Note: This page contains sample records for the topic pi-pi stacking interaction from Science.gov.
While these samples are representative of the content of Science.gov,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of Science.gov
to obtain the most current and comprehensive results.
Last update: November 12, 2013.
1

Self-assembled monolayers of aromatic thiols stabilized by parallel-displaced pi-pi stacking interactions.  

PubMed

Parallel-displaced pi-pi stacking interactions have been known to be the dominant force in stabilizing the double helical structure of DNA and the tertiary structure of proteins. However, little is known about their roles in self-assembled monolayers of other large pi molecules such as aromatic thiols. Here we report on a systematic study of the self-assembled monolayers of four kinds of anthracene-based thiols, 9-mercaptoanthracene (MA), (4-mercaptophenyl) (9-anthryl) acetylene (MPAA), (4-mercaptophenyl) (10-nitro-9-anthryl) acetylene (MPNAA), and (4-mercaptophenyl) (10-carboxyl-9-anthryl) acetylene (MPCAA) on Au(111), in which a spacer and different functional groups (NO2 and COOH) are intentionally designed to introduce and thus allow the investigation of various intermolecular interactions, in addition to pi-pi interactions in the base molecules. We find that all molecules form long-range-ordered monolayers and, more interestingly, that these assembled monolayers exhibit essentially the same fundamental packing structure. On the basis of high-resolution scanning tunneling microscopy observations, we propose the space-filling models for the observed superstructures and demonstrate that all superstructures can be understood in terms of the parallel-displaced pi-pi stacking interactions, despite the presence of competing dipole-dipole and H-bonding interactions associated with these specially designed functional groups. PMID:16548556

Dou, Rui-Fen; Ma, Xu-Cun; Xi, Luan; Yip, Hin Lap; Wong, King Young; Lau, Woon Ming; Jia, Jin-Feng; Xue, Qi-Kun; Yang, Wei-Sheng; Ma, Hong; Jen, Alex K-Y

2006-03-28

2

A trinuclear Pt(II) compound with short Pt-Pt-Pt contacts. An analysis of the influence of pi-pi stacking interactions on the strength and length of the Pt-Pt bond.  

PubMed

In this work we report the first example of a trinuclear Pt(II) complex with Pt-Pt-Pt bonds that are not facilitated by direct intervention of bridging ligands but are partially held by the attractive pi-pi stacking interaction between the phenyl units of the 4,4'-dimethyl-2,2'-bipyridyl ligands. The effect of the pi-pi stacking interactions on the strength and length of the Pt-Pt bond has been discussed using reduced models of the interacting moieties in which the aromatic rings have been removed. The nature of the Pt-Pt bonds has been studied through energy decomposition and atoms-in-molecules analyses. The results indicate that the relatively strong (about 40 kcal mol(-1)) Pt-Pt metallic bond has similar covalent and ionic contributions. PMID:16482356

Poater, Albert; Moradell, Silvia; Pinilla, Elena; Poater, Jordi; Solà, Miquel; Martínez, M Angeles; Llobet, Antoni

2005-11-15

3

Intramolecular pi-pi stacking interactions in 2-substituted N,N-dibenzylaziridinium ions and their regioselectivity in nucleophilic ring-opening reactions.  

PubMed

The ring opening of 2-substituted N,N-dibenzylaziridinium ions by bromide is known to occur exclusively at the substituted aziridine carbon atom via an S(N)2 mechanism, whereas the opposite regioselectivity has been observed as the main pathway for ring opening by fluoride. Similarly, the hydride-induced ring opening of 2-substituted N,N-dibenzylaziridinium ions has been shown to take place solely at the less hindered position. To gain insight into the main factors causing this difference in regioselectivity, a thorough and detailed computational analysis was performed on the hydride- and halide-induced ring openings of 1-benzyl-1-(alpha-(R)-methylbenzyl)-2(S)-(phenoxymethyl)aziridinium bromide. Intramolecular pi-pi stacking interactions in the aziridinium system were investigated at a range of levels that enable a proper description of dispersive interactions; a T-stacking conformer was found to be the most stable. Ring-opening mechanisms were investigated with a variety of DFT and high level ab initio methods to test the robustness of the energetics along the pathway in terms of the electronic level of theory. The necessity to utilize explicit solvent molecules to solvate halide ions was clearly shown; the potential energy surfaces for nonsolvated and solvated cases differed dramatically. It was shown that in the presence of a kinetically viable route, product distribution will be dictated by the energetically preferred pathway; this was observed in the case of hard nucleophiles (both hydride donors and fluoride). However, for the highly polarizable soft nucleophile (bromide), it was shown that in the absence of a large energy difference between transition states leading to competing pathways, the formation of the thermodynamic product is likely to be the driving force. Distortion/interaction analysis on the transition states has shown a considerable difference in interaction energies for the solvated fluoride case, pointing to the fact that sterics plays a major role in the outcome, whereas for the bromide this difference was insignificant, suggesting bromide is less influenced by the difference in sterics. PMID:20039650

Catak, Saron; D'hooghe, Matthias; De Kimpe, Norbert; Waroquier, Michel; Van Speybroeck, Veronique

2010-02-01

4

Oligomeric tectonics: supramolecular assembly of double-stranded oligobisnorbornene through pi-pi stacking.  

PubMed

Self-assembly at the molecular level in solutions or on a surface is a subject of current interest. Herein we describe the tailoring of oligobisnorbornene 1, which represents an innovative concept of a preorganized building block on the tens of nanometer scale. The rodlike 1 has vinyl and styrenyl end groups. Scanning tunneling microscopy (STM) reveals that the oligomers aggregate anisotropically along the long axis and form a one-dimensional assembly in which, remarkably, no interstitial gap appears between neighboring oligomers. Dynamic light-scattering (DLS) measurements indicate that the assembly develops in solution. With a shear treatment for dropcast films, a unidirectionally ordered domain with a defect density less than 0.5 % can be prepared. Simulation results by molecular dynamics suggest that there may be multiple interactions such as pi-pi stacking and dipolar attractions taking place between the termini of the oligomers. To demonstrate the importance of double bonds in the oligomeric backbones and termini towards the tectonic assembly, a hydrogenated analogue was synthesized; pi-pi interactions are thus less significant and the film morphology is completely different from that of 1. This work extends the concept of molecular tectonics to preorganized oligomers and opens up a new avenue of nanopatterning toward nanodevices. PMID:19777517

Lee, Shern-Long; Lin, Nai-Ti; Liao, Wei-Chih; Chen, Chun-hsien; Yang, Hsiao-Ching; Luh, Tien-Yau

2009-11-01

5

pi-pi, K-pi and K-K interactions from lattice QCD  

NASA Astrophysics Data System (ADS)

I will discuss recent lattice calculations of the I=2 pi-pi, I=3/2 K-pi and I=1 K-K scattering processes from the NPLQCD Collaboration. Combined with chiral perturbation theory, these hadron interaction processes can be used to make precise determinations of the corresponding scattering lengths and the Gasser-Leutwyler coefficients which contribute to these interactions.

