range. We also set a 90% C.L. upper limit on the tau{sup +}tau{sup -} decay of the eta{sub b} at B(eta{sub b}->tau{sup +}tau{sup -})<8%.

  14. Search for neutral Higgs bosons decaying to tau pairs produced in association with b-quarks at s**(1/2)=1.96 TeV

    SciTech Connect

    Herner, Kenneth Richard; /SUNY, Stony Brook

    2008-12-01

    We report results from a search for neutral Higgs bosons decaying to tau pairs produced in association with a b-quark in 1.6 fb{sup -1} of data taken from June 2006 to March 2008 with the D0 detector at Fermi National Accelerator Laboratory. The final state includes a muon, hadronically decaying tau, and jet identified as coming from a b-quark. We set cross section times branching ratio limits on production of such neutral Higgs bosons {phi} in the mass range from 90 GeV to 160 GeV. Exclusion limits are set at the 95% Confidence Level for several supersymmetric scenarios.

  15. 206,:03-6407229. mail-e:kletenik@post.tau.ac.il.ilsztrumcl@post.tau.ac

    E-print Network

    Rabani, Eran

    21/10/2007 ­206,:03-6407229. mail-e:kletenik@post.tau.ac.il.ilsztrumcl@post.tau.ac 1­ 1 1.." P;21/10/2007 ­206,:03-6407229. mail-e:kletenik@post.tau.ac.il.ilsztrumcl@post.tau.ac ­ 0 + = TP v . PT v : #12;21/10/2007 ­206,:03-6407229. mail-e:kletenik@post.tau.ac.il.ilsztrumcl@post.tau

  16. Insulin dysfunction and Tau pathology

    PubMed Central

    El Khoury, Noura B.; Gratuze, Maud; Papon, Marie-Amélie; Bretteville, Alexis; Planel, Emmanuel

    2013-01-01

    The neuropathological hallmarks of Alzheimer's disease (AD) include senile plaques of ?-amyloid (A?) peptides (a cleavage product of the Amyloid Precursor Protein, or APP) and neurofibrillary tangles (NFT) of hyperphosphorylated Tau protein assembled in paired helical filaments (PHF). NFT pathology is important since it correlates with the degree of cognitive impairment in AD. Only a small proportion of AD is due to genetic variants, whereas the large majority of cases (~99%) is late onset and sporadic in origin. The cause of sporadic AD is likely to be multifactorial, with external factors interacting with biological or genetic susceptibilities to accelerate the manifestation of the disease. Insulin dysfunction, manifested by diabetes mellitus (DM) might be such factor, as there is extensive data from epidemiological studies suggesting that DM is associated with an increased relative risk for AD. Type 1 diabetes (T1DM) and type 2 diabetes (T2DM) are known to affect multiple cognitive functions in patients. In this context, understanding the effects of diabetes on Tau pathogenesis is important since Tau pathology show a strong relationship to dementia in AD, and to memory loss in normal aging and mild cognitive impairment. Here, we reviewed preclinical studies that link insulin dysfunction to Tau protein pathogenesis, one of the major pathological hallmarks of AD. We found more than 30 studies reporting Tau phosphorylation in a mouse or rat model of insulin dysfunction. We also payed attention to potential sources of artifacts, such as hypothermia and anesthesia, that were demonstrated to results in Tau hyperphosphorylation and could major confounding experimental factors. We found that very few studies reported the temperature of the animals, and only a handful did not use anesthesia. Overall, most published studies showed that insulin dysfunction can promote Tau hyperphosphorylation and pathology, both directly and indirectly, through hypothermia. PMID:24574966

  17. Neuronal activity regulates extracellular tau in vivo

    PubMed Central

    Yamada, Kaoru; Holth, Jerrah K.; Liao, Fan; Stewart, Floy R.; Mahan, Thomas E.; Jiang, Hong; Cirrito, John R.; Patel, Tirth K.; Hochgräfe, Katja; Mandelkow, Eva-Maria

    2014-01-01

    Tau is primarily a cytoplasmic protein that stabilizes microtubules. However, it is also found in the extracellular space of the brain at appreciable concentrations. Although its presence there may be relevant to the intercellular spread of tau pathology, the cellular mechanisms regulating tau release into the extracellular space are not well understood. To test this in the context of neuronal networks in vivo, we used in vivo microdialysis. Increasing neuronal activity rapidly increased the steady-state levels of extracellular tau in vivo. Importantly, presynaptic glutamate release is sufficient to drive tau release. Although tau release occurred within hours in response to neuronal activity, the elimination rate of tau from the extracellular compartment and the brain is slow (half-life of ?11 d). The in vivo results provide one mechanism underlying neuronal tau release and may link trans-synaptic spread of tau pathology with synaptic activity itself. PMID:24534188

  18. Tau in Alzheimer Disease and Related Tauopathies

    PubMed Central

    Iqbal, Khalid; Liu, Fei; Gong, Cheng-Xin; Grundke-Iqbal, Inge

    2011-01-01

    Tau is the major microtubule associated protein (MAP) of a mature neuron. The other two neuronal MAPs are MAP1 and MAP2. An established function of MAPs is their interaction with tubulin and promotion of its assembly into microtubules and stabilization of the microtubule network. The microtubule assembly promoting activity of tau, a phosphoprotein, is regulated by its degree of phosphorylation. Normal adult human brain tau contains 2–3 moles phosphate/mole of tau protein. Hyperphosphorylation of tau depresses this biological activity of tau. In Alzheimer disease (AD) brain tau is ?three to four-fold more hyperphosphorylated than the normal adult brain tau and in this hyperphosphorylated state it is polymerized into paired helical filaments ([PHF) admixed with straight filaments (SF) forming neurofibrillary tangles. Tau is transiently hyperphosphorylated during development and during anesthesia and hypothermia but not to the same state as in AD brain. The abnormally hyperphosphorylated tau in AD brain is distinguished from transiently hyperphosphorylated tau by its ability (1) to sequester normal tau, MAP1 and MAP2 and disrupt microtubules, and (2) to self-assemble into PHF/SF. The cytosolic abnormally hyperphosphorylated tau, because of oligomerization, unlike normal tau, is sedimentable and on self-assembly into PHF/SF, loses its ability to sequester normal MAPs. Some of the tau in AD brain is truncated which also promotes its self-assembly. Tau mutations found in frontotemporal dementia apparently promote its abnormal hyperphosphorylation. Thus, the AD abnormally hyperphosphorylated tau (1) is distinguishable from both normal and transiently hyperphosphorylated taus, and (2) is inhibitory when in a cytosolic/oligomeric state but not when it is self-assembled into PHF/SF. Inhibition of abnormal hyperphosphorylation of tau offers a promising therapeutic target for AD and related tauopathies. PMID:20678074

  19. From tangles to tau protein.

    PubMed

    Iqbal, K; Novak, M

    2006-01-01

    Alois Alzheimer couldn't have chosen a name more appropriate than neurofibrillary tangles when one hundred years ago (Alzheimer, 1906) he presented this histopathological hallmark of the progressive dementing disorder, which got named after him as Alzheimer disease. Both, the structure and as well as the molecular composition of neurofibrillary tangles have baffled neuroscientists for many years. It was not till 1963 when with the help of the electron microscope the tangles were found to be made up of paired helical filaments (PHF). It took another 23 years before microtubule associated protein tau was immunohistochemically identified as the part of neurofibrillary tangles (Grundke-lqbal, 1986 a). The same year it was shown that tau protein in Alzheimer disease brain was abnormally hyperphosphorylated (Grundke-Iqbal, 1986 b). In 1988 Michal Novak, Cesar Milstein and Claude Wischik produced monoclonal antibody that was able to recognize then unknown protein in PHF. The antibody (MN423) allowed its isolation and let to full molecular characterization as protein tau. These studies provided molecular proof that tau protein was the major and an integral component of the PHF (Wischik et al, 1988 a, b, Goedert et al, 1988, Novak et al, 1989, 1991). Over the years the significance of tau pathology for the neurodegenerative diseases was discussed and often questioned. However, detailed studies of the maturation and distribution of NFTs, showing correlation with degree of cognitive decline and memory impairment in Alzheimer's disease (Braak and Braak, 1991), together with discovery of tau gene mutations causing fronto-temporal dementia in many families (Hutton et al, 1998) promoted tau as the major pathogenic force in neurodegenerative cascade. Further studies focused on tau dysfunctions revealed truncation and phosphorylation as two major posttranslational modifications responsible for toxic gain of function as an underlying cause of tauopathies including Alzheimer's disease (Alonso et al, 1996, Novak et al, 1989, 1991, 1993, Avila et al, 2006). Recently, in vivo experiments using transgenic expression of conformationally modified truncated tau showed that truncation is able to drive neurofibrillary pathology ofAlzheimer's type (Zilka et al, 2006). Finally, after one hundred years the exact nature of the neurofibrillary tangles and their role in neurodegeneration is beginning to be unraveled. PMID:17262984

  20. Usp14 Deficiency Increases Tau Phosphorylation without Altering Tau Degradation or Causing Tau-Dependent Deficits

    PubMed Central

    Jin, Youngnam N.; Chen, Ping-Chung; Watson, Jennifer A.; Walters, Brandon J.; Phillips, Scott E.; Green, Karen; Schmidt, Robert; Wilson, Julie A.; Johnson, Gail V.; Roberson, Erik D.; Dobrunz, Lynn E.; Wilson, Scott M.

    2012-01-01

    Regulated protein degradation by the proteasome plays an essential role in the enhancement and suppression of signaling pathways in the nervous system. Proteasome-associated factors are pivotal in ensuring appropriate protein degradation, and we have previously demonstrated that alterations in one of these factors, the proteasomal deubiquitinating enzyme ubiquitin-specific protease 14 (Usp14), can lead to proteasome dysfunction and neurological disease. Recent studies in cell culture have shown that Usp14 can also stabilize the expression of over-expressed, disease-associated proteins such as tau and ataxin-3. Using Usp14-deficient axJ mice, we investigated if loss of Usp14 results in decreased levels of endogenous tau and ataxin-3 in the nervous system of mice. Although loss of Usp14 did not alter the overall neuronal levels of tau and ataxin-3, we found increased levels of phosphorylated tau that correlated with the onset of axonal varicosities in the Usp14-deficient mice. These changes in tau phosphorylation were accompanied by increased levels of activated phospho-Akt, phosphorylated MAPKs, and inactivated phospho-GSK3?. However, genetic ablation of tau did not alter any of the neurological deficits in the Usp14-deficient mice, demonstrating that increased levels of phosphorylated tau do not necessarily lead to neurological disease. Due to the widespread activation of intracellular signaling pathways induced by the loss of Usp14, a better understanding of the cellular pathways regulated by the proteasome is required before effective proteasomal-based therapies can be used to treat chronic neurological diseases. PMID:23144711

  1. Searches for the decays B0-->l±tau-\\/+ and B+-->l+nu (l=e, mu) using hadronic tag reconstruction

    Microsoft Academic Search

    B. Aubert; M. Bona; Y. Karyotakis; J. P. Lees; V. Poireau; X. Prudent; V. Tisserand; A. Zghiche; J. Garra Tico; E. Grauges; L. Lopez; A. Palano; M. Pappagallo; G. Eigen; B. Stugu; L. Sun; G. S. Abrams; M. Battaglia; D. N. Brown; J. Button-Shafer; R. N. Cahn; R. G. Jacobsen; J. A. Kadyk; L. T. Kerth; Yu. G. Kolomensky; G. Kukartsev; D. Lopes Pegna; G. Lynch; I. L. Osipenkov; M. T. Ronan; K. Tackmann; T. Tanabe; W. A. Wenzel; P. Del Amo Sanchez; C. M. Hawkes; N. Soni; A. T. Watson; H. Koch; T. Schroeder; D. Walker; D. J. Asgeirsson; T. Cuhadar-Donszelmann; B. G. Fulsom; C. Hearty; T. S. Mattison; J. A. McKenna; M. Barrett; A. Khan; M. Saleem; L. Teodorescu; V. E. Blinov; A. D. Bukin; A. R. Buzykaev; V. P. Druzhinin; V. B. Golubev; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; E. P. Solodov; K. Yu. Todyshev; M. Bondioli; S. Curry; I. Eschrich; D. Kirkby; A. J. Lankford; P. Lund; M. Mandelkern; E. C. Martin; D. P. Stoker; S. Abachi; C. Buchanan; J. W. Gary; F. Liu; O. Long; B. C. Shen; G. M. Vitug; L. Zhang; H. P. Paar; S. Rahatlou; V. Sharma; C. Campagnari; T. M. Hong; D. Kovalskyi; J. D. Richman; T. W. Beck; A. M. Eisner; C. J. Flacco; C. A. Heusch; J. Kroseberg; W. S. Lockman; T. Schalk; B. A. Schumm; A. Seiden; M. G. Wilson; L. O. Winstrom; E. Chen; C. H. Cheng; D. A. Doll; B. Echenard; F. Fang; D. G. Hitlin; I. Narsky; T. Piatenko; F. C. Porter; R. Andreassen; G. Mancinelli; B. T. Meadows; K. Mishra; M. D. Sokoloff; F. Blanc; P. C. Bloom; W. T. Ford; J. F. Hirschauer; A. Kreisel; M. Nagel; U. Nauenberg; A. Olivas; J. G. Smith; K. A. Ulmer; S. R. Wagner; R. Ayad; A. M. Gabareen; A. Soffer; W. H. Toki; R. J. Wilson; D. D. Altenburg; E. Feltresi; A. Hauke; H. Jasper; J. Merkel; A. Petzold; B. Spaan; K. Wacker; V. Klose; M. J. Kobel; H. M. Lacker; W. F. Mader; R. Nogowski; J. Schubert; K. R. Schubert; R. Schwierz; J. E. Sundermann; A. Volk; D. Bernard; G. R. Bonneaud; E. Latour; V. Lombardo; Ch. Thiebaux; M. Verderi; P. J. Clark; W. Gradl; S. Playfer; A. I. Robertson; J. E. Watson; M. Andreotti; D. Bettoni; C. Bozzi; R. Calabrese; A. Cecchi; G. Cibinetto; P. Franchini; E. Luppi; M. Negrini; A. Petrella; L. Piemontese; E. Prencipe; V. Santoro; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; G. Finocchiaro; S. Pacetti; P. Patteri; I. M. Peruzzi; M. Piccolo; M. Rama; A. Zallo; A. Buzzo; R. Contri; M. Lo Vetere; M. M. Macri; M. R. Monge; S. Passaggio; C. Patrignani; E. Robutti; A. Santroni; S. Tosi; K. S. Chaisanguanthum; M. Morii; R. S. Dubitzky; J. Marks; S. Schenk; U. Uwer; D. J. Bard; P. D. Dauncey; J. A. Nash; W. Panduro Vazquez; M. Tibbetts; P. K. Behera; X. Chai; M. J. Charles; U. Mallik; J. Cochran; H. B. Crawley; L. Dong; V. Eyges; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; Y. Y. Gao; A. V. Gritsan; Z. J. Guo; C. K. Lae; A. G. Denig; M. Fritsch; G. Schott; N. Arnaud; J. Béquilleux; A. D'Orazio; M. Davier; J. Firmino da Costa; G. Grosdidier; A. Höcker; V. Lepeltier; F. Le Diberder; A. M. Lutz; S. Pruvot; P. Roudeau; M. H. Schune; J. Serrano; V. Sordini; A. Stocchi; W. F. Wang; G. Wormser; D. J. Lange; D. M. Wright; I. Bingham; J. P. Burke; C. A. Chavez; J. R. Fry; E. Gabathuler; R. Gamet; D. E. Hutchcroft; D. J. Payne; C. Touramanis; A. J. Bevan; K. A. George; F. di Lodovico; R. Sacco; G. Cowan; H. U. Flaecher; D. A. Hopkins; S. Paramesvaran; F. Salvatore; A. C. Wren; C. L. Davis; N. R. Barlow; R. J. Barlow; Y. M. Chia; C. L. Edgar; G. D. Lafferty; T. J. West; J. I. Yi; J. Anderson; C. Chen; A. Jawahery; D. A. Roberts; G. Simi; J. M. Tuggle; C. Dallapiccola; S. S. Hertzbach; X. Li; T. B. Moore; E. Salvati; S. Saremi; R. Cowan; D. Dujmic; P. H. Fisher; K. Koeneke; G. Sciolla; M. Spitznagel; F. Taylor; R. K. Yamamoto; M. Zhao; M. Klemetti; S. E. McLachlin; P. M. Patel; S. H. Robertson; A. Lazzaro; F. Palombo; J. M. Bauer; L. Cremaldi; V. Eschenburg; R. Godang; R. Kroeger; D. A. Sanders; D. J. Summers; H. W. Zhao; S. Brunet; D. Côté; M. Simard; P. Taras; F. B. Viaud; H. Nicholson; G. de Nardo; L. Lista; D. Monorchio; C. Sciacca; M. A. Baak; G. Raven; H. L. Snoek; C. P. Jessop; K. J. Knoepfel; J. M. Losecco; G. Benelli; L. A. Corwin; K. Honscheid; H. Kagan; R. Kass; J. P. Morris; A. M. Rahimi; J. J. Regensburger; S. J. Sekula; Q. K. Wong; N. L. Blount; J. Brau; R. Frey; O. Igonkina; J. A. Kolb; M. Lu; R. Rahmat; N. B. Sinev; D. Strom; J. Strube; E. Torrence; G. Castelli; N. Gagliardi; A. Gaz; M. Margoni; M. Morandin; A. Pompili; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; C. Voci; E. Ben-Haim; H. Briand; G. Calderini; J. Chauveau; P. David; L. Del Buono; Ch. de La Vaissière; O. Hamon; Ph. Leruste; J. Malclès; J. Ocariz; A. Perez; J. Prendki; L. Gladney; M. Biasini; R. Covarelli; E. Manoni; C. Angelini; G. Batignani; S. Bettarini; M. Carpinelli; R. Cenci; A. Cervelli; F. Forti; M. A. Giorgi; A. Lusiani; G. Marchiori

    2008-01-01

    We present searches for the leptonic decays B+-->l+nu and the lepton flavor violating decays B0-->l±tau-\\/+, where l=e, mu, with data collected by the BABAR experiment at SLAC. This search demonstrates a novel technique in which we fully reconstruct the accompanying Bmacr in Upsilon(4S)-->B Bmacr events, and look for a monoenergetic lepton from the signal B decay. The signal yield is

  2. Total tau is increased, but phosphorylated tau not decreased, in cerebrospinal fluid in amyotrophic lateral sclerosis.

    PubMed

    Wilke, Carlo; Deuschle, Christian; Rattay, Tim W; Maetzler, Walter; Synofzik, Matthis

    2015-02-01

    In amyotrophic lateral sclerosis (ALS), objective biomarkers are needed for early diagnosis and progression monitoring. Reduced phosphorylated tau (p-tau) in cerebrospinal fluid (CSF) has recently been proposed to provide such a biomarker in ALS. Here, we aimed to scrutinize this notion, evaluating both p-tau and total tau (t-tau) in CSF of ALS patients and control subjects. CSF p-tau and t-tau levels were measured in 60 consecutive ALS patients and 120 control subjects without neurodegenerative disease, using an established specific enzyme-linked immunosorbent assay method. Contrary to recent reports, CSF p-tau was not significantly reduced in ALS patients compared with control subjects (p = 0.287). However, CSF t-tau was significantly increased (p < 0.001). Correspondingly, the ratio of p-tau to t-tau was significantly reduced in ALS (p < 0.001). The area under the curve demonstrated poor sensitivity and specificity for p-tau, but moderate sensitivity and specificity for t-tau and p-tau/t-tau ratio. Thus, CSF p-tau by itself does not appear a suitable diagnostic biomarker for ALS, whereas CSF t-tau is a (probably unspecific) marker of the neuronal degeneration in ALS. PMID:25453560

  3. Identification and Calibration of Tau-Leptons in ATLAS

    E-print Network

    Drechsler, Eric; The ATLAS collaboration

    2015-01-01

    Hadronically decaying tau-leptons are important for Standard Model (SM), Higgs- and Beyond SM analyses and hence a crucial part of the ATLAS physics program. A correct understanding of the performance of the reconstructiona and identification algorithms is a key part for any analysis involving tau-leptons.

  4. Measurement of the $\\tau$ Neutrino Helicity and the Michel Parameters in Polarized $e^+ e^-$ Collisions

    E-print Network

    Abe, K; Allen, N J; Ash, W W; Aston, D; Baird, K G; Baltay, C; Band, H R; Barakat, M B; Baranko, G; Bardon, O; Barklow, T L; Bashindzhagian, G L; Bazarko, A O; Ben-David, R; Benvenuti, Alberto C; Bilei, G M; Bisello, D; Blaylock, G; Bogart, J R; Bolen, B; Bolton, T; Bower, G R; Brau, J E; Breidenbach, M; Bugg, W M; Burke, D; Burnett, T H; Burrows, P N; Busza, W; Calcaterra, A; Caldwell, D O; Calloway, D; Camanzi, B; Carpinelli, M; Cassell, R; Castaldi, R; Castro, A; Cavalli-Sforza, M; Chou, A; Church, E; Cohn, H O; Coller, J A; Cook, V; Cotton, R; Cowan, R F; Coyne, D G; Crawford, G; de Oliveira, A; Damerell, C J S; Daoudi, M; De Sangro, R; Dell'Orso, R; Dervan, P J; Dima, M; Dong, D N; Du, P Y C; Dubois, R; Eisenstein, B I; Elia, R; Etzion, E; Fahey, S; Falciai, D; Fan, C; Fernández, J P; Fero, M J; Frey, R; Furuno, K; Gillman, T; Gladding, G; González, S; Hart, E L; Harton, J L; Hasan, A; Hasegawa, Y; Hasuko, K; Hedges, S J; Hertzbach, S S; Hildreth, M D; Huber, J; Huffer, M E; Hughes, E W; Hwang, H; Iwasaki, Y; Jackson, D J; Jacques, P; Jaros, J A; Johnson, A S; Johnson, J R; Johnson, R A; Junk, T R; Kajikawa, R; Kalelkar, M; Kang, H J; Karliner, I; Kawahara, H; Kendall, H W; Kim, Y D; King, M E; King, R; Kofler, R R; Krishna, N M; Kroeger, R S; Labs, J F; Langston, M; Lath, A; Lauber, J A; Leith, D W G S; Lia, V; Liu, M X; Liu, X; Loreti, M; Lu, A; Lynch, H L; Ma, J; Mancinelli, G; Manly, S; Mantovani, G C; Markiewicz, T W; Maruyama, T; Masuda, H; Mazzucato, E; McKemey, A K; Meadows, B T; Messner, R; Mockett, P M; Moffeit, K C; Moore, T B; Müller, D; Nagamine, T; Narita, S; Nauenberg, U; Neal, H; Nussbaum, M; Ohnishi, Y; Osborne, L S; Panvini, R S; Park, C H; Park, H; Pavel, T J; Peruzzi, I; Piccolo, M; Piemontese, L; Pieroni, E; Pitts, K T; Plano, R J; Prepost, R; Prescott, C Y; Punkar, G D; Quigley, J; Ratcliff, B N; Reeves, T W; Reidy, J; Reinertsen, P L; Rensing, P E; Rochester, L S; Rowson, P C; Russell, J J; Saxton, O H; Schalk, T; Schindler, R H; Schumm, B A; Sen, S; Serbo, V V; Shaevitz, M H; Shank, J T; Shapiro, G; Sherden, D J; Shmakov, K D; Simopoulos, C; Sinev, N B; Smith, S R; Smy, M B; Snyder, J A; Stamer, P; Steiner, H; Steiner, R; Strauss, M G; Su, D; Suekane, F; Sugiyama, A; Suzuki, S; Swartz, M; Szumilo, A; Takahashi, T; Taylor, F E; Torrence, E; Trandafir, A I; Turk, J D; Usher, T; Vavra, J; Vannini, C; Vella, E; Venuti, J P; Verdier, R; Verdini, P G; Wagner, D L; Wagner, S R; Waite, A P; Watts, S J; Weidemann, A W; Weiss, E R; Whitaker, J S; White, S L; Wickens, F J; Williams, D A; Williams, D C; Williams, S H; Willocq, S; Wilson, R J; Wisniewski, W J; Woods, M; Word, G B; Wyss, J; Yamamoto, R K; Yamartino, J M; Yang, X; Yashima, J; Yellin, S J; Young, C C; Yuta, H; Zapalac, G; Zdarko, R W; Zhou, J

    1997-01-01

    We present a new measurement of the tau neutrino helicity, hnu and the tau Michel parameters rho, eta, xi and the product delta xi. The analysis exploits the highly polarized SLC electron beam to extract these quantities directly from a measurement of the tau decay spectra, using the 1993-1995 SLD data sample of 4328 e+e- --> Z0 --> tau+tau- events. From the decays tau --> pi nu(tau) and tau --> rho nu(tau) we obtain a combined value hnu=-0.93+/-0.10+/-0.04. The leptonic decay channels yield combined values of rho=0.69+/-0.13+/-0.05, eta=-0.13+/-0.47+/-0.15, xi=1.02+/-0.36+/-0.05 and delta xi= 0.87+/-0.27+/-0.04.

  5. Tau trigger, reconstruction and identification at CMS

    NASA Astrophysics Data System (ADS)

    Calabria, Cesare

    2014-08-01

    The importance of tau leptons in new physics searches at the LHC led the CMS collaboration to design a specific algorithm, the Hadron Plus Strip (HPS) algorithm, for the reconstruction and identification of taus decaying hadronically (?had). The HPS algorithm makes use of a particle description of the event to identify hadronic decay modes of ? leptons through the reconstruction of intermediate resonances. It also provides discriminators against potentially large backgrounds from quarks, gluons and light leptons (electrons and muons). Moreover, thanks to the particle event reconstruction avalaible in CMS, a fast online hadronic tau reconstruction can be performed allowing the development of efficient tau trigger selections which allow to perform a broad range of physics analysis. This report describes the ?had reconstruction and identification of the HPS algorithm and its performances, studied in simulated Z ? ?? events and in samples of proton-proton collision data collected during 2011 and 2012 data-taking at ?{ s} = 7 TeV and 8 TeV , respectively. Finally, the performance of the tau trigger selections is presented.

  6. Search for pair production of scalar top quarks decaying to a tau lepton and a b quark in 1.96 TeV ppbar collisions

    SciTech Connect

    Khotilovich, Vadim, G.; /Texas A-M

    2008-05-01

    I present the results of a search for pair production of scalar top quarks ({tilde t}{sub 1}) in an R-parity violating supersymmetric scenario using 322 pb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV collected by the upgraded Collider Detector at Fermilab. I assume each {tilde t}{sub 1} decays into a {tau} lepton and a b quark, with branching ratio {beta}, and search for final states containing either an electron or a muon from a leptonic {tau} decay, a hadronically decaying {tau} lepton, and two or more jets. Two candidate events pass my final selection criteria, consistent with the expectation from standard model processes. I present upper limits on the cross section times branching ratio squared {sigma}({tilde t}{sub 1}{bar {tilde t}}{sub 1}) x {beta}{sup 2} as a function of the stop mass m({tilde t}{sub 1}). Assuming {beta} = 1, I set a 95% confidence level limit m({tilde t}{sub 1}) > 153 GeV=c{sup 2}. These limits are also fully applicable to the case of a pair produced third generation scalar leptoquark that decays into a {tau} lepton and a b quark.

  7. First measurement of sigma (p anti-p ---> Z) . Br (Z ---> tau tau) at s**(1/2) = 1.96- TeV

    SciTech Connect

    Abazov, V.M.; Abbott, B.; Abolins, M.; Acharya, B.S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J.-L.; Ahn, S.H.; Ahsan, M.; Alexeev, G.D.; Alkhazov, G.; Alton, A.; Alverson, G.; Alves, G.A.; Anastasoaie, M.; Andeen, T.; Anderson, S.; Andrieu, B.; Arnoud, Y.; Askew, A.; /Buenos Aires U. /Rio de Janeiro, CBPF /Rio de Janeiro State U. /Sao

    2004-12-01

    The authors present a measurement of the cross section for Z production times the branching fraction to {tau} leptons, {sigma} {center_dot} Br(Z {yields} {tau}{sup +}{tau}{sup -}), in p{bar p} collisions at {radical}s = 1.96 TeV in the channel in which one {tau} decays into {mu}{nu}{sub {mu}}{nu}{sub {tau}}, and the other into hadrons + {nu}{sub {tau}} or e{nu}{sub e}{nu}{sub {tau}}. The data sample corresponds to an integrated luminosity of 226 pb{sup -1} collected with the D0 detector at the Fermilab Tevatron collider. The final sample contains 2008 candidate events with an estimated background of 55%. From this they obtain {sigma} {center_dot} Br(Z {yields} {tau}{sup +}{tau}{sup -}) = 237 {+-} 15(stat) {+-} 18(sys) {+-} 15(lum) pb, in agreement with the standard model prediction.

  8. Measurement of {sigma}(pp{yields}Z){center_dot}Br(Z{yields}{tau}{tau}) at {radical}(s)=1.96 TeV

    SciTech Connect

    Abazov, V.M.; Alexeev, G.D.; Kalinin, A.M.; Kharzheev, Y.M.; Malyshev, V.L.; Vertogradov, L.S.; Yatsunenko, Y.A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Abbott, B.; Gutierrez, P.; Hall, I.; Jain, S.; Kopal, M.; Severini, H.; Skubic, P.; Strauss, M.; Zhang, X. [University of Oklahoma, Norman, Oklahoma 73019 (United States); Abolins, M.; Brock, R.; Dyer, J.; Edmunds, D. [Michigan State University, East Lansing, Michigan 48824 (United States)] [and others

    2005-04-01

    We present a measurement of the cross section for Z production times the branching fraction to {tau} leptons, {sigma}{center_dot}Br(Z{yields}{tau}{sup +}{tau}{sup -}), in pp collisions at {radical}(s)=1.96 TeV in the channel in which one {tau} decays into {mu}{nu}{sub {mu}}{nu}{sub {tau}}, and the other into hadrons+{nu}{sub {tau}} or e{nu}{sub e}{nu}{sub {tau}}. The data sample corresponds to an integrated luminosity of 226 pb{sup -1} collected with the D0 detector at the Fermilab Tevatron collider. The final sample contains 2008 candidate events with an estimated background of 55%. From this we obtain {sigma}{center_dot}Br(Z{yields}{tau}{sup +}{tau}{sup -})=237{+-}15(stat){+-}18(sys){+-}15(lum)pb, in agreement with the standard model prediction.

  9. The dipion mass spectrum in e+e- annihilation and tau decay: Isospin symmetry breaking effects from the (rho, omega, phi) mixing

    SciTech Connect

    Benayoun, M.; David, P.; Del Buono, L.; /Paris U., VI-VII; Leitner, O.; /Paris U., VI-VII /Frascati; O'Connell, H.B.; /Fermilab

    2008-01-01

    A way to explain the puzzling difference between the pion form factor as measured in e{sup +}e{sup -} annihilations and in {tau} decays is discussed. We show that isospin symmetry breaking, beside the already identified effects, produces also a full mixing between the {rho}{sup 0}, {omega} and {phi} mesons which generates an isospin 0 component inside the {rho}{sup 0} meson. This effect, not accounted for in current treatments of the problem, seems able to account for the apparent mismatch between e{sup +}e{sup -} and {tau} data below the {phi} mass.

  10. Tau/Amyloid Beta 42 Peptide Test (Alzheimer Biomarkers)

    MedlinePLUS

    ... as: Alzheimer Biomarkers Formal name: Tau Protein and Amyloid Beta 42 Peptide Related tests: Phosporylated Tau (P-tau), ... Sample What is being tested? These tests measure amyloid beta 42 (Aß42) and tau protein in cerebrospinal fluid ( ...

  11. Tau Splicing and the Intricacies of Dementia

    PubMed Central

    Andreadis, Athena

    2011-01-01

    Tau is a microtubule associated protein that fulfills several functions critical for neuronal formation and health. Tau discharges its functions by producing multiple isoforms via regulated alternative splicing. These isoforms modulate tau function in normal brain by altering the domains of the protein, thereby influencing its localization, conformation and post-translational modifications and hence its availability and affinity for microtubules and other ligands. Disturbances in tau expression result in disruption of the neuronal cytoskeleton and formation of tau structures (neurofibrillary tangles) found in brains of dementia sufferers. More specifically, aberrations in tau splicing regulation directly cause several neurodegenerative diseases which lead to dementia. In this review, I present our cumulative knowledge of tau splicing regulation in connection with neurodegeneration and also briefly go over the still-extensive list of questions that are connected to tau (dys)function. PMID:21604267

  12. Search for neutral minimal supersymmetric standard model Higgs bosons decaying to tau pairs in pp collisions at ?s=7 TeV.

    PubMed

    Chatrchyan, S; Khachatryan, V; Sirunyan, A M; Tumasyan, A; Adam, W; Bergauer, T; Dragicevic, M; Erö, J; Fabjan, C; Friedl, M; Frühwirth, R; Ghete, V M; Hammer, J; Hänsel, S; Hoch, M; Hörmann, N; Hrubec, J; Jeitler, M; Kasieczka, G; Kiesenhofer, W; Krammer, M; Liko, D; Mikulec, I; Pernicka, M; Rohringer, H; Schöfbeck, R; Strauss, J; Teischinger, F; Wagner, P; Waltenberger, W; Walzel, G; Widl, E; Wulz, C-E; Mossolov, V; Shumeiko, N; Suarez Gonzalez, J; Benucci, L; De Wolf, E A; Janssen, X; Maes, T; Mucibello, L; Ochesanu, S; Roland, B; Rougny, R; Selvaggi, M; Van Haevermaet, H; Van Mechelen, P; Van Remortel, N; Blekman, F; Blyweert, S; D'Hondt, J; Devroede, O; Gonzalez Suarez, R; Kalogeropoulos, A; Maes, J; Maes, M; Van Doninck, W; Van Mulders, P; Van Onsem, G P; Villella, I; Charaf, O; Clerbaux, B; De Lentdecker, G; Dero, V; Gay, A P R; Hammad, G H; Hreus, T; Marage, P E; Thomas, L; Vander Velde, C; Vanlaer, P; Adler, V; Cimmino, A; Costantini, S; Grunewald, M; Klein, B; Lellouch, J; Marinov, A; McCartin, J; Ryckbosch, D; Thyssen, F; Tytgat, M; Vanelderen, L; Verwilligen, P; Walsh, S; Zaganidis, N; Basegmez, S; Bruno, G; Caudron, J; Ceard, L; Cortina Gil, E; De Favereau De Jeneret, J; Delaere, C; Favart, D; Giammanco, A; Grégoire, G; Hollar, J; Lemaitre, V; Liao, J; Militaru, O; Ovyn, S; Pagano, D; Pin, A; Piotrzkowski, K; Schul, N; Beliy, N; Caebergs, T; Daubie, E; Alves, G A; Damiao, D De Jesus; Pol, M E; Souza, M H G; Carvalho, W; Da Costa, E M; Martins, C De Oliveira; De Souza, S Fonseca; Mundim, L; Nogima, H; Oguri, V; Da Silva, W L Prado; Santoro, A; Do Amaral, S M Silva; Sznajder, A; De Araujo, F Torres Da Silva; Dias, F A; Tomei, T R Fernandez Perez; Gregores, E M; Lagana, C; Marinho, F; Mercadante, P G; Novaes, S F; Padula, Sandra S; Darmenov, N; Dimitrov, L; Genchev, V; Iaydjiev, P; Piperov, S; Rodozov, M; Stoykova, S; Sultanov, G; Tcholakov, V; Trayanov, R; Vankov, I; Dimitrov, A; Hadjiiska, R; Karadzhinova, A; Kozhuharov, V; Litov, L; Mateev, M; Pavlov, B; Petkov, P; Bian, J G; Chen, G M; Chen, H S; Jiang, C H; Liang, D; Liang, S; Meng, X; Tao, J; Wang, J; Wang, J; Wang, X; Wang, Z; Xiao, H; Xu, M; Zang, J; Zhang, Z; Ban, Y; Guo, S; Guo, Y; Li, W; Mao, Y; Qian, S J; Teng, H; Zhang, L; Zhu, B; Zou, W; Cabrera, A; Moreno, B Gomez; Rios, A A Ocampo; Oliveros, A F Osorio; Sanabria, J C; Godinovic, N; Lelas, D; Lelas, K; Plestina, R; Polic, D; Puljak, I; Antunovic, Z; Dzelalija, M; Brigljevic, V; Duric, S; Kadija, K; Morovic, S; Attikis, A; Galanti, M; Mousa, J; Nicolaou, C; Ptochos, F; Razis, P A; Finger, M; Finger, M; Assran, Y; Khalil, S; Mahmoud, M A; Hektor, A; Kadastik, M; Müntel, M; Raidal, M; Rebane, L; Azzolini, V; Eerola, P; Fedi, G; Czellar, S; Härkönen, J; Heikkinen, A; Karimäki, V; Kinnunen, R; Kortelainen, M J; Lampén, T; Lassila-Perini, K; Lehti, S; Lindén, T; Luukka, P; Mäenpää, T; Tuominen, E; Tuominiemi, J; Tuovinen, E; Ungaro, D; Wendland, L; Banzuzi, K; Korpela, A; Tuuva, T; Sillou, D; Besancon, M; Choudhury, S; Dejardin, M; Denegri, D; Fabbro, B; Faure, J L; Ferri, F; Ganjour, S; Gentit, F X; Givernaud, A; Gras, P; de Monchenault, G Hamel; Jarry, P; Locci, E; Malcles, J; Marionneau, M; Millischer, L; Rander, J; Rosowsky, A; Shreyber, I; Titov, M; Verrecchia, P; Baffioni, S; Beaudette, F; Benhabib, L; Bianchini, L; Bluj, M; Broutin, C; Busson, P; Charlot, C; Dahms, T; Dobrzynski, L; Elgammal, S; de Cassagnac, R Granier; Haguenauer, M; Miné, P; Mironov, C; Ochando, C; Paganini, P; Sabes, D; Salerno, R; Sirois, Y; Thiebaux, C; Wyslouch, B; Zabi, A; Agram, J-L; Andrea, J; Bloch, D; Bodin, D; Brom, J-M; Cardaci, M; Chabert, E C; Collard, C; Conte, E; Drouhin, F; Ferro, C; Fontaine, J-C; Gelé, D; Goerlach, U; Greder, S; Juillot, P; Karim, M; Le Bihan, A-C; Mikami, Y; Van Hove, P; Fassi, F; Mercier, D; Baty, C; Beauceron, S; Beaupere, N; Bedjidian, M; Bondu, O; Boudoul, G; Boumediene, D; Brun, H; Chierici, R; Contardo, D; Depasse, P; El Mamouni, H; Fay, J; Gascon, S; Ille, B; Kurca, T; Le Grand, T; Lethuillier, M; Mirabito, L; Perries, S; Sordini, V; Tosi, S; Tschudi, Y; Verdier, P; Lomidze, D; Anagnostou, G; Edelhoff, M; Feld, L; Heracleous, N; Hindrichs, O; Jussen, R; Klein, K; Merz, J; Mohr, N; Ostapchuk, A; Perieanu, A; Raupach, F; Sammet, J; Schael, S; Sprenger, D; Weber, H; Weber, M; Wittmer, B; Ata, M; Bender, W; Dietz-Laursonn, E; Erdmann, M; Frangenheim, J; Hebbeker, T; Hinzmann, A; Hoepfner, K; Klimkovich, T; Klingebiel, D; Kreuzer, P; Lanske, D; Magass, C; Merschmeyer, M; Meyer, A; Papacz, P; Pieta, H; Reithler, H; Schmitz, S A; Sonnenschein, L; Steggemann, J; Teyssier, D; Tonutti, M; Bontenackels, M; Davids, M; Duda, M; Flügge, G; Geenen, H; Giffels, M; Ahmad, W Haj; Heydhausen, D; Kress, T; Kuessel, Y; Linn, A; Nowack, A; Perchalla, L; Pooth, O; Rennefeld, J; Sauerland, P; Stahl, A; Thomas, M; Tornier, D; Zoeller, M H

    2011-06-10

    A search for neutral minimal supersymmetric standard model (MSSM) Higgs bosons in pp collisions at the LHC at a center-of-mass energy of 7 TeV is presented. The results are based on a data sample corresponding to an integrated luminosity of 36??pb(-1) recorded by the CMS experiment. The search uses decays of the Higgs bosons to tau pairs. No excess is observed in the tau-pair invariant-mass spectrum. The resulting upper limits on the Higgs boson production cross section times branching fraction to tau pairs, as a function of the pseudoscalar Higgs boson mass, yield stringent new bounds in the MSSM parameter space. PMID:21770497

  13. Phosphorylation-Dependent Epitopes of Neurofilament Antibodies on Tau Protein and Relationship with Alzheimer Tau

    Microsoft Academic Search

    B. Lichtenberg-Kraag; E.-M. Mandelkow; J. Biernat; B. Steiner; C. Schroter; N. Gustke; H. E. Meyer

    1992-01-01

    We have studied the phosphorylation of tau protein from Alzheimer paired helical filaments, of tau from normal human brain, and of recombinant tau isoforms. As a tool we used monoclonal antibodies against neurofilament protein [Sternberger, N., Sternberger, L. & Ulrich, J. (1985) Proc. Natl. Acad. Sci. USA 82, 4274-4276 that crossreact with tau in a phosphorylation-dependent manner. This allowed us

  14. Tau Laws for Pi Calculus Zhenrong Yang

    E-print Network

    Fu, Yuxi

    Tau Laws for Pi Calculus Yuxi Fu Zhenrong Yang Department of Computer Science Shanghai Jiaotong the open congruences are revealed. Several new tau laws are discovered and their relationship is discussed. The contributions of the paper are mainly as follows: 1. It is proved that Milner's three tau laws fail to lift

  15. Tau protein pathology in neurodegenerative diseases

    Microsoft Academic Search

    Maria Grazia Spillantini; Michel Goedert

    1998-01-01

    Abundant tau-positive neurofibrillary lesions constitute a defining neuropathological characteristic of Alzheimer's disease. Filamentous tau pathology is also central to a number of other dementing disorders, such as Pick's disease, progressive supranuclear palsy, corticobasal degeneration and familial frontotemporal dementia and Parkinsonism linked to chromosome 17 (FTDP-17). The discovery of mutations in the tau gene in FTDP-17 has firmly established the relevance

  16. Increase in tau tyrosine phosphorylation correlates with the formation of tau aggregates.

    PubMed

    Vega, Irving E; Cui, Li; Propst, Josh A; Hutton, Michael L; Lee, Gloria; Yen, Shu-Hui

    2005-08-18

    Tauopathies are neurodegenerative disorders characterized by aberrant intracellular aggregation of hyperphosphorylated tau. It has been shown that aggregated tau is phosphorylated at serine, threonine, and tyrosine residues. However, the occurrence of tyrosine phosphorylation on tau proteins at different states of tau aggregation has not been shown. In this report, we utilized the tauopathy mouse model JNPL3 that expresses human 0N4R tau isoform bearing the missense P301L mutation to study the occurrence of tau tyrosine phosphorylation in the course of the development of tau aggregation. These mice develop behavioral and motor deficits and form sarkosyl-insoluble hyperphosphorylated tau in an age-dependent manner. Mass spectrometry analyses of immunopurified brain tau proteins from JNPL3 and Alzheimer's disease affected individual uncovered novel tau tyrosine-phosphorylated sites. Further studies demonstrated that the abundance of tyrosine-phosphorylated tau increases in an age-dependent manner in JNPL3 mice. Tyrosine-phosphorylated tau was detected in both soluble and sarkosyl-insoluble preparations derived from brain and spinal cord, and localized in neurons containing aggregated tau. The phosphorylation of tyrosine residues in tau appeared to occur along with that of serine and threonine residues and was not detectable in non-transgenic littermates and transgenic mice expressing 0N4R wild-type human tau. The results suggest that tyrosine phosphorylation is as important as phosphorylation of other residues in tauopathy. PMID:15913839

  17. Measurements of the tau mass and the mass difference of the tau+ and tau- at BABAR

    E-print Network

    Fisher, Peter H.

    We present the result from a precision measurement of the mass of the tau lepton, M?, based on 423??fb[subscript -1] of data recorded at the ?(4S) resonance with the BABAR detector. Using a pseudomass endpoint method, we ...

  18. Measurement of the Tau- to F1(1285) Pi- Nu/Tau Branching Fraction And a Search for Second-Class Currents in Tau to Eta-Prime(958) Pi- Nu/Tau

    SciTech Connect

    Alwyn, K.E.; /Manchester U.

    2011-12-01

    The {tau}{sup -} {yields} {eta}{pi}{sup -}{pi}+{pi}{sup -}{nu}{tau} decay with the {eta} {yields} {gamma}{gamma} mode is studied using 384 fb{sup -1} of data collected by the BaBar detector. The branching fraction is measured to be (1.60 {+-} 0.05 {+-} 0.11) x 10{sup -4}. It is found that {tau}{sup -} {yields} f1(1285){pi}{sup -}{nu}{tau} {yields} {eta}{pi}{sup -}{pi}+{pi}{sup -}{nu}{tau} is the dominant decay mode with a branching fraction of (1.11 {+-} 0.06 {+-} 0.05) x 10{sup -4}. The first error is statistical and the second systematic. In addition, a 90% confidence level upper limit on the branching fraction of the {tau}{sup -} {yields} {eta}{prime}(958){pi}{sup -}{nu}{tau} decay is measured to be 7.2 x 10{sup -6}. This last decay proceeds through a second-class current and is expected to be forbidden in the limit of isospin symmetry.

  19. Evidence for B{sup -{yields}{tau}-{nu}}{sub {tau}}with a semileptonic tagging method

    SciTech Connect

    Hara, K.; Iijima, T.; Hayasaka, K.; Inami, K.; Miyazaki, Y.; Mori, T.; Ohshima, T.; Senyo, K. [Nagoya University, Nagoya (Japan); Aihara, H. [Department of Physics, University of Tokyo, Tokyo (Japan); Aulchenko, V.; Bondar, A.; Eidelman, S.; Gabyshev, N.; Kuzmin, A.; Shwartz, B.; Zhilich, V.; Zyukova, O. [Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation); Novosibirsk State University, Novosibirsk (Russian Federation); Aushev, T. [Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne (Switzerland); Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Aziz, T.; Mohanty, G. B. [Tata Institute of Fundamental Research, Mumbai (India)

    2010-10-01

    We present a measurement of the decay B{sup -{yields}{tau}-{nu}}{sub {tau}}using a data sample containing 657x10{sup 6} BB pairs collected at the {Upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider. A sample of B{sup +}B{sup -} pairs are tagged by reconstructing one B{sup +} meson decaying semileptonically. We detect the B{sup -{yields}{tau}-{nu}}{sub {tau}}candidate in the recoil. We obtain a signal with a significance of 3.6 standard deviations including systematic uncertainties, and measure the branching fraction to be B(B{sup -{yields}{tau}-{nu}}{sub {tau}})=[1.54{sub -0.37}{sup +0.38}(stat){sub -0.31}{sup +0.29}(syst)]x10{sup -4}. This result confirms the evidence for B{sup -{yields}{tau}-{nu}}{sub {tau}}obtained in a previous Belle measurement that used a hadronic B tagging method.

  20. Measurement of the tau lepton electronic branching fraction

    Microsoft Academic Search

    D. S. Akerib; B. Barish; M. Chadha; D. F. Cowen; G. Eigen; J. S. Miller; J. Urheim; A. J. Weinstein; D. Acosta; G. Masek; B. Ong; H. Paar; M. Sivertz; A. Bean; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; H. N. Nelson; J. D. Richman; H. Tajima; D. Schmidt; D. Sperka; M. S. Witherell; M. Procario; S. Yang; M. Daoudi; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; D. Besson; T. E. Browder; D. G. Cassel; D. M. Coffman; P. S. Drell; R. Ehrlich; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; K. Honscheid; C. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; C. O'grady; J. R. Patterson; D. Peterson; D. Riley; M. Sapper; M. Selen; H. Worden; M. Worris; F. Wuerthwein; P. Avery; A. Freyberger; J. Rodriguez; R. Stephens; J. Yelton; D. Cinabro; S. Henderson; K. Kinoshita; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; A. J. Sadoff; R. Ammar; S. Ball; P. Baringer; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; N. Kwak; H. Lam; Y. Kubota; M. Lattery; J. K. Nelson; S. Patton; D. Perticone; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; B. Nemati; J. J. O'neill; V. Romero; H. Severini; C. R. Sun; P.-N. Wang; M. M. Zoeller; G. Crawford; R. Fulton; K. K. Gan; H. Kagan; R. Kass; J. Lee; R. Malchow; F. Morrow; M. Sung; C. White; J. Whitmore; P. Wilson; F. Butler; X. Fu; G. Kalbfleisch; M. Lambrecht; W. R. Ross; P. Skubic; J. Snow; P.-L. Wang; D. Bortoletto; D. N. Brown; J. Dominick; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; S. F. Schaffner; E. I. Shibata; I. P. Shipsey; M. Battle; J. Ernst; H. Kroha; S. Roberts; K. Sparks; E. H. Thorndike; C.-H. Wang; S. Sanghera; T. Skwarnicki; R. Stroynowski; M. Artuso; M. Goldberg; N. Horwitz; R. Kennett; G. C. Moneti; F. Muheim; S. Playfer; Y. Rozen; P. Rubin; S. Stone; M. Thulasidas; W.-M. Yao; G. Zhu; A. V. Barnes; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; P. Sheldon

    1992-01-01

    The tau lepton electron branching fraction has been measured with the CLEO II detector at the Cornell Electron Storage Ring as Be=0.1749+\\/-0.0014+\\/-0.0022, with the first error statistical and the second systematic. The measurement involves counting electron-positron annihilation events in which both taus decay to electrons, and normalizing to the number of tau-pair decays expected from the measured luminosity. Detected photons

  1. Measurement of the Z to tau tau cross section with the ATLAS detector

    SciTech Connect

    Aad, G.; Abbott, B; Abdallah, J; Abdelalim, AA; Abdesselam, A; Abdinov, O; Abi, B; Abolins, M; Abramowicz, H; Abreu, H; Acerbi, E; Acharya, BS; Adams, DL; Addy, TN; Adelman, J; Aderholz, M; Adomeit, S; Adragna, P; Adye, T; Aefsky, S; Aguilar-Saavedra, JA

    2011-12-14

    The Z {yields} {tau}{tau} cross section is measured with the ATLAS experiment at the LHC in four different final states determined by the decay modes of the {tau} leptons: muon-hadron, electron-hadron, electron-muon, and muon-muon. The analysis is based on a data sample corresponding to an integrated luminosity of 36 pb{sup -1}, at a proton-proton center-of-mass energy of {radical}s = 7 TeV. Cross sections are measured separately for each final state in fiducial regions of high detector acceptance, as well as in the full phase space, over the mass region 66-116 GeV. The individual cross sections are combined and the product of the total Z production cross section and Z {yields} {tau}{tau} branching fraction is measured to be 0.97 {+-} 0.07(stat) {+-} 0.06(syst) {+-} 0.03(lumi) nb, in agreement with next-to-next-to-leading order calculations.

  2. Extracellular Monomeric Tau Protein Is Sufficient to Initiate the Spread of Tau Protein Pathology*

    PubMed Central

    Michel, Claire H.; Kumar, Satish; Pinotsi, Dorothea; Tunnacliffe, Alan; St. George-Hyslop, Peter; Mandelkow, Eckhard; Mandelkow, Eva-Maria; Kaminski, Clemens F.; Kaminski Schierle, Gabriele S.

    2014-01-01

    Understanding the formation and propagation of aggregates of the Alzheimer disease-associated Tau protein in vivo is vital for the development of therapeutics for this devastating disorder. Using our recently developed live-cell aggregation sensor in neuron-like cells, we demonstrate that different variants of exogenous monomeric Tau, namely full-length Tau (hTau40) and the Tau-derived construct K18 comprising the repeat domain, initially accumulate in endosomal compartments, where they form fibrillar seeds that subsequently induce the aggregation of endogenous Tau. Using superresolution imaging, we confirm that fibrils consisting of endogenous and exogenous Tau are released from cells and demonstrate their potential to spread Tau pathology. Our data indicate a greater pathological risk and potential toxicity than hitherto suspected for extracellular soluble Tau. PMID:24235150

  3. First Measurement of $\\bm{\\sigma (p \\bar p \\to Z) \\cdot}$Br$\\bm{(Z \\to \\tau \\tau)}$ at $\\bm{\\sqrt{s}=}$1.96 TeV

    E-print Network

    Abazov, V M; Abolins, M; Acharya, B S; Adams, D L; Adams, M; Adams, T; Agelou, M; Agram, J L; Ahmed, S N; Ahn, S H; Alexeev, G D; Alkhazov, G; Alton, A; Alverson, G; Alves, G A; Anderson, S; Andrieu, B; Arnoud, Y; Askew, A; Åsman, B; Autermann, C; Avila, C; Babukhadia, L; Bacon, Trevor C; Baden, A; Baffioni, S; Baldin, B Yu; Balm, P W; Banerjee, S; Barberis, E; Bargassa, P; Baringer, P; Barnes, C; Barreto, J; Bartlett, J F; Bassler, U; Bauer, D; Bean, A; Beauceron, S; Beaudette, F; Begel, M; Beri, S B; Bernardi, G; Bertram, I; Besançon, M; Besson, A; Beuselinck, R; Bezzubov, V A; Bhat, P C; Bhatnagar, V; Bhattacharjee, M; Binder, M; Bischoff, A; Black, K M; Blackler, I; Blazey, G; Blekman, F; Bloch, D; Blumenschein, U; Böhnlein, A; Bolton, T; Bonamy, P; Borcherding, F; Borissov, G; Bos, K; Bose, T; Boswell, C; Brandt, A; Briskin, G; Brock, R; Brooijmans, G; Bross, A; Buchholz, D; Bühler, M; Büscher, V; Burdin, S; Burnett, T H; Busato, E; Butler, J M; Bystrický, J; Canelli, F; Carvalho, W; Casey, B C K; Casey, D; Cason, N M; Castilla-Valdez, H; Chakrabarti, S; Chakraborty, D; Chan, K M; Chandra, A; Chapin, D; Charles, F; Cheu, E; Chevalier, L; Cho, D K; Choi, S; Chopra, S; Christiansen, T; Christofek, L; Claes, D; Clark, A R; Clément, C; Coadou, Y; Colling, D J; Coney, L; Connolly, B; Cooper, W E; Coppage, D; Corcoran, M; Coss, J; Cothenet, A; Cousinou, M C; Crepe-Renaudin, S; Cristetiu, M; Cummings, M A C; Cutts, D; Da Motta, H; Davies, B; Davies, G; Davis, G A; De, K; de Jong, P; De Jong, S J; De La Cruz-Burelo, E; De Oliveira Martins, C; Dean, S; Del Signore, K; Déliot, F; Delsart, P A; Demarteau, M; Demina, R; Demine, P; Denisov, D; Denisov, S P; Desai, S; Diehl, H T; Diesburg, M; Doidge, M; Dong, H; Doulas, S; Duflot, L; Dugad, S R; Duperrin, A; Dyer, J; Dyshkant, A; Eads, M; Edmunds, D; Edwards, T; Ellison, J; Elmsheuser, J; Eltzroth, J T; Elvira, V D; Eno, S; Ermolov, P; Eroshin, O V; Estrada, J; Evans, D; Evans, H; Evdokimov, A; Evdokimov, V N; Fast, J; Fatakia, S N; Fein, D; Feligioni, L; Ferbel, T; Fiedler, F; Filthaut, F; Fisk, H E; Fleuret, F; Fortner, M; Fox, H; Freeman, W; Fu, S; Fuess, S; Galea, C F; Gallas, E; Galyaev, E; Gao, M; García, C; García-Bellido, A; Gardner, J; Gavrilov, V; Gelé, D; Gelhaus, R; Genser, K; Gerber, C E; Gershtein, Yu; Geurkov, G; Ginther, G; Goldmann, K S; Golling, T; Gómez, B; Gounder, K; Goussiou, A; Graham, G; Grannis, P D; Greder, S; Green, J A; Greenlee, H; Greenwood, Z D; Gregores, E M; Grinstein, S; Grivaz, J F; Groer, L S; Grünendahl, S; Grünewald, M W; Gu, W; Gurzhev, S N; Gutíerrez, G; Gutíerrez, P; Haas, A; Hadley, N J; Haggerty, H; Hagopian, S L; Hall, I; Hall, R E; Han, C; Han, L; Hanagaki, K; Hanlet, P; Harder, K; Hauptman, J M; Hauser, R; Hays, C; Hays, J; Hebert, C; Hedin, D; Heinmiller, J M; Heinson, A P; Heintz, U; Hensel, C; Hesketh, G; Hildreth, M D; Hirosky, R; Hobbs, J D; Hoeneisen, B; Hohlfeld, M; Hong, S J; Hooper, R; Hou, S; Hu, Y; Huang, J; Huang, Y; Iashvili, I; Illingworth, R; Ito, A S; Jabeen, S; Jaffré, M; Jain, S; Jain, V; Jakobs, K; Jenkins, A; Jesik, R; Jiang, Y; Johns, K; Johnson, M; Johnson, P; Jonckheere, A; Jonsson, P; Jöstlein, H; Juste, A; Kado, M; Käfer, D; Kahl, W; Kahn, S; Kajfasz, E; Kalinin, A M; Kalk, J; Karmanov, D; Kasper, J; Kau, D; Ke, Z; Kehoe, R; Kermiche, S; Kesisoglou, S; Khanov, A; Kharchilava, A I; Kharzheev, Yu M; Kim, K H; Klima, B; Klute, M; Kohli, J M; Kopal, M; Korablev, V; Kotcher, J; Kothari, B; Kotwal, A V; Koubarovsky, A; Kouchner, A; Kuznetsov, O; Kozelov, A V; Kozminski, J; Krane, J; Krishnaswamy, M R; Krzywdzinski, S; Kubantsev, M A; Kuleshov, S; Kulik, Y; Kunori, S; Kupco, A; Kurca, T; Kuznetsov, V E; Lager, S; Lahrichi, N; Landsberg, G L; Lazoflores, J; Le Bihan, A C; Lebrun, P; Lee, S W; Lee, W M; Leflat, A; Leggett, C; Lehner, F; Leonidopoulos, C; Lewis, P; Li, J; Li, Q Z; Li, X; Lima, J G R; Lincoln, D; Linn, S L; Linnemann, J T; Lipton, R; Lobo, L; Lobodenko, A A; Lokajícek, M; Lounis, A; Lü, J; Lubatti, H J; Lucotte, A; Lueking, L H; Luo, C; Lynker, M; Lyon, A L; Maciel, A K A; Madaras, R J; Magnan, A M; Maity, M; Mal, P K; Malik, S; Malyshev, V L; Manankov, V; Mao, H S; Maravin, Y; Marshall, T; Martens, M; Martin, M I; Mattingly, S E K; Mayorov, A A; McCarthy, R; McCroskey, R; McMahon, T; Meder, D; Melanson, H L; Melnitchouk, A S; Meng, X; Merkin, M; Merritt, K W B; Meyer, A; Miao, C; Miettinen, H; Mihalcea, D; Mishra, C S; Mitrevski, J; Mokhov, N V; Molina, J; Mondal, N K; Montgomery, H E; Moore, R W; Mostafa, M A; Muanza, G S; Mulders, M; Mutaf, Y D; Nagy, E; Nang, F; Narain, M; Narasimham, V S; Naumann, N A; Neal, H A; Negret, J P; Nelson, S; Neustroev, P; Nöding, C; Nomerotski, A; Novaes, S F; Nunnemann, T; Nurse, E; O'Dell, V; O'Neil, D C; Oguri, V; Oliveira, N; Olivier, B; Oshima, N; Oteroy-Garzon, G J; Padley, P; Papageorgiou, K; Parashar, N; Park, J

    2004-01-01

    We present a measurement of the cross section for $Z$ production times the branching fraction to $\\tau$ leptons, $\\sigma \\cdot$Br$(Z\\to \\tau^+ \\tau^-)$, in $p \\bar p$ collisions at $\\sqrt{s}=$1.96 TeV in the channel in which one $\\tau$ decays into $\\mu \

  4. Measurement of the tau lepton mass by the Beijing Spectrometer (BES) Collaboration

    SciTech Connect

    Soderstrom, E.; BES Collaboration

    1992-11-01

    The mass of the {tau} lepton has been measured at the Beijing Electron Positron Collider using the Beijing Spectrometer. A search near threshold for e{sup +}e{sup {minus}} {yields} {tau}{sup +}{tau}{sup {minus}} was performed. Candidate events were identified by requiring that one {tau} decay via {tau} {yields} e{nu}{bar {nu}}, and the other via {tau} {yields} {mu}{nu}{bar {nu}}. The mass value, obtained from a fit to the energy dependence of the {tau}{sup +}{tau}{sup {minus}} cross section, is m{sub {tau}} = 1776.9{sub -0.5}{sup +0.4} {plus_minus} 0.2 MeV.

  5. Ethanol enhances tau accumulation in neuroblastoma cells that inducibly express tau

    PubMed Central

    Gendron, Tania F.; McCartney, Sharon; Causevic, Ena; Ko, Li-wen; Yen, Shu-Hui

    2008-01-01

    Chronic alcohol consumption causes pathological changes in the brain and neuronal loss. Ethanol toxicity may partially result from the perturbation of microtubule associated proteins, like tau. Tau dysfunction is well known for its involvement in certain neurodegenerative diseases, such as Alzheimer's disease. In the present study, the effect of ethanol on tau was examined using differentiated human neuroblastoma cells that inducibly express the 4R0N isoform of tau via a tetracycline-off expression system. During tau induction, ethanol exposure (1.25-5 mg/ml) dose-dependently increased tau protein levels and reduced cell viability. The increase in cell death likely resulted from tau accumulation since increased levels of tau were sufficient to reduce cell viability and ethanol was toxic to cells expressing tau but not to non-induced controls. Tau accumulation did not result from greater tetracycline-off induction since ethanol neither increased tau mRNA expression nor the expression of the tetracycline-controlled transactivator. Additionally, ethanol increased endogenous tau protein levels in neuroblastoma cells lacking the tetracycline-off induction system for tau. Ethanol delayed tau clearance suggesting ethanol impedes its degradation. Though ethanol inhibited neither cathepsin B, cathepsin D, nor chymotrypsin-like activity, it did significantly reduce calpain 1 expression and activity. Calpain I knockdown by shRNA increased tau levels indicating that calpain participates in tau degradation in this model. Moreover, the activation of calpain, by the calcium ionophore A23187, partially reversed the accumulation of tau resulting from ethanol exposure. Impaired calpain-mediated degradation may thus contribute to the increased accumulation of tau caused by ethanol. PMID:18672021

  6. Search for neutral Higgs bosons decaying to tau pairs produced in association with b quarks in pp? collisions at ?s=1.96 TeV

    SciTech Connect

    Abazov, Victor Mukhamedovich [Dubna, JINR; Abbott, Braden Keim [Oklahoma U.; Acharya, Bannanje Sripath [Tata Inst.; Adams, Mark Raymond [Illinois U., Chicago; Adams, Todd [Florida State U.; Alexeev, Guennadi D [Dubna, JINR; Alkhazov, Georgiy D [St. Petersburg, INP; Alton, Andrew K [Michigan U.; Augustana Coll., Sioux Falls; Alverson, George O [Northeastern U.; Alves, Gilvan Augusto [Rio de Janeiro, CBPF; Aoki, Masato [Fermilab; Louisiana Tech. U.

    2011-09-12

    We report results from a search for neutral Higgs bosons produced in association with b quarks using data recorded by the D0 experiment at the Fermilab Tevatron Collider and corresponding to an integrated luminosity of 7.3 fb-1. This production mode can be enhanced in several extensions of the standard model (SM) such as in its minimal supersymmetric extension (MSSM) at high tanß. We search for Higgs bosons decaying to tau pairs with one tau decaying to a muon and neutrinos and the other to hadrons. The data are found to be consistent with SM expectations, and we set upper limits on the cross section times branching ratio in the Higgs boson mass range from 90 to 320 GeV/c2. We interpret our result in the MSSM parameter space, excluding tanß values down to 25 for Higgs boson masses below 170 GeV/c2.

  7. Search for neutral Higgs bosons decaying to tau pairs produced in association with b quarks in pp? collisions at ?s=1.96 TeV

    DOE PAGESBeta

    Abazov, Victor Mukhamedovich [Dubna, JINR; Abbott, Braden Keim [Oklahoma U.; Acharya, Bannanje Sripath [Tata Inst.; Adams, Mark Raymond [Illinois U., Chicago; Adams, Todd [Florida State U.; Alexeev, Guennadi D [Dubna, JINR; Alkhazov, Georgiy D [St. Petersburg, INP; Alton, Andrew K [Michigan U.; Augustana Coll., Sioux Falls; Alverson, George O [Northeastern U.; Alves, Gilvan Augusto [Rio de Janeiro, CBPF; Aoki, Masato [Fermilab; Louisiana Tech. U.