Walker-Loud, Andre

2009-10-01

6

Equation of state of an interacting pion gas with realistic {pi}-{pi} interactions  

SciTech Connect

Within the finite-temperature Green{close_quote}s-function formalism we study the equation of state of a hot interacting pion gas at zero chemical potential. Employing realistic {pi}{pi} meson-exchange interactions, we self-consistently calculate the in-medium single-pion self-energy and the {pi}{pi} scattering amplitude in the quasiparticle approximation. These quantities are then used to evaluate the thermodynamic potential {Omega}{sub {pi}}({ital T}) from which the state variables of pressure, entropy, and energy density can be derived. In contrast to earlier calculations based on the low-energy Weinberg Lagrangian we find an overall increase as compared to the free-gas results. We also consider the possibility of a dropping {rho}-meson mass as suggested by the {open_quote}{open_quote}Brown-Rho scaling{close_quote}{close_quote} law. {copyright} {ital 1996 The American Physical Society.}

Rapp, R.; Wambach, J. [Institut fuer Kernphysik (Theorie), Forschungszentrum Juelich, D-52425 Juelich (Germany)

1996-06-01

7

Langmuir-Schaeffer films from a pi-pi stacking perylenediimide dye: organization and charge transfer properties.  

PubMed

The organization of pi-pi stacking perylenediimide (PDI) derivative, PDI12, was studied in solution and in thin films. Films were prepared with the Langmuir-Schaeffer (LS) method and characterized by means of AFM, optical profilometry, steady-state absorption, emission, fluorescence lifetime, and transient photovoltage measurements. The columnar aggregates observed previously in PDI12 solutions and in spin-coated films persist also in LS films. Because of the specific conditions during the preparation of the LS film, i.e., hydrophobic interactions and lateral compression, the columnar aggregates seem to organize with their long axis perpendicular to the layer plane whereas in spin-coated films the columns were oriented parallel to the layer plane. According to AFM and profilometer results, the thickness of LS monolayer of PDI12 is 10 nm, indicating that it consists mainly of aggregates, each containing approximately 30 monomers. Intermolecular photoinduced energy and electron transfer processes in C(60)|PDI12 double layer junction were studied. The fluorescence lifetime of PDI12 film is exceptionally long, but the quenching is very efficient in the presence of C(60). In charge transfer studies, long-lived photovoltage signal was observed for the double layer. Results of this work indicate that PDI12 acts as an electron acceptor and fullerene C(60) as an electron donor. PMID:20025208

Tolkki, Antti; Vuorimaa, Elina; Chukharev, Vladimir; Lemmetyinen, Helge; Ihalainen, Petri; Peltonen, Jouko; Dehm, Volker; Würthner, Frank

2010-05-01

8

Jet-like structure in the reaction gammap-->pi+pi-pi+pi-pi+pi-p  

Microsoft Academic Search

We report on diffractive production of 6pi systems with a continuum of masses from 2 to 5 GeV\\/c2 in the reaction gammap-->pi+pi-pi+pi-pi+pi-p. The event structure is compared in detail with Monte Carlo studies of pT limited phase space, and with the jets observed in hadronic systems produced by electron-positron annihilation. Strong similarities are found. For this jet-like structure of the

D. Aston; M. Atkinson; R. Bailey; A. H. Ball; B. Bouquet; G. R. Brookes; J. Bröring; P. J. Bussey; D. Clarke; A. B. Clegg; B. D'Almagne; G. de Rosny; B. Diekmann; A. Donnachie; M. Draper; B. Drevillon; I. P. Duerdoth; J.-P. Dufey; R. J. Ellison; D. Ezra; P. Feller; A. Ferrer; P. J. Flynn; F. Friese; W. Galbraith; R. George; S. D. M. Gill; M. Goldberg; S. Goodman; W. Graves; B. Grossetête; P. G. Hampson; K. Heinloth; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; M. Jung; S. Katsanevas; M. A. R. Kemp; F. Kovacs; B. R. Kumar; G. D. Lafferty; J.-M. Lévy; V. Liebenau; J. Litt; D. Mercer; J. V. Morris; K. Müller; D. Newton; E. Paul; P. Petroff; Y. Pons; C. Raine; F. Richard; R. Richter; J. H. C. Roberts; P. Roudeau; A. Rougé; M. Rumpf; M. Sené; I. O. Skillicorn; J. C. Sleeman; K. M. Smith; C. Steinhauer; K. M. Storr; R. J. Thompson; D. Treille; Ch. de La Vaissière; H. Videau; I. Videau; A. P. Waite; A. Wijangco; W. Wojcik; J.-P. Wuthrick; T. P. Yiou

1980-01-01

9

Relevance of final state interactions in {eta}{sup '{yields}{eta}{pi}{pi}} decays  

SciTech Connect

A study of the {eta}{sup '{yields}{eta}{pi}{pi}} Dalitz plot distribution is presented in this talk. The size of the branching ratio is properly understood within U(3) Chiral Perturbation Theory and Resonance Chiral Theory, in the framework of the 1/N{sub C} expansion. Nonetheless, unitarity effects must be incorporated in order to achieve an appropriate description of the Dalitz slope parameters. After taking the final state interactions into account, our predictions become now in agreement with the available experimental measurements, although some clear differences show up with respect to previous theoretical estimates.

Sanz-Cillero, J. J. [Istituto Nazionale di Fisica Nucleare INFN, Sezione di Bari, Via Orabona 4, I-70126 Bari (Italy)

2011-05-23

10

Enhancement of {pi}A{r_arrow}{pi}{pi}A threshold cross sections by in-medium {pi}{pi} final state interactions  

SciTech Connect

We address the problem of pion production in low-energy {pi}-nucleus collisions. For the production mechanism, we assume a simple model consisting of a coherent sum of single pion exchange and the excitation{emdash}followed by the decay into two pions and a nucleon{emdash}of the N{sup {asterisk}}(1440) resonance. The production amplitude is modified by the final state interaction between the pions calculated using the chirally improved J{umlt u}lich meson exchange model including the polarization of the nuclear medium by the pions. The model reproduces well the experimentally observed {pi}A{r_arrow}{pi}{pi}A cross sections, especially the enhancement with increasing {ital A} of the {pi}{sup +}{pi}{sup {minus}} mass distribution in the threshold region. {copyright} {ital 1999} {ital The American Physical Society}

Rapp, R. [Department of Physics and Astronomy, SUNY at Stony Brook, Stony Brook, New York 11794-3800 (United States); Durso, J.W.; Krehl, O.; Speth, J. [Physics Department, Mount Holyoke College, South Hadley, Massachusetts 01075 (United States); Durso, J.W. [Institut fuer Kernphysik, Forschungszentrum Juelich GmbH, D-52425 Juelich (Germany); Aouissat, Z.; Wambach, J. [Institut fuer Kernphysik, Schlossgartenstrasse 9, TU-Darmstadt, D-64289 Darmstadt (Germany); Chanfray, G. [IPN, IN2P3-CNRS/Universite Claude Bernard Lyon I, 43 Boulevard du 11 Novembre 1918 F-69622 Villeurbanne Cedex (France); Schuck, P. [ISN, IN2P3-CNRS/Universite Joseph Fourier, 53 Avenue de Martyrs, F-38026 Grenoble Cedex (France)

1999-03-01

11

The inter-ring sigma/(pi/pi) covalent interactions of cyclodimes of benzenes.  