    2011-09-12

    We report results from a search for neutral Higgs bosons produced in association with b quarks using data recorded by the D0 experiment at the Fermilab Tevatron Collider and corresponding to an integrated luminosity of 7.3 fb-1. This production mode can be enhanced in several extensions of the standard model (SM) such as in its minimal supersymmetric extension (MSSM) at high tanß. We search for Higgs bosons decaying to tau pairs with one tau decaying to a muon and neutrinos and the other to hadrons. The data are found to be consistent with SM expectations, and we set upper limits on the cross section times branching ratio in the Higgs boson mass range from 90 to 320 GeV/c2. We interpret our result in the MSSM parameter space, excluding tanß values down to 25 for Higgs boson masses below 170 GeV/c2.

  8. Search for Neutral Higgs Bosons of the Minimal Supersymmetric Standard Model Decaying to tau Pairs in pp¯ Collisions at &surd;(s)=1.96 TeV

    Microsoft Academic Search

    A. Abulencia; D. Acosta; J. Adelman; T. Affolder; T. Akimoto; M. G. Albrow; D. Ambrose; S. Amerio; D. Amidei; A. Anastassov; K. Anikeev; A. Annovi; J. Antos; M. Aoki; G. Apollinari; J.-F. Arguin; T. Arisawa; A. Artikov; W. Ashmanskas; A. Attal; F. Azfar; P. Azzi-Bacchetta; P. Azzurri; N. Bacchetta; H. Bachacou; W. Badgett; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; S. Baroiant; V. Bartsch; G. Bauer; F. Bedeschi; S. Behari; S. Belforte; G. Bellettini; J. Bellinger; A. Belloni; E. Ben-Haim; D. Benjamin; A. Beretvas; J. Beringer; T. Berry; A. Bhatti; M. Binkley; D. Bisello; M. Bishai; R. E. Blair; C. Blocker; K. Bloom; B. Blumenfeld; A. Bocci; A. Bodek; V. Boisvert; G. Bolla; A. Bolshov; D. Bortoletto; J. Boudreau; S. Bourov; A. Boveia; B. Brau; C. Bromberg; E. Brubaker; J. Budagov; H. S. Budd; S. Budd; K. Burkett; G. Busetto; P. Bussey; K. L. Byrum; S. Cabrera; M. Campanelli; M. Campbell; F. Canelli; A. Canepa; D. Carlsmith; R. Carosi; S. Carron; M. Casarsa; A. Castro; P. Catastini; D. Cauz; M. Cavalli-Sforza; A. Cerri; L. Cerrito; S. H. Chang; J. Chapman; Y. C. Chen; M. Chertok; G. Chiarelli; G. Chlachidze; F. Chlebana; I. Cho; K. Cho; D. Chokheli; J. P. Chou; P. H. Chu; S. H. Chuang; K. Chung; W. H. Chung; Y. S. Chung; M. Ciljak; C. I. Ciobanu; M. A. Ciocci; A. Clark; D. Clark; M. Coca; A. Connolly; M. E. Convery; J. Conway; B. Cooper; K. Copic; M. Cordelli; G. Cortiana; A. Cruz; J. Cuevas; R. Culbertson; D. Cyr; S. Daronco; S. D'Auria; M. D'Onofrio; D. Dagenhart; P. de Barbaro; S. de Cecco; A. Deisher; G. de Lentdecker; M. Dell'Orso; S. Demers; L. Demortier; J. Deng; M. Deninno; D. de Pedis; P. F. Derwent; C. Dionisi; J. Dittmann; P. Dituro; C. Dörr; A. Dominguez; S. Donati; M. Donega; P. Dong; J. Donini; T. Dorigo; S. Dube; K. Ebina; J. Efron; J. Ehlers; R. Erbacher; D. Errede; S. Errede; R. Eusebi; H. C. Fang; S. Farrington; I. Fedorko; W. T. Fedorko; R. G. Feild; M. Feindt; J. P. Fernandez; R. Field; G. Flanagan; L. R. Flores-Castillo; A. Foland; S. Forrester; G. W. Foster; M. Franklin; J. C. Freeman; Y. Fujii; I. Furic; A. Gajjar; M. Gallinaro; J. Galyardt; J. E. Garcia; M. Garcia Sciveres; A. F. Garfinkel; C. Gay; H. Gerberich; E. Gerchtein; D. Gerdes; S. Giagu; P. Giannetti; A. Gibson; K. Gibson; C. Ginsburg; K. Giolo; M. Giordani; M. Giunta; G. Giurgiu; V. Glagolev; D. Glenzinski; M. Gold; N. Goldschmidt; J. Goldstein; G. Gomez; G. Gomez-Ceballos; M. Goncharov; O. González; I. Gorelov; A. T. Goshaw; Y. Gotra; K. Goulianos; A. Gresele; M. Griffiths; S. Grinstein; C. Grosso-Pilcher; U. Grundler; J. Guimaraes da Costa; C. Haber; S. R. Hahn; K. Hahn; E. Halkiadakis; B.-Y. Han; R. Handler; F. Happacher; K. Hara; M. Hare; S. Harper; R. F. Harr; R. M. Harris; K. Hatakeyama; J. Hauser; C. Hays; H. Hayward; A. Heijboer; B. Heinemann; J. Heinrich; M. Hennecke; M. Herndon; J. Heuser; D. Hidas; C. S. Hill; D. Hirschbuehl; A. Hocker; A. Holloway; S. Hou; M. Houlden; S.-C. Hsu; B. T. Huffman; R. E. Hughes; J. Huston; K. Ikado; J. Incandela; G. Introzzi; M. Iori; Y. Ishizawa; A. Ivanov; B. Iyutin; E. James; D. Jang; B. Jayatilaka; D. Jeans; H. Jensen; E. J. Jeon; M. Jones; K. K. Joo; S. Y. Jun; T. R. Junk; T. Kamon; J. Kang; M. Karagoz-Unel; P. E. Karchin; Y. Kato; Y. Kemp; R. Kephart; U. Kerzel; V. Khotilovich; B. Kilminster; D. H. Kim; H. S. Kim; J. E. Kim; M. J. Kim; S. B. Kim; S. H. Kim; Y. K. Kim; M. Kirby; L. Kirsch; S. Klimenko; M. Klute; B. Knuteson; B. R. Ko; H. Kobayashi; K. Kondo; D. J. Kong; J. Konigsberg; K. Kordas; A. Korytov; A. V. Kotwal; A. Kovalev; J. Kraus; I. Kravchenko; M. Kreps; A. Kreymer; J. Kroll; N. Krumnack; M. Kruse; V. Krutelyov; S. E. Kuhlmann; Y. Kusakabe; S. Kwang; A. T. Laasanen; S. Lai; S. Lami; S. Lammel; M. Lancaster; R. L. Lander; K. Lannon; A. Lath; G. Latino; I. Lazzizzera; C. Lecci; T. Lecompte; J. Lee; S. W. Lee; R. Lefèvre; N. Leonardo; S. Leone; S. Levy; J. D. Lewis; K. Li; C. Lin; M. Lindgren; E. Lipeles; T. M. Liss; A. Lister; D. O. Litvintsev; T. Liu; Y. Liu; N. S. Lockyer; A. Loginov; M. Loreti; P. Loverre; R.-S. Lu; D. Lucchesi; P. Lujan; P. Lukens; G. Lungu; L. Lyons; J. Lys; R. Lysak; E. Lytken; P. Mack; D. MacQueen; R. Madrak; K. Maeshima; P. Maksimovic; G. Manca; F. Margaroli; R. Marginean; C. Marino; A. Martin; M. Martin; V. Martin; M. Martínez; T. Maruyama; H. Matsunaga; M. E. Mattson; R. Mazini; P. Mazzanti; K. S. McFarland; D. McGivern; P. McIntyre; P. McNamara; R. McNulty; A. Mehta; S. Menzemer; A. Menzione; P. Merkel; C. Mesropian; A. Messina; M. von der Mey; T. Miao; N. Miladinovic; J. Miles; R. Miller; J. S. Miller; C. Mills; M. Milnik; R. Miquel; S. Miscetti; G. Mitselmakher; A. Miyamoto; N. Moggi; B. Mohr; R. Moore; M. Morello; P. Movilla Fernandez; J. Mülmenstädt; A. Mukherjee; M. Mulhearn; Th. Muller; R. Mumford; P. Murat; J. Nachtman; S. Nahn; I. Nakano; A. Napier; D. Naumov; V. Necula; C. Neu; M. S. Neubauer; J. Nielsen; T. Nigmanov

    2006-01-01

    We present a search for neutral supersymmetric Higgs bosons decaying to tau pairs produced in p pmacr collisions at s=1.96TeV. The data, corresponding to 310pb-1 integrated luminosity, were collected with the Collider Detector at Fermilab in run II of the Tevatron. No significant excess above the standard model backgrounds is observed. We set exclusion limits on the production cross section

  9. The lepton flavor violating decay {tau}{sup {+-}} {yields} Micro-Sign {sup {+-}} Micro-Sign {sup {+-}} Micro-Sign {sup Minus-Or-Plus-Sign} at LHCb

    SciTech Connect

    Keune, A., E-mail: anne.keune@epfl.ch [Ecole Polytechnique Federale de Lausanne, Laboratoire de Physique des Hautes Energies (Switzerland)

    2012-09-15

    The possibility of improving the limit on the branching fraction of the lepton flavor violating decay {tau}{sup {+-}} {yields} Micro-Sign {sup {+-}} Micro-Sign {sup {+-}} Micro-Sign {sup Minus-Or-Plus-Sign} at LHCb is discussed. It is shown that a simple, cut-based analysis is sufficient to improve the upper limit on this branching fraction within the lifetime of LHCb.

  10. Determination of the chiral couplings L{sub 10} and C{sub 87} from semileptonic {tau} decays

    SciTech Connect

    Gonzalez-Alonso, Martin; Pich, Antonio; Prades, Joaquim [Departament de Fisica Teorica and IFIC, Universitat de Valencia-CSIC, Apartat de Correus 22085, E-46071 Valencia (Spain); CAFPE and Departamento de Fisica Teorica y del Cosmos, Universidad de Granada, Campus de Fuente Nueva, E-18002 Granada (Spain)

    2008-12-01

    Using recent precise hadronic {tau}-decay data on the V-A spectral function, and general properties of QCD such as analyticity, the operator product expansion, and chiral perturbation theory, we get accurate values for the QCD chiral order parameters L{sub 10}{sup r}(M{sub {rho}}) and C{sub 87}{sup r}(M{sub {rho}}). These two low-energy constants appear at order p{sup 4} and p{sup 6}, respectively, in the chiral perturbation theory expansion of the V-A correlator. At order p{sup 4} we obtain L{sub 10}{sup r}(M{sub {rho}})=-(5.22{+-}0.06)x10{sup -3}. Including in the analysis the two-loop (order p{sup 6}) contributions, we get L{sub 10}{sup r}(M{sub {rho}})=-(4.06{+-}0.39)x10{sup -3} and C{sub 87}{sup r}(M{sub {rho}})=(4.89{+-}0.19)x10{sup -3} GeV{sup -2}. In the SU(2) chiral effective theory, the corresponding low-energy coupling takes the value l{sub 5}=13.30{+-}0.11 at order p{sup 4}, and l{sub 5}=12.24{+-}0.21 at order p{sup 6}.

  11. Measurement of the branching fraction for $\\tau\\to\\eta K\

    SciTech Connect

    del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Martinelli, M.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Battaglia, M.; Brown, D.N.; Hooberman, B.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; Tanabe, T.; /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Indian Inst. Tech., Guwahati /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Paris U., VI-VII /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /INFN, Naples /Naples U. /NIKHEF, Amsterdam /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Southern Methodist U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U. /Victoria U. /Warwick U. /Wisconsin U., Madison

    2011-08-12

    The authors report on analyses of tau lepton decays {tau}{sup -} {yields} {eta}K{sup -}{nu}{sub {tau}} and {tau}{sup -} {yields} {eta}{pi}{sup -}{nu}{sub {tau}}, with {eta} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0}, using 470 fb{sup -1} of data from the BABAR experiment at PEP-II, collected at center-of-mass energies at and near the {Upsilon}(4S) resonance. They measure the branching fraction for the {tau}{sup -} {yields} {eta}K{sup -}{nu}{sub {tau}} decay mode, {Beta}({tau}{sup -} {yields} {eta}K{sup -}{nu}{sub {tau}}) = (1.42 {+-} 0.11(stat) {+-} 0.07(syst)) x 10{sup -4}, and report a 95% confidence level upper limit for the second-class current process {tau}{sup -} {yields} {eta}{pi}{sup -}{nu}{sub {tau}}, {Beta}({tau}{sup -} {yields} {eta}{pi}{sup -}{nu}{sub {tau}}) < 9.9 x 10{sup -5}.

  12. Improved measurement of absolute branching fraction of D{sub s}{sup +}{yields}{tau}{sup +}{nu}{sub {tau}}

    SciTech Connect

    Onyisi, P. U. E.; Rosner, J. L. [Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States); Alexander, J. P.; Cassel, D. G.; Duboscq, J. E.; Ehrlich, R.; Fields, L.; Galik, R. S.; Gibbons, L.; Gray, R.; Gray, S. W.; Hartill, D. L.; Heltsley, B. K.; Hertz, D.; Hunt, J. M.; Kandaswamy, J.; Kreinick, D. L.; Kuznetsov, V. E.; Ledoux, J.; Mahlke-Krueger, H. [Cornell University, Ithaca, New York 14853 (United States)] (and others)

    2009-03-01

    We have studied the leptonic decay D{sub s}{sup +}{yields}{tau}{sup +}{nu}{sub {tau}}, via the decay channel {tau}{sup +}{yields}e{sup +}{nu}{sub e}{nu}{sub {tau}}, using a sample of tagged D{sub s}{sup +} decays collected near the D{sub s}*{sup {+-}}D{sub s}{sup {+-}} peak production energy in e{sup +}e{sup -} collisions with the CLEO-c detector. We obtain B(D{sub s}{sup +}{yields}{tau}{sup +}{nu}{sub {tau}})=(5.30{+-}0.47{+-}0.22)% and determine the decay constant f{sub D{sub s}}=(252.5{+-}11.1{+-}5.2) MeV, where the first uncertainties are statistical and the second are systematic.

  13. Tau as a biomarker of neurodegenerative diseases

    PubMed Central

    Schraen-Maschke, Susanna; Sergeant, Nicolas; Dhaenens, Claire-Marie; Bombois, Stephanie; Deramecourt, Vincent; Caillet-Boudin, Marie-Laure; Pasquier, Florence; Maurage, Claude-Alain; Sablonniere, Bernard; Vanmechelen, Eugeen; Buee, Luc

    2008-01-01

    Summary The microtubule associated protein Tau is mainly expressed in neurons of the central nervous system and is crucial in axonal maintenance and axonal transport. The rationale for Tau as a biomarker of neurodegenerative diseases is that it is a major component of abnormal intraneuronal aggregates observed in numerous of these diseases named Tauopathies, including Alzheimer’s disease. The molecular diversity of Tau is very useful when analysing it in the brain or in the peripheral fluids. Immunohistochemical and biochemical characterisation of Tau aggregates in the brain allows the post-mortem classification and differential diagnosis of Tauopathies. As peripheral biomarker of Alzheimer’s disease in the cerebrospinal fluid, Tau proteins are now validated for diagnosis and predictive purposes. For the future, the detailed characterization of Tau in brain and in peripheral fluids will lead to novel promising biomarkers for differential diagnosis of dementia and monitoring of therapeutics. PMID:20477391

  14. Tau Protein and Adult Hippocampal Neurogenesis

    PubMed Central

    Fuster-Matanzo, Almudena; Llorens-Martín, María; Jurado-Arjona, Jerónimo; Avila, Jesús; Hernández, Félix

    2012-01-01

    Tau protein is a microtubule-associated protein found in the axonal compartment that stabilizes neuronal microtubules under normal physiological conditions. Tau metabolism has attracted much attention because of its role in neurodegenerative disorders called tauopathies, mainly Alzheimer disease. Here, we review recent findings suggesting that axonal outgrowth in subgranular zone during adult hippocampal neurogenesis requires a dynamic microtubule network and tau protein facilitates to maintain that dynamic cytoskeleton. Those functions are carried out in part by tau isoform with only three microtubule-binding domains (without exon 10) and by presence of hyperphosphorylated tau forms. Thus, tau is a good marker and a valuable tool to study new axons in adult neurogenesis. PMID:22787440

  15. Tau function and the Prym class

    E-print Network

    D. Korotkin; P. Zograf

    2013-02-21

    We use the formalism of the Bergman tau functions to study the geometry of moduli spaces of holomorphic quadratic differentials on complex algebraic curves. We introduce two natural tau functions and interpret them as holomorphic sections of certain line bundles on the moduli space. Analyzing the asymptotic behavior of these tau functions near the boundary of the moduli space we get two non-trivial relation in the rational Picard group of the moduli space of quadratic differential.

  16. Differential induction and spread of tau pathology in young PS19 tau transgenic mice following intracerebral injections of pathological tau from Alzheimer's disease or corticobasal degeneration brains.

    PubMed

    Boluda, Susana; Iba, Michiyo; Zhang, Bin; Raible, Kevin M; Lee, Virginia M-Y; Trojanowski, John Q

    2015-02-01

    Filamentous tau pathologies are hallmark lesions of several neurodegenerative tauopathies including Alzheimer's disease (AD) and corticobasal degeneration (CBD) which show cell type-specific and topographically distinct tau inclusions. Growing evidence supports templated transmission of tauopathies through functionally interconnected neuroanatomical pathways suggesting that different self-propagating strains of pathological tau could account for the diverse manifestations of neurodegenerative tauopathies. Here, we describe the rapid and distinct cell type-specific spread of pathological tau following intracerebral injections of CBD or AD brain extracts enriched in pathological tau (designated CBD-Tau and AD-Tau, respectively) in young human mutant P301S tau transgenic (Tg) mice (line PS19) ~6-9 months before they show onset of mutant tau transgene-induced tau pathology. At 1 month post-injection of CBD-Tau, tau inclusions developed predominantly in oligodendrocytes of the fimbria and white matter near the injection sites with infrequent intraneuronal tau aggregates. In contrast, injections of AD-Tau in young PS19 mice induced tau pathology predominantly in neuronal perikarya with little or no oligodendrocyte involvement 1 month post-injection. With longer post-injection survival intervals of up to 6 months, CBD-Tau- and AD-Tau-induced tau pathology spread to different brain regions distant from the injection sites while maintaining the cell type-specific pattern noted above. Finally, CA3 neuron loss was detected 3 months post-injection of AD-Tau but not CBD-Tau. Thus, AD-Tau and CBD-Tau represent specific pathological tau strains that spread differentially and may underlie distinct clinical and pathological features of these two tauopathies. Hence, these strains could become targets to develop disease-modifying therapies for CBD and AD. PMID:25534024

  17. TAU Performance Tools Mira Conference at Argonne National Laboratory,

    E-print Network

    Kemner, Ken

    TAU Performance Tools Mira Conference at Argonne National Laboratory, ALCF, Bldg. 240,# 1416, 10am, May 21, 2014, Argonne, IL Sameer Shende, ParaTools, Inc. and U. Oregon sameer@paratools.com http://tau.uoregon.edu/tau_mbc14.ppt Slides: /soft/perftools/tau/ppt/tau_mbc14.ppt (.pdf) #12;Acknowledgements: U. Oregon, Para

  18. Inhibition of Tau Aggregation in Cell Models of Tauopathy

    Microsoft Academic Search

    Inna Khlistunova; Marcus Pickhardt; Jacek Biernat; Yipeng Wang; Eva-Maria Mandelkow; Eckhard Mandelkow

    2007-01-01

    The pathological aggregation of tau into paired helical filaments is a hallmark of several neurodegenerative dis- eases, including Alzheimer's disease. We have generated cell models of tau aggregation in order to study mechanisms in- volving abnormal changes of tau. In the cell models the repeat domain of tau (tauRD) and some of its variants are ex- pressed in a regulated

  19. Searching for tau neutrinos with Cherenkov telescopes

    NASA Astrophysics Data System (ADS)

    Góra, D.; Bernardini, E.; Kappes, A.

    2015-02-01

    Cherenkov telescopes have the capability of detecting high energy tau neutrinos in the energy range of 1-1000 PeV by searching for very inclined showers. If a tau lepton, produced by a tau neutrino, escapes from the Earth or a mountain, it will decay and initiate a shower in the air which can be detected by an air shower fluorescence or Cherenkov telescope. In this paper, we present detailed Monte Carlo simulations of corresponding event rates for the VERITAS and two proposed Cherenkov Telescope Array sites: Meteor Crater and Yavapai Ranch, which use representative AGN neutrino flux models and take into account topographic conditions of the detector sites. The calculated neutrino sensitivities depend on the observation time and the shape of the energy spectrum, but in some cases are comparable or even better than corresponding neutrino sensitivities of the IceCube detector. For VERITAS and the considered Cherenkov Telescope Array sites the expected neutrino sensitivities are up to factor 3 higher than for the MAGIC site because of the presence of surrounding mountains.

  20. Tau regulates the subcellular localization of calmodulin

    SciTech Connect

    Barreda, Elena Gomez de [Centro de Biologia Molecular 'Severo Ochoa', CSIC/UAM, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain)] [Centro de Biologia Molecular 'Severo Ochoa', CSIC/UAM, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain); Avila, Jesus, E-mail: javila@cbm.uam.es [Centro de Biologia Molecular 'Severo Ochoa', CSIC/UAM, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain) [Centro de Biologia Molecular 'Severo Ochoa', CSIC/UAM, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain); CIBER de Enfermedades Neurodegenerativas, 28031 Madrid (Spain)

    2011-05-13

    Highlights: {yields} In this work we have tried to explain how a cytoplasmic protein could regulate a cell nuclear function. We have tested the role of a cytoplasmic protein (tau) in regulating the expression of calbindin gene. We found that calmodulin, a tau-binding protein with nuclear and cytoplasmic localization, increases its nuclear localization in the absence of tau. Since nuclear calmodulin regulates calbindin expression, a decrease in nuclear calmodulin, due to the presence of tau that retains it at the cytoplasm, results in a change in calbindin expression. -- Abstract: Lack of tau expression in neuronal cells results in a change in the expression of few genes. However, little is known about how tau regulates gene expression. Here we show that the presence of tau could alter the subcellular localization of calmodulin, a protein that could be located at the cytoplasm or in the nucleus. Nuclear calmodulin binds to co-transcription factors, regulating the expression of genes like calbindin. In this work, we have found that in neurons containing tau, a higher proportion of calmodulin is present in the cytoplasm compared with neurons lacking tau and that an increase in cytoplasmic calmodulin correlates with a higher expression of calbindin.

  1. www.tau.ac.il/cenlib/ www.tau.ac.il/cenlib/wie

    E-print Network

    Shamir, Ron

    , , . . , , . www.tau.ac.il/cenlib/ www.tau.ac.il/cenlib/wie ner/ " '-' 9:00-99:00 '-9:00 91:00 '-' 9:00-10:00 '-9:00 91:00 " www.tau.ac.il/soclib/ "- '-'-3:00 10:00 '-9:00 91:54 '-'- 3:00­ 10:00 '-9:00 91:54 - " http://medlib.tau.ac.il/heb rew

  2. Immunological characterization of epitopes on tau of Alzheimer's type and chemically modified tau

    Microsoft Academic Search

    Ricardo B. Maccioni

    1997-01-01

    The microtubule-associated protein tau is the main structural component of paired helical filaments (PHFs), which in turn are one of the major aberrant polymers found in Alzheimer's disease. Immunological studies were carried out using site-directed monoclonal and polyclonal antibodies that recognize tubulin binding epitopes on tau, to further understand the mechanisms of tau self-association into PHFs. Tau protein was subjected

  3. Anti-tau antibody reduces insoluble tau and decreases brain atrophy

    PubMed Central

    Yanamandra, Kiran; Jiang, Hong; Mahan, Thomas E; Maloney, Susan E; Wozniak, David F; Diamond, Marc I; Holtzman, David M

    2015-01-01

    Objective We previously found a strong reduction in tau pathology and insoluble tau in P301S tau transgenic mice following intracerebroventricular infusion of the anti-tau antibody HJ8.5. We sought to determine the effects of HJ8.5 in the same model following peripheral administration. Methods The primary objective was to determine if HJ8.5 administered at a dose of 50 mg kg?1 week?1 by intraperitoneal (IP) injection to 6-month-old P301S mice for 3 months would influence phospho-tau (p-tau) accumulation, tau insolubility, and neurodegeneration. Results Treatment with HJ8.5 at 50 mg/kg showed a very strong decrease in detergent-insoluble tau. Importantly, HJ8.5 significantly reduced the loss of cortical and hippocampal tissue volumes compared to control treated mice. HJ8.5 treatment reduced hippocampal CA1 cellular layer staining with the p-tau antibody AT8 and thio-S-positive tau aggregates in piriform cortex and amygdala. Moreover, mice treated with HJ8.5 at 50 mg/kg showed a decrease in motor/sensorimotor deficits compared to vehicle-treated mice. Some effects of HJ8.5, including reduction in brain atrophy, and p-tau immunostaining were also seen with a dose of 10 mg kg?1 week?1. In BV2-microglial cells, we observed significantly higher uptake of P301S tau aggregates in the presence of HJ8.5. HJ8.5 treatment also resulted in a large dose-dependent increase of tau in the plasma. Interpretation Our results indicate that systemically administered anti-tau antibody HJ8.5 significantly decreases insoluble tau, decreases brain atrophy, and improves motor/sensorimotor function in a mouse model of tauopathy. These data further support the idea that anti-tau antibodies should be further assessed as a potential treatment for tauopathies.

  4. Interaction of tau protein with model lipid membranes induces tau structural compaction and membrane disruption.

    PubMed

    Jones, Emmalee M; Dubey, Manish; Camp, Phillip J; Vernon, Briana C; Biernat, Jacek; Mandelkow, Eckhard; Majewski, Jaroslaw; Chi, Eva Y

    2012-03-27

    The misfolding and aggregation of the intrinsically disordered, microtubule-associated tau protein into neurofibrillary tangles is implicated in the pathogenesis of Alzheimer's disease. However, the mechanisms of tau aggregation and toxicity remain unknown. Recent work has shown that anionic lipid membranes can induce tau aggregation and that membrane permeabilization may serve as a pathway by which protein aggregates exert toxicity, suggesting that the plasma membrane may play dual roles in tau pathology. This prompted our investigation to assess tau's propensity to interact with membranes and to elucidate the mutually disruptive structural perturbations the interactions induce in both tau and the membrane. We show that although highly charged and soluble, the full-length tau (hTau40) is also highly surface active, selectively inserts into anionic DMPG lipid monolayers and induces membrane morphological changes. To resolve molecular-scale structural details of hTau40 associated with lipid membranes, X-ray and neutron scattering techniques are utilized. X-ray reflectivity indicates hTau40s presence underneath a DMPG monolayer and penetration into the lipid headgroups and tailgroups, whereas grazing incidence X-ray diffraction shows that hTau40 insertion disrupts lipid packing. Moreover, both air/water and DMPG lipid membrane interfaces induce the disordered hTau40 to partially adopt a more compact conformation with density similar to that of a folded protein. Neutron reflectivity shows that tau completely disrupts supported DMPG bilayers while leaving the neutral DPPC bilayer intact. Our results show that hTau40s strong interaction with anionic lipids induces tau structural compaction and membrane disruption, suggesting possible membrane-based mechanisms of tau aggregation and toxicity in neurodegenerative diseases. PMID:22401494

  5. Interaction of tau protein with model lipid membranes induces tau structural compaction and membrane disruption

    PubMed Central

    Jones, Emmalee M.; Dubey, Manish; Camp, Phillip J.; Vernon, Briana C.; Biernat, Jacek; Mandelkow, Eckhard; Majewski, Jaroslaw; Chi, Eva Y.

    2012-01-01

    The misfolding and aggregation of the intrinsically disordered, microtubule-associated tau protein into neurofibrillary tangles is implicated in the pathogenesis of Alzheimer's disease. However, the mechanisms of tau aggregation and toxicity remain unknown. Recent work has shown that lipid membrane can induce tau aggregation and that membrane permeabilization may serve as a pathway by which protein aggregates exert toxicity, suggesting that the plasma membrane may play dual roles in tau pathology. This prompted our investigation to assess tau's propensity to interact with membranes and to elucidate the mutually disruptive structural perturbations the interactions induce in both tau and the membrane. We show that although highly charged and soluble, the full-length tau (hTau40) is also highly surface active, selectively inserts into anionic DMPG lipid monolayers and induces membrane morphological changes. To resolve molecular-scale structural details of hTau40 associated with lipid membranes, X-ray and neutron scattering techniques are utilized. X-ray reflectivity indicates hTau40's presence underneath a DMPG monolayer and penetration into the lipid headgroups and tailgroups, whereas grazing incidence X-ray diffraction shows that hTau40 insertion disrupts lipid packing. Moreover, both air/water and DMPG lipid membrane interfaces induce the disordered hTau40 to partially adopt a more compact conformation with density similar to that of a folded protein. Neutron reflectivity shows that tau completely disrupts supported DMPG bilayers while leaving the neutral DPPC bilayer intact. Our results show that hTau40's strong interaction with anionic lipids induces tau structural compaction and membrane disruption, suggesting possible membrane-based mechanisms of tau aggregation and toxicity in neurodegenerative diseases. PMID:22401494

  6. The ATLAS Tau Trigger Performance during LHC Run 1 and Prospects for Run 2

    E-print Network

    Yuki Sakurai

    2014-09-09

    Triggering on hadronic tau decays is essential for a wide variety of analyses of interesting physics processes at ATLAS. The ATLAS tau trigger combines information from the tracking detectors and calorimeters to identify the signature of hadronically decaying tau leptons. In Run 2 operation expected to start in 2015, the trigger strategies will become more important than ever before. In this paper, the tau trigger performance during Run 1 is summarized and also an overview of the developments of Run 2 tau trigger strategy is presented.