PubMed

To study the inter-ring sigma/(pi/pi) covalent interactions between non-radical pi-systems, five structures of cyclodimers of benzene (C6H6)2 with all the real frequencies, i.e. o-p'-dibenzene (), the pentacyclic dimer (), p-p'-dibenzene (), syn-o,o'-dibenzene (), and hexaprismane (), are obtained at the MP2/6-311G(d,p) level. Five inter-ring bonding mode types forming the inter-ring multicenter multielectron sigma/(pi/pi) covalent bonds are represented: , ring-edge type between a butterfly-shaped ring and a planar ring (4-center 4-electron bond); , edge-edge and ring-ring types between two identical butterfly-shaped rings (8-center 8-electron bond); , ring-ring type between two identical butterfly-shaped rings (4-center 4-electron bond); , edge-edge type between two identical planar rings (4-center 4-electron bond); and , face-face type between two identical planar rings (12-center 12-electron bond). The order of the large inter-ring interaction energies at the MP2/6-311+G(3d, 2p)+BF level is -99.15 (with two inter-ring C-C bonds)> -98.57 (with four C-C bonds)>-85.76 (with two C-C bonds)>-61.35 (with two C-C bonds)>-60.40 kcal mol(-1) (with six C-C bonds). However, this does not show an obvious relationship between the interaction energy and the number of the inter-ring C-C bonds. The reason is that the number of decisive influencing factors of the inter-ring interaction energy is not one but five: the number of the favorable inter-ring C-C single bonds, the number of the unfavorable four-membered rings themselves, the participating number of the four-membered rings in unfavorable interaction among those rings, the number of the favorable non-planar melted six-membered ring, and the weak inter-ring pi/pi interaction (between two pi bonds in different rings). PMID:19283262

Wang, Yin-Feng; Li, Zhi-Ru; Wang, Fang-Fang; Sun, Chia-Chung

2008-11-06

12

K{pi} form factors, final state interactions and D{sup +{yields}}K{sup -{pi}+{pi}+} decays  

SciTech Connect

We present a model for the decay D{sup +{yields}}K{sup -{pi}+}p{sup +}. The weak interaction part of this reaction is described using the effective weak Hamiltonian in the factorisation approach. Hadronic final state interactions are taken into account through the K{pi} scalar and vector form factors fulfilling analyticity, unitarity and chiral symmetry constraints. Allowing for a global phase difference between the S and P waves of -65 deg., the Dalitz plot of the D{sup +{yields}}K{sup -{pi}+{pi}+} decay, the K{pi} invariant mass spectra and the total branching ratio due to S-wave interactions are well reproduced.

Boito, D. R.; Escribano, R. [Grup de Fisica Teorica and IFAE, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona) (Spain)

2010-08-05

13

Luminescent alkynylplatinum(II) terpyridyl metallogels stabilized by Pt...Pt, pi-pi, and hydrophobic-hydrophobic interactions.  

PubMed

A series of luminescent alkynylplatinum(II) terpyridyl complexes have been synthesized and characterized by 1H NMR, IR, FAB-mass spectrometry, and elemental analysis; one of the platinum(III) complexes has also been structurally characterized by X-ray crystallography. Their electrochemical and photophysical properties have also been investigated. A majority of the complexes were able to form stable thermoreversible metallogels in organic solvents, tested by the "stable-to-inversion of a test tube" method. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) of the xerogels showed typical fibrous structures on the micrometer scale. Interestingly, whereas 2-OTf, 3-OTf, and 5-PF6 formed thermotropic metallogels mainly through van der Waals' forces with different emission colors, 1-X (X = OTf, BF4, PF6, and ClO4) showed additional Pt...Pt and pi-pi interactions to stabilize the resultant metallogels and showed drastic color changes during the gel-to-sol phase transition. The metallogels of 1-X were also different colors, depending on the nature of the counter anions, which governs the degree of aggregation and the extent of Pt...Pt and pi-pi interactions involved in the gelation process. This property may be utilized to serve as an effective reporter for microenvironmental changes. PMID:19499924

Tam, Anthony Yiu-Yan; Wong, Keith Man-Chung; Zhu, Nianyong; Wang, Guoxin; Yam, Vivian Wing-Wah

2009-08-01

14

Observation of eta' decays to pi+pi-pi0 and pi+pi-e+e-.  

PubMed

Using psi(2S)-->pi;{+}pi;{-}J/psi, J/psi-->gammaeta;{'} events acquired with the CLEO-c detector at the CESR e;{+}e;{-} collider, we make the first observations of the decays eta;{'}-->pi;{+}pi;{-}pi;{0} and eta;{'}-->pi;{+}pi;{-}e;{+}e;{-}, measuring absolute branching fractions (37_{-9};{+11}+/-4)x10;{-4} and (25_{-9};{+12}+/-5)x10;{-4}, respectively. For eta;{'}-->pi;{+}pi;{-}pi;{0}, this result probes the mechanism of isospin violation and the roles of pi;{0}/eta/eta;{'}-mixing and final state rescattering in strong decays. We also set upper limits on branching fractions for eta;{'} decays to pi;{+}pi;{-}micro;{+}micro;{-}, 2(pi;{+}pi;{-}), pi;{+}pi;{-}2pi;{0}, 2(pi;{+}pi;{-})pi;{0}, 3(pi;{+}pi;{-}), and invisible final states. PMID:19257578

Naik, P; Rademacker, J; Asner, D M; Edwards, K W; Reed, J; Robichaud, A N; Tatishvili, G; Briere, R A; Vogel, H; Onyisi, P U E; Rosner, J L; 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-Krüger, H; Mohapatra, D; Patterson, J R; Peterson, D; Riley, D; Ryd, A; Sadoff, A J; Shi, X; Stroiney, S; Sun, W M; Wilksen, T; Athar, S B; Yelton, J; Rubin, P; Mehrabyan, S; Lowrey, N; Selen, M; White, E J; Wiss, J; Mitchell, R E; Shepherd, M R; Besson, D; Pedlar, T K; Cronin-Hennessy, D; Gao, K Y; Hietala, J; Kubota, Y; Klein, T; Poling, R; Scott, A W; Zweber, P; Dobbs, S; Metreveli, Z; Seth, K K; Tan, B J Y; Tomaradze, A; Libby, J; Martin, L; Powell, A; Wilkinson, G; Mendez, H; Ge, J Y; Miller, D H; Pavlunin, V; Sanghi, B; Shipsey, I P J; Xin, B; Adams, G S; Hu, D; Moziak, B; Napolitano, J; He, Q; Insler, J; Muramatsu, H; Park, C S; Thorndike, E H; Yang, F; Artuso, M; Blusk, S; Khalil, S; Li, J; Mountain, R; Randrianarivony, K; Sultana, N; Skwarnicki, T; Stone, S; Wang, J C; Zhang, L M; Bonvicini, G; Cinabro, D; Dubrovin, M; Lincoln, A; Ecklund, K M

2009-02-11

15

Aromatic pi-pi interaction mediated by a metal atom: structure and ionization of the bis(eta(6)-benzene)chromium-benzene cluster.  

PubMed

Aromatic pi-pi interaction in the presence of a metal atom has been investigated experimentally and theoretically with the model system of bis(eta(6)-benzene)chromium-benzene cluster (Cr(Bz)(2)-Bz) in which a free solvating benzene is non-covalently attached to the benzene moiety of Cr(Bz)(2). One-photon mass-analyzed threshold ionization (MATI) spectroscopy and first principles calculations are employed to identify the structure of Cr(Bz)(2)-Bz which adopts the parallel-displaced configuration. The decrease in ionization potential for Cr(Bz)(2)-Bz compared with Cr(Bz)(2), resulting from the increase of the cation-pi stabilization energy upon ionization, is consistent with the parallel-displaced structure of the cluster. Theoretical calculations give the detailed cluster structures with associated energetics, thus revealing the nature of pi-pi-metal or pi-pi-cation interactions at the molecular level. PMID:20523949

Han, Songhee; Singh, N Jiten; Kang, Tae Yeon; Choi, Kyo-Won; Choi, Sunyoung; Baek, Sun Jong; Kim, Kwang S; Kim, Sang Kyu

2010-06-04

16

Method-dependent relative stability of hydrogen bonded and [pi]-[pi] stacked structures of the formic acid tetramer  

NASA Astrophysics Data System (ADS)

One H-bonded (planar) and one stacked (vertical) structures of the formic acid tetramer were investigated using extended basis sets at the HF, B3LYP, PW91PW91, and MP2 levels of theory. At the HF, B3LYP, and PW91PW91 theoretical levels, the H-bonded structure is more stable than the stacked one. At the ab initio MP2 correlated level, the stacked structure is more stable than the H-Bonded one.

Wang, Weizhou

2005-01-01

17

Observation of eta_c(1S) and eta_c(2S) decays to K K-pi pi-pi0 in two-photon interactions  

SciTech Connect

We study the processes {gamma}{gamma} {yields} K{sub S}{sup 0}K{sup {+-}}{pi}{sup {-+}} and {gamma}{gamma} {yields} K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup 0} using a data sample of 519.2 fb{sup -1} recorded by the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at center-of-mass energies near the {Upsilon}(nS) (n = 2, 3, 4) resonances. We observe the {eta}{sub c}(1S), {chi}{sub c0}(1P), {chi}{sub c2}(1P), and {eta}{sub c}(2S) resonances produced in two-photon interactions and decaying to K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup 0}, with significances of 18.1, 5.7, 5.2, and 5.3 standard deviations (including systematic errors), respectively. We measure the {eta}{sub c}(2S) mass and width in K{sub S}{sup 0}K{sup {+-}}{pi}{sup {-+}} decays, m({eta}{sub c}(2S)) = 3638.5 {+-} 1.5 {+-} 0.8 MeV/c{sup 2} and {Lambda}({eta}{sub c}(2S)) = 13.4 {+-} 4.6 {+-} 3.2 MeV, where the first uncertainty is statistical and the second is systematic. We search for the Z(3930) resonance and find no significant signal. We also provide the two-photon width times branching fraction values for the observed resonances.

Sanchez, P.del Amo

2011-05-20

18

Observation of the phi-->pi+pi- pi+pi- decay  

Microsoft Academic Search

Using 11.6 pb-1 of data collected in the energy range 0.984-1.06 GeV by CMD-2 at VEPP-2M, the cross section of the reaction e+e--->pi+pi- pi+pi- has been studied. For the first time an interference pattern was observed in the energy dependence of the cross section near the \\/phi meson. The branching ratio of the phi-->pi+pi-pi+pi- decay double suppressed by the G-parity

R. R. Akhmetshin; E. V. Anashkin; M. Arpagaus; V. M. Aulchenko; V. Sh. Banzarov; L. M. Barkov; N. S. Bashtovoy; A. E. Bondar; D. V. Bondarev; A. V. Bragin; D. V. Chernyak; S. I. Eidelman; G. V. Fedotovitch; N. I. Gabyshev; A. A. Grebeniuk; D. N. Grigoriev; V. W. Hughes; F. V. Ignatov; P. M. Ivanov; S. V. Karpov; V. F. Kazanin; B. I. Khazin; I. A. Koop; M. S. Korostelev; P. P. Krokovny; L. M. Kurdadze; A. S. Kuzmin; I. B. Logashenko; P. A. Lukin; K. Yu. Mikhailov; A. I. Milstein; I. N. Nesterenko; V. S. Okhapkin; A. V. Otboev; E. A. Perevedentsev; A. S. Popov; T. A. Purlatz; S. I. Redin; N. I. Root; A. A. Ruban; N. M. Ryskulov; A. G. Shamov; Yu. M. Shatunov; B. A. Shwartz; A. L. Sibidanov; V. A. Sidorov; A. N. Skrinsky; V. P. Smakhtin; I. G. Snopkov; E. P. Solodov; P. Yu. Stepanov; A. I. Sukhanov; J. A. Thompson; V. M. Titov; A. A. Valishev; Yu. V. Yudin; S. G. Zverev

2000-01-01

19

Study of the process e+e--- >pi+pi- pi+pi- pi0 with the CMD2 detector  

Microsoft Academic Search

The process e+e--->pi+pi- pi+pi-pi0 has been studied in the center of mass energy range 1280 - 1380 MeV using 3.0 pb-1 of data collected with the CMD-2 detector in Novosibirsk. Analysis shows that the cross section of the five pion production is dominated by the contributions of the etapi+pi- and omegapi+pi- intermediate states.

R. R. Akhmetshin; E. V. Anashkin; V. M. Aulchenko; V. S. Banzarov; L. M. Barkov; S. E. Baru; A. E. Bondar; A. V. Bragin; D. V. Chernyak; S. I. Eidelman; N. S. Bashtovoy; G. V. Fedotovich; N. I. Gabyshev; A. A. Grebeniuk; D. N. Grigoriev; F. V. Ignatov; P. M. Ivanov; S. V. Karpov; V. F. Kazanin; B. I. Khazin; I. A. Koop; P. P. Krokovny; L. M. Kurdadze; A. S. Kuzmin; I. B. Logashenko; P. A. Lukin; A. P. Lysenko; K. Y. Mikhailov; A. I. Milstein; I. N. Nesterenko; V. S. Okhapkin; E. A. Perevedentsev; A. A. Polunin; A. S. Popov; T. A. Purlatz; N. I. Root; A. A. Ruban; N. M. Ryskulov; A. G. Shamov; Y. M. Shatunov; B. A. Shwartz; A. L. Sibidanov; V. A. Sidorov; A. N. Skrinsky; V. P. Smakhtin; I. G. Snopkov; E. P. Solodov; P. Y. Stepanov; A. I. Sukhanov; Y. V. Yudin; S. G. Zverev; J. A. Thompson

2000-01-01

20

Study of the D{sup 0{yields}{pi}+{pi}-{pi}0} decay at BABAR  

SciTech Connect

The Dalitz-plot of the decay D{sup 0{yields}{pi}+{pi}-{pi}0} measured by the BABAR collaboration shows the structure of a final state having quantum numbers I{sup G}J{sup PC} = 0{sup -}0{sup --}. An isospin analysis of this Dalitz-plot finds that the fraction of the I = 0 contribution is about 96%. This high I = 0 contribution is unexpected because the weak interaction violates the isospin.