  7. Measurement of exclusive branching fractions of hadronic one-prong tau decays

    Microsoft Academic Search

    M. M. Accarri; A. Adam; O. Adriani; M. Aguilar-Benitez; S. Ahlen; J. Alcaraz; A. Aloisio; G. Alverson; M. G. Alviggi; G. Ambrosi; Q. An; H. Anderhub; A. L. Anderson; V. P. Andreev; T. Angelescu; L. Antonov; D. Antreasyan; G. Alkhazov; P. Arce; A. Arefiev; T. Azemoon; T. Aziz; P. V. K. S. Baba; P. Bagnaia; J. A. Bakken; L. Baksay; R. C. Ball; S. Banerjee; K. Banicz; R. Barillère; L. Barone; A. Baschirotto; M. Basile; R. Battiston; A. Bay; F. Becattini; U. Becker; F. Behner; Gy. L. Bencze; J. Berdugo; P. Berges; B. Bertucci; B. L. Betev; M. Biasini; A. Biland; G. M. Bilei; R. Bizzarri; J. J. Blaising; G. J. Bobbink; R. Bock; A. Böhm; B. Borgia; A. Boucham; D. Bourilkov; M. Bourquin; D. Boutigny; B. Bouwens; E. Brambilla; J. G. Branson; V. Brigljevic; I. C. Brock; M. Brooks; A. Bujak; J. D. Burger; W. J. Burger; C. Burgos; J. Busenitz; A. Buytenhuijs; A. Bykov; X. D. Cai; M. Capell; G. Cara Romeo; M. Caria; G. Carlino; A. M. Cartacci; J. Casaus; R. Castello; N. Cavallo; M. Cerrada; M. Cesaroni; M. Chamizo; Y. H. Chang; U. K. Chaturvedi; M. Chemarin; A. Chen; C. Chen; G. Chen; H. F. Chen; H. S. Chen; M. Chen; G. Chiefari; C. Y. Chien; M. T. Choi; S. Chung; L. Cifarelli; F. Cindolo; C. Civinini; I. Clare; R. Clare; T. E. Coan; H. O. Cohn; G. Coignet; N. Colino; S. Costantini; F. Cotorobai; B. de la Cruz; X. T. Cui; X. Y. Cui; T. S. Dai; R. D'Alessandro; R. de Asmundis; A. Degré; K. Deiters; E. Dénes; P. Denes; F. Denotaristefani; D. Dibitonto; M. Diemoz; H. R. Dimitrov; C. Dionisi; M. Dittmar; L. Djambazov; I. Dorne; M. T. Dova; E. Drago; D. Duchesneau; F. Duhem; P. Duinker; I. Duran; S. Dutta; S. Easo; H. El Mamouni; A. Engler; F. J. Eppling; F. C. Erné; P. Extermann; R. Fabbretti; M. Fabre; S. Falciano; A. Favara; J. Fay; M. Felcini; T. Ferguson; D. Fernandez; G. Fernandez; F. Ferroni; H. Fesefeldt; E. Fiandrini; J. H. Field; F. Filthaut; P. H. Fisher; G. Forconi; L. Fredj; K. Freudenreich; M. Gailloud; Yu. Galaktionov; E. Gallo; S. N. Ganguli; P. Garcia-Abia; S. Gentile; J. Gerald; N. Gheordanescu; S. Giagu; S. Goldfarb; J. Goldstein; Z. F. Gong; E. Gonzalez; A. Gougas; D. Goujon; G. Gratta; M. W. Gruenewald; C. Gu; M. Guanziroli; V. K. Gupta; A. Gurtu; H. R. Gustafson; L. J. Gutay; A. Hasan; D. Hauschildt; J. T. He; T. Hebbeker; M. Hebert; A. Hervé; K. Hilgers; H. Hofer; H. Hoorani; S. R. Hou; G. Hu; B. Ille; M. M. Ilyas; V. Innocente; H. Janssen; B. N. Jin; L. W. Jones; P. de Jong; I. Josa-Mutuberria; A. Kasser; R. A. Khan; Yu. Kamyshkov; P. Kapinos; J. S. Kapustinsky; Y. Karyotakis; M. Kaur; S. Khokhar; M. N. Kienzle-Focacci; D. Kim; J. K. Kim; S. C. Kim; Y. G. Kim; W. W. Kinnison; A. Kirkby; D. Kirkby; J. Kirkby; S. Kirsch; W. Kittel; A. Klimentov; A. C. König; E. Koffeman; O. Kornadt; V. Koutsenko; A. Koulbardis; R. W. Kraemer; T. Kramer; V. R. Krastev; W. Krenz; H. Kuijten; K. S. Kumar; A. Kunin; P. Ladron de Guevara; G. Landi; D. Lanske; S. Lanzano; P. Laurikainen; A. Lebedev; P. Lebrun; P. Lecomte; P. Lecoq; P. Le Coultre; D. M. Lee; J. S. Lee; K. Y. Lee; I. Leedom; C. Leggett; J. M. Le Goff; R. Leiste; M. Lenti; E. Leonardi; P. Levtchenko; C. Li; E. Lieb; W. T. Lin; F. L. Linde; B. Lindemann; L. Lista; Y. Liu; W. Lohmann; E. Longo; W. Lu; Y. S. Lu; J. M. Lubbers; K. Lübelsmeyer; C. Luci; D. Luckey; L. Ludovici; L. Luminari; W. Lustermann; W. G. Ma; M. MacDermott; M. Maity; L. Malgeri; R. Malik; A. Malinin; C. Maña; S. Mangla; M. Maolinbay; P. Marchesini; A. Marin; J. P. Martin; F. Marzano; G. G. G. Massaro; K. Mazumdar; P. McBride; T. McMahon; D. McNally; S. Mele; M. Merk; L. Merola; M. Meschini; W. J. Metzger; Y. Mi; A. Mihul; G. B. Mills; Y. Mir; G. Mirabelli; J. Mnich; M. Möller; V. Monaco; B. Monteleoni; R. Morand; S. Morganti; N. E. Moulai; R. Mount; S. Müller; E. Nagy; M. Napolitano; F. Nessi-Tedaldi; H. Newman; M. A. Niaz; A. Nippe; H. Nowak; G. Organtini; R. Ostonen; D. Pandoulas; S. Paoletti; P. Paolucci; G. Pascale; G. Passaleva; S. Patricelli; T. Paul; M. Pauluzzi; C. Paus; F. Pauss; Y. J. Pei; S. Pensotti; D. Perret-Gallix; A. Pevsner; D. Piccolo; M. Pieri; J. C. Pinto; P. A. Piroué; E. Pistolesi; F. Plasil; V. Plyaskin; M. Pohl; V. Pojidaev; H. Postema; N. Produit; J. M. Qian; K. N. Qureshi; R. Raghavan; G. Rahal-Callot; P. G. Rancoita; M. Rattaggi; G. Raven; P. Razis; K. Read; M. Redaelli; D. Ren; Z. Ren; M. Rescigno; S. Reucroft; A. Ricker; S. Riemann; B. C. Riemers; K. Riles; O. Rind; H. A. Rizvi; S. Ro; A. Robohm; F. J. Rodriguez; B. P. Roe; M. Röhner; S. Röhner; L. Romero; S. Rosier-Lees; R. Rosmalen; Ph. Rosselet; W. van Rossum; S. Roth; A. Rubbia; J. A. Rubio; H. Rykaczewski; J. Salicio; E. Sanchez; G. S. Sanders; A. Santocchia; M. E. Sarakinos; S. Sarkar; G. Sartorelli; M. Sassowsky; G. Sauvage; H. Schäfer; V. Schegelsky; D. Schmitz; P. Schmitz; M. Schneegans; N. Scholz; H. Schopper; D. J. Schotanus; S. Shotkin; H. J. Schreiber; J. Shukla

    1995-01-01

    We have measured the branching fractions for the hadronic ? decays, ? ? ?Kn?° ? (0? n ?3), with the L3 detector at LEP. Multiphoton final states are analyzed using the fine-grained, high-resolution electromagnetic calorimeter. The decay channels are identified using a neural network method. The results are: BR(? ? ?K?) = (11.82 ± 0.26 ± 0.43) %, BR(? ?

  8. Tau Beta Pi: Brain Ticklers

    NSDL National Science Digital Library

    Tau Beta Pi is a national honor society for engineering students, and its quarterly Brain Ticklers online feature is a true challenge aimed at motivated individuals. In each issue, five standard questions and two bonus questions are given, which are intended to exercise peoples' problem solving skills. The problems are generally straightforward and easy to understand, but they can be extremely perplexing to solve. People who attempt the problems are encouraged to submit their answers for possible recognition in the following issue. Answers to the previous issue's problems are included when new issues are published.

  9. Search for Neutral Higgs Bosons Decaying to Tau Pairs in pp Collisions at {radical}(s)=1.96 TeV

    SciTech Connect

    Abazov, V. M.; Alexeev, G. D.; Kalinin, A. M.; Kharzheev, Y. M.; Malyshev, V. L.; Tokmenin, V. V.; Vertogradov, L. S.; Yatsunenko, Y. A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Abbott, B.; Gutierrez, P.; Hall, I.; Jain, S.; Kopal, M.; Pompos, A.; Severini, H.; Skubic, P.; Strauss, M. [University of Oklahoma, Norman, Oklahoma 73019 (United States); Abolins, M.; Benitez, J. A.; Brock, R. [Michigan State University, East Lansing, Michigan 48824 (United States)] (and others)

    2006-09-22

    A search for the production of neutral Higgs bosons {phi} decaying into {tau}{sup +}{tau}{sup -} final states in pp collisions at a center-of-mass energy of 1.96 TeV is presented. The data, corresponding to an integrated luminosity of approximately 325 pb{sup -1}, were collected by the D0 experiment at the Fermilab Tevatron Collider. Since no excess compared to the expectation from standard model processes is found, limits on the production cross section times branching ratio are set. The results are combined with those obtained from the D0 search for {phi}b(b){yields}bbb(b) and are interpreted in the minimal supersymmetric standard model.

  10. Search for neutral Higgs bosons decaying to tau pairs in pp[over ] collisions at sqrt[s]=1.96 TeV.

    PubMed

    Abazov, V M; Abbott, B; Abolins, M; Acharya, B S; Adams, M; Adams, T; Agelou, M; Agram, J-L; Ahn, S H; Ahsan, M; Alexeev, G D; Alkhazov, G; Alton, A; Alverson, G; Alves, G A; Anastasoaie, M; Andeen, T; Anderson, S; Andrieu, B; Anzelc, M S; Arnoud, Y; Arov, M; Askew, A; Asman, B; Assis Jesus, A C S; Atramentov, O; Autermann, C; Avila, C; Ay, C; Badaud, F; Baden, A; Bagby, L; Baldin, B; Bandurin, D V; Banerjee, P; Banerjee, S; Barberis, E; Bargassa, P; Baringer, P; Barnes, C; Barreto, J; Bartlett, J F; Bassler, U; Bauer, D; Bean, A; Begalli, M; Begel, M; Belanger-Champagne, C; Bellantoni, L; Bellavance, A; Benitez, J A; Beri, S B; Bernardi, G; Bernhard, R; Berntzon, L; Bertram, I; Besançon, M; Beuselinck, R; Bezzubov, V A; Bhat, P C; Bhatnagar, V; Binder, M; Biscarat, C; Black, K M; Blackler, I; Blazey, G; Blekman, F; Blessing, S; Bloch, D; Bloom, K; Blumenschein, U; Boehnlein, A; Boeriu, O; Bolton, T A; Borcherding, F; Borissov, G; Bos, K; Bose, T; Brandt, A; Brock, R; Brooijmans, G; Bross, A; Brown, D; Buchanan, N J; Buchholz, D; Buehler, M; Buescher, V; Burdin, S; Burke, S; Burnett, T H; Busato, E; Buszello, C P; Butler, J M; Calfayan, P; Calvet, S; Cammin, J; Caron, S; Carvalho, W; Casey, B C K; Cason, N M; Castilla-Valdez, H; Chakrabarti, S; Chakraborty, D; Chan, K M; Chandra, A; Chapin, D; Charles, F; Cheu, E; Chevallier, F; Cho, D K; Choi, S; Choudhary, B; Christofek, L; Claes, D; Clément, B; Clément, C; Coadou, Y; Cooke, M; Cooper, W E; Coppage, D; Corcoran, M; Cousinou, M-C; Cox, B; Crépé-Renaudin, S; Cutts, D; Cwiok, M; da Motta, H; Das, A; Das, M; Davies, B; Davies, G; Davis, G A; De, K; de Jong, P; de Jong, S J; De La Cruz-Burelo, E; De Oliveira Martins, C; Degenhardt, J D; Déliot, F; Demarteau, M; Demina, R; Demine, P; Denisov, D; Denisov, S P; Desai, S; Diehl, H T; Diesburg, M; Doidge, M; Dominguez, A; Dong, H; Dudko, L V; Duflot, L; Dugad, S R; Duperrin, A; Dyer, J; Dyshkant, A; Eads, M; Edmunds, D; Edwards, T; Ellison, J; Elmsheuser, J; Elvira, V D; Eno, S; Ermolov, P; Estrada, J; Evans, H; Evdokimov, A; Evdokimov, V N; Fatakia, S N; Feligioni, L; Ferapontov, A V; Ferbel, T; Fiedler, F; Filthaut, F; Fisher, W; Fisk, H E; Fleck, I; Ford, M; Fortner, M; Fox, H; Fu, S; Fuess, S; Gadfort, T; Galea, C F; Gallas, E; Galyaev, E; Garcia, C; Garcia-Bellido, A; Gardner, J; Gavrilov, V; Gay, A; Gay, P; Gelé, D; Gelhaus, R; Gerber, C E; Gershtein, Y; Gillberg, D; Ginther, G; Gollub, N; Gómez, B; Gounder, K; Goussiou, A; Grannis, P D; Greenlee, H; Greenwood, Z D; Gregores, E M; Grenier, G; Gris, Ph; Grivaz, J-F; Grünendahl, S; Grünewald, M W; Guo, F; Guo, J; Gutierrez, G; Gutierrez, P; Haas, A; Hadley, N J; Haefner, P; Hagopian, S; Haley, J; Hall, I; Hall, R E; Han, L; Hanagaki, K; Harder, K; Harel, A; Harrington, R; Hauptman, J M; Hauser, R; Hays, J; Hebbeker, T; Hedin, D; Hegeman, J G; Heinmiller, J M; Heinson, A P; Heintz, U; Hensel, C; Hesketh, G; Hildreth, M D; Hirosky, R; Hobbs, J D; Hoeneisen, B; Hoeth, H; Hohlfeld, M; Hong, S J; Hooper, R; Houben, P; Hu, Y; Hubacek, Z; Hynek, V; Iashvili, I; Illingworth, R; Ito, A S; Jabeen, S; Jaffré, M; Jain, S; Jakobs, K; Jarvis, C; Jenkins, A; Jesik, R; Johns, K; Johnson, C; Johnson, M; Jonckheere, A; Jonsson, P; Juste, A; Käfer, D; Kahn, S; Kajfasz, E; Kalinin, A M; Kalk, J M; Kalk, J R; Kappler, S; Karmanov, D; Kasper, J; Kasper, P; Katsanos, I; Kau, D; Kaur, R; Kehoe, R; Kermiche, S; Kesisoglou, S; Khalatyan, N; Khanov, A; Kharchilava, A; Kharzheev, Y M; Khatidze, D; Kim, H; Kim, T J; Kirby, M H; Klima, B; Kohli, J M; Konrath, J-P; Kopal, M; Korablev, V M; Kotcher, J; Kothari, B; Koubarovsky, A; Kozelov, A V; Kozminski, J; Kryemadhi, A; Krzywdzinski, S; Kuhl, T; Kumar, A; Kunori, S; Kupco, A; Kurca, T; Kvita, J; Lager, S; Lammers, S; Landsberg, G; Lazoflores, J; Le Bihan, A-C; Lebrun, P; Lee, W M; Leflat, A; Lehner, F; Lesne, V; Leveque, J; Lewis, P; Li, J; Li, Q Z; Lima, J G R; Lincoln, D; Linnemann, J; Lipaev, V V; Lipton, R; Liu, Z; Lobo, L; Lobodenko, A; Lokajicek, M; Lounis, A; Love, P; Lubatti, H J; Lynker, M; Lyon, A L; Maciel, A K A; Madaras, R J; Mättig, P; Magass, C; Magerkurth, A; Magnan, A-M; Makovec, N; Mal, P K; Malbouisson, H B; Malik, S; Malyshev, V L; Mao, H S; Maravin, Y; Martens, M; Mattingly, S E K; McCarthy, R; McCroskey, R; Meder, D; Melnitchouk, A; Mendes, A; Mendoza, L; Merkin, M; Merritt, K W; Meyer, A; Meyer, J; Michaut, M; Miettinen, H; Millet, T; Mitrevski, J; Molina, J; Mondal, N K; Monk, J; Moore, R W; Moulik, T; Muanza, G S; Mulders, M; Mulhearn, M; Mundim, L; Mutaf, Y D; Nagy, E; Naimuddin, M; Narain, M; Naumann, N A; Neal, H A; Negret, J P; Nelson, S; Neustroev, P; Noeding, C; Nomerotski, A; Novaes, S F; Nunnemann, T; O'Dell, V; O'Neil, D C; Obrant, G; Oguri, V; Oliveira, N; Oshima, N; Otec, R; Otero y Garzón, G J; Owen, M; Padley, P; Parashar, N; Park, S-J; Park, S K; Parsons, J; Partridge, R; Parua, N; Patwa, A

    2006-09-22

    A search for the production of neutral Higgs bosons Phi decaying into tau(+)tau(-) final states in pp[over ] collisions at a center-of-mass energy of 1.96 TeV is presented. The data, corresponding to an integrated luminosity of approximately 325 pb(-1), were collected by the D0 experiment at the Fermilab Tevatron Collider. Since no excess compared to the expectation from standard model processes is found, limits on the production cross section times branching ratio are set. The results are combined with those obtained from the D0 search for Phib(b[over ])-->bb[over ]b(b[over ]) and are interpreted in the minimal supersymmetric standard model. PMID:17025951

  11. Search for neutral Higgs bosons decaying to tau pairs in p anti-p collisions at s**(1/2) = 1.96-TeV

    SciTech Connect

    Abazov, V.M.; Abbott, B.; Abolins, M.; Acharya, B.S.; Adams, M.; Adams, T.; Agelou, M.; Agram, J.-L.; Ahn, S.H.; Ahsan, M.; Alexeev, G.D.; /Buenos Aires U. /Rio de

    2006-05-01

    A search for the production of neutral Higgs bosons {Phi} decaying into {tau}{sup +}{tau}{sup -} final states in p{bar p} collisions at a center-of-mass energy of 1.96 TeV is presented. The data, corresponding to an integrated luminosity of approximately 325 pb{sup -1}, were collected by the D0 experiment at the Fermilab Tevatron Collider. Since no excess compared to the expectation from standard model processes is found, limits on the production cross section times branching ratio are set. The results are combined with those obtained from the D0 search for {Phi}b({bar b}) {yields} b{bar b}b({bar b}) and are interpreted in the minimal supersymmetric standard model.

  12. Observation of nu_tau appearance in the CNGS beam with the OPERA experiment

    E-print Network

    OPERA Collaboration; N. Agafonova; A. Aleksandrov; A. Anokhina; S. Aoki; A. Ariga; T. Ariga; T. Asada; D. Bender; A. Bertolin; C. Bozza; R. Brugnera; A. Buonaura; S. Buontempo; B. Buttne; M. Chernyavsky; A. Chukanov; L. Consiglio; N. D'Ambrosio; G. De Lellis; M. De Serio; P. Del Amo Sanchez; A. Di Crescenzo; D. Di Ferdinando; N. Di Marco; S. Dmitrievski; M. Dracos; D. Duchesneau; S. Dusini; T. Dzhatdoev; J. Ebert; A. Ereditato; R. A. Fini; T. Fukuda; G. Galati; A. Garfagnini; G. Giacomelli; C. Goellnitz; J. Goldberg; Y. Gornushkin; G. Grella; M. Guler; C. Gustavino; C. Hagner; T. Hara; T. Hayakawa; A. Hollnagel; B. Hosseini; H. Ishida; K. Ishiguro; K. Jakovcic; C. Jollet; C. Kamiscioglu; M. Kamiscioglu; T. Katsuragawa; J. Kawada; H. Kawahara; J. H. Kim; S. H. Kim; N. Kitagawa; B. Klicek; K. Kodama; M. Komatsu; U. Kose; I. Kreslo; A. Lauria; J. Lenkeit; A. Ljubicic; A. Longhin; P. Loverre; M. Malenica; A. Malgin; G. Mandrioli; T. Matsuo; V. Matveev; N. Mauri; E. Medinaceli; A. Meregaglia; M. Meyer; S. Mikado; M. Miyanishi; P. Monacelli; M. C. Montesi; K. Morishima; M. T. Muciaccia; N. Naganawa; T. Naka; M. Nakamura; T. Nakano; Y. Nakatsuka; K. Niwa; S. Ogawa; N. Okateva; A. Olshevsky; T. Omura; K. Ozaki; A. Paoloni; B. D. Park; I. G. Park; L. Pasqualini; A. Pastore; L. Patrizii; H. Pessard; C. Pistillo; D. Podgrudkov; N. Polukhina; M. Pozzato; F. Pupilli; M. Roda; T. Roganova; H. Rokujo; G. Rosa; O. Ryazhskaya; O. Sato; A. Schembri; I. Shakiryanova; T. Shchedrina; A. Sheshukov; H. Shibuya; T. Shiraishi; G. Shoziyoev; S. Simone; M. Sioli; C. Sirignano; G. Sirri; M. Spinetti; L. Stanco; N. Starkov; S. M. Stellacci; M. Stipcevic; P. Strolin; S. Takahashi; M. Tenti; F. Terranova; V. Tioukov; S. Tufanli; A. Umemoto; P. Vilain; M. Vladimirov; L. Votano; J. L. Vuilleumier; G. Wilquet; B. Wonsak; C. S. Yoon; I. Yaguchi; M. Yoshimoto; S. Zemskova; A. Zghiche

    2014-08-27

    The OPERA experiment is searching for nu_mu -> nu_tau oscillations in appearance mode i.e. via the direct detection of tau leptons in nu_tau charged current interactions. The evidence of nu_mu -> nu_tau appearance has been previously reported with three nu_tau candidate events using a sub-sample of data from the 2008-2012 runs. We report here a fourth nu_tau candidate event, with the tau decaying into a hadron, found after adding the 2012 run events without any muon in the final state to the data sample. Given the number of analysed events and the low background, nu_mu -> nu_tau oscillations are established with a significance of 4.2sigma.

  13. Observation of tau neutrino appearance in the CNGS beam with the OPERA experiment

    NASA Astrophysics Data System (ADS)

    Opera Collaboration; Agafonova, N.; Aleksandrov, A.; Anokhina, A.; Aoki, S.; Ariga, A.; Ariga, T.; Asada, T.; Bender, D.; Bertolin, A.; Bozza, C.; Brugnera, R.; Buonaura, A.; Buontempo, S.; Büttner, B.; Chernyavsky, M.; Chukanov, A.; Consiglio, L.; D'Ambrosio, N.; de Lellis, G.; de Serio, M.; Del Amo Sanchez, P.; di Crescenzo, A.; di Ferdinando, D.; di Marco, N.; Dmitrievski, S.; Dracos, M.; Duchesneau, D.; Dusini, S.; Dzhatdoev, T.; Ebert, J.; Ereditato, A.; Fini, R. A.; Fukuda, T.; Galati, G.; Garfagnini, A.; Giacomelli, G.; Goellnitz, C.; Goldberg, J.; Gornushkin, Y.; Grella, G.; Guler, M.; Gustavino, C.; Hagner, C.; Hara, T.; Hayakawa, T.; Hollnagel, A.; Hosseini, B.; Ishida, H.; Ishiguro, K.; Jakovcic, K.; Jollet, C.; Kamiscioglu, C.; Kamiscioglu, M.; Katsuragawa, T.; Kawada, J.; Kawahara, H.; Kim, J. H.; Kim, S. H.; Kitagawa, N.; Klicek, B.; Kodama, K.; Komatsu, M.; Kose, U.; Kreslo, I.; Lauria, A.; Lenkeit, J.; Ljubicic, A.; Longhin, A.; Loverre, P.; Malenica, M.; Malgin, A.; Mandrioli, G.; Matsuo, T.; Matveev, V.; Mauri, N.; Medinaceli, E.; Meregaglia, A.; Meyer, M.; Mikado, S.; Miyanishi, M.; Monacelli, P.; Montesi, M. C.; Morishima, K.; Muciaccia, M. T.; Naganawa, N.; Naka, T.; Nakamura, M.; Nakano, T.; Nakatsuka, Y.; Niwa, K.; Ogawa, S.; Okateva, N.; Olshevsky, A.; Omura, T.; Ozaki, K.; Paoloni, A.; Park, B. D.; Park, I. G.; Pasqualini, L.; Pastore, A.; Patrizii, L.; Pessard, H.; Pistillo, C.; Podgrudkov, D.; Polukhina, N.; Pozzato, M.; Pupilli, F.; Roda, M.; Roganova, T.; Rokujo, H.; Rosa, G.; Ryazhskaya, O.; Sato, O.; Schembri, A.; Shakiryanova, I.; Shchedrina, T.; Sheshukov, A.; Shibuya, H.; Shiraishi, T.; Shoziyoev, G.; Simone, S.; Sioli, M.; Sirignano, C.; Sirri, G.; Spinetti, M.; Stanco, L.; Starkov, N.; Stellacci, S. M.; Stipcevic, M.; Strolin, P.; Takahashi, S.; Tenti, M.; Terranova, F.; Tioukov, V.; Tufanli, S.; Umemoto, A.; Vilain, P.; Vladimirov, M.; Votano, L.; Vuilleumier, J. L.; Wilquet, G.; Wonsak, B.; Yoon, C. S.; Yaguchi, I.; Yoshimoto, M.; Zemskova, S.; Zghiche, A.

    2014-10-01

    The OPERA experiment is searching for ? _? rArr ? _tau oscillations in appearance mode, i.e., via the direct detection of tau leptons in ? _tau charged-current interactions. The evidence of ? _? rArr ? _tau appearance has been previously reported with three ? _tau candidate events using a sub-sample of data from the 2008-2012 runs. We report here a fourth ? _tau candidate event, with the tau decaying into a hadron, found after adding the 2012 run events without any muon in the final state to the data sample. Given the number of analyzed events and the low background, ? _? rArr ? _tau oscillations are established with a significance of 4.2?.

  14. The microtubule-associated tau protein has intrinsic acetyltransferase activity

    PubMed Central

    Cohen, Todd J; Friedmann, Dave; Hwang, Andrew W; Marmorstein, Ronen; Lee, Virginia M Y

    2013-01-01

    Tau proteins are the building blocks of neurofibrillary tangles (NFTs) found in a range of neurodegenerative tauopathies, including Alzheimer's disease. Recently, we demonstrated that tau is extensively post-translationally modified by lysine acetylation, which impairs normal tau function and promotes pathological aggregation. Identifying the enzymes that mediate tau acetylation could provide targets for future therapies aimed at reducing the burden of acetylated tau. Here, we report that mammalian tau proteins possess intrinsic enzymatic activity capable of catalyzing self-acetylation. Functional mapping of tau acetyltransferase activity followed by biochemical analysis revealed that tau uses catalytic cysteine residues in the microtubule-binding domain to facilitate tau lysine acetylation, thus suggesting a mechanism similar to that employed by MYST-family acetyltransferases. The identification of tau as an acetyltransferase provides a framework to further understand tau pathogenesis and highlights tau enzymatic activity as a potential therapeutic target. PMID:23624859

  15. Methylene Blue Reduced Abnormal Tau Accumulation in P301L Tau Transgenic Mice

    PubMed Central

    Hosokawa, Masato; Arai, Tetsuaki; Masuda-Suzukake, Masami; Nonaka, Takashi; Yamashita, Makiko; Akiyama, Haruhiko; Hasegawa, Masato

    2012-01-01

    In neurodegenerative disorders, abnormally hyperphosphorylated and aggregated tau accumulates intracellularly, a mechanism which is thought to induce neuronal cell death. Methylene blue, a type of phenothiazine, has been reported to inhibit tau aggregation in vitro. However, the effect of methylene blue in vivo has remained unknown. Therefore, we examined whether methylene blue suppresses abnormal tau accumulation using P301L tau transgenic mice. At 8 to 11 months of age, these mice were orally administered methylene blue for 5 months. Subsequent results of Western blotting analysis revealed that this agent reduced detergent-insoluble phospho-tau. Methylene blue may have potential as a drug candidate for the treatment of tauopathy. PMID:23285020

  16. Ultraviolet line identifications for tau Scorpii

    NASA Technical Reports Server (NTRS)

    Rogerson, J. B., Jr.; Ewell, M. W., Jr.

    1985-01-01

    Identifications are presented for absorption features found in the ultraviolet spectrum of the BO V star, tau Scorpii. The spectrum, produced by the Copernicus satellite, covers the wavelengths from 949 to 1560 A. A correction to the first-order wavelength scale of the tau Scorpii atlas is derived.

  17. Functional studies of Alzheimer's disease tau protein.

    PubMed

    Lu, Q; Wood, J G

    1993-02-01

    In vitro assays were used to monitor and compare the kinetic behavior of bovine tubulin polymerization enhanced by tau proteins isolated from Alzheimer's disease (AD) and nondemented (ND) age-matched control brains. Tau from AD cases induced slower polymerization and a steady state turbidity value approximately 50% of that stimulated by tau from control cases. Tau from the most severe AD case was least effective at promoting polymerization. Dark-field light microscopy of the control samples revealed abundant microtubule formation and many microtubule bundles. Microtubule assembly was observed in AD samples as well, but bundling was not obvious. These results were confirmed by negative-stain electron microscopy. Morphological analysis showed that AD tau-induced microtubules were longer than control microtubules. Furthermore, our initial results suggest that the reduction of AD tau activity is correlated with neurofibrillary pathology in AD brains. Earlier reports indicated that AD tau is modified by phosphorylation (Grundke-Iqbal et al., 1986; Wood et al., 1986; Iqbal et al., 1989; Brion et al., 1991a,b; Lee et al., 1991). Our results support the hypothesis that tau modification compromises its function by altering its ability to nucleate and bundle microtubules. PMID:8426226

  18. Tau could protect DNA double helix structure

    Microsoft Academic Search

    Qian Hua; Rong-qiao He

    2003-01-01

    The hyperchromic effect has been used to detect the effect of tau on the transition of double-stranded DNA to single-stranded DNA. It was shown that tau increased the melting temperature of calf thymus DNA from 67 to 81 °C and that of plasmid from 75 to 85 °C. Kinetically, rates of increase in absorbance at 260 nm of DNA incubated

  19. Tau could protect DNA double helix structure.

    PubMed

    Hua, Qian; He, Rong-qiao

    2003-02-21

    The hyperchromic effect has been used to detect the effect of tau on the transition of double-stranded DNA to single-stranded DNA. It was shown that tau increased the melting temperature of calf thymus DNA from 67 to 81 degrees C and that of plasmid from 75 to 85 degrees C. Kinetically, rates of increase in absorbance at 260 nm of DNA incubated with tau were markedly slower than those of DNA and DNA/bovine serum albumin used as controls during thermal denaturation. In contrast, rates of decrease in the DNA absorbance with tau were faster than those of controls when samples were immediately transferred from thermal conditions to room temperature. It revealed that tau prevented DNA from thermal denaturation, and improved renaturation of DNA. Circular dichroic spectra results indicated that there were little detectable conformational changes in DNA double helix when tau was added. Furthermore, tau showed its ability to protect DNA from hydroxyl radical (.OH) attacking in vitro, implying that tau functions as a DNA-protecting molecule to the radical. PMID:12573250

  20. Status of the tau one prong problem

    SciTech Connect

    Hayes, K.G.

    1989-08-01

    The present status of the tau one prong problem is reviewed. Emphasis is placed on recent published branching fraction measurements, the status and implications of tau lifetime measurements, and measurements which constrain the sum of branching fractions to be unity. 29 refs., 10 figs., 2 tabs.

  1. Troquier et al. Active tau immunotherapy Targeting phospho-Ser422 by active Tau immunotherapy in the THY-Tau22 mouse

    E-print Network

    Paris-Sud XI, Université de

    Troquier et al. Active tau immunotherapy 1 Targeting phospho-Ser422 by active Tau immunotherapy in the THY-Tau22 mouse model: a suitable therapeutic approach Running title: Active Tau immunotherapy Laëtitia Troquier1,2 , Raphaëlle Caillierez1,2 , Sylvie Burnouf1,2 , Francisco J

  2. Large tau and tau neutrino electric dipole moments in models with vectorlike multiplets

    SciTech Connect

    Ibrahim, Tarek [Department of Physics, Faculty of Science, University of Alexandria, Alexandria (Egypt); Department of Physics, Northeastern University, Boston, Massachusetts 02115-5000 (United States); Nath, Pran [Department of Physics, Northeastern University, Boston, Massachusetts 02115-5000 (United States)

    2010-02-01

    It is shown that the electric dipole moment of the {tau} lepton several orders of magnitude larger than predicted by the standard model can be generated from mixings in models with vectorlike mutiplets. The electric dipole moment (EDM) of the {tau} lepton arises from loops involving the exchange of the W, the charginos, the neutralinos, the sleptons, the mirror leptons, and the mirror sleptons. The EDM of the Dirac {tau} neutrino is also computed from loops involving the exchange of the W, the charginos, the mirror leptons, and the mirror sleptons. A numerical analysis is presented, and it is shown that the EDMs of the {tau} lepton and the {tau} neutrino which lie just a couple of orders of magnitude below the sensitivity of the current experiment can be achieved. Thus the predictions of the model are testable in an improved experiment on the EDM of the {tau} and the {tau} neutrino.

  3. Large Tau and Tau Neutrino Electric Dipole Moments in Models with Vector Like Multiplets

    E-print Network

    Tarek Ibrahim; Pran Nath

    2010-01-01

    It is shown that the electric dipole moment of the tau lepton several orders of magnitude larger than predicted by the standard model can be generated from mixings in models with vector like mutiplets. The EDM of the tau lepton arises from loops involving the exchange of the W, the charginos, the neutralinos, the sleptons, the mirror leptons, and the mirror sleptons. The EDM of the Dirac tau neutrino is also computed from loops involving the exhange of the W, the charginos, the mirror leptons and mirror sleptons. A numerical analysis is presented and it is shown that the EDMs of the tau lepton and of the tau neutrino which lie just a couple of orders of magnitude below the sensitivity of the current experiment can be achieved. Thus the predictions of the model are testable in improved experiment on the EDM of the tau and of the tau neutrino.

  4. Tau immunotherapy modulates both pathological tau and upstream amyloid pathology in an Alzheimer's disease mouse model.

    PubMed

    Castillo-Carranza, Diana L; Guerrero-Muñoz, Marcos J; Sengupta, Urmi; Hernandez, Caterina; Barrett, Alan D T; Dineley, Kelly; Kayed, Rakez

    2015-03-25

    In Alzheimer's disease (AD), the pathological accumulation of tau appears to be a downstream effect of amyloid ? protein (A?). However, the relationship between these two proteins and memory loss is unclear. In this study, we evaluated the specific removal of pathological tau oligomers in aged Tg2576 mice by passive immunotherapy using tau oligomer-specific monoclonal antibody. Removal of tau oligomers reversed memory deficits and accelerated plaque deposition in the brain. Surprisingly, A?*56 levels decreased, suggesting a link between tau and A? oligomers in the promotion of cognitive decline. The results suggest that tau oligomerization is not only a consequence of A? pathology but also a critical mediator of the toxic effects observed afterward in AD. Overall, these findings support the potential of tau oligomers as a therapeutic target for AD. PMID:25810517

  5. Tau phosphorylation affects its axonal transport and degradation

    PubMed Central

    Rodríguez-Martín, Teresa; Cuchillo-Ibáñez, Inmaculada; Noble, Wendy; Nyenya, Fanon; Anderton, Brian H.; Hanger, Diane P.