Gaspero, Mario [Dipartimento di Fisica, Sapienza Universita di Roma (Italy) and Istituto Nazionale di Fisica Nucleare, Sezione di Roma 1, Piazzale Aldo Moro 2, I-00185, Rome (Italy)

2010-08-05

21

Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at sNN=200 GeV at the STAR detector  

Microsoft Academic Search

We present a measurement of pi+pi-pi+pi- photonuclear production in ultraperipheral Au-Au collisions at sNN=200 GeV from the STAR experiment. The pi+pi-pi+pi- final states are observed at low transverse momentum and are accompanied by mutual nuclear excitation of the beam particles. The strong enhancement of the production cross section at low transverse momentum is consistent with coherent photoproduction. The pi+pi-pi+pi- invariant

B. I. Abelev; M. M. Aggarwal; Z. Ahammed; A. V. Alakhverdyants; B. D. Anderson; D. Arkhipkin; G. S. Averichev; J. Balewski; L. S. Barnby; S. Baumgart; D. R. Beavis; R. Bellwied; F. Benedosso; M. J. Betancourt; R. R. Betts; A. Bhasin; A. K. Bhati; H. Bichsel; J. Bielcik; J. Bielcikova; B. Biritz; L. C. Bland; B. E. Bonner; J. Bouchet; E. Braidot; A. V. Brandin; A. Bridgeman; E. Bruna; S. Bueltmann; I. Bunzarov; T. P. Burton; X. Z. Cai; H. Caines; M. Calderón de La Barca Sánchez; O. Catu; D. Cebra; R. Cendejas; M. C. Cervantes; Z. Chajecki; P. Chaloupka; S. Chattopadhyay; H. F. Chen; J. H. Chen; J. Cheng; M. Cherney; A. Chikanian; K. E. Choi; W. Christie; P. Chung; S. U. Chung; R. F. Clarke; M. J. M. Codrington; R. Corliss; J. G. Cramer; H. J. Crawford; D. Das; S. Dash; A. Davila Leyva; L. C. de Silva; R. R. Debbe; T. G. Dedovich; M. Dephillips; A. A. Derevschikov; R. Derradi de Souza; L. Didenko; P. Djawotho; S. M. Dogra; X. Dong; J. L. Drachenberg; J. E. Draper; J. C. Dunlop; M. R. Dutta Mazumdar; L. G. Efimov; E. Elhalhuli; M. Elnimr; J. Engelage; G. Eppley; B. Erazmus; M. Estienne; L. Eun; O. Evdokimov; P. Fachini; R. Fatemi; J. Fedorisin; R. G. Fersch; P. Filip; E. Finch; V. Fine; Y. Fisyak; C. A. Gagliardi; D. R. Gangadharan; M. S. Ganti; E. J. Garcia-Solis; A. Geromitsos; F. Geurts; V. Ghazikhanian; P. Ghosh; Y. N. Gorbunov; A. Gordon; O. Grebenyuk; D. Grosnick; B. Grube; S. M. Guertin; A. Gupta; N. Gupta; W. Guryn; B. Haag; T. J. Hallman; A. Hamed; L.-X. Han; J. W. Harris; J. P. Hays-Wehle; M. Heinz; S. Heppelmann; A. Hirsch; E. Hjort; A. M. Hoffman; G. W. Hoffmann; D. J. Hofman; R. S. Hollis; H. Z. Huang; T. J. Humanic; L. Huo; G. Igo; A. Iordanova; P. Jacobs; W. W. Jacobs; P. Jakl; C. Jena; F. Jin; C. L. Jones; P. G. Jones; J. Joseph; E. G. Judd; S. Kabana; K. Kajimoto; K. Kang; J. Kapitan; K. Kauder; D. Keane; A. Kechechyan; D. Kettler; D. P. Kikola; J. Kiryluk; A. Kisiel; S. R. Klein; A. G. Knospe; A. Kocoloski; D. D. Koetke; T. Kollegger; J. Konzer; M. Kopytine; I. Koralt; W. Korsch; L. Kotchenda; V. Kouchpil; P. Kravtsov; K. Krueger; M. Krus; L. Kumar; P. Kurnadi; M. A. C. Lamont; J. M. Landgraf; S. Lapointe; J. Lauret; A. Lebedev; R. Lednicky; C.-H. Lee; J. H. Lee; W. Leight; M. J. Levine; C. Li; L. Li; N. Li; W. Li; X. Li; Y. Li; Z. Li; G. Lin; S. J. Lindenbaum; M. A. Lisa; F. Liu; H. Liu; J. Liu; T. Ljubicic; W. J. Llope; R. S. Longacre; W. A. Love; Y. Lu; G. L. Ma; Y. G. Ma; D. P. Mahapatra; R. Majka; O. I. Mall; L. K. Mangotra; R. Manweiler; S. Margetis; C. Markert; H. Masui; H. S. Matis; Yu. A. Matulenko; D. McDonald; T. S. McShane; A. Meschanin; R. Milner; N. G. Minaev; S. Mioduszewski; A. Mischke; M. K. Mitrovski; B. Mohanty; M. M. Mondal; D. A. Morozov; M. G. Munhoz; B. K. Nandi; C. Nattrass; T. K. Nayak; J. M. Nelson; P. K. Netrakanti; M. J. Ng; L. V. Nogach; S. B. Nurushev; G. Odyniec; A. Ogawa; H. Okada; V. Okorokov; D. Olson; M. Pachr; B. S. Page; S. K. Pal; Y. Pandit; Y. Panebratsev; T. Pawlak; T. Peitzmann; V. Perevoztchikov; C. Perkins; W. Peryt; S. C. Phatak; P. Pile; M. Planinic; M. A. Ploskon; J. Pluta; D. Plyku; N. Poljak; A. M. Poskanzer; B. V. K. S. Potukuchi; C. B. Powell; D. Prindle; C. Pruneau; N. K. Pruthi; P. R. Pujahari; J. Putschke; R. Raniwala; S. Raniwala; R. L. Ray; R. Redwine; R. Reed; J. M. Rehberg; H. G. Ritter; J. B. Roberts; O. V. Rogachevskiy; J. L. Romero; A. Rose; C. Roy; L. Ruan; M. J. Russcher; R. Sahoo; S. Sakai; I. Sakrejda; T. Sakuma; S. Salur; J. Sandweiss; E. Sangaline; J. Schambach; R. P. Scharenberg; N. Schmitz; T. R. Schuster; J. Seele; J. Seger; I. Selyuzhenkov; P. Seyboth; E. Shahaliev; M. Shao; M. Sharma; S. S. Shi; E. P. Sichtermann; F. Simon; R. N. Singaraju; M. J. Skoby; N. Smirnov; P. Sorensen; J. Sowinski; H. M. Spinka; B. Srivastava; T. D. S. Stanislaus; D. Staszak; J. R. Stevens; R. Stock; M. Strikhanov; B. Stringfellow; A. A. P. Suaide; M. C. Suarez; N. L. Subba; M. Sumbera; X. M. Sun; Y. Sun; Z. Sun; B. Surrow; T. J. M. Symons; A. Szanto de Toledo; J. Takahashi; A. H. Tang; Z. Tang; L. H. Tarini; T. Tarnowsky; D. Thein; J. H. Thomas; J. Tian; A. R. Timmins; S. Timoshenko; D. Tlusty; M. Tokarev; T. A. Trainor; V. N. Tram; S. Trentalange; R. E. Tribble; O. D. Tsai; J. Ulery; T. Ullrich; D. G. Underwood; G. van Buren; G. van Nieuwenhuizen; J. A. Vanfossen Jr.; R. Varma; G. M. S. Vasconcelos; A. N. Vasiliev; F. Videbaek; Y. P. Viyogi; S. Vokal; S. A. Voloshin; M. Wada; M. Walker; F. Wang; G. Wang; H. Wang; J. S. Wang; Q. Wang; X. Wang; Y. Wang; G. Webb; J. C. Webb; G. D. Westfall; C. Whitten Jr.; H. Wieman; E. Wingfield; S. W. Wissink; R. Witt; Y. Wu; W. Xie; N. Xu; Q. H. Xu; W. Xu; Y. Xu; Z. Xu; L. Xue; Y. Yang; P. Yepes; K. Yip; I.-K. Yoo; Q. Yue; M. Zawisza; H. Zbroszczyk; W. Zhan; S. Zhang; W. M. Zhang; X. P. Zhang; Y. Zhang; Z. P. Zhang; J. Zhao; C. Zhong; J. Zhou; W. Zhou; X. Zhu; Y. H. Zhu