    2013-01-01

    Phosphorylated forms of microtubule-associated protein tau accumulate in neurofibrillary tangles in Alzheimer's disease. To investigate the effects of specific phosphorylated tau residues on its function, wild type or phosphomutant tau was expressed in cells. Elevated tau phosphorylation decreased its microtubule binding and bundling, and increased the number of motile tau particles, without affecting axonal transport kinetics. In contrast, reducing tau phosphorylation enhanced the amount of tau bound to microtubules and inhibited axonal transport of tau. To determine whether differential tau clearance is responsible for the increase in phosphomimic tau, we inhibited autophagy in neurons which resulted in a 3-fold accumulation of phosphomimic tau compared with wild type tau, and endogenous tau was unaffected. In autophagy-deficient mouse embryonic fibroblasts, but not in neurons, proteasomal degradation of phosphomutant tau was also reduced compared with wild type tau. Therefore, autophagic and proteasomal pathways are involved in tau degradation, with autophagy appearing to be the primary route for clearing phosphorylated tau in neurons. Defective autophagy might contribute to the accumulaton of tau in neurodegenerative diseases. PMID:23601672

  6. Lepton-flavor-violating Higgs decay $h \\to \\mu\\tau$ and muon anomalous magnetic moment in a general two Higgs doublet model

    E-print Network

    Omura, Yuji; Tobe, Kazuhiro

    2015-01-01

    A two Higgs doublet model (2HDM) is one of the minimal extensions of the Standard Model (SM), and it is well-known that the general setup predicts the flavor-violating phenomena, mediated by neutral Higgs interactions. Recently the CMS collaboration has reported an excess of the lepton-flavor-violating Higgs decay in $h \\rightarrow \\mu \\tau$ channel with a significance of 2.5 $ \\sigma$. We investigate the CMS excess in a general 2HDM with tree-level Flavor Changing Neutral Currents (FCNCs), and discuss its impact on the other physical observations. Especially, we see that the FCNCs relevant to the excess can enhance the neutral Higgs contributions to the muon anomalous magnetic moment, and can resolve the discrepancy between the measured value and the SM prediction. We also find that the couplings to be consistent with the muon g-2 anomaly as well as the CMS excess in $h\\rightarrow \\mu\\tau$ predict the sizable rate of $ \\tau \\rightarrow \\mu \\gamma$, which is within the reach of future B factory.

  7. Simulated Cytoskeletal Collapse via Tau Degradation

    PubMed Central

    Sendek, Austin; Fuller, Henry R.; Hayre, N. Robert; Singh, Rajiv R. P.; Cox, Daniel L.

    2014-01-01

    We present a coarse-grained two dimensional mechanical model for the microtubule-tau bundles in neuronal axons in which we remove taus, as can happen in various neurodegenerative conditions such as Alzheimers disease, tauopathies, and chronic traumatic encephalopathy. Our simplified model includes (i) taus modeled as entropic springs between microtubules, (ii) removal of taus from the bundles due to phosphorylation, and (iii) a possible depletion force between microtubules due to these dissociated phosphorylated taus. We equilibrate upon tau removal using steepest descent relaxation. In the absence of the depletion force, the transverse rigidity to radial compression of the bundles falls to zero at about 60% tau occupancy, in agreement with standard percolation theory results. However, with the attractive depletion force, spring removal leads to a first order collapse of the bundles over a wide range of tau occupancies for physiologically realizable conditions. While our simplest calculations assume a constant concentration of microtubule intercalants to mediate the depletion force, including a dependence that is linear in the detached taus yields the same collapse. Applying percolation theory to removal of taus at microtubule tips, which are likely to be the protective sites against dynamic instability, we argue that the microtubule instability can only obtain at low tau occupancy, from 0.06–0.30 depending upon the tau coordination at the microtubule tips. Hence, the collapse we discover is likely to be more robust over a wide range of tau occupancies than the dynamic instability. We suggest in vitro tests of our predicted collapse. PMID:25162587

  8. Simulated Cytoskeletal Collapse via Tau Degradation

    E-print Network

    Austin Sendek; Henry R. Fuller; N. Robert Hayre; Rajiv R. P. Singh; Daniel L. Cox

    2014-09-29

    We present a coarse-grained two dimensional mechanical model for the microtubule-tau bundles in neuronal axons in which we remove taus, as can happen in various neurodegenerative conditions such as Alzheimer's disease, tauopathies, and chronic traumatic encephalopathy. Our simplified model includes (i) taus modeled as entropic springs between microtubules, (ii) removal of taus from the bundles due to phosphorylation, and (iii) a possible depletion force between microtubules due to these dissociated phosphorylated taus. We equilibrate upon tau removal using steepest descent relaxation. In the absence of the depletion force, the transverse rigidity to radial compression of the bundle falls to zero at about 60% tau occupancy, in agreement with standard percolation theory results. However, with the attractive depletion force, spring removal leads to a first order collapse of the bundles over a wide range of tau occupancies for physiologically realizable conditions. While our simplest calculations assume a constant concentration of microtubule intercalants to mediate the depletion force, including a dependence that is linear in the detached taus yields the same collapse. Applying percolation theory to removal of taus at microtubule tips, which are likely to be the protective sites against dynamic instability, we argue that the microtubule instability can only obtain at low tau occupancy, from 0.06-0.30 depending upon the tau coordination at the microtubule tips. Hence, the collapse we discover is likely to be more robust over a wide range of tau occupancies than the dynamic instability. We suggest in vitro tests of our predicted collapse.

  9. Proteopathic tau seeding predicts tauopathy in vivo.

    PubMed

    Holmes, Brandon B; Furman, Jennifer L; Mahan, Thomas E; Yamasaki, Tritia R; Mirbaha, Hilda; Eades, William C; Belaygorod, Larisa; Cairns, Nigel J; Holtzman, David M; Diamond, Marc I

    2014-10-14

    Transcellular propagation of protein aggregates, or proteopathic seeds, may drive the progression of neurodegenerative diseases in a prion-like manner. In tauopathies such as Alzheimer's disease, this model predicts that tau seeds propagate pathology through the brain via cell-cell transfer in neural networks. The critical role of tau seeding activity is untested, however. It is unknown whether seeding anticipates and correlates with subsequent development of pathology as predicted for a causal agent. One major limitation has been the lack of a robust assay to measure proteopathic seeding activity in biological specimens. We engineered an ultrasensitive, specific, and facile FRET-based flow cytometry biosensor assay based on expression of tau or synuclein fusions to CFP and YFP, and confirmed its sensitivity and specificity to tau (? 300 fM) and synuclein (? 300 pM) fibrils. This assay readily discriminates Alzheimer's disease vs. Huntington's disease and aged control brains. We then carried out a detailed time-course study in P301S tauopathy mice, comparing seeding activity versus histological markers of tau pathology, including MC1, AT8, PG5, and Thioflavin S. We detected robust seeding activity at 1.5 mo, >1 mo before the earliest histopathological stain. Proteopathic tau seeding is thus an early and robust marker of tauopathy, suggesting a proximal role for tau seeds in neurodegeneration. PMID:25261551

  10. Tau pathology induces intraneuronal cholesterol accumulation.

    PubMed

    Glöckner, Frauke; Ohm, Thomas G

    2014-09-01

    Epidemiologic and experimental data suggest the involvement of cholesterol metabolism in the development and progression of Alzheimer disease and Niemann-Pick type C disease, but not of frontotemporal dementias. In these 3 neurodegenerative diseases, however, protein tau hyperphosphorylation and aggregation into neurofibrillary tangles are observed. To elucidate the relationship between cholesterol and tau, we compared sterol levels of neurons burdened with neurofibrillary tangles with those of their unaffected neighbors using semiquantitative filipin fluorescence microscopy in mice expressing P301L mutant human tau (a well-described model of FTDP-17) and in P301L transgenic mice lacking apolipoprotein E (the major cholesterol transporter in the brain). Cellular unesterified cholesterol was higher in neurons affected by tau pathology irrespective of apolipoprotein E deficiency. This argues for an impact of tau pathology on cellular cholesterol homeostasis. We suggest that there is a bidirectional mode of action: Disturbances in cellular cholesterol metabolism may promote tau pathology, but tau pathology may also alter neuronal cholesterol homeostasis; once it is established, a vicious cycle may promote neurofibrillary tangle formation. PMID:25101701

  11. Search for Lepton Flavor Violating Decays $\\tau^\\pm \\to \\ell^\\pm{\\pi^0}, \\ell^\\pm\\eta, \\ell^\\pm{\\eta^\\prime}$

    SciTech Connect

    Aubert, B.

    2006-11-15

    A search for lepton flavor violating decays of the {tau} lepton to a lighter mass lepton and a pseudoscalar meson has been performed using 339 fb{sup -1} of e{sup +}e{sup -} annihilation data collected at a center-of-mass energy near 10.58GeV by the BABAR detector at the SLAC PEP-II storage ring. No evidence of signal has been found, and upper limits on the branching fractions are set at 10{sup -7} level.

  12. Determination of the Higgs CP mixing angle in the tau decay channels at the LHC including the Drell-Yan background

    E-print Network

    Stefan Berge; Werner Bernreuther; Sebastian Kirchner

    2014-12-10

    We investigate how precisely the CP nature of the 125 GeV Higgs boson resonance h can be unraveled at the LHC in its decays to tau pairs. We use a method which allows to determine the scalar-pseudoscalar Higgs mixing angle in this decay mode. This mixing angle can be extracted from the distribution of a signed angle, which we analyze for the major charged-prong tau decays. For definiteness, we consider Higgs-boson production by gluon fusion at NLO QCD. We take into account also the irreducible background from Drell-Yan production at NLO QCD. We compute, for the signal and background reactions, angular and energy correlations of the charged prongs and analyze which type of cuts suppress the Drell-Yan background. An important feature of this background is that its contribution to the distribution of our observable is a flat line, also at NLO QCD. By separating the Drell-Yan events into two different sets, two different non-trivial distributions are obtained. Based on this observation we propose to use these sets for calibation purposes. By Monte Carlo simulation we study also the effect of measurement uncertainties on this distribution. We estimate that the Higgs mixing angle can be determined with our method to a precision of 14 degree (5 degree) at the high luminosity LHC (14 TeV) with an integrated luminosity of 500 inverse fb (3 inverse ab).

  13. Intracerebral injection of preformed synthetic tau fibrils initiates widespread tauopathy and neuronal loss in the brains of tau transgenic mice

    PubMed Central

    Peeraer, Eve; Bottelbergs, Astrid; Van Kolen, Kristof; Stancu, Ilie-Cosmin; Vasconcelos, Bruno; Mahieu, Michel; Duytschaever, Hilde; Ver Donck, Luc; Torremans, An; Sluydts, Ellen; Van Acker, Nathalie; Kemp, John A.; Mercken, Marc; Brunden, Kurt R.; Trojanowski, John Q.; Dewachter, Ilse; Lee, Virginia M.Y.; Moechars, Diederik

    2015-01-01

    Neurofibrillary tangles composed of hyperphosphorylated fibrillized tau are found in numerous tauopathies including Alzheimer's disease. Increasing evidence suggests that tau pathology can be transmitted from cell-to-cell; however the mechanisms involved in the initiation of tau fibrillization and spreading of disease linked to progression of tau pathology are poorly understood. We show here that intracerebral injections of preformed synthetic tau fibrils into the hippocampus or frontal cortex of young tau transgenic mice expressing mutant human P301L tau induces tau hyperphosphorylation and aggregation around the site of injection, as well as a time-dependent propagation of tau pathology to interconnected brain areas distant from the injection site. Furthermore, we show that the tau pathology as a consequence of injection of tau preformed fibrils into the hippocampus induces selective loss of CA1 neurons. Together, our data confirm previous studies on the seeded induction and the spreading of tau pathology in a different tau transgenic mouse model and reveals neuronal loss associated with seeded tau pathology in tau transgenic mouse brain. These results further validate the utility of the tau seeding model in studying disease transmission, and provide a more complete in vivo tauopathy model with associated neurodegeneration which can be used to investigate the mechanisms involved in tau aggregation and spreading, as well as aid in the search for disease modifying treatments for Alzheimer's disease and related tauopathies. PMID:25220759

  14. Lepton flavor violating Higgs bosons and {tau}{yields}{mu}{gamma}

    SciTech Connect

    Davidson, Sacha; Grenier, Gerald [IPNL, Universite de Lyon, Universite Lyon 1, CNRS/IN2P3, 4 rue E. Fermi 69622 Villeurbanne cedex (France)

    2010-05-01

    We update phenomenological constraints on a two Higgs doublet model with lepton flavor nonconserving Yukawa couplings. We review that tan{beta} is ambiguous in such 'type III' models, and define it from the {tau} Yukawa coupling. The neutral scalars {phi} could be searched for at hadron colliders in {phi}{yields}{tau}{mu} and are constrained by the rare decay {tau}{yields}{mu}{gamma}. The Feynman diagrams for the collider process, with Higgs production via gluon fusion, are similar to the two-loop ''Barr-Zee'' diagrams, which contribute to {tau}{yields}{mu}{gamma}. Some ''tuning'' is required to obtain a collider cross section of order the standard model expectation for {sigma}(gg{yields}h{sub SM{yields}{tau}}{sup +{tau}-}), while agreeing with the current bound from {tau}{yields}{mu}{gamma}.

  15. Reconstruction of {tau}-tilde{sub 1} mass at the LHC

    SciTech Connect

    Djilkibaev, R. M.; Konoplich, R. V., E-mail: rk60@nyu.edu [New York University, Department of Physics (United States)

    2011-01-15

    The cascade mass reconstruction approach was used for mass reconstruction of the lightest {tau}-tilde produced at the LHC in the cascade decay g-tilde {yields} b-tildeb {yields} {chi}-tilde{sub 2}{sup 0}bb {yields} {tau}-tilde{sub 1}{tau}bb {yields} {chi}-tilde{sub 1}{sup 0}{tau}{tau}bb. The {tau}-tilde{sub 1} mass was reconstructed assuming that masses of gluino, bottom squark, and two lightest neutralinos were reconstructed in advance. SUSY data sample sets for the SU(3) model point containing 160k events each were generated which corresponded to an integrated luminosity of about 8 fb{sup -1} at 14 TeV. These events were passed through the AcerDET detector simulator, which parametrized the response of a generic LHC detector. The mass of the {tau}-tilde{sub 1} was reconstructed with a precision of about 20% on average.

  16. Exclusive Branching-Fraction Measurements of Semileptonic tau Decays into Three Charged Hadrons, into phipi-nutau, and into phiK-nutau

    Microsoft Academic Search

    B. Aubert; M. Bona; D. Boutigny; F. Couderc; Y. Karyotakis; J. P. Lees; V. Poireau; V. Tisserand; A. Zghiche; E. Grauges; A. Palano; J. C. Chen; N. D. Qi; G. Rong; P. Wang; Y. S. Zhu; G. Eigen; I. Ofte; B. Stugu; G. S. Abrams; M. Battaglia; D. N. Brown; J. Button-Shafer; R. N. Cahn; E. Charles; M. S. Gill; Y. Groysman; R. G. Jacobsen; J. A. Kadyk; L. T. Kerth; Yu. G. Kolomensky; G. Kukartsev; D. Lopes Pegna; G. Lynch; L. M. Mir; T. J. Orimoto; M. Pripstein; N. A. Roe; M. T. Ronan; W. A. Wenzel; P. Del Amo Sanchez; M. Barrett; K. E. Ford; T. J. Harrison; A. J. Hart; C. M. Hawkes; A. T. Watson; T. Held; H. Koch; B. Lewandowski; M. Pelizaeus; K. Peters; T. Schroeder; M. Steinke; J. T. Boyd; J. P. Burke; W. N. Cottingham; D. Walker; D. J. Asgeirsson; T. Cuhadar-Donszelmann; B. G. Fulsom; C. Hearty; N. S. Knecht; T. S. Mattison; J. A. McKenna; A. Khan; P. Kyberd; M. Saleem; D. J. Sherwood; L. Teodorescu; V. E. Blinov; A. D. Bukin; V. P. Druzhinin; V. B. Golubev; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; E. P. Solodov; K. Yu Todyshev; D. S. Best; M. Bondioli; M. Bruinsma; M. Chao; S. Curry; I. Eschrich; D. Kirkby; A. J. Lankford; P. Lund; M. Mandelkern; W. Roethel; D. P. Stoker; S. Abachi; C. Buchanan; S. D. Foulkes; J. W. Gary; O. Long; B. C. Shen; K. Wang; L. Zhang; H. K. Hadavand; E. J. Hill; H. P. Paar; S. Rahatlou; V. Sharma; J. W. Berryhill; C. Campagnari; A. Cunha; B. Dahmes; T. M. Hong; D. Kovalskyi; J. D. Richman; T. W. Beck; A. M. Eisner; C. J. Flacco; C. A. Heusch; J. Kroseberg; W. S. Lockman; G. Nesom; T. Schalk; B. A. Schumm; A. Seiden; P. Spradlin; D. C. Williams; M. G. Wilson; J. Albert; E. Chen; C. H. Cheng; A. Dvoretskii; F. Fang; D. G. Hitlin; I. Narsky; T. Piatenko; F. C. Porter; G. Mancinelli; B. T. Meadows; K. Mishra; M. D. Sokoloff; F. Blanc; P. C. Bloom; S. Chen; W. T. Ford; J. F. Hirschauer; A. Kreisel; M. Nagel; U. Nauenberg; A. Olivas; W. O. Ruddick; J. G. Smith; K. A. Ulmer; S. R. Wagner; J. Zhang; A. Chen; E. A. Eckhart; A. Soffer; W. H. Toki; R. J. Wilson; F. Winklmeier; Q. Zeng; D. D. Altenburg; E. Feltresi; A. Hauke; H. Jasper; J. Merkel; A. Petzold; B. Spaan; T. Brandt; V. Klose; H. M. Lacker; W. F. Mader; R. Nogowski; J. Schubert; K. R. Schubert; R. Schwierz; J. E. Sundermann; A. Volk; D. Bernard; G. R. Bonneaud; E. Latour; Ch. Thiebaux; M. Verderi; P. J. Clark; W. Gradl; F. Muheim; S. Playfer; A. I. Robertson; Y. Xie; M. Andreotti; D. Bettoni; C. Bozzi; R. Calabrese; G. Cibinetto; E. Luppi; M. Negrini; A. Petrella; L. Piemontese; E. Prencipe; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; G. Finocchiaro; S. Pacetti; P. Patteri; I. M. Peruzzi; M. Piccolo; M. Rama; A. Zallo; A. Buzzo; R. Contri; M. Lo Vetere; M. M. Macri; M. R. Monge; S. Passaggio; C. Patrignani; E. Robutti; A. Santroni; S. Tosi; G. Brandenburg; K. S. Chaisanguanthum; C. L. Lee; M. Morii; J. Wu; R. S. Dubitzky; J. Marks; S. Schenk; U. Uwer; D. J. Bard; W. Bhimji; D. A. Bowerman; P. D. Dauncey; U. Egede; R. L. Flack; J. A. Nash; M. B. Nikolich; W. Panduro Vazquez; P. K. Behera; X. Chai; M. J. Charles; U. Mallik; N. T. Meyer; V. Ziegler; J. Cochran; H. B. Crawley; L. Dong; V. Eyges; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; A. V. Gritsan; A. G. Denig; M. Fritsch; G. Schott; N. Arnaud; M. Davier; G. Grosdidier; A. Höcker; V. Lepeltier; F. Le Diberder; A. M. Lutz; A. Oyanguren; S. Pruvot; S. Rodier; P. Roudeau; M. H. Schune; J. Serrano; A. Stocchi; W. F. Wang; G. Wormser; D. J. Lange; D. M. Wright; C. A. Chavez; I. J. Forster; J. R. Fry; E. Gabathuler; R. Gamet; K. A. George; D. E. Hutchcroft; D. J. Payne; K. C. Schofield; C. Touramanis; A. J. Bevan; C. K. Clarke; F. di Lodovico; W. Menges; R. Sacco; G. Cowan; H. U. Flaecher; D. A. Hopkins; P. D. Jackson; T. R. McMahon; F. Salvatore; A. C. Wren; C. L. Davis; J. Allison; N. R. Barlow; R. J. Barlow; Y. M. Chia; C. L. Edgar; G. D. Lafferty; M. T. Naisbit; J. C. Williams; J. I. Yi; C. Chen; W. D. Hulsbergen; A. Jawahery; C. K. Lae; D. A. Roberts; G. Simi; G. Blaylock; C. Dallapiccola; S. S. Hertzbach; X. Li; T. B. Moore; S. Saremi; H. Staengle; R. Cowan; G. Sciolla; S. J. Sekula; M. Spitznagel; F. Taylor; R. K. Yamamoto; H. Kim; S. E. McLachlin; P. M. Patel; S. H. Robertson; A. Lazzaro; V. Lombardo; F. Palombo; J. M. Bauer; L. Cremaldi; V. Eschenburg; R. Godang; R. Kroeger; D. A. Sanders; D. J. Summers; H. W. Zhao; S. Brunet; D. Côté; M. Simard; P. Taras; F. B. Viaud; H. Nicholson; N. Cavallo; G. de Nardo; F. Fabozzi; C. Gatto; L. Lista; D. Monorchio; P. Paolucci; D. Piccolo; C. Sciacca; M. A. Baak; G. Raven; H. L. Snoek; C. P. Jessop; J. M. Losecco; G. Benelli; L. A. Corwin; K. K. Gan; K. Honscheid; D. Hufnagel; H. Kagan; R. Kass; A. M. Rahimi; J. J. Regensburger; R. Ter-Antonyan; Q. K. Wong; N. L. Blount; J. Brau; R. Frey; O. Igonkina; J. A. Kolb; M. Lu; C. T. Potter; R. Rahmat

    2008-01-01

    Using a data sample corresponding to an integrated luminosity of 342fb-1 collected with the BABAR detector at the SLAC PEP-II electron-positron storage ring operating at a center-of-mass energy near 10.58 GeV, we measure B(tau--->pi-pi-pi+nutau(ex.KS0))=(8.83±0.01±0.13)%, B(tau--->K-pi-pi+nutau(ex.KS0))=(0.273±0.002±0.009)%, B(tau--->K-pi-K+nutau)=(0.1346±0.0010±0.0036)%, and B(tau--->K-K-K+nutau)=(1.58±0.13±0.12)×10-5, where the uncertainties are statistical and systematic, respectively. These include significant improvements over previous measurements and a first measurement of B(tau--->K-K-K+nutau) in

  17. Measurement of the W -> tau nu(tau) cross section in pp collisions at root s=7 TeV with the ATLAS experiment

    SciTech Connect

    Aad, G.; Abbott, B.; Abdallah, J.; Abdelalim, A. A.; Abdesselam, A.; Abdinov, O.; Abi, B.; Abolins, M.; Abramowicz, H.; Abreu, H.; Acerbi, E.; Acharya, B. S.; Adams, D. L.; Addy, T. N.; Adelman, J.; Aderholz, M.; Adomeit, S.; Adragna, P.; Adye, T.; et al.

    2012-01-05

    The cross section for the production of W bosons with subsequent decay W {yields} {tau}{nu}{tau} is measured with the ATLAS detector at the LHC. The analysis is based on a data sample that was recorded in 2010 at a proton-proton center-of-mass energy of {radical}s = 7 TeV and corresponds to an integrated luminosity of 34 pb{sup -1}. The cross section is measured in a region of high detector acceptance and then extrapolated to the full phase space. The product of the total W production cross section and the W {yields} {tau}{nu}{tau} branching ratio is measured to be {sigma}{sub W{yields}{tau}{nu}{tau}}{sup tot} = 11.1 {+-} 0.3(stat) {+-} 1.7(syst) {+-} 0.4(lumi) nb.

  18. Tau-Coupling Revisited 103 When Is Behavioral Data

    E-print Network

    Jegelka, Stefanie

    Tau-Coupling Revisited 103 When Is Behavioral Data Evidence for a Control Theory? Tau is met in studies that claim to provide evidence for the tau- coupling theory. This theory proposes that moving targets are intercepted at a specified goal zone by maintaining a constant ratio between the tau

  19. Tau Lepton Flavor Violation Results from BaBar

    SciTech Connect

    Cervelli, A.; /INFN, Pisa

    2012-04-03

    We report the recent results obtained by BABAR collaboration in lepton flavor violation (LFV) searches in the tau lepton sector, presenting 16 new results from {tau}{sub LLL} (L = e, {mu}), {tau} {yields} LV{sup 0} V{sup 0} = {rho}{sup 0}, K*{sup 0}, K*{sup -0}, {Phi} and {tau} {yields} lK{sub S}.

  20. Tau and muon lepton flavor violations in the littlest Higgs model with T parity

    SciTech Connect

    Goto, Toru [KEK Theory Center, Institute of Particle and Nuclear Studies, KEK, Tsukuba, Ibaraki 305-0801 (Japan); Okada, Yasuhiro; Yamamoto, Yasuhiro [KEK Theory Center, Institute of Particle and Nuclear Studies, KEK, Tsukuba, Ibaraki 305-0801 (Japan); Department of Particle and Nuclear Physics, The Graduate University for Advanced Studies (Sokendai), Tsukuba, Ibaraki 305-0801 (Japan)

    2011-03-01

    Lepton flavor violation in {tau} and {mu} processes is studied in the littlest Higgs model with T parity. We consider various asymmetries defined in polarized {tau} and {mu} decays. Correlations among branching ratios and asymmetries are shown in the following lepton flavor violation processes: {mu}{sup +}{yields}e{sup +}{gamma}, {mu}{sup +}{yields}e{sup +}e{sup +}e{sup -}, {mu}{sup -}A{yields}e{sup -}A (A=Al, Ti, Au, and Pb), {tau}{sup +}{yields}{mu}{sup +}{gamma}, {tau}{sup +}{yields}{mu}{sup +}{mu}{sup +}{mu}{sup -}, {tau}{sup +}{yields}{mu}{sup +}e{sup +}e{sup -}, {tau}{sup +}{yields}{mu}{sup +}P (P={pi}{sup 0}, {eta} and {eta}{sup '}), {tau}{sup +}{yields}{mu}{sup +}V (V={rho}{sup 0}, {omega} and {phi}), {tau}{sup +}{yields}e{sup +}{gamma}, {tau}{sup +}{yields}e{sup +}e{sup +}e{sup -}, {tau}{sup +}{yields}e{sup +}{mu}{sup +}{mu}{sup -}, {tau}{sup +}{yields}e{sup +}P, {tau}{sup +}{yields}e{sup +}V, {tau}{sup +}{yields}{mu}{sup +}{mu}{sup +}e{sup -} and {tau}{sup +}{yields}e{sup +}e{sup +}{mu}{sup -}. It is shown that large parity asymmetries and time-reversal asymmetries are allowed in {mu}{sup +}{yields}e{sup +}e{sup +}e{sup -}. For {tau} lepton flavor violation processes, sizable asymmetries are possible reflecting characteristic chirality structure of lepton flavor violating interactions in this model.

  1. Tau tagging at Atlas and CMS

    E-print Network

    Giuseppe Bagliesi

    2007-07-06

    The tau identification and reconstruction algorithms developed for the LHC experiments Atlas and CMS are presented. Reconstruction methods suitable for use at High Level Trigger and off-line are described in detail

  2. Search for B ->tau nu and B -> K nu(nu)over-bar

    E-print Network

    Ammar, Raymond G.; Bean, Alice; Besson, David Zeke; Davis, Robin E. P.; Kwak, Nowhan; Zhao, X.

    2001-04-01

    We report results of a search for B --> tau nu in a sample of 9.7 x 10(6) charged B meson decays. We exclusively reconstruct the companion B decay to suppress background. We set an upper limit on the branching fraction B(B --> tau nu) < 8.4 X 10...

  3. Mechanisms of tau-induced neurodegeneration

    PubMed Central

    Liu, Fei; Gong, Cheng-Xin; Alonso, Alejandra del C.; Grundke-Iqbal, Inge

    2010-01-01

    Alzheimer disease (AD) and related tauopathies are histopathologically characterized by a specific type of slow and progressive neurodegeneration, which involves the abnormal hyperphosphorylation of the microtubule associated protein (MAP) tau. This hallmark, called neurofibrillary degeneration, is seen as neurofibrillary tangles, neuropil threads, and dystrophic neurites and is apparently required for the clinical expression of AD, and in related tauopathies it leads to dementia in the absence of amyloid plaques. While normal tau promotes assembly and stabilizes microtubules, the non-fibrillized, abnormally hyperphosphorylated tau sequesters normal tau, MAP1 and MAP2, and disrupts microtubules. The abnormal hyperphosphorylation of tau, which can be generated by catalysis of several different combinations of protein kinases, also promotes its misfolding, decrease in turnover, and self-assembly into tangles of paired helical and or straight filaments. Some of the abnormally hyperphosphorylated tau ends up both amino and C-terminally truncated. Disruption of microtubules by the non-fibrillized abnormally hyperphosphorylated tau as well as its aggregation as neurofibrillary tangles probably impair axoplasmic flow and lead to slow progressive retrograde degeneration and loss of connectivity of the affected neurons. Among the phosphatases, which regulate the phosphorylation of tau, protein phosphatase-2A (PP2A), the activity of which is down-regulated in AD brain, is by far the major enzyme. The two inhibitors of PP-2A, I1PP2A and I2PP2A, which are overexpressed in AD, might be responsible for the decreased phosphatase activity. AD is multifactorial and heterogeneous and involves more than one etiopathogenic mechanism. PMID:19184068

  4. Curr Alzheimer Res . Author manuscript Early Tau pathology involving the septo-hippocampal pathway in a Tau

    E-print Network

    Paris-Sud XI, Université de

    Curr Alzheimer Res . Author manuscript Page /1 7 Early Tau pathology involving the septo-hippocampal pathway in a Tau transgenic model: relevance to Alzheimers disease' Karim Belarbi , Katharina Schindowski. In the present study, we aimed to further investigate Tau aggregation' in cholinergic systems, in a Tau

  5. Abnormally phosphorylated tau in SY5Y human neuroblastoma cells

    Microsoft Academic Search

    Toshihisa Tanaka; Khalid Iqbal; Ekkhart Trenkner; Dong Jie Liu; Inge Grundke-Iqbal

    1995-01-01

    In Alzheimer disease (AD) the microtubule associated protein (MAP) tau is hyperphosphorylated at several sites. In the present study, like AD tau, tau in the human neuroblastoma SH-SY5Y was found to be hyperphosphorylated, at Ser-199\\/202, Thr-231, Ser-396 and Ser-404. However, in contrast to AD, the tau in SY5Y cells was not hyperphosphorylated at Ser-235 and there was only one tau

  6. Biochemical Distribution of Tau Protein in Synaptosomal Fraction of Transgenic Mice Expressing Human P301L Tau

    PubMed Central

    Sahara, Naruhiko; Murayama, Miyuki; Higuchi, Makoto; Suhara, Tetsuya; Takashima, Akihiko

    2014-01-01

    Alzheimer’s disease is a progressive dementia that is characterized by a loss of recent memory. Evidence has accumulated to support the hypothesis that synapses are critical storage sites for memory. However, it is still uncertain whether tau protein is involved in associative memory storage and whether tau is distributed in mature brain synapses. To address this question, we examined the synaptosomal distribution of tau protein in both JNPL3 transgenic mice expressing human P301L tau and non-transgenic littermates. The JNPL3 mouse line is known as one of the mouse models of human tauopathy that develop motor and behavioral deficits with intracellular tau aggregates in the spinal cord and brainstem. The phenotype of disease progression is highly dependent on strain background. In this study, we confirmed that male JNPL3 transgenic mice with C57BL/6J strain background showed neither any sign of motor deficits nor accumulation of hyperphosphorylated tau in the sarkosyl-insoluble fraction until 18?months of age. Subcellular fractionation analysis showed that both mouse tau and human P301L tau were present in the synaptosomal fraction. Those tau proteins were less-phosphorylated than tau in the cytosolic fraction. Human P301L tau was preferentially distributed in the synaptosomal fraction while mouse endogenous tau was more distributed in the cytosolic fraction. Interestingly, a human-specific tau band with phosphorylation at Ser199 and Ser396 was observed in the synaptosomal fraction of JNPL3 mice. This tau was not identical to either tau species in cytosolic fraction or a prominent hyperphosphorylated 64?kDa tau species that was altered to tau pathology. These results suggest that exogenous human P301L tau induces synaptosomal distribution of tau protein with a certain phosphorylation. Regulating the synaptosomal tau level might be a potential target for a therapeutic intervention directed at preventing neurodegeneration. PMID:24653715

  7. Limit on the diffuse flux of ultrahigh energy tau neutrinos with the surface detector of the Pierre Auger Observatory

    Microsoft Academic Search

    J. Abraham; P. Abreu; M. Aglietta; C. Aguirre; E. J. Ahn; D. Allard; I. Allekotte; J. Allen; P. Allison; J. Alvarez-Muñiz; M. Ambrosio; L. Anchordoqui; S. Andringa; A. Anzalone; C. Aramo; S. Argirò; K. Arisaka; F. Arneodo; F. Arqueros; T. Asch; H. Asorey; P. Assis; J. Aublin; G. Avila; T. Bäcker; D. Badagnani; K. B. Barber; A. F. Barbosa; S. L. C. Barroso; B. Baughman; P. Bauleo; J. J. Beatty; T. Beau; B. R. Becker; K. H. Becker; A. Bellétoile; J. A. Bellido; S. Benzvi; C. Berat; P. Bernardini; X. Bertou; P. L. Biermann; P. Billoir; O. Blanch-Bigas; F. Blanco; H. Blümer; M. Bohácová; C. Bonifazi; R. Bonino; J. Brack; P. Brogueira; W. C. Brown; R. Bruijn; P. Buchholz; A. Bueno; R. E. Burton; N. G. Busca; K. S. Caballero-Mora; L. Caramete; R. Caruso; W. Carvalho; A. Castellina; O. Catalano; L. Cazon; R. Cester; J. Chauvin; A. Chiavassa; J. A. Chinellato; A. Chou; J. Chudoba; J. Chye; R. W. Clay; E. Colombo; R. Conceição; B. Connolly; F. Contreras; J. Coppens; A. Cordier; U. Cotti; S. Coutu; C. E. Covault; A. Creusot; A. Curutiu; J. Cronin; S. Dagoret-Campagne; K. Daumiller; B. R. Dawson; R. M. de Almeida; M. de Domenico; C. de Donato; S. J. de Jong; G. de La Vega; W. J. M. de Mello Junior; I. de Mitri; V. de Souza; G. Decerprit; L. Del Peral; O. Deligny; A. Della Selva; C. Delle Fratte; H. Dembinski; C. di Giulio; J. C. Diaz; P. N. Diep; C. Dobrigkeit; J. C. D'Olivo; P. N. Dong; D. Dornic; A. Dorofeev; J. C. Dos Anjos; M. T. Dova; D. D'Urso; I. Dutan; M. A. Duvernois; R. Engel; M. Erdmann; C. O. Escobar; A. Etchegoyen; P. Facal San Luis; H. Falcke; G. Farrar; A. C. Fauth; N. Fazzini; F. Ferrer; A. Ferrero; B. Fick; A. Filevich; A. Filipcic; I. Fleck; S. Fliescher; C. E. Fracchiolla; E. D. Fraenkel; W. Fulgione; R. F. Gamarra; S. Gambetta; B. García; D. García Gámez; D. Garcia-Pinto; X. Garrido; G. Gelmini; H. Gemmeke; P. L. Ghia; U. Giaccari; M. Giller; H. Glass; L. M. Goggin; M. S. Gold; G. Golup; F. Gomez Albarracin; M. Gómez Berisso; P. Gonçalves; M. Gonçalves Do Amaral; D. Gonzalez; J. G. Gonzalez; D. Góra; A. Gorgi; P. Gouffon; S. Grebe; M. Grigat; A. F. Grillo; Y. Guardincerri; F. Guarino; G. P. Guedes; J. Gutiérrez; J. D. Hague; V. Halenka; P. Hansen; D. Harari; S. Harmsma; J. L. Harton; A. Haungs; M. D. Healy; T. Hebbeker; G. Hebrero; D. Heck; C. Hojvat; V. C. Holmes; P. Homola; J. R. Hörandel; A. Horneffer; M. Hrabovský; T. Huege; M. Hussain; M. Iarlori; A. Insolia; F. Ionita; A. Italiano; S. Jiraskova; M. Kaducak; K. H. Kampert; T. Karova; P. Kasper; B. Kégl; B. Keilhauer; E. Kemp; R. M. Kieckhafer; H. O. Klages; M. Kleifges; J. Kleinfeller; R. Knapik; J. Knapp; D.-H. Koang; A. Krieger; O. Krömer; D. Kruppke; D. Kuempel; N. Kunka; A. Kusenko; G. La Rosa; C. Lachaud; B. L. Lago; M. S. A. B. Leão; D. Lebrun; P. Lebrun; J. Lee; M. A. Leigui de Oliveira; A. Lemiere; A. Letessier-Selvon; M. Leuthold; I. Lhenry-Yvon; R. López; A. Lopez Agüera; J. Lozano Bahilo; A. Lucero; R. Luna García; M. C. Maccarone; C. Macolino; S. Maldera; D. Mandat; P. Mantsch; A. G. Mariazzi; I. C. Maris; H. R. Marquez Falcon; D. Martello; J. Martínez; O. Martínez Bravo; H. J. Mathes; J. Matthews; G. Matthiae; D. Maurizio; P. O. Mazur; M. McEwen; R. R. McNeil; G. Medina-Tanco; M. Melissas; D. Melo; E. Menichetti; A. Menshikov; R. Meyhandan; M. I. Micheletti; G. Miele; W. Miller; L. Miramonti; S. Mollerach; M. Monasor; D. Monnier Ragaigne; F. Montanet; B. Morales; C. Morello; J. C. Moreno; C. Morris; M. Mostafá; S. Mueller; M. A. Muller; R. Mussa; G. Navarra; J. L. Navarro; S. Navas; P. Necesal; L. Nellen; C. Newman-Holmes; D. Newton; P. T. Nhung; N. Nierstenhoefer; D. Nitz; D. Nosek; L. Nozka; J. Oehlschläger; A. Olinto; V. M. Olmos-Gilbaja; M. Ortiz; F. Ortolani; N. Pacheco; D. Pakk Selmi-Dei; M. Palatka; J. Pallotta; G. Parente; E. Parizot; S. Parlati; S. Pastor; M. Patel; T. Paul; V. Pavlidou; K. Payet; M. Pech; J. Pekala; R. Pelayo; I. M. Pepe; L. Perrone; R. Pesce; E. Petermann; S. Petrera; P. Petrinca; A. Petrolini; Y. Petrov; J. Petrovic; C. Pfendner; A. Pichel; R. Piegaia; T. Pierog; M. Pimenta; T. Pinto; V. Pirronello; O. Pisanti; M. Platino; J. Pochon; V. H. Ponce; M. Pontz; P. Privitera; M. Prouza; E. J. Quel; J. Rautenberg; D. Ravignani; A. Redondo; S. Reucroft; B. Revenu; F. A. S. Rezende; J. Ridky; S. Riggi; M. Risse; C. Rivière; V. Rizi; C. Robledo; G. Rodriguez; J. Rodriguez Martino; J. Rodriguez Rojo; I. Rodriguez-Cabo; M. D. Rodríguez-Frías; G. Ros; J. Rosado; M. Roth; B. Rouillé-D'Orfeuil; E. Roulet; A. C. Rovero; F. Salamida; H. Salazar; G. Salina; F. Sánchez; M. Santander; C. E. Santo; E. M. Santos; F. Sarazin; S. Sarkar; R. Sato; N. Scharf; V. Scherini; H. Schieler; P. Schiffer; A. Schmidt; F. Schmidt; T. Schmidt; O. Scholten; H. Schoorlemmer; J. Schovancova; P. Schovánek; F. Schroeder; S. Schulte

    2009-01-01

    Data collected at the Pierre Auger Observatory are used to establish an upper limit on the diffuse flux of tau neutrinos in the cosmic radiation. Earth-skimming nutau may interact in the Earth's crust and produce a tau lepton by means of charged-current interactions. The tau lepton may emerge from the Earth and decay in the atmosphere to produce a nearly

  8. Measurement of the b --> tau-nutauX branching ratio

    Microsoft Academic Search

    D. Buskulic; D. Decamp; C. Goy; J.-P. Lees; M.-N. Minard; B. Mours; R. Alemany; F. Ariztizabal; P. Comas; J. M. Crespo; M. Delfino; E. Fernandez; V. Gaitan; Ll. Garrido; T. Mattison; A. Pacheco; A. Pascual; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; M. Maggi; S. Natali; S. Nuzzo; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; L. A. T. Bauerdick; E. Blucher; G. Bonvicini; F. Bossi; J. Boudreau; D. Casper; H. Drevermann; R. W. Forty; G. Ganis; C. Gay; R. Hagelberg; J. Harvey; S. Haywood; J. Hilgart; R. Jacobsen; B. Jost; J. Knobloch; E. Lançon; I. Lehraus; T. Lohse; A. Lusiani; M. Martinez; P. Mato; H. Meinhard; A. Minten; R. Miquel; H.-G. Moser; P. Palazzi; J. A. Perlas; J.-F. Pusztaszeri; F. Ranjard; G. Redlinger; L. Rolandi; J. Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; F. Sefkow; W. Tejessy; H. Wachsmuth; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; F. Badaud; M. Bardadin-Otwinowska; A. M. Bencheikh; R. El Fellous; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; B. Pietrzyk; J. Proriol; F. Prulhière; G. Stimpfl; T. Fearnley; J. D. Hansen; J. R. Hansen; P. H. Hansen; R. Møllerud; B. S. Nilsson; I. Efthymiopoulos; A. Kyriakis; E. Simopoulou; A. Vayaki; K. Zachariadou; J. Badier; A. Blondel; G. Bonneaud; J. C. Brient; G. Fouque; S. Orteu; A. Rosowsky; A. Rougé; M. Rumpf; R. Tanaka; M. Verderi; H. Videau; D. J. Candlin; M. I. Parsons; E. Veitch; L. Moneta; G. Parrini; M. Corden; C. Georgiopoulos; M. Ikeda; J. Lannutti; D. Levinthal; M. Mermikides; L. Sawyer; S. Wasserbaech; A. Antonelli; R. Baldini; G. Bencivenni; G. Bologna; P. Campana; G. Capon; F. Cerutti; V. Chiarella; B. D'Ettorre-Piazzoli; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; L. Passalacqua; M. Pepe-Altarelli; P. Picchi; B. Altoon; O. Boyle; P. Colrain; I. Ten Have; J. G. Lynch; W. Maitland; W. T. Morton; C. Raine; J. M. Scarr; K. Smith; A. S. Thompson; R. M. Turnbull; B. Brandl; O. Braun; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; Y. Maumary; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; A. T. Belk; R. Beuselinck; D. M. Binnie; W. Cameron; M. Cattaneo; D. J. Colling; P. J. Dornan; S. Dugeay; A. M. Greene; J. F. Hassard; N. M. Lieske; J. Nash; S. J. Patton; D. G. Payne; M. J. Phillips; J. K. Sedgbeer; I. R. Tomalin; A. G. Wright; E. Kneringer; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Keemer; M. Nuttall; A. Patel; T. Sloan; S. W. Snow; E. P. Whelan; K. Kleinknecht; J. Raab; B. Renk; H.-G. Sander; H. Schmidt; F. Steeg; S. M. Walther; B. Wolf; J.-J. Aubert; C. Benchouk; A. Bonissent; J. Carr; P. Coyle; J. Drinkard; F. Etienne; S. Papalexiou; P. Payre; Z. Qian; L. Roos; D. Rousseau; P. Schwemling; M. Talby; S. Adlung; C. Bauer; W. Blum; D. Brown; P. Cattaneo; G. Cowan; B. Dehning; H. Dietl; F. Dydak; M. Fernandez-Bosman; M. Frank; A. W. Halley; J. Lauber; G. Lütjens; G. Lutz; W. Männer; R. Richter; H. Rotscheidt; J. Schröder; A. S. Schwarz; R. Settles; H. Seywerd; U. Stierlin; U. Stiegler; R. St. Denis; M. Takashima; J. Thomas; G. Wolf; J. Boucrot; O. Callot; A. Cordier; M. Davier; J.-F. Grivaz; Ph. Heusse; D. E. Jaffe; P. Janot; D. W. Kim; F. Le Diberder; J. Lefrançois; A.-M. Lutz; M.-H. Schune; J.-J. Veillet; I. Videau; Z. Zhang; D. Abbaneo; S. R. Amendolia; G. Bagliesi; G. Batignani; L. Bosisio; U. Bottigli; C. Bozzi; C. Bradaschia; M. Carpinelli; M. A. Ciocci; R. dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; E. Focardi; F. Forti; A. Giassi; M. A. Giorgi; F. Ligabue; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; F. Palla; G. Rizzo; G. Sanguinetti; P. Spagnolo; J. Steinberger; R. Tenchini; G. Tonelli; G. Triggiani; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; J. M. Carter; M. G. Green; P. V. March; T. Medcalf; I. S. Quazi; J. A. Strong; L. R. West; D. R. Botterill; R. W. Clifft; T. R. Edgecock; M. Edwards; S. M. Fisher; T. J. Jones; P. R. Norton; D. P. Salmon; J. C. Thompson; B. Bloch-Devaux; P. Colas; H. Duarte; W. Kozanecki; M. C. Lemaire; E. Locci; S. Loucatos; E. Monnier; P. Perez; F. Perrier; J. Rander; J.-F. Renardy; A. Roussarie; J.-P. Schuller; J. Schwindling; D. Si Mohand; B. Vallage; R. P. Johnson; A. M. Litke; G. Taylor; J. Wear; J. G. Ashman; W. Babbage; C. N. Booth; C. Buttar; R. E. Carney; S. Cartwright; F. Combley; F. Hatfield; P. Reeves; L. F. Thompson; E. Barberio; A. Böhrer; S. Brandt; C. Grupen; F. Rivera; U. Schäfer; G. Giannini; B. Gobbo; F. Ragusa; L. Bellantoni; W. Chen; D. Cinabro; J. S. Conway; D. F. Cowen; Z. Feng; D. P. S. Ferguson; Y. S. Gao; J. Grahl; J. L. Harton; R. C. Jared; B. W. Leclaire; C. Lishka

    1993-01-01

    Using a missing energy tag, evidence is presented for the decay b --> tau-nutauX, and its branching ratio is measured to be (4.08 +\\/- 0.76 +\\/- 0.62)%. Supported by the US Department of Energy, contract DE-AC02-76ER00881.

  9. Measurement of the branching fraction beta(tau(-) -> pi(0) nu(tau))

    E-print Network

    Ammar, Raymond G.; Ball, S.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Copty, N.; Davis, Robin E. P.; Hancock, N.; Kelly, M.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Lam, H.

    1994-06-01

    Using data from the CLEO II detector at the Cornell Electron Storage Ring, we measure B(tau- --> h-pi0nu(tau)) where h- refers to either pi- or K-. We use three different methods to measure this branching fraction. The combined result is beta...

  10. Ultrahigh energy tau neutrino flux regeneration while skimming the Earth

    SciTech Connect

    Bigas, Oscar Blanch [LPNHE, CNRS/IN2P3 and Universite Paris VI-VIIbb, Paris (France); Deligny, Olivier [IPN, CNRS/IN2P3 and Universite Paris Sud, Orsay (France); Payet, Kevin [LPSC, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, INPG, Grenoble (France); Van Elewyck, Veronique [IPN, CNRS/IN2P3 and Universite Paris Sud, Orsay (France); AstroParticules et Cosmologie (UMR 7165) and Universite Paris 7, Paris (France)

    2008-09-15

    The detection of Earth-skimming tau neutrinos has turned into a very promising strategy for the observation of ultra-high-energy cosmic neutrinos. The sensitivity of this channel crucially depends on the parameters of the propagation of the tau neutrinos through the terrestrial crust, which governs the flux of emerging tau leptons that can be detected. One of the characteristics of this propagation is the possibility of regeneration through multiple {nu}{sub {tau}}{r_reversible}{tau} conversions, which are often neglected in the standard picture. In this paper, we solve the transport equations governing the {nu}{sub {tau}} propagation and compare the flux of emerging tau leptons obtained allowing regeneration or not. We discuss the validity of the approximation of neglecting the {nu}{sub {tau}} regeneration using different scenarios for the neutrino-nucleon cross sections and the tau energy losses.

  11. How it all started: tau and protein phosphatase 2A.

    PubMed

    Liu, Chang; Götz, Jürgen

    2013-01-01

    This review is dedicated to Inge Grundke-Iqbal who laid the foundations of the tau field, by isolating tau from the Alzheimer's disease (AD) brain, discovering that tau is hyperphosphorylated, and proving a critical role of protein phosphatase 2A (PP2A) and its endogenous inhibitor I2PP2A in this process. This memorial starts with a few personal notes, and then covers how subcellular fractionation helped in isolating tau. We review in detail the role of PP2A and its endogenous inhibitor in tau phosphorylation. We discuss the role that methylation and phosphorylation have in regulating PP2A activity. We add what we have contributed to understanding the role of tau and PP2A in AD using PP2A transgenic and knockout models, and conclude by addressing two underexplored areas in tau research: tau's non-canonical functions and the role distinct tau isoforms have in a physiological context. PMID:23948891

  12. Modulation of tau protein fibrillization by oleocanthal.

    PubMed

    Monti, Maria Chiara; Margarucci, Luigi; Riccio, Raffaele; Casapullo, Agostino

    2012-09-28

    Among the phenolic compounds extracted from extra virgin olive oil, oleocanthal (1) has attracted considerable attention in the modulation of many human diseases, such as inflammation and Alzheimer's disease (AD). Indeed, 1 is capable of altering the fibrillization of tau protein, which is one of the key factors at the basis of neurodegenerative diseases, and of covalently reacting with lysine ?-amino groups of the tau fragment K18 in an unspecific fashion. In the present study, an investigation of the recognition process and the reaction profile between 1 and the wild-type tau protein has been conducted by a circular dichroism, surface plasmon resonance, fluorescence, and mass spectrometry combined approach. As a result, 1 has been found to interact with tau-441, inducing stable conformational modifications of the protein secondary structure and also interfering with tau aggregation. These findings provide experimental support for the potential reduced risk of AD and related neurodegenerative diseases associated with olive oil consumption and may offer a new chemical scaffold for the development of AD-modulating agents. PMID:22988908

  13. Density of the Values Set of the Tau Function

    E-print Network

    N. A. Carella

    2014-04-10

    It is shown that the density of the values set {Tau(n): n Tau(n) of the discriminant function Delta(z), a cusp form of level N = 1 and weight k = 12, has the lower bound #{Tau(n): n > x/log x. The currently known density is #{Tau(n) : n > x^(1/2+o(1)), and the expected density is #{Tau(n) : n Tau(p) = 0 for all primes p => 2, which arises as a singular case of this analysis, is discussed within.

  14. Amplification of Tau Fibrils from Minute Quantities of Seeds

    PubMed Central

    2014-01-01

    The propagation of Tau pathology in Alzheimer’s disease (AD) is thought to proceed through templated conversion of Tau protein into fibrils and cell-to-cell transfer of elongation-competent seeds. To investigate the efficiency of Tau conversion, we adapted the protein misfolding cyclic amplification assay used for the conversion of prions. Utilizing heparin as a cofactor and employing repetitive cycles of shearing and growth, synthetic Tau fibrils and Tau fibrils in AD brain extract are progressively amplified. Concurrently, self-nucleation is suppressed. The results highlight breakage-induced replication of Tau fibrils as a potential facilitator of disease spread. PMID:25153692

  15. Two-Dimensional Electrophoresis of Tau Mutants Reveals Specific Phosphorylation Pattern Likely Linked to Early Tau Conformational Changes

    PubMed Central

    Bretteville, Alexis; Ando, Kunie; Ghestem, Antoine; Loyens, Anne; Bégard, Séverine; Beauvillain, Jean-Claude; Sergeant, Nicolas

    2009-01-01

    The role of Tau phosphorylation in neurofibrillary degeneration linked to Alzheimer's disease remains to be established. While transgenic mice based on FTDP-17 Tau mutations recapitulate hallmarks of neurofibrillary degeneration, cell models could be helpful for exploratory studies on molecular mechanisms underlying Tau pathology. Here, “human neuronal cell lines” overexpressing Wild Type or mutated Tau were established. Two-dimensional electrophoresis highlights that mutated Tau displayed a specific phosphorylation pattern, which occurs in parallel to the formation of Tau clusters as visualized by electron microscopy. In fact, this pattern is also displayed before Tau pathology onset in a well established mouse model relevant to Tau aggregation in Alzheimer's disease. This study suggests first that pathological Tau mutations may change the distribution of phosphate groups. Secondly, it is possible that this molecular event could be one of the first Tau modifications in the neurofibrillary degenerative process, as this phenomenon appears prior to Tau pathology in an in vivo model and is linked to early steps of Tau nucleation in Tau mutants cell lines. Such cell lines consist in suitable and evolving models to investigate additional factors involved in molecular pathways leading to whole Tau aggregation. PMID:19290042

  16. The importance of tau leptons for supersymmetry searches at the Tevatron

    E-print Network

    James D. Wells

    1998-04-06

    Supersymmetry is perhaps most effectively probed at the Tevatron through production and decay of weak gauginos. Most of the analyses of weak gaugino observables require electrons or muons in the final state. However, it is possible that the gauginos will decay primarily to tau leptons, thus complicating the search for supersymmetry. The motivating reasons for high tau multiplicity final states are discussed in three approaches to supersymmetry model building: minimal supergravity, gauge mediated supersymmetry breaking, and more minimal supersymmetry. The concept of ``e/mu/tau candidate'' is introduced, and an observable with three e/mu/tau candidates is defined in analog to the trilepton observable. The maximum mass reach for supersymmetry is then estimated when gaugino decays to tau leptons have full branching fraction.

  17. A Search for supersymmetric Higgs bosons in the di-tau decay mode in p anti-p collisions at s**(1/2) = 1.8-TeV

    SciTech Connect

    Acosta, D.; Affolder, Anthony A.; Albrow, M.G.; Ambrose, D.; Amidei, D.; Anikeev, K.; Antos, J.; Apollinari, G.; Arisawa, T.; Artikov, A.; Ashmanskas, W.; Azfar, F.; Azzi-Bacchetta, P.; Bacchetta, N.; Bachacou, H.; Badgett, W.; Barbaro-Galtieri, A.; Barnes, V.E.; Barnett, B.A.; Baroiant, S.; Barone, M.; /Taiwan, Inst. Phys. /Argonne, PHY /INFN,

    2005-06-01

    A search for direct production of Higgs bosons in the di-tau decay mode is performed with 86.3 {+-} 3.5 pb{sup -1} of data collected with the Collider Detector at Fermilab during the 1994-1995 data taking period of the Tevatron. We search for events where one tau decays to an electron plus neutrinos and the other tau decays hadronically. We perform a counting experiment and set limits on the cross section for supersymmetric Higgs boson production where tan {beta} is large and m{sub A} is small. For a benchmark parameter space point where m{sub A{sup 0}} = 100 GeV/c{sup 2} and tan {beta} = 50, we limit the production cross section multiplied by the branching ratio to be less than 77.9 pb at the 95% confidence level compared to theoretically predicted value of 11.0 pb. This is the first search for Higgs bosons decaying to tau pairs at a hadron collider.

  18. Search for Pair Production of Scalar Top Quarks Decaying to a tau Lepton and a b Quark in ppbar Collisions at sqrt{s}=1.96 TeV

    SciTech Connect

    Brigliadori, L.; Zheng, Y.; Zucchelli, S.; /Taiwan, Inst. Phys. /Bologna U. /Argonne /Barcelona, IFAE /Baylor U., Math. Dept. /Bologna U. /Brandeis U. /UC, Davis /UCLA /UC, San Diego /UC, Santa Barbara /Cantabria U., Santander /Carnegie Mellon U.

    2008-02-01

    We present the results of a search for pair production of scalar top quarks ({tilde t}{sub 1}) in an R-parity violating supersymmetric scenario using 322 pb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV collected by the upgraded Collider Detector at Fermilab. We assume each {tilde t}{sub 1} decays into a {tau} lepton and a b quark with a branching ratio {beta}, and that the final state contains either an electron or a muon from a leptonic {tau} decay, a hadronically decaying {tau} lepton, and two or more jets. Two candidate events pass our final selection criteria, consistent with the expectation from standard model processes. We present upper limits on the cross section times branching ratio squared {sigma}({tilde t}{sub 1}{bar {tilde t}}{sub 1}) x {beta}{sup 2} as a function of the stop mass m({tilde t}{sub 1}). Assuming {beta} = 1, we set a 95% confidence level limit m({tilde t}{sub 1}) > 153 GeV=c{sup 2} obtained using a next-to-leading order cross section. These limits are also fully applicable to the case of a pair produced third generation scalar leptoquark decaying into a {tau} lepton and a b quark.

  19. Pathological tau disrupts ongoing network activity.

    PubMed

    Menkes-Caspi, Noa; Yamin, Hagar G; Kellner, Vered; Spires-Jones, Tara L; Cohen, Dana; Stern, Edward A

    2015-03-01

    Pathological tau leads to dementia and neurodegeneration in tauopathies, including Alzheimer's disease. It has been shown to disrupt cellular and synaptic functions, yet its effects on the function of the intact neocortical network remain unknown. Using in vivo intracellular and extracellular recordings, we measured ongoing activity of neocortical pyramidal cells during various arousal states in the rTg4510 mouse model of tauopathy, prior to significant cell death, when only a fraction of the neurons show pathological tau. In transgenic mice, membrane potential oscillations are slower during slow-wave sleep and under anesthesia. Intracellular recordings revealed that these changes are due to longer Down states and state transitions of membrane potentials. Firing rates of transgenic neurons are reduced, and firing patterns within Up states are altered, with longer latencies and inter-spike intervals. By changing the activity patterns of a subpopulation of affected neurons, pathological tau reduces the activity of the neocortical network. PMID:25704951

  20. Tau neutrino search with the MAGIC telescope

    E-print Network

    M. Gaug; C. Hsu; J. K. Becker; A. Biland; M. Mariotti; W. Rhode; M. Teshima

    2007-09-10

    The MAGIC telescope located on the Roque de los Muchachos on the Canary Island La Palma at a height of 2200 m a.s.l. is able to point to the sea. This permits a search for air shower signatures induced by particles coming out of the Earth. An analytical approximation results in tau neutrino effective areas from ~10^3 m^2 (at 100 TeV) to 10^5 m^2 (at 1 EeV) for an observation angle of about 1 degree below the horizon, rapidly diminishing with further inclination. Taking into account the huge effective area, this configuration was investigated for its suitability to search for ultra-high energy (UHE) tau-neutrino signatures. The outcome of simulations for tau-neutrino signatures will be presented, models for astrophysical neutrino sources reviewed, and estimated event rates in MAGIC are shown.

  1. CO Fundamental Emission from V836 Tau

    E-print Network

    Joan R. Najita; Nathan Crockett; John S. Carr

    2008-09-23

    We present high resolution 4.7 micron CO fundamental spectroscopy of V836 Tau, a young star with properties that are between those of classical and weak T Tauri stars and which may be dissipating its circumstellar disk. We find that the CO line profiles of V836 Tau are unusual in that they are markedly double-peaked, even after correcting for stellar photospheric absorption in the spectrum. This suggests that the CO emission arises from a restricted range of disk radii (Tau results from the physical truncation of the disk or an excitation effect. We also explore how either of these hypotheses may bear on our understanding of disk dissipation in this system.

  2. PICALM modulates autophagy activity and tau accumulation

    PubMed Central

    Moreau, Kevin; Fleming, Angeleen; Imarisio, Sara; Lopez Ramirez, Ana; Mercer, Jacob L.; Jimenez-Sanchez, Maria; Bento, Carla F.; Puri, Claudia; Zavodszky, Eszter; Siddiqi, Farah; Lavau, Catherine P.; Betton, Maureen; O’Kane, Cahir J.; Wechsler, Daniel S.; Rubinsztein, David C.