2010-01-01

22

The e+e--->2(pi+pi-)pi0, 2(pi+pi-)eta, K+K-pi+pi-pi0 and K+K-pi+pi-eta cross sections measured with initial-state radiation  

Microsoft Academic Search

We study the processes e+e--->2(pi+pi-)pi0gamma, 2(pi+pi-)etagamma, K+K-pi+pi-pi0gamma and K+K-pi+pi-etagamma with the hard photon radiated from the initial state. About 20 000, 4300, 5500, and 375 fully reconstructed events, respectively, are selected from 232fb-1 of BABAR data. The invariant mass of the hadronic final state defines the effective e+e- center-of-mass energy, so that the obtained cross sections from the threshold to

B. Aubert; M. Bona; D. Boutigny; 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; 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; I. L. Osipenkov; M. T. Ronan; K. Tackmann; T. Tanabe; W. A. Wenzel; P. Del Amo Sanchez; C. M. Hawkes; 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; 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; S. D. Foulkes; J. W. Gary; F. Liu; O. Long; B. C. Shen; G. M. Vitug; L. Zhang; 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; T. Schalk; B. A. Schumm; A. Seiden; M. G. Wilson; L. O. Winstrom; E. Chen; C. H. Cheng; 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; S. Chen; W. T. Ford; J. F. Hirschauer; A. Kreisel; M. Nagel; U. Nauenberg; A. Olivas; J. G. Smith; K. A. Ulmer; S. R. Wagner; J. Zhang; A. M. Gabareen; A. Soffer; W. H. Toki; R. J. Wilson; F. Winklmeier; 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; F. Muheim; S. Playfer; A. I. Robertson; J. E. Watson; Y. Xie; 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; J. Wu; R. S. Dubitzky; J. Marks; S. Schenk; U. Uwer; D. J. Bard; P. D. Dauncey; R. L. Flack; 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; G. Grosdidier; A. Höcker; V. Lepeltier; F. Le Diberder; A. M. Lutz; S. Pruvot; S. Rodier; 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; K. C. Schofield; 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; J. Allison; D. Bailey; 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; G. Blaylock; 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; Y. Zheng; 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; F. Fabozzi; 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; 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

2007-01-01

23

Finite volume corrections to pi pi scattering  

SciTech Connect

Lattice QCD studies of hadron-hadron interactions are performed by computing the energy levels of the system in a finite box. The shifts in energy levels proportional to inverse powers of the volume are related to scattering parameters in a model independent way. In addition, there are non-universal exponentially suppressed corrections that distort this relation. These terms are proportional to e-m{sub pi} L and become relevant as the chiral limit is approached. In this paper we report on a one-loop chiral perturbation theory calculation of the leading exponential corrections in the case of I=2 pi pi scattering near threshold.

Sato, Ikuro; Bedaque, Paulo F.; Walker-Loud, Andre

2006-01-13

24

Effect of intramolecular pi-pi and CH-pi interactions between ligands on structure, electrochemical and spectroscopic properties of fac-[Re(bpy)(CO)3(PR3)]+(bpy = 2,2'-bipyridine; PR3= trialkyl or triarylphosphines).  

PubMed

Intramolecular pi-pi and CH-pi interactions between the bpy and PR3 ligands of fac-[Re(bpy)(CO)3(PR3)]+ affect their structure, and electrochemical and spectroscopic properties. Intramolecular CH-pi interaction was observed between the alkyl groups on the phosphine ligand (R =nBu, Et) and the bpy ligand, and intramolecular pi-pi and CH-pi interactions were both observed between the aryl group(s) on the phosphorus ligand (R =p-MeOPh, p-MePh, Ph, p-FPh, OPh) and the bpy ligand, while no such interactions were found in the trialkylphosphite complexes (R = OiPr, OEt, OMe). The intramolecular interactions distort the pyridine rings of the bpy ligand as long as 3.7 x 10(-2)A in crystals. Molecular orbital calculations of the bpy ligand suggest that this distortion decreases the energy gap between its pi and pi* orbitals. An absorption band attributed to the pi-pi*(bpy) transition of the distorted rhenium complexes, measured in a KBr pellet, was red-shifted by 1-5 nm compared to the complexes without the distorted bpy ligand. Even in solution, similar red shifts of the pi-pi*(bpy) absorption were observed. The redox potential E1/2(bpy/bpy*-) of the complexes with the trialkylphosphine and triarylphosphine ligand are shifted positively by 110-120 mV and 60-80 mV respectively, compared with those derived from the electron-attracting property of the phosphorus ligand. In contrast with these properties, three nu(CO) IR bands, which are sensitive to the electron density on the central rhenium because of pi-back bonding, were shifted to higher energy, and a Re(I/II)-based oxidation wave was observed at a more positive potential according to the electron-attracting property of the phosphorus ligand. PMID:15616731

Tsubaki, Hideaki; Tohyama, Shigeki; Koike, Kazuhide; Saitoh, Hideki; Ishitani, Osamu

2004-12-06

25

Cadmium(II) and cobalt(II) complexes generated from benzimidazole-5-carboxylate: Self-assembly by hydrogen bonding and {pi}-{pi} interactions  