    2014-01-01

    Genome-wide association studies have identified several loci associated with Alzheimer’s disease (AD), including proteins involved in endocytic trafficking such as PICALM/CALM (phosphatidylinositol binding clathrin assembly protein). It is unclear how these loci may contribute to AD pathology. Here we show that CALM modulates autophagy and alters clearance of tau, a protein which is a known autophagy substrate and which is causatively linked to AD, both in vitro and in vivo. Furthermore, altered CALM expression exacerbates tau-mediated toxicity in zebrafish transgenic models. CALM influences autophagy by regulating the endocytosis of SNAREs, such as VAMP2, VAMP3 and VAMP8, which have diverse effects on different stages of the autophagy pathway, from autophagosome formation to autophagosome degradation. This study suggests that the AD genetic risk factor CALM modulates autophagy, and this may affect disease in a number of ways including modulation of tau turnover. PMID:25241929

  3. Upper Limit on the Diffuse Flux of Ultrahigh Energy Tau Neutrinos from the Pierre Auger Observatory

    Microsoft Academic Search

    J. Abraham; P. Abreu; M. Aglietta; C. Aguirre; D. Allard; I. Allekotte; J. Allen; P. Allison; J. Alvarez-Muñiz; M. Ambrosio; L. Anchordoqui; S. Andringa; A. Anzalone; C. Aramo; S. Argirò; K. Arisaka; E. Armengaud; F. Arneodo; F. Arqueros; T. Asch; H. Asorey; P. Assis; B. S. Atulugama; J. Aublin; G. Avila; T. Bäcker; D. Badagnani; A. F. Barbosa; D. Barnhill; S. L. C. Barroso; P. Bauleo; J. J. Beatty; T. Beau; B. R. Becker; K. H. Becker; J. A. Bellido; S. Benzvi; C. Berat; T. Bergmann; P. Bernardini; X. Bertou; P. L. Biermann; P. Billoir; O. Blanch-Bigas; F. Blanco; P. Blasi; H. Blümer; M. Bohácová; C. Bonifazi; R. Bonino; M. Boratav; J. Brack; P. Brogueira; W. C. Brown; P. Buchholz; A. Bueno; R. E. Burton; N. G. Busca; K. S. Caballero-Mora; B. Cai; D. V. Camin; L. Caramete; R. Caruso; W. Carvalho; A. Castellina; O. Catalano; G. Cataldi; L. Cazon; R. Cester; J. A. Chinellato; A. Chiavassa; A. Chou; J. Chye; P. D. J. Clark; R. W. Clay; E. Colombo; R. Conceição; B. Connolly; F. Contreras; J. Coppens; A. Cordier; U. Cotti; S. Coutu; C. E. Covault; A. Creusot; A. Criss; J. Cronin; A. Curutiu; S. Dagoret-Campagne; K. Daumiller; B. R. Dawson; R. M. de Almeida; C. de Donato; S. J. de Jong; G. de La Vega; W. J. M. de Mello Junior; I. Demitri; V. de Souza; L. Del Peral; O. Deligny; A. Della Selva; C. Delle Fratte; H. Dembinski; C. di Giulio; J. C. Diaz; C. Dobrigkeit; J. C. D'Olivo; D. Dornic; A. Dorofeev; J. C. Dos Anjos; M. T. Dova; D. D'Urso; I. Dutan; M. A. Duvernois; R. Engel; L. Epele; M. Erdmann; C. O. Escobar; A. Etchegoyen; P. Facal San Luis; H. Falcke; G. Farrar; A. C. Fauth; N. Fazzini; F. Ferrer; S. Ferry; B. Fick; A. Filevich; A. Filipcic; I. Fleck; R. Fonte; C. E. Fracchiolla; W. Fulgione; B. García; D. García Gámez; D. Garcia-Pinto; X. Garrido; H. Geenen; G. Gelmini; H. Gemmeke; P. L. Ghia; M. Giller; H. Glass; M. S. Gold; G. Golup; F. Gomez Albarracin; M. Gómez Berisso; R. Gómez Herrero; P. Gonçalves; M. Gonçalves Do Amaral; D. Gonzalez; J. G. Gonzalez; M. González; D. Góra; A. Gorgi; P. Gouffon; V. Grassi; A. F. Grillo; C. Grunfeld; Y. Guardincerri; F. Guarino; G. P. Guedes; J. Gutiérrez; J. D. Hague; J. C. Hamilton; P. Hansen; D. Harari; S. Harmsma; J. L. Harton; A. Haungs; T. Hauschildt; M. D. Healy; T. Hebbeker; G. Hebrero; D. Heck; C. Hojvat; V. C. Holmes; P. Homola; J. Hörandel; A. Horneffer; M. Horvat; M. Hrabovský; T. Huege; M. Hussain; M. Iarlori; A. Insolia; F. Ionita; A. Italiano; M. Kaducak; K. H. Kampert; T. Karova; B. Kégl; B. Keilhauer; E. Kemp; R. M. Kieckhafer; H. O. Klages; M. Kleifges; J. Kleinfeller; R. Knapik; J. Knapp; D.-H. Koang; A. Krieger; O. Krömer; D. Kuempel; N. Kunka; A. Kusenko; G. La Rosa; C. Lachaud; B. L. Lago; D. Lebrun; P. Lebrun; J. Lee; M. A. Leigui de Oliveira; A. Letessier-Selvon; M. Leuthold; I. Lhenry-Yvon; R. López; A. Lopez Agüera; J. Lozano Bahilo; R. Luna García; M. C. Maccarone; C. Macolino; S. Maldera; G. Mancarella; M. E. Manceñido; D. Mandat; P. Mantsch; A. G. Mariazzi; I. C. Maris; H. R. Marquez Falcon; D. Martello; J. Martínez; O. Martínez Bravo; H. J. Mathes; J. Matthews; G. Matthiae; D. Maurizio; P. O. Mazur; T. McCauley; M. McEwen; R. R. McNeil; M. C. Medina; G. Medina-Tanco; A. Meli; D. Melo; E. Menichetti; A. Menschikov; Chr. Meurer; R. Meyhandan; M. I. Micheletti; G. Miele; W. Miller; S. Mollerach; M. Monasor; D. Monnier Ragaigne; F. Montanet; B. Morales; C. Morello; J. C. Moreno; C. Morris; M. Mostafá; M. A. Muller; R. Mussa; G. Navarra; J. L. Navarro; S. Navas; P. Necesal; L. Nellen; C. Newman-Holmes; D. Newton; T. Nguyen Thi; N. Nierstenhoefer; D. Nitz; D. Nosek; L. Nozka; J. Oehlschläger; T. Ohnuki; A. Olinto; V. M. Olmos-Gilbaja; M. Ortiz; F. Ortolani; S. Ostapchenko; L. Otero; N. Pacheco; D. Pakk Selmi-Dei; M. Palatka; J. Pallotta; G. Parente; E. Parizot; S. Parlati; S. Pastor; M. Patel; T. Paul; V. Pavlidou; K. Payet; M. Pech; J. Pekala; R. Pelayo; I. M. Pepe; L. Perrone; S. Petrera; P. Petrinca; Y. Petrov; Diep Pham Ngoc; Dong Pham Ngoc; T. N. Pham Thi; A. Pichel; R. Piegaia; T. Pierog; M. Pimenta; T. Pinto; V. Pirronello; O. Pisanti; M. Platino; J. Pochon; P. Privitera; M. Prouza; E. J. Quel; J. Rautenberg; A. Redondo; S. Reucroft; B. Revenu; F. A. S. Rezende; J. Ridky; S. Riggi; M. Risse; C. Rivière; V. Rizi; M. Roberts; C. Robledo; G. Rodriguez; D. Rodríguez Frías; J. Rodriguez Martino; J. Rodriguez Rojo; I. Rodriguez-Cabo; G. Ros; J. Rosado; M. Roth; B. Rouillé-D'Orfeuil; E. Roulet; A. C. Rovero; F. Salamida; H. Salazar; G. Salina; F. Sánchez; M. Santander; C. E. Santo; E. M. Santos; F. Sarazin; S. Sarkar; R. Sato; V. Scherini; H. Schieler; A. Schmidt; F. Schmidt; T. Schmidt; O. Scholten; P. Schovánek; F. Schüssler; S. J. Sciutto; M. Scuderi; A. Segreto; D. Semikoz; M. Settimo; R. C. Shellard; I. Sidelnik; B. B. Siffert; G. Sigl

    2008-01-01

    The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau neutrinos that interact in Earth's crust. Tau leptons from nutau charged-current interactions can emerge and decay in the atmosphere to produce a nearly horizontal shower with a significant electromagnetic component. The data collected between 1 January 2004 and 31 August 2007 are used to place an

  4. Tau mutants bind tubulin heterodimers with enhanced affinity.

    PubMed

    Elbaum-Garfinkle, Shana; Cobb, Garrett; Compton, Jocelyn T; Li, Xiao-Han; Rhoades, Elizabeth

    2014-04-29

    Tau is a microtubule binding protein that forms pathological aggregates in the brain in Alzheimer's disease and other tauopathies. Disease etiology is thought to arise from loss of native interactions between tau and microtubules, as well as from gain of toxicity tied to tau aggregation, although neither mechanism is well understood. Here we investigate the link between function and disease using disease-associated and disease-motivated mutants of tau. We find that mutations to highly conserved proline residues in repeats 2 and 3 of the microtubule binding domain have differential effects on tau binding to tubulin and the capacity of tau to enhance tubulin polymerization. Notably, mutations to these residues result in an increased affinity for tubulin dimers while having a negligible effect on binding to stabilized microtubules. We measure conformational changes in tau on binding to tubulin that provide a structural framework for the observed altered affinity and function. Additionally, we find that these mutations do not necessarily enhance aggregation, which could have important implications for tau therapeutic strategies that focus solely on searching for tau aggregation inhibitors. We propose a model that describes tau binding to tubulin dimers and a mechanism by which disease-relevant alterations to tau impact its function. Together, these results draw attention to the interaction between tau and free tubulin as playing an important role in mechanisms of tau pathology. PMID:24733915

  5. Structural Determinants of Tau Aggregation Inhibitor Potency*

    PubMed Central

    Schafer, Kelsey N.; Cisek, Katryna; Huseby, Carol J.; Chang, Edward; Kuret, Jeff

    2013-01-01

    Small-molecule Tau aggregation inhibitors are under investigation as potential therapeutic agents against Alzheimer disease. Many such inhibitors have been identified in vitro, but their potency-driving features, and their molecular targets in the Tau aggregation pathway, have resisted identification. Previously we proposed ligand polarizability, a measure of electron delocalization, as a candidate descriptor of inhibitor potency. Here we tested this hypothesis by correlating the ground state polarizabilities of cyanine, phenothiazine, and arylmethine derivatives calculated using ab initio quantum methods with inhibitory potency values determined in the presence of octadecyl sulfate inducer under reducing conditions. A series of rhodanine analogs was analyzed as well using potency values disclosed in the literature. Results showed that polarizability and inhibitory potency directly correlated within all four series. To identify putative binding targets, representative members of the four chemotypes were added to aggregation reactions, where they were found to stabilize soluble, but SDS-resistant Tau species at the expense of filamentous aggregates. Using SDS resistance as a secondary assay, and a library of Tau deletion and missense mutants as targets, interaction with cyanine was localized to the microtubule binding repeat region. Moreover, the SDS-resistant phenotype was completely dependent on the presence of octadecyl sulfate inducer, but not intact PHF6/PH6* hexapeptide motifs, indicating that cyanine interacted with a species in the aggregation pathway prior to nucleus formation. Together the data suggest that flat, highly polarizable ligands inhibit Tau aggregation by interacting with folded species in the aggregation pathway and driving their assembly into soluble but highly stable Tau oligomers. PMID:24072703

  6. Structural determinants of Tau aggregation inhibitor potency.

    PubMed

    Schafer, Kelsey N; Cisek, Katryna; Huseby, Carol J; Chang, Edward; Kuret, Jeff

    2013-11-01

    Small-molecule Tau aggregation inhibitors are under investigation as potential therapeutic agents against Alzheimer disease. Many such inhibitors have been identified in vitro, but their potency-driving features, and their molecular targets in the Tau aggregation pathway, have resisted identification. Previously we proposed ligand polarizability, a measure of electron delocalization, as a candidate descriptor of inhibitor potency. Here we tested this hypothesis by correlating the ground state polarizabilities of cyanine, phenothiazine, and arylmethine derivatives calculated using ab initio quantum methods with inhibitory potency values determined in the presence of octadecyl sulfate inducer under reducing conditions. A series of rhodanine analogs was analyzed as well using potency values disclosed in the literature. Results showed that polarizability and inhibitory potency directly correlated within all four series. To identify putative binding targets, representative members of the four chemotypes were added to aggregation reactions, where they were found to stabilize soluble, but SDS-resistant Tau species at the expense of filamentous aggregates. Using SDS resistance as a secondary assay, and a library of Tau deletion and missense mutants as targets, interaction with cyanine was localized to the microtubule binding repeat region. Moreover, the SDS-resistant phenotype was completely dependent on the presence of octadecyl sulfate inducer, but not intact PHF6/PH6* hexapeptide motifs, indicating that cyanine interacted with a species in the aggregation pathway prior to nucleus formation. Together the data suggest that flat, highly polarizable ligands inhibit Tau aggregation by interacting with folded species in the aggregation pathway and driving their assembly into soluble but highly stable Tau oligomers. PMID:24072703

  7. GLM equations, tau function and scattering data

    NASA Astrophysics Data System (ADS)

    Niedermaier, Max R.

    1994-02-01

    The direct and the inverse scattering problem for affine Toda/mKdV systems is addressed and is found to develop non-standard features within the framework of the inverse scattering method. A solution scheme based on the tau function formalism is described. The inverse problem is shown to be equivalent to a set of decoupled, scalar Gelfand-Levitan-Marchenko-type equations. The Fredholm-Grothendieck determinants of the latter are shown to define tau-functions in the sense of the Kyoto School. In particular, a simple monodromy formula allows the derivation of trace identities.

  8. Cell-based Models To Investigate Tau Aggregation

    PubMed Central

    Lim, Sungsu; Haque, Md. Mamunul; Kim, Dohee; Kim, Dong Jin; Kim, Yun Kyung

    2014-01-01

    Accumulation of abnormal tau aggregates in neuron is an important pathological signature in multiple neurodegenerative disorders including Alzheimer's disease. Tau is a neuron specific microtubule-associated protein that regulates microtubule stability, which is critical for axonal outgrowth and synaptic plasticity. In a pathological condition, tau dissociates from microtubules and forms insoluble aggregates called neurofibrillary tangles (NFTs). The accumulation of NFTs in neuron directly correlates with microtubule dysfunction and neuronal degeneration. Due to the pathophysiological importance of tau, great efforts have been made to understand tau aggregation processes and find therapeutics to halt or reverse the processes. However, progress has been slow due to the lack of a suitable method for monitoring tau aggregation. In this mini-review, we will review the conventional methods for studying tau aggregation, and introduce recent cell-based sensor approaches that allow monitoring tau aggregation in living cells. PMID:25505502

  9. Kendall's Tau in High-Dimension Parsimony Pranab Kumar Sen

    E-print Network

    Jureckova, Jana

    Kendall's Tau in High-Dimension Parsimony Pranab Kumar Sen University of North Carolina at Chapel be baffled with inadequately low sample size in order to have a reasonable margin of errors. Kendall's tau

  10. Atmospheric tau neutrinos in a multikiloton liquid argon detector

    SciTech Connect

    Conrad, Janet [Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Gouvea, Andre de; Shalgar, Shashank [Department of Physics and Astronomy, Northwestern University, Illinois 60208-3112 (United States); Spitz, Joshua [Department of Physics, Yale University, New Haven, Connecticut 06520 (United States)

    2010-11-01

    An ultralarge liquid argon time projection chamber based neutrino detector will have the uncommon ability to detect atmospheric {nu}{sub {tau}}/{nu}{tau} events. This paper discusses the most promising modes for identifying charged current {nu}{sub {tau}}/{nu}{tau}, and shows that, with simple kinematic cuts, {approx}30 {nu}{sub {tau}}+{nu}{tau} interactions can be isolated in a 100 kt{center_dot}yr exposure, with greater than 4{sigma} significance. This sample is sufficient to perform flux-averaged total cross-section and cross-section shape parametrization measurements--the first steps toward using {nu}{sub {tau}}/{nu}{tau} to search for physics beyond the standard model.

  11. Charged Higgs Boson Search at the Tevatron Upgrade Using Tau Polarization

    E-print Network

    Sreerup Raychaudhuri; D. P. Roy

    1995-03-07

    We explore the prospect of charged Higgs boson search in top quark decay at the Tevatron collider upgrade, taking advantage of the opposite states of $\\tau$ polarization resulting from the $H^\\pm$ and $W^\\pm$ decays. Methods of distinguishing the two contributions in the inclusive 1-prong hadronic decay channel of $\\tau$ are suggested. The resulting signature and discovery limit of $H^\\pm$ are presented for the Tevatron upgrade as well as the Tevatron$^\\star$ and the Ditevatron options.

  12. Elimination of spurious eigenvalues in the Chebyshev tau spectral method

    NASA Technical Reports Server (NTRS)

    Mcfadden, G. B.; Murray, B. T.; Boisvert, R. F.

    1990-01-01

    A very simple modification is presented for the Chebyshev tau method which can eliminate spurious eigenvalues, proceeding from a consideration of the vorticity-streamfunction reformulation of the Chebyshev tau method and the Chebyshev-Galerkin method, which have no spurious modes. Consideration of a model problem indicates that these two approaches are equivalent, and that they reduce to the present modification of the tau method. This modified tau method also eliminates spurious eigenvalues from the Orr-Sommerfeld equation.

  13. Initiation and Synergistic Fibrillization of Tau and Alpha-Synuclein

    Microsoft Academic Search

    Benoit I. Giasson; Mark S. Forman; Makoto Higuchi; Lawrence I. Golbe; Charles L. Graves; Paul T. Kotzbauer; John Q. Trojanowski; Virginia M.-Y. Lee

    2003-01-01

    Alpha-synuclein (alpha-syn) and tau polymerize into amyloid fibrils and form intraneuronal filamentous inclusions characteristic of neurodegenerative diseases. We demonstrate that alpha-syn induces fibrillization of tau and that coincubation of tau and alpha-syn synergistically promotes fibrillization of both proteins. The in vivo relevance of these findings is grounded in the co-occurrence of alpha-syn and tau filamentous amyloid inclusions in humans, in

  14. High Energy Tau Neutrinos: Production, Propagation and Prospects of Observations

    NASA Astrophysics Data System (ADS)

    Athar, Husain; Tseng, J.-J.; Lin, G.-L.

    2003-07-01

    High energy tau neutrinos with energy greater than several thousands of GeV may be produced in some astrophysical sites. A summary of the intrinsic high energy tau neutrino flux estimates from some representative astrophysical sites is presented including the effects of neutrino flavor oscillations. The presently envisaged prosp ects of observations of the oscillated high energy tau neutrino flux are mentioned. In particular, a recently suggested possibility of future observations of Earth-skimming high energy tau neutrinos is briefly discussed.

  15. A precision measurement of the Z{sup 0} lineshape parameters for the process Z{sup 0} {r_arrow} {tau}{sup +}{tau}{sup {minus}}

    SciTech Connect

    Lahmann, R.

    1996-12-31

    In this dissertation, a measurement of the partial decay width of the process Z{sup 0} {r_arrow} {tau}{sup +}{tau}{sup {minus}} using data collected during 1993 and 1994 at the OPAL detector at CERN is described. The cross sections of this process at three center-of-mass energies near the Z{sup 0} resonance were determined, and from a fit to those cross sections, the mass of the Z{sup 0}, its total decay width and its partial decay width into {tau}{sup +}{tau}{sup {minus}} final states were determined as M{sub Z} = 91.183 {+-} 0.020 GeV, {Lambda}{sub tot} = 2.514 {+-} 0.018 GeV and {Lambda}{sub {tau}{tau}} = 84.54 {+-} 0.59 MeV. Using published results for M{sub Z}, and {Lambda}{sub tot} with higher accuracy, a value for the partial decay width of {Lambda}{sub {tau}{tau}} = 84.02 {+-} 0.20 MeV was obtained. Further using published results for the decay width of the Z{sup 0} into quark pair final states, the invisible decay width of the Z{sup 0} was determined as {Lambda}{sub inv} = 496.9 {+-} 4.1 MeV, and the number of neutrino generations was determined as N{sub {nu}} = 2.974 {+-} 0.025(exp) {+-} 0.007 (m{sub top}, M{sub Higgs}). All results were found to be in good agreement with the Standard Model predictions and were consistent with the assumption of lepton universality within the Standard Model framework.

  16. The role of tau phosphorylation in transfected COS1 cells

    Microsoft Academic Search

    M. Medina; E. Montejo de Garcini; J. Avila

    1995-01-01

    Tau cDNAs from each of the six human isoforms were transfected into COS- 1 cells and, in every case, more than one peptide was observed. The diversity of expressed isoforms was due to different levels of tau phosphorylation. Tau phosphorylation results in a decrease of the protein electrophoretic mobility. The major contribution to this mobility shift is due to the

  17. Phosphorylation of Tau by Fyn: Implications for Alzheimer's Disease

    Microsoft Academic Search

    Gloria Lee; Ramasamy Thangavel; Vandana M. Sharma; Joel M. Litersky; Kiran Bhaskar; Sandy M. Fang; Lana H. Do; Athena Andreadis; Gary Van Hoesen; Hanna Ksiezak-Reding

    2004-01-01

    The abnormal phosphorylation of tau protein on serines and threonines is a hallmark characteristic of the neurofibrillary tangles of Alzheimer's disease (AD). The discovery that tau could be phosphorylated on tyrosine and evidence that A signal transduction involved tyrosine phosphorylation led us to question whether tyrosine phosphorylation of tau occurred during the neurodegenerative process. In this study we determined that

  18. Increased cerebrospinal fluid tau in patients with Alzheimer's disease

    Microsoft Academic Search

    Malene Jensen; Hans Basun; Lars Lannfelt

    1995-01-01

    One of the pathological features in Alzheimer's disease (AD) is neurofibrillary tangles in the brain. The main constituent of tangles is the microtubuli-associated protein tau in a hyperphosphorylated state. Tau is also released into cerebrospinal fluid (CSF), and in this study we have used an enzyme linked immunosorbent assay to measure tau in CSF from AD and control cases. Our

  19. www.arts.tau.ac.il/arts4u ,1002 " " ,

    E-print Network

    Shamir, Ron

    " d 2014/2013" #12;#12;d " 2014/2013" www.arts.tau.ac.il/arts4u #12; ,1002...................................................................................................................... #12;||||||| 4www.arts.tau.ac.il/arts4u : , " . , , , , , , , : . . , , . . , , , . , . , , . . www.arts.tau.ac.il/arts4u , , ." , ' #12;||||||| 5 2013-14 -- .13

  20. Research Report Females exhibit more extensive amyloid, but not tau,

    E-print Network

    Klein, William

    Research Report Females exhibit more extensive amyloid, but not tau, pathology in an Alzheimer models of AD develop AD-related amyloid beta (Abeta) and/or tau pathology, gender differences have expressing mutant APP, presenilin-1 and tau have significantly more aggressive Abeta pathology. We also found

  1. Regulation of Tau Phosphorylation in Microtubule Fractions by Apolipoprotein E

    E-print Network

    Wood, John G.

    In Alzheimer's disease (AD), a family of proteins collectively named tau are displaced from their nor- malRegulation of Tau Phosphorylation in Microtubule Fractions by Apolipoprotein E Denise Flaherty,1 an interaction and potentially modulatory effects on tau hyperphosphorylation by the different apoE isoforms

  2. Single molecule profiling of tau gene expression in Alzheimer's

    Microsoft Academic Search

    Chris Conrad; Jun Zhu; Cintia Conrad; David Schoenfeld; Zhide Fang; Martin Ingelsson; Stefan Stamm; George Church; Bradley T. Hyman

    Tau is a microtubule-associated protein that is important for establishing and maintaining neuronal morphology. In addition to its role in normal cells, tau protein is involved in many neurodegenerative diseases, e.g. Alzheimer's disease (AD) and frontotemporal dementia, as the main component of in- traneuronal aggregates. Alternative splicing of tau gene in the brain can give rise to at least six

  3. Proteasome inhibition increases tau accumulation independent of phosphorylation

    Microsoft Academic Search

    Ying-Hua Liu; Wei Wei; Jun Yin; Gong-Ping Liu; Qun Wang; Fu-Yuan Cao; Jian-Zhi Wang

    2009-01-01

    An intrinsic link between proteasome and tau degradation in Alzheimer's disease (AD) has been suggested, however, the role of proteasome in the proteolysis of tau is still uncertain. Here, we investigated the influence of proteasome inhibition on the accumulation, phosphorylation, ubiquitination, solubility of tau and the memory retention in rats. We observed that lactacystin inhibited the proteasome activities and increased

  4. Antisense Reduction of Tau in Adult Mice Protects against Seizures

    PubMed Central

    DeVos, Sarah L.; Goncharoff, Dustin K.; Chen, Guo; Kebodeaux, Carey S.; Yamada, Kaoru; Stewart, Floy R.; Schuler, Dorothy R.; Maloney, Susan E.; Wozniak, David F.; Rigo, Frank; Bennett, C. Frank; Cirrito, John R.; Holtzman, David M.

    2013-01-01

    Tau, a microtubule-associated protein, is implicated in the pathogenesis of Alzheimer's Disease (AD) in regard to both neurofibrillary tangle formation and neuronal network hyperexcitability. The genetic ablation of tau substantially reduces hyperexcitability in AD mouse lines, induced seizure models, and genetic in vivo models of epilepsy. These data demonstrate that tau is an important regulator of network excitability. However, developmental compensation in the genetic tau knock-out line may account for the protective effect against seizures. To test the efficacy of a tau reducing therapy for disorders with a detrimental hyperexcitability profile in adult animals, we identified antisense oligonucleotides that selectively decrease endogenous tau expression throughout the entire mouse CNS—brain and spinal cord tissue, interstitial fluid, and CSF—while having no effect on baseline motor or cognitive behavior. In two chemically induced seizure models, mice with reduced tau protein had less severe seizures than control mice. Total tau protein levels and seizure severity were highly correlated, such that those mice with the most severe seizures also had the highest levels of tau. Our results demonstrate that endogenous tau is integral for regulating neuronal hyperexcitability in adult animals and suggest that an antisense oligonucleotide reduction of tau could benefit those with epilepsy and perhaps other disorders associated with tau-mediated neuronal hyperexcitability. PMID:23904623

  5. Molecular Insights into the Reversible Formation of Tau Protein Fibrils

    PubMed Central

    Luo, Yin; Dinkel, Paul; Yu, Xiang; Margittai, Martin; Zheng, Jie; Nussinov, Ruth

    2013-01-01

    We computationally and experimentally showed that tau protein fibrils can be formed at high temperature. When cooled, the fibrils dissociate back to monomers. Heparin promotes tau fibril formation and prevents its reversion. Our results revealed the physicochemical mechanism of reversible formation of tau fibrils. PMID:23527380

  6. Molecular insights into the reversible formation of tau protein fibrils.

    PubMed

    Luo, Yin; Dinkel, Paul; Yu, Xiang; Margittai, Martin; Zheng, Jie; Nussinov, Ruth; Wei, Guanghong; Ma, Buyong

    2013-05-01

    We computationally and experimentally showed that tau protein fibrils can be formed at high temperature. When cooled, the fibrils dissociate back to monomers. Heparin promotes tau fibril formation and prevents its reversion. Our results revealed the physicochemical mechanism of reversible formation of tau fibrils. PMID:23527380

  7. Parafermions in the tau-2 model

    E-print Network

    Helen Au-Yang; Jacques H. H. Perk

    2014-07-04

    It has been shown recently by Baxter that the $\\tau_2(t_q)$ model with open boundary conditions can be solved by the "parafermionic" method of Fendley. In Baxter's paper there are several conjectures, which were formulated based on numerical short-chain calculations. Here we present the proof of two of them.

  8. Phosphorylation dynamics regulate Hsp27-mediated rescue of neuronal plasticity deficits in tau transgenic mice

    PubMed Central

    Abisambra, Jose F.; Blair, Laura J.; Hill, Shannon E.; Jones, Jeffrey R.; Kraft, Clara; Rogers, Justin; Koren, John; Jinwal, Umesh K.; Lawson, Lisa; Johnson, Amelia G.; Wilcock, Donna; O'Leary, John C.; Jansen-West, Karen; Muschol, Martin; Golde, Todd E.; Weeber, Edwin J.; Banko, Jessica; Dickey, Chad A.

    2010-01-01

    Molecular chaperones regulate the aggregation of a number of proteins that pathologically misfold and accumulate in neurodegenerative diseases. Identifying ways to manipulate these proteins in disease models is an area of intense investigation; however, the translation of these results to the mammalian brain has progressed more slowly. In this study, we investigated the ability of one of these chaperones, heat shock protein 27 (Hsp27), to modulate tau dynamics. Recombinant wildtype Hsp27 and a genetically altered version of Hsp27 that is perpetually pseudo-phosphorylated (3xS/D) were generated. Both Hsp27 variants interacted with tau, and atomic force microscopy and dynamic light scattering showed that both variants could also prevented tau filament formation. However, extrinsic genetic delivery of these two Hsp27 variants to tau transgenic mice using adeno-associated viral particles showed that wildtype Hsp27 reduced neuronal tau levels, while 3xS/D Hsp27 was associated with increased tau levels. Moreover, rapid decay in hippocampal long-term potentiation (LTP) intrinsic to this tau transgenic model was rescued by wildtype Hsp27 over-expression, but not by 3xS/D Hsp27. Since the 3xS/D Hsp27 mutant cannot cycle between phosphorylated and de-phosphorylated states, we can conclude that Hsp27 must be functionally dynamic to facilitate tau clearance from the brain and rescue LTP; however when this property is compromised, Hsp27 may actually facilitate accumulation of soluble tau intermediates. PMID:21084594

  9. A Measurement of the charged-current interaction cross section of the tau neutrino

    SciTech Connect

    Maher, Emily O'Connor; /Minnesota U.

    2005-01-01

    The Fermilab experiment E872 (DONUT) was designed to make the first observation of the tau neutrino charged-current interaction. Using a hybrid emulsion-spectrometer detector, the tau lepton was identified by its single-prong or trident decay. Six interactions were observed, of which five were in the deep inelastic scattering region. These five interaction were used to measure the charged-current cross section of the tau neutrino. To minimize uncertainties, the tau neutrino cross section was measured relative to the electron neutrino cross section. The result {sigma}{sub {nu}{sub {tau}}N}{sup const}/{sigma}{sub {nu}{sub e}N}{sup const} = 0.77 {+-} 0.39 is consistent with 1.0, which is predicted by lepton universality. The tau neutrino cross section was also measured for 115 GeV neutrinos, which was the average energy of the interacted tau neutrinos. The result {sigma}{sub {nu}{sub {tau}}N}{sup exp} = 45 {+-} 21 x 10{sup -38} cm{sup 2} is consistent with the standard model prediction calculated in this thesis, {sigma}{sub {tau}N}{sup SM} = 48 {+-} 5 x 10{sup -38} cm{sup 2}.

  10. Expression of multiple tau isoforms and microtubule bundle formation in fibroblasts transfected with a single tau cDNA

    Microsoft Academic Search

    Yoshimitsu Kanai; Reiko Takemum; Takeshi Oshima; Hiroshi Mori; Yasuo Ihara

    1990-01-01

    Tau proteins are a class of low molecular mass microtubule-associated proteins that are specifically expressed in the nervous system. A cDNA clone of adult rat tau was isolated and sequenced. To analyze functions of tau proteins in vivo, we carried out transfection experiments. A fibroblast cell line, which was transfected with the cDNA, expressed three bands of tau, while six

  11. Aberrant glycosylation modulates phosphorylation of tau by protein kinase A and dephosphorylation of tau by protein phosphatase 2A and 5

    Microsoft Academic Search

    F Liu; T Zaidi; K Iqbal; I Grundke-Iqbal; C.-X Gong

    2002-01-01

    Microtubule-associated protein tau is abnormally hyperphosphorylated, glycosylated, and aggregated in affected neurons in Alzheimer’s disease (AD). We recently found that the aberrant tau glycosylation precedes tau hyperphosphorylation in AD brain. In the present study, we developed assays to determine phosphorylation and dephosphorylation of tau at specific phosphorylation sites by using glycosylated tau purified from AD brain as a substrate. We

  12. Tau-function of discrete isomonodromy transformations and probability

    E-print Network

    D. Arinkin; A. Borodin

    2007-06-21

    We introduce the tau-function of a rational d-connection and its isomonodromy transformations. We show that in a continuous limit our tau-function agrees with the Jimbo-Miwa-Ueno tau-function, compute the tau-function for the isomonodromy transformations leading to difference Painleve V and difference Painleve VI equations, and prove that the gap probability for a wide class of discrete random matrix type models can be viewed as the tau-function for an associated d-connection.

  13. MC data (4.9.1) 700PYTHIAW[tau

    E-print Network

    MC data (4.9.1) 100HERWIG 700PYTHIAW[tau] 100HERWIG 1400PYTHIAW[mu] 100HERWIG 1400PYTHIAW[e] 96PYTHIASing top(only t) 512PYTHIA Sing top (t&s channels) 340PYTHIA 400HERWIGttbar 570HERWIG 650PYTHIADY[tau-cdf.fnal.gov/internal/physics/top/mc/mc_samples_491.shtml http://ncdf43.fnal.gov/~safonov/tau/MCTau.htm 92[h, h] 50[mu, h] 50[ e, h]Z[tau] 180Tau

  14. Search for the Higgs boson in lepton, tau and jets final states

    E-print Network

    D0 Collaboration

    2013-01-28

    We present a search for the standard model Higgs boson in final states with an electron or muon and a hadronically decaying tau lepton in association with two or more jets using 9.7 fb^{-1} of Run II Fermilab Tevatron Collider data collected with the D0 detector. The analysis is sensitive to Higgs boson production via gluon fusion, associated vector boson production, and vector boson fusion, followed by the Higgs boson decay to tau lepton pairs or to W boson pairs. The ratios of 95% C.L. upper limits on the cross section times branching ratio to those predicted by the standard model are obtained for orthogonal subsamples that are enriched in either H -> tau tau decays or H -> WW decays, and for the combination of these subsample limits. The observed and expected limit ratios for the combined subsamples at a Higgs boson mass of 125 GeV are 11.3 and 9.0 respectively.

  15. Downward-going tau neutrinos as a new prospect of detecting dark matter

    NASA Astrophysics Data System (ADS)

    Fornengo, N.; Niro, V.

    2011-11-01

    Dark matter trapped in the Sun produces a flux of all flavors of neutrinos, which then reach the Earth after propagating out of the Sun and oscillating from the production point to the detector. The typical signal which is looked at refers to the muon neutrino component and consists of a flux of up-going muons in a neutrino detector, the major source of background being atmospheric neutrinos. We propose instead a novel signature, namely the possibility of looking at the tau neutrino component of the dark matter signal, which is almost background-free in the downward-going direction, since the tau neutrino amount in atmospheric neutrinos is negligible and in the down-going baseline atmospheric muon-neutrinos have no time to sizably oscillate. We analyze the prospects of studying the downward-going tau neutrinos from dark matter annihilation (or decay) in the Sun in Cherenkov detectors, by looking at hadronic showers produced in the charged-current tau neutrino interactions and subsequent tau decay. We discuss the various sources of background (namely the small tau neutrino component in atmospheric neutrinos, both from direct production and from oscillations; tau neutrinos from solar corona interactions; the galactic tau neutrino component) as well as sources of background due to misidentification of electron and muon events. We find that the downward-going tau neutrinos signal has potentially very good prospects for Mton scale Cherenkov detectors, the main limitation being the level of misidentification of non-tau events, which need to be kept at level of percent. Several tens of events per year (depending on the dark matter mass and annihilation/decay channel) are potentially collectible with a Mton scale detector, and a 5 ? significance discovery is potentially reachable for dark matter masses in the range from 20 to 300 GeV with a few years of exposure on a Mton detector.

  16. The Disk around the Brown Dwarf KPNO Tau 3

    NASA Astrophysics Data System (ADS)

    Broekhoven-Fiene, Hannah; Matthews, Brenda; Duchêne, Gaspard; Di Francesco, James; Scholz, Aleks; Chrysostomou, Antonio; Jayawardhana, Ray

    2014-07-01

    We present submillimeter observations of the young brown dwarfs KPNO Tau 1, KPNO Tau 3, and KPNO Tau 6 at 450 ?m and 850 ?m taken with the Submillimetre Common-User Bolometer Array on the James Clerk Maxwell Telescope. KPNO Tau 3 and KPNO Tau 6 have been previously identified as Class II objects hosting accretion disks, whereas KPNO Tau 1 has been identified as a Class III object and shows no evidence of circumsubstellar material. Our 3? detection of cold dust around KPNO Tau 3 implies a total disk mass of (4.0 ± 1.1) × 10-4 M ? (assuming a gas to dust ratio of 100:1). We place tight constraints on any disks around KPNO Tau 1 or KPNO Tau 6 of <2.1 × 10-4 M ? and <2.7 × 10-4 M ?, respectively. Modeling the spectral energy distribution of KPNO Tau 3 and its disk suggests the disk properties (geometry, dust mass, and grain size distribution) are consistent with observations of other brown dwarf disks and low-mass T-Tauri stars. In particular, the disk-to-host mass ratio for KPNO Tau 3 is congruent with the scenario that at least some brown dwarfs form via the same mechanism as low-mass stars.

  17. Tau functions and the limit of block Toeplitz determinants

    E-print Network

    Mattia Cafasso; Chao-Zhong Wu

    2014-04-21

    A classical way to introduce tau functions for integrable hierarchies of solitonic equations is by means of the Sato-Segal-Wilson infinite-dimensional Grassmannian. Every point in the Grassmannian is naturally related to a Riemann-Hilbert problem on the unit circle, for which Bertola proposed a tau function that generalizes the Jimbo-Miwa-Ueno tau function for isomonodromic deformation problems. In this paper, we prove that the Sato-Segal-Wilson tau function and the (generalized) Jimbo-Miwa-Ueno isomonodromy tau function coincide under a very general setting, by identifying each of them to the large-size limit of a block Toeplitz determinant. As an application, we give a new definition of tau function for Drinfeld-Sokolov hierarchies (and their generalizations) by means of infinite-dimensional Grassmannians, and clarify their relation with other tau functions given in the literature.

  18. Tau--an inhibitor of deacetylase HDAC6 function.

    PubMed

    Perez, Mar; Santa-Maria, Ismael; Gomez de Barreda, Elena; Zhu, Xiongwei; Cuadros, Raquel; Cabrero, Jose Roman; Sanchez-Madrid, Francisco; Dawson, Hana N; Vitek, Michael P; Perry, George; Smith, Mark A; Avila, Jesus

    2009-06-01

    Analysis of brain microtubule protein from patients with Alzheimer's disease showed decreased alpha tubulin levels along with increased acetylation of the alpha tubulin subunit, mainly in those microtubules from neurons containing neurofibrillary tau pathology. To determine the relationship of tau protein and increased tubulin acetylation, we studied the effect of tau on the acetylation-deacetylation of tubulin. Our results indicate that tau binds to the tubulin-deacetylase, histone deacetylase 6 (HDAC6), decreasing its activity with a consequent increase in tubulin acetylation. As expected, increased acetylation was also found in tubulin from wild-type mice compared with tubulin from mice lacking tau because of the tau-mediated inhibition of the deacetylase. In addition, we found that an excess of tau protein, as a HDAC6 inhibitor, prevents induction of autophagy by inhibiting proteasome function. PMID:19457097

  19. Tau mediated neurodegeneration: an insight into Alzheimer's disease pathology.

    PubMed

    Obulesu, M; Venu, R; Somashekhar, R

    2011-08-01

    Extracellular accumulations of A?, hyperphosphorylation of tau and intracellular neurofibrillary tangle formation have been the hallmarks of Alzheimer's Disease (AD). Although tau and its phosphorylation play a pivotal role in the normal physiology yet its hyperphosphorylation has been a pathological manifestation in neurodegenerative disorders like AD. In this review physiology of tau, its phosphorylation, hyperphosphorylation with the intervention of various kinases, aggregation and formation of paired helical filaments has been discussed. A brief account of various animal models employed to study the pathological manifestation of tau in AD and therapeutic strategies streamlined to counter the tau induced pathology has been given. The reasons for the failure to have suitable animal model to study AD pathology and recent success in achieving this has been included. The role of caspase cascade in tau cleavage has been emphasized. The summary of current studies on tau and the need for future studies has been accentuated. PMID:21509508

  20. A Young Planet Search in Visible and IR Light: DN Tau, V836 Tau, and V827 Tau

    E-print Network

    L. Prato; M. Huerta; C. M. Johns-Krull; N. Mahmud; D. T. Jaffe; P. Hartigan

    2008-09-21

    In searches for low-mass companions to late-type stars, correlation between radial velocity variations and line bisector slope changes indicates contamination by large starspots. Two young stars demonstrate that this test is not sufficient to rule out starspots as a cause of radial velocity variations. As part of our survey for substellar companions to T Tauri stars, we identified the ~2 Myr old planet host candidates DN Tau and V836 Tau. In both cases, visible light radial velocity modulation appears periodic and is uncorrelated with line bisector span variations, suggesting close companions of several M_Jup in these systems. However, high-resolution, infrared spectroscopy shows that starspots cause the radial velocity variations. We also report unambiguous results for V827 Tau, identified as a spotted star on the basis of both visible light and infrared spectroscopy. Our results suggest that infrared follow up observations are critical for determining the source of radial velocity modulation in young, spotted stars.

  1. PE859, a novel tau aggregation inhibitor, reduces aggregated tau and prevents onset and progression of neural dysfunction in vivo.

    PubMed

    Okuda, Michiaki; Hijikuro, Ichiro; Fujita, Yuki; Wu, Xiaofeng; Nakayama, Shinichi; Sakata, Yoko; Noguchi, Yuji; Ogo, Makoto; Akasofu, Shigeru; Ito, Yoshimasa; Soeda, Yoshiyuki; Tsuchiya, Nobuhiko; Tanaka, Naoki; Takahashi, Takashi; Sugimoto, Hachiro

    2015-01-01

    In tauopathies, a neural microtubule-associated protein tau (MAPT) is abnormally aggregated and forms neurofibrillary tangle. Therefore, inhibition of the tau aggregation is one of the key approaches for the treatment of these diseases. Here, we have identified a novel tau aggregation inhibitor, PE859. An oral administration of PE859 resulted in the significant reduction of sarkosyl-insoluble aggregated tau along with the prevention of onset and progression of the motor dysfunction in JNPL3 P301L-mutated human tau transgenic mice. These results suggest that PE859 is useful for the treatment of tauopathies. PMID:25659102

  2. Electrochemical Investigations into Kinase-Catalyzed Transformations of Tau Protein

    PubMed Central

    2013-01-01

    The formation of neurofibrillary tangles by hyperphosphorylated tau is a well-recognized hallmark of Alzheimer’s disease. Resulting from malfunctioning protein kinases, hyperphosphorylated tau is unable to bind microtubules properly, causing it to self-associate and aggregate. The effects of tau phosphorylation on tau conformation and aggregation are still largely unexplored. The conformational analysis of tau and its hyperphosphorylated forms is usually performed by a variety of spectroscopic techniques, all of which require ample sample concentrations and/or volumes. Here we report on the use of surface based electrochemical techniques that allow for detection of conformational changes and orientation of tau protein as a function of tau phosphorylation by tyrosine and serine/threonine kinases. The electrochemical methods utilize 5?-?-ferrocenyl adenosine triphosphate (Fc-ATP) derivative as a cosubstrate and tau immobilized on gold surface to probe the role of the following protein kinases: Sarcoma related kinase (Src), Abelson tyrosine kinase (Abl), tau-tubulin kinase (TTBK), proto-oncogene tyrosine protein kinase Fyn (Fyn), and glycogen synthase kinase 3-? (Gsk-3?). The single kinase and sequential kinase-catalyzed Fc-phosphorylations modulate the electrochemical signal, pointing to the dramatic changes around the Fc group in the Fc-phosphorylated tau films. The location and orientation of the Fc-group in Fc-tau film was investigated by the surface plasmon resonance based on antiferrocene antibodies. Additional surface characterization of the Fc-tau films by time-of-flight secondary ion-mass spectrometry and X-ray photoelectron spectroscopy revealed that Fc-phosphorylations influence the tau orientation and conformation on surfaces. When Fc-phosphorylations were performed in solution, the subsequently immobilized Fc-tau exhibited similar trends. This study illustrates the validity and the utility of the labeled electrochemical approach for probing the changes in protein film properties, conformation, and orientation as a function of the enzymatically catalyzed modifications. PMID:23687953

  3. Characterization of tau oligomeric seeds in progressive supranuclear palsy

    PubMed Central

    2014-01-01

    Background Progressive supranuclear palsy (PSP) is a neurodegenerative tauopathy which is primarily defined by the deposition of tau into globose-type neurofibrillary tangles (NFT). Tau in its native form has important functions for microtubule dynamics. Tau undergoes alternative splicing in exons 2, 3, and 10 which results in six different isoforms. Products of splicing on exon 10 are the most prone to mutations. Three repeat (3R) and four repeat (4R) tau, like other disease-associated amyloids, can form oligomers which may then go on to further aggregate and form fibrils. Recent studies from our laboratory and others have provided evidence that tau oligomers, not NFTs, are the most toxic species in neurodegenerative tauopathies and seed the pathological spread of tau. Results Analysis of PSP brain sections revealed globose-type NFTs, as well as both phosphorylated and unphosphorylated tau oligomers. Analysis of PSP brains via Western blot and ELISA revealed the presence of increased levels of tau oligomers compared to age-matched control brains. Oligomers were immunoprecipitated from PSP brain and were capable of seeding the oligomerization of both 3R and 4R tau isoforms. Conclusions This is the first time tau oligomers have been characterized in PSP. These results indicate that tau oligomers are an important component of PSP pathology, along with NFTs. The ability of PSP brain-derived tau oligomers to seed 3R and 4R tau suggests that these oligomers represent the pathological species responsible for disease propagation and the presence of oligomers in a pure neurodegenerative tauopathy implies a common neuropathological process for tau seen in diseases with other amyloid proteins. PMID:24927818

  4. Electrochemical investigations into kinase-catalyzed transformations of tau protein.

    PubMed

    Rains, Meghan K; Marti?, Sanela; Freeman, Daniel; Kraatz, Heinz Bernhard

    2013-08-21

    The formation of neurofibrillary tangles by hyperphosphorylated tau is a well-recognized hallmark of Alzheimer's disease. Resulting from malfunctioning protein kinases, hyperphosphorylated tau is unable to bind microtubules properly, causing it to self-associate and aggregate. The effects of tau phosphorylation on tau conformation and aggregation are still largely unexplored. The conformational analysis of tau and its hyperphosphorylated forms is usually performed by a variety of spectroscopic techniques, all of which require ample sample concentrations and/or volumes. Here we report on the use of surface based electrochemical techniques that allow for detection of conformational changes and orientation of tau protein as a function of tau phosphorylation by tyrosine and serine/threonine kinases. The electrochemical methods utilize 5'-?-ferrocenyl adenosine triphosphate (Fc-ATP) derivative as a cosubstrate and tau immobilized on gold surface to probe the role of the following protein kinases: Sarcoma related kinase (Src), Abelson tyrosine kinase (Abl), tau-tubulin kinase (TTBK), proto-oncogene tyrosine protein kinase Fyn (Fyn), and glycogen synthase kinase 3-? (Gsk-3?). The single kinase and sequential kinase-catalyzed Fc-phosphorylations modulate the electrochemical signal, pointing to the dramatic changes around the Fc group in the Fc-phosphorylated tau films. The location and orientation of the Fc-group in Fc-tau film was investigated by the surface plasmon resonance based on antiferrocene antibodies. Additional surface characterization of the Fc-tau films by time-of-flight secondary ion-mass spectrometry and X-ray photoelectron spectroscopy revealed that Fc-phosphorylations influence the tau orientation and conformation on surfaces. When Fc-phosphorylations were performed in solution, the subsequently immobilized Fc-tau exhibited similar trends. This study illustrates the validity and the utility of the labeled electrochemical approach for probing the changes in protein film properties, conformation, and orientation as a function of the enzymatically catalyzed modifications. PMID:23687953

  5. Measurement of Tau branching ratios

    Microsoft Academic Search

    D. Decamp; B. Deschizeaux; C. Goy; J.-P. Lees; M.-N. Minard; R. Alemany; J. M. Crespo; M C Delfino; E. Fernandez; V. Gaitan; Ll. Garrido; Ll. M. Mir; A. Pacheco; M. G. Catanesi; D. Creanza; M. de Palma; A. Farilla; Giuseppe Iaselli; G. Maggi; M. Maggi; S. Natali; S. Nuzzo; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Ruan; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; W. B. Atwood; L. A. T. Bauerdick; F. Bird; E. Blucher; G. Bonvicini; F. Bossi; J. Boudreau; T. H. Burnett; H. Drevermann; R. W. Forty; C. Grab; R. Hagelberg; S. Haywood; J. Hilgart; B. Jost; M. Kasemann; J. Knobloch; A. Lacourt; E. Lançon; I. Lehraus; T. Lohse; A. Lusiani; A. Marchioro; M. Martinez; P. Mato; S. Menary; T. Meyer; A. Minten; A. Miotto; R. Miquel; H.-G. Moser; J. Nash; P. Palazzi; F. Ranjard; G. Redlinger; L. Rolandi; A E Roth; J E Rothberg; M. Saich; D. Schlatter; M. Schmelling; W. Tejessy; H. Wachsmuth; S. Wasserbaech; W. Wiedenmann; W. Witzeling; J. Wotschack; Z. Ajaltouni; F. Badaud; M. Bardadin-Otwinowska; A. M. Bencheikh; R. El Fellous; A. Falvard; P. Gay; C. Guicheney; P. Henrard; J. Jousset; B. Michel; J.-C. Montret; D. Pallin; P. Perret; B. Pietrzyk; J. Proriol; F. Prulhière; G. Stimpfl; J. D. Hansen; J. R. Hansen; P. H. Hansen; R. Møllerud; B. S. Nilsson; I. Efthymiopoulos; E. Simopoulos; A. Vayaki; J. Badier; A. Blondel; G. Bonneaud; J. C. Brient; G. Fouque; A. Gamess; J. Harvey; S. Orteu; A. Rosowsky; A. Rougé; M. Rumpf; R. Tanaka; H. Videau; D. J. Candlin; E. Veitch; L. Moneta; G. Parrini; M. Corden; C. Georgiopoulos; M. Ikeda; J. Lannutti; D. Levinthal; M. Mermikides; L. Sawyer; A. Antonelli; R. Baldini; G. Bencivenni; G. Bologna; P. Campana; G. Capon; F. Cerutti; V. Chiarella; B. D'Ettore-Piazzoli; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; L. Passalacqua; M. Pepe-Altarelli; P. Picchi; P. Zografou; B. Altoon; O. Boyle; P. Colrain; A. W. Halley; I. ten Have; J. G. Lynch; W. Maitland; W. T. Morton; C. Raine; J. M. Scarr; K. Smith; A. S. Thompson; R. M. Turnbull; B. Brandl; O. Braun; R. Geiges; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; Y. Maumary; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; A. T. Belk; R. Beuselinck; D. M. Binnie; W. Cameron; M. Cattaneo; P. J. Dornan; S. Dugeay; A. M. Greene; J. F. Hassard; N. M. Lieske; S. J. Patton; D. G. Payne; M. J. Phillips; J. K. Sedgbeer; G. Taylor; I. R. Tomalin; A. G. Wright; P. Girtler; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Broodbeck; A. J. Finch; F. Foster; G. Hughes; D. Jackson; N. R. Keemer; M. Nuttall; A. Patel; T. Sloan; S. W. Snow; E. P. Whelan; T. Barczewski; K. Kleinknecht; J. Raab; B. Renk; S. Roehn; H.-G. Sander; H. Schmidt; F. Steeg; S. M. Walther; B. Wolf; J.-J. Aubert; C. Benchouk; V. Bernard; A. Bonissent; J. Carr; P. Coyle; J. Drinkhard; F. Etienne; S. Papalexiou; P. Payre; Z. Qian; D. Rousseau; P. Schwemling; M. Talby; S. Adlung; H. Becker; W. Blum; D. Brown; P. Cattaneo; G. Cowan; B. Dehning; H. Dietl; F. Dydak; M. Fernandez-Bosman; T. Hansl-Kosanecka; A. Jahn; W. Kozanecki; E. Lange; J. Lauber; G. Lütjens; G. Lutz; W. Männer; R. Richter; H. Rotscheidt; J. Schröder; A. S. Schwarz; R. Settles; U. Stierlin; U. Stiegler; R. St. Denis; M. Takashima; J. Thomas; G. Wolf; V. Bertin; J. Boucrot; O. Callot; X. Chen; A. Cordier; M. Davier; J.-F. Grivaz; Ph. Heusse; P. Janot; D. W. Kim; F. Le Diberder; J. Lefrançois; A.-M. Lutz; M.-H. Schune; J.-J. Veillet; I. Videau; Z. Zhang; F. Zomer; D. Abbaneo; S. R. Amendolia; G. Bagliesi; G. Batignani; L. Bosisio; U. Bottigli; C. Bradaschia; M. Carpinelli; R. Dell'Orso; I. Ferrante; F. Fidecaro; L. Foà; E. Focardi; F. Forti; C. Gatto; A. Grassi; M. A. Giorgi; F. Ligabue; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; F. Palla; G. Sanguinetti; J. Steinberger; R. Tenchini; G. Tonelli; G. Triggiani; C. Vannini; A. Venturi; P. G. Verdini; J. Walsh; J. M. Carter; M. G. Green; P. V. March; T. Medcalf; I. S. Quasi; J. A. Strong; L. R. West; T. Wildish; D. R. Botterill; R. W. Clifft; T. R. Edgecock; M. Edwards; S. M. Fisher; T. J. Jones; P. R. Norton; D. P. Salmon; J. C. Thompson; B. Bloch-Devaux; P. Colas; E. Locci; S. Loucatos; E. Monnier; P. Perez; J. A. Perlas; F. Perrier; J. Rander; J.-F. Renardy; A. Roussarie; J.-P. Schuller; J. Schwindling; B. Vallage; J. G. Ashman; C. N. Booth; C. Buttar; R. E. Carney; S. Cartwright; F. Combley; M. Dogru; F. Hatfield; J. Martin; D. Parker; P. Reeves; L. F. Thompson; E. Barberio; S. Brandt; C. Grupen; H. Meinhard; L. Mirabito; U. Schäfer; H. Seywerd; G. Ganis; G. Giannini; B. Gobbo; F. Ragusa; L. Bellantoni; D. Cinabro; J. S. Conway; D. F. Cowen; Z. Feng; D. P. S. Ferguson; Y. S. Gao; J. Grahl; J. L. Harton; R. C. Jared; R. P. Johnson; B. W. LeClaire; C. Lishka; Y. B. Pan; J. R. Pater; Y. Saadi

    1992-01-01

    Using the data accumulated at LEP in 1989 and 1990 with the ALEPH detector, the inclusive and exclusive branching ratios of the t lepton have been measured assuming lepton universality inZ0 decays. The inclusive branching fractions for the t decay into one, three, and five charged particles have been determined to be (85.45±0.97)%, (14.35±0.48)%, and (0.10±0.05)%, respectively, in agreement with

  6. Differential induction and spread of tau pathology in young PS19 tau transgenic mice following intracerebral injections of pathological tau from Alzheimer’s disease or corticobasal degeneration brains

    PubMed Central

    Boluda, Susana; Iba, Michiyo; Zhang, Bin; Raible, Kevin M.; Lee, Virginia M-Y.; Trojanowski, John Q.

    2015-01-01

    Filamentous tau pathologies are hallmark lesions of several neurodegenerative tauopathies including Alzheimer’s disease (AD) and corticobasal degeneration (CBD) which show cell type-specific and topographically distinct tau inclusions. Growing evidence supports templated transmission of tauopathies through functionally interconnected neuroanatomical pathways suggesting that different self-propagating strains of pathological tau could account for the diverse manifestations of neurodegenerative tauopathies. Here, we describe the rapid and distinct cell type-specific spread of pathological tau following intracerebral injections of CBD or AD brain extracts enriched in pathological tau (designated CBD-Tau and AD-Tau, respectively) in young human mutant P301S tau transgenic (Tg) mice (line PS19) ~6–9 months before they show onset of mutant tau transgene-induced tau pathology. At 1 month post-injection of CBD-Tau, tau inclusions developed predominantly in oligodendrocytes of the fimbria and white matter near the injection sites with infrequent intraneuronal tau aggregates. In contrast, injections of AD-Tau in young PS19 mice induced tau pathology predominantly in neuronal perikarya with little or no oligodendrocyte involvement 1 month post-injection. With longer post-injection survival intervals of up to 6 months, CBD-Tau- and AD-Tau-induced tau pathology spread to different brain regions distant from the injection sites while maintaining the cell type-specific pattern noted above. Finally, CA3 neuron loss was detected 3 months post-injection of AD-Tau but not CBD-Tau. Thus, AD-Tau and CBD-Tau represent specific pathological tau strains that spread differentially and may underlie distinct clinical and pathological features of these two tauopathies. Hence, these strains could become targets to develop disease-modifying therapies for CBD and AD. PMID:25534024

  7. TAU as Tao. [interstellar spacecraft performance

    NASA Technical Reports Server (NTRS)

    Lyman, P. T.; Reid, M. S.

    1989-01-01

    This paper discusses the feasibility of building and launching a truly deep-space spacecraft mission that will penetrate near interstellar space to a depth of one thousand astronomical units (TAU) within a flight time of 50 years. Particular attention is given to the mission profile and to its communications system, power system, and propulsion system. Results of experimental studies indicate that, with advanced technology, reasonable trip times can be achieved and adequate science information can be brought to earth.

  8. Mechanisms of tau-induced neurodegeneration

    Microsoft Academic Search

    Khalid Iqbal; Fei Liu; Cheng-Xin Gong; Alejandra del C. Alonso; Inge Grundke-Iqbal

    2009-01-01

    Alzheimer disease (AD) and related tauopathies are histopathologically characterized by a specific type of slow and progressive\\u000a neurodegeneration, which involves the abnormal hyperphosphorylation of the microtubule associated protein (MAP) tau. This\\u000a hallmark, called neurofibrillary degeneration, is seen as neurofibrillary tangles, neuropil threads, and dystrophic neurites\\u000a and is apparently required for the clinical expression of AD, and in related tauopathies it

  9. Single-molecule tracking of tau reveals fast kiss-and-hop interaction with microtubules in living neurons

    PubMed Central

    Janning, Dennis; Igaev, Maxim; Sündermann, Frederik; Brühmann, Jörg; Beutel, Oliver; Heinisch, Jürgen J.; Bakota, Lidia; Piehler, Jacob; Junge, Wolfgang; Brandt, Roland

    2014-01-01

    The microtubule-associated phosphoprotein tau regulates microtubule dynamics and is involved in neurodegenerative diseases collectively called tauopathies. It is generally believed that the vast majority of tau molecules decorate axonal microtubules, thereby stabilizing them. However, it is an open question how tau can regulate microtubule dynamics without impeding microtubule-dependent transport and how tau is also available for interactions other than those with microtubules. Here we address this apparent paradox by fast single-molecule tracking of tau in living neurons and Monte Carlo simulations of tau dynamics. We find that tau dwells on a single microtubule for an unexpectedly short time of ?40 ms before it hops to the next. This dwell time is 100-fold shorter than previously reported by ensemble measurements. Furthermore, we observed by quantitative imaging using fluorescence decay after photoactivation recordings of photoactivatable GFP–tagged tubulin that, despite this rapid dynamics, tau is capable of regulating the tubulin–microtubule balance. This indicates that tau's dwell time on microtubules is sufficiently long to influence the lifetime of a tubulin subunit in a GTP cap. Our data imply a novel kiss-and-hop mechanism by which tau promotes neuronal microtubule assembly. The rapid kiss-and-hop interaction explains why tau, although binding to microtubules, does not interfere with axonal transport. PMID:25165145

  10. Search for neutral minimal supersymmetric standard model Higgs bosons decaying to tau pairs produced in association with b quarks in pp collisions at ?s = 1.96 TeV.

    PubMed

    Abazov, V M; Abbott, B; Acharya, B S; Adams, M; Adams, T; Alexeev, G D; Alkhazov, G; Alton, A; Alverson, G; Alves, G A; Aoki, M; Arov, M; Askew, A; Åsman, B; Atramentov, O; Avila, C; BackusMayes, J; Badaud, F; Bagby, L; Baldin, B; Bandurin, D V; Banerjee, S; Barberis, E; Baringer, P; Barreto, J; Bartlett, J F; Bassler, U; Bazterra, V; Beale, S; Bean, A; Begalli, M; Begel, M; Belanger-Champagne, C; Bellantoni, L; Beri, S B; Bernardi, G; Bernhard, R; Bertram, I; Besançon, M; Beuselinck, R; Bezzubov, V A; Bhat, P C; Bhatnagar, V; Blazey, G; Blessing, S; Bloom, K; Boehnlein, A; Boline, D; Boos, E E; Borissov, G; Bose, T; Brandt, A; Brandt, O; Brock, R; Brooijmans, G; Bross, A; Brown, D; Brown, J; Bu, X B; Buehler, M; Buescher, V; Bunichev, V; Burdin, S; Burnett, T H; Buszello, C P; Calpas, B; Camacho-Pérez, E; Carrasco-Lizarraga, M A; Casey, B C K; Castilla-Valdez, H; Chakrabarti, S; Chakraborty, D; Chan, K M; Chandra, A; Chen, G; Chevalier-Théry, S; Cho, D K; Cho, S W; Choi, S; Choudhary, B; Cihangir, S; Claes, D; Clutter, J; Cooke, M; Cooper, W E; Corcoran, M; Couderc, F; Cousinou, M-C; Croc, A; Cutts, D; Das, A; Davies, G; De, K; de Jong, S J; De La Cruz-Burelo, E; Déliot, F; Demarteau, M; Demina, R; Denisov, D; Denisov, S P; Desai, S; Deterre, C; DeVaughan, K; Diehl, H T; Diesburg, M; Ding, P F; Dominguez, A; Dorland, T; Dubey, A; Dudko, L V; Duggan, D; Duperrin, A; Dutt, S; Dyshkant, A; Eads, M; Edmunds, D; Ellison, J; Elvira, V D; Enari, Y; Evans, H; Evdokimov, A; Evdokimov, V N; Facini, G; Ferbel, T; Fiedler, F; Filthaut, F; Fisher, W; Fisk, H E; Fortner, M; Fox, H; Fuess, S; Garcia-Bellido, A; Gavrilov, V; Gay, P; Geng, W; Gerbaudo, D; Gerber, C E; Gershtein, Y; Ginther, G; Golovanov, G; Goussiou, A; Grannis, P D; Greder, S; Greenlee, H; Greenwood, Z D; Gregores, E M; Grenier, G; Gris, Ph; Grivaz, J-F; Grohsjean, A; Grünendahl, S; Grünewald, M W; Guillemin, T; Guo, F; Gutierrez, G; Gutierrez, P; Haas, A; Hagopian, S; Haley, J; Han, L; Harder, K; Harel, A; Hauptman, J M; Hays, J; Head, T; Hebbeker, T; Hedin, D; Hegab, H; Heinson, A P; Heintz, U; Hensel, C; Heredia-De La Cruz, I; Herner, K; Hesketh, G; Hildreth, M D; Hirosky, R; Hoang, T; Hobbs, J D; Hoeneisen, B; Hohlfeld, M; Hubacek, Z; Huske, N; Hynek, V; Iashvili, I; Ilchenko, Y; Illingworth, R; Ito, A S; Jabeen, S; Jaffré, M; Jamin, D; Jayasinghe, A; Jesik, R; Johns, K; Johnson, M; Johnston, D; Jonckheere, A; Jonsson, P; Joshi, J; Jung, A W; Juste, A; Kaadze, K; Kajfasz, E; Karmanov, D; Kasper, P A; Katsanos, I; Kehoe, R; Kermiche, S; Khalatyan, N; Khanov, A; Kharchilava, A; Kharzheev, Y N; Kirby, M H; Kohli, J M; Kozelov, A V; Kraus, J; Kulikov, S; Kumar, A; Kupco, A; Kur?a, T; Kuzmin, V A; Kvita, J; Lammers, S; Landsberg, G; Lebrun, P; Lee, H S; Lee, S W; Lee, W M; Lellouch, J; Li, L; Li, Q Z; Lietti, S M; Lim, J K; Lincoln, D; Linnemann, J; Lipaev, V V; Lipton, R; Liu, Y; Liu, Z; Lobodenko, A; Lokajicek, M; Lopes de Sa, R; Lubatti, H J; Luna-Garcia, R; Lyon, A L; Maciel, A K A; Mackin, D; Madar, R; Magaña-Villalba, R; Malik, S; Malyshev, V L; Maravin, Y; Martínez-Ortega, J; McCarthy, R; McGivern, C L; Meijer, M M; Melnitchouk, A; Menezes, D; Mercadante, P G; Merkin, M; Meyer, A; Meyer, J; Miconi, F; Mondal, N K; Muanza, G S; Mulhearn, M; Nagy, E; Naimuddin, M; Narain, M; Nayyar, R; Neal, H A; Negret, J P; Neustroev, P; Novaes, S F; Nunnemann, T; Obrant, G; Orduna, J; Osman, N; Osta, J; Otero y Garzón, G J; Padilla, M; Pal, A; Parashar, N; Parihar, V; Park, S K; Parsons, J; Partridge, R; Parua, N; Patwa, A; Penning, B; Perfilov, M; Peters, K; Peters, Y; Petridis, K; Petrillo, G; Pétroff, P; Piegaia, R; Pleier, M-A; Podesta-Lerma, P L M; Podstavkov, V M; Polozov, P; Popov, A V; Prewitt, M; Price, D; Prokopenko, N; Protopopescu, S; Qian, J; Quadt, A; Quinn, B; Rangel, M S; Ranjan, K; Ratoff, P N; Razumov, I; Renkel, P; Rijssenbeek, M; Ripp-Baudot, I; Rizatdinova, F; Rominsky, M; Ross, A; Royon, C; Rubinov, P; Ruchti, R; Safronov, G; Sajot, G; Salcido, P; Sánchez-Hernández, A; Sanders, M P; Sanghi, B; Santos, A S; Savage, G; Sawyer, L; Scanlon, T; Schamberger, R D; Scheglov, Y; Schellman, H; Schliephake, T; Schlobohm, S; Schwanenberger, C; Schwienhorst, R; Sekaric, J; Severini, H; Shabalina, E; Shary, V; Shchukin, A A; Shivpuri, R K; Simak, V; Sirotenko, V; Skubic, P; Slattery, P; Smirnov, D; Smith, K J; Snow, G R; Snow, J; Snyder, S; Söldner-Rembold, S; Sonnenschein, L; Soustruznik, K; Stark, J; Stolin, V; Stoyanova, D A; Strauss, M; Strom, D; Stutte, L; Suter, L; Svoisky, P; Takahashi, M; Tanasijczuk, A; Taylor, W; Titov, M; Tokmenin, V V; Tsai, Y-T; Tschann-Grimm, K; Tsybychev, D; Tuchming, B; Tully, C; Uvarov, L; Uvarov, S; Uzunyan, S; Van Kooten, R; van Leeuwen, W M; Varelas, N; Varnes, E W; Vasilyev, I A; Verdier, P; Vertogradov, L S; Verzocchi, M; Vesterinen, M; Vilanova, D; Vokac, P; Wahl, H D

    2011-09-16

    We report results from a search for neutral Higgs bosons produced in association with b quarks using data recorded by the D0 experiment at the Fermilab Tevatron Collider and corresponding to an integrated luminosity of 7.3 fb(-1). This production mode can be enhanced in several extensions of the standard model (SM) such as in its minimal supersymmetric extension (MSSM) at high tan?. We search for Higgs bosons decaying to tau pairs with one tau decaying to a muon and neutrinos and the other to hadrons. The data are found to be consistent with SM expectations, and we set upper limits on the cross section times branching ratio in the Higgs boson mass range from 90 to 320 GeV/c(2). We interpret our result in the MSSM parameter space, excluding tan? values down to 25 for Higgs boson masses below 170 GeV/c(2). PMID:22026764

  11. Measurement of the ttbar Interaction Cross Section in the tau+jets Decay Channel via Multivariable Template Fitting of 4.6 fb^{-1} of data collected at ?s = 7 TeV by the ATLAS Detector

    E-print Network

    Edson, William; Greenwood, Dick; Skubic, Patrick

    This analysis measured the entire ttbar cross section through the specific decay channel to a tau, tau neutrino and four quark jets utilizing the full 2011 ATLAS collected data sample of 4.6fb^{-1}. Measurement was achieved by creating templates based on Monte Carlo samples for the various well-modeled background and signal in conjunction with a data-driven derived template for QCD multijet samples. Signal separation was achieved by utilizing Boosted Decision Tree multi-variables designed to identify true from fake taus. The final result was determined to be 165.8 ±9.9 (.)? 30.0+ 29.7(.)±3.0(.) pb which is in agreement with previous measurements of this cross section both within and beyond this decay channel as well as Standard Model predictions.

  12. Search for Higgs bosons predicted in two-Higgs-doublet models via decays to tau lepton pairs in 1.96-TeV p anti-p collisions

    SciTech Connect

    Aaltonen, T.; /Helsinki Inst. of Phys.; Adelman, Jahred A.; /Chicago U., EFI; Akimoto,