SciTech Connect

Self-assembly of L{sup -} (HL=benzimidazole-5-carboxylic acid) with Cd(II) and Co(II), respectively, by layer-separating diffusion method at ambient temperature gives rise to two new supramolecular architectures [(CdL{sub 2}.H{sub 2}O).2CH{sub 3}OH]{sub n} (1) and {l_brace}[CoL{sub 2}(H{sub 2}O){sub 2}].2H{sub 2}O{r_brace}{sub n} (2), both of which are stabilized by the hydrogen bonding interactions and the intermolecular {pi}-{pi} interactions. 1 crystallizes in the triclinic system, space group P-1, with cell parameters M=516.78, a=9.084(2)A, b=10.063(10)A, c=11.533(8)A, {alpha}=90.21(11){sup o}, {beta}=99.48(6){sup o}, {gamma}=98.34(9){sup o}, V=1028.4(12)A{sup 3}, Z=2, R{sub 1}[I>2{sigma}(I)]=0.0257, wR{sub 2}[I>2{sigma}(I)]=0.0719. 2 crystallizes in the monoclinic system, space group C2/c, with cell parameters M=453.27, a=16.119(2)A, b=8.8952(13)A, c=14.195(2)A, {beta}=118.507(2){sup o}, V=1788.5(4)A{sup 3}, Z=4, R{sub 1}[I>2{sigma}(I)]=0.0802, wR{sub 2}[I>2{sigma}(I)]=0.1515. Complex 1 displays a remarkable three-dimensional (3-D) structure with unusual channels generated from the interlayer voids. Complex 2 exhibits the 3-D structure consisting of 1-D zigzag chains. The thermal and fluorescence properties associated with their crystal structures have been measured, and complex 1 displays intense blue emission in the solid state.

Liu Zheng [Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100039 (China); Chen Yun [Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100039 (China); Liu Ping [Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 (China)]. E-mail: pliu@ms.fjirsm.ac.cn; Wang Jian [Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100039 (China); Huang Meihua [Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100039 (China)

2005-07-15

26

Could linear solvation energy relationships give insights into chiral recognition mechanisms? 1. Pi-pi and charge interaction in the reversed versus the normal phase mode.  

PubMed

Linear solvation energy relationships (LSER) have been used for years in liquid chromatography to access the factors that lead to retention and, more recently, to selectivity. In chiral separations, two enantiomers will receive exactly the same descriptors correctly predicting that they will not be separated by any non-chiral stationary phase. However, LSER studies could be used considering that each enantiomer sees a chiral stationary phase (CSP) differently. Working with the enantioselectivity factor, k'2lk'1 could give interesting information on the chiral recognition mechanisms. The b and v system parameters always predominantly contribute to a solute's retention in reversed phase liquid chromatography (RPLC) compared to the a, e and s parameters. However, these minor parameters for retention may become the essential ones for enantiomeric separations where a minimum of three simultaneous interactions is needed for an enantioseparation to occur. In this non-chiral study, six different stationary phases, a classical C(18), a diphenyl bonded stationary phase (DP), a polystyrene-divinylbenzene (DVB), a polar embedded new stationary phase, an anion exchanger (SAX) and a teicoplanin aglycone (TAG) CSP were studied with achiral test solutes. Significantly higher e terms were obtained for the SAX and TAG columns. It seems that the ability of stationary surface charges to induce dipoles in polarizable molecules is encoded mainly in the e term. Since the DP and DVB columns did not produce e parameters significantly higher than the C(18) column, it seems that pi-pi interactions are (a) extremely weak in RPLC or (b) they are not simply encoded in this single e system parameter but spread in at least three parameters. The TAG CSP produced logically very different parameters when used in the reversed phase mode compared to the normal phase mode showing the critical role of the mobile phase. PMID:17719054

Berthod, Alain; Mitchell, Clifford R; Armstrong, Daniel W

2007-08-06

27

Novel nanoparticles generated by polymeric amphiphiles with pi-pi conjugated small molecules for anti-tumor drug delivery.  

PubMed

In recent years, the self-assembly polymeric nanoparticles are widely used for anti-tumor drug delivery. Multiple interactions such as hydrogen bonding, host-guest interaction, hydrophobic interaction and electrostatic interaction have been utilized to generate the nanoparticles. Herein, a new polymeric amphiphile with methoxy poly(ethylene glycol) (mPEG) as hydrophilic block and pi-pi conjugated small molecule N-(9-Fluorenylmethoxycarbonyl)-L-phenylalanines (Fmoc-Phe-OH) instead of hydrophobic polymer chain as lipophilic segment was synthesized. Anti-tumor drug doxorubicin (DOX) was trapped in the self-assembly nanoparticles via the dual hydrophobic and pi-pi stacking interactions. The synthesis and morphology of the self-assembly nanoparticles were studied. The interactions between drug and carrier, release profile, cellular uptake and in vitro anti-tumor efficiency of the drug loaded nanoparticles were investigated in details. The results showed that the amphiphiles self-assembled into spindle nanoparticles with the size around 200 nanometers. The pi-pi stacking interaction between DOX and Fmoc-Phe-OH achieved great performance for the efficient drug encapsulation. The DOX could be sustaingly released for 50 hours. The drug loaded nanoparticles were internalized in HepG2 cancer cells efficiently and exhibited good anti-tumor activity in vitro. The nanoparticles generated by mPEG-Phe-Fmoc amphiphiles provided a new strategy to fabricate polymeric nanoparticles for anti-tumor drug delivery. PMID:23926799

Deng, Xin; Xu, Xianghui; Lai, Yusi; He, Bin; Gu, Zhongwei

2013-08-01

28

Observation of pi(+)pi(-)pi(+)pi(-) photoproduction in ultraperipheral heavy-ion collisions at root s(NN)=200 GeV at the STAR detector  

Microsoft Academic Search

We present a measurement of pi(+)pi(-)pi(+)pi(-) photonuclear production in ultraperipheral Au-Au collisions at root s(NN) = 200 GeV from the STAR experiment. The pi(+)pi(-)pi(+)pi(-) final states are observed at low transverse momentum and are accompanied by mutual nuclear excitation of the beam particles. The strong enhancement of the production cross section at low transverse momentum is consistent with coherent photoproduction.

B. I. Abelev; M. M. Aggarwal; Z. Ahammed; A. V. Alakhverdyants; B. D. Anderson; D. Arkhipkin; G. S. Averichev; J. Balewski; L. S. Barnby; S. Baumgart; D. R. Beavis; R. Bellwied; F. Benedosso; M. J. Betancourt; R. R. Betts; A. Bhasin; A. K. Bhati; H. Bichsel; J. Bielcik; J. Bielcikova; B. Biritz; L. C. Bland; B. E. Bonner; J. Bouchet; E. Braidot; A. V. Brandin; A. Bridgeman; E. Bruna; S. Bueltmann; I. Bunzarov; T. P. Burton; X. Z. Cai; H. Caines; M. C. D. Sanchez; O. Catu; D. Cebra; R. Cendejas; M. C. Cervantes; Z. Chajecki; P. Chaloupka; S. Chattopadhyay; H. F. Chen; J. H. Chen; J. Cheng; M. Cherney; A. Chikanian; K. E. Choi; W. Christie; P. Chung; S. U. Chung; R. F. Clarke; M. J. M. Codrington; R. Corliss; J. G. Cramer; H. J. Crawford; D. Das; S. Dash; A. D. Leyva; L. C. De Silva; R. R. Debbe; T. G. Dedovich; M. DePhillips; A. A. Derevschikov; R. D. de Souza; L. Didenko; P. Djawotho; S. M. Dogra; X. Dong; J. L. Drachenberg; J. E. Draper; J. C. Dunlop; M. R. D. Mazumdar; L. G. Efimov; E. Elhalhuli; M. Elnimr; J. Engelage; G. Eppley; B. Erazmus; M. Estienne; L. Eun; O. Evdokimov; P. Fachini; R. Fatemi; J. Fedorisin; R. G. Fersch; P. Filip; E. Finch; V. Fine; Y. Fisyak; C. A. Gagliardi; D. R. Gangadharan; M. S. Ganti; E. J. Garcia-Solis; A. Geromitsos; F. Geurts; V. Ghazikhanian; P. Ghosh; Y. N. Gorbunov; A. Gordon; O. Grebenyuk; D. Grosnick; B. Grube; S. M. Guertin; A. Gupta; N. Gupta; W. Guryn; B. Haag; T. J. Hallman; A. Hamed; L. X. Han; J. W. Harris; J. P. Hays-Wehle; M. Heinz; S. Heppelmann; A. Hirsch; E. Hjort; A. M. Hoffman; G. W. Hoffmann; D. J. Hofman; R. S. Hollis; H. Z. Huang; T. J. Humanic; L. Huo; G. Igo; A. Iordanova; P. Jacobs; W. W. Jacobs; P. Jakl; C. Jena; F. Jin; C. L. Jones; P. G. Jones; J. Joseph; E. G. Judd; S. Kabana; K. Kajimoto; K. Kang; J. Kapitan; K. Kauder; D. Keane; A. Kechechyan; D. Kettler; D. P. Kikola; J. Kiryluk; A. Kisiel; S. R. Klein; A. G. Knospe; A. Kocoloski; D. D. Koetke; T. Kollegger; J. Konzer; M. Kopytine; I. Koralt; W. Korsch; L. Kotchenda; V. Kouchpil; P. Kravtsov; K. Krueger; M. Krus; L. Kumar; P. Kurnadi; M. A. C. Lamont; J. M. Landgraf; S. LaPointe; J. Lauret; A. Lebedev; R. Lednicky; C. H. Lee; J. H. Lee; W. Leight; M. J. LeVine; C. Li; L. Li; N. Li; W. Li; X. Li; Y. Li; Z. Li; G. Lin; S. J. Lindenbaum; M. A. Lisa; F. Liu; H. Liu; J. Liu; T. Ljubicic; W. J. Llope; R. S. Longacre; W. A. Love; Y. Lu; G. L. Ma; Y. G. Ma; D. P. Mahapatra; R. Majka; O. I. Mall; L. K. Mangotra; R. Manweiler; S. Margetis; C. Markert; H. Masui; H. S. Matis; Y. A. Matulenko; D. McDonald; T. S. McShane; A. Meschanin; R. Milner; N. G. Minaev; S. Mioduszewski; A. Mischke; M. K. Mitrovski; B. Mohanty; M. M. Mondal; D. A. Morozov; M. G. Munhoz; B. K. Nandi; C. Nattrass; T. K. Nayak; J. M. Nelson; P. K. Netrakanti; M. J. Ng; L. V. Nogach; S. B. Nurushev; G. Odyniec; A. Ogawa; H. Okada; V. Okorokov; D. Olson; M. Pachr; B. S. Page; S. K. Pal; Y. Pandit; Y. Panebratsev; T. Pawlak; T. Peitzmann; V. Perevoztchikov; C. Perkins; W. Peryt; S. C. Phatak; P. Pile; M. Planinic; M. A. Ploskon; J. Pluta; D. Plyku; N. Poljak; A. M. Poskanzer; Bvks Potukuchi; C. B. Powell; D. Prindle; C. Pruneau; N. K. Pruthi; P. R. Pujahari; J. Putschke; R. Raniwala; S. Raniwala; R. L. Ray; R. Redwine; R. Reed; J. M. Rehberg; H. G. Ritter; J. B. Roberts; O. V. Rogachevskiy; J. L. Romero; A. Rose; C. Roy; L. Ruan; M. J. Russcher; R. Sahoo; S. Sakai; I. Sakrejda; T. Sakuma; S. Salur; J. Sandweiss; E. Sangaline; J. Schambach; R. P. Scharenberg; N. Schmitz; T. R. Schuster; J. Seele; J. Seger; I. Selyuzhenkov; P. Seyboth; E. Shahaliev; M. Shao; M. Sharma; S. S. Shi; E. P. Sichtermann; F. Simon; R. N. Singaraju; M. J. Skoby; N. Smirnov; P. Sorensen; J. Sowinski; H. M. Spinka; B. Srivastava; T. D. S. Stanislaus; D. Staszak; J. R. Stevens; R. Stock; M. Strikhanov; B. Stringfellow; A. A. P. Suaide; M. C. Suarez; N. L. Subba; M. Sumbera; X. M. Sun; Y. Sun; Z. Sun; B. Surrow; T. J. M. Symons; A. S. de Toledo; J. Takahashi; A. H. Tang; Z. Tang; L. H. Tarini; T. Tarnowsky; D. Thein; J. H. Thomas; J. Tian; A. R. Timmins; S. Timoshenko; D. Tlusty; M. Tokarev; T. A. Trainor; V. N. Tram; S. Trentalange; R. E. Tribble; O. D. Tsai; J. Ulery; T. Ullrich; D. G. Underwood; G. Van Buren; G. van Nieuwenhuizen; J. A. Vanfossen; R. Varma; G. M. S. Vasconcelos; A. N. Vasiliev; F. Videbaek; Y. P. Viyogi; S. Vokal; S. A. Voloshin; M. Wada; M. Walker; F. Wang; G. Wang; H. Wang; J. S. Wang; Q. Wang; X. Wang; Y. Wang; G. Webb; J. C. Webb; G. D. Westfall; C. Whitten; H. Wieman; E. Wingfield; S. W. Wissink; R. Witt; Y. Wu; W. Xie; N. Xu; Q. H. Xu; W. Xu; Y. Xu; Z. Xu; L. Xue; Y. Yang; P. Yepes; K. Yip; I. K. Yoo; Q. Yue; M. Zawisza; H. Zbroszczyk; W. Zhan; S. Zhang; W. M. Zhang; X. P. Zhang; Y. Zhang; Z. P. Zhang; J. Zhao; C. Zhong; J. Zhou; W. Zhou; X. Zhu; Y. H. Zhu; R. Zoulkarneev; Y. Zoulkarneeva

2010-01-01

29

Experimental Evidence for a Light and Broad Scalar Resonance in D+ --> pi-pi+pi+ Decay  

Microsoft Academic Search

From a sample of 1172+\\/-61 D+-->pi-pi+pi+ decays, we find gamma\\\\(D+-->pi- pi+pi+\\\\)\\/gamma\\\\(D+-->K-pi+pi+\\\\) = 0.0311+\\/-0.0018+0.0016-0.0026. Using a coherent amplitude analysis to fit the Dalitz plot of these decays, we find strong evidence that a scalar resonance of mass 478+24-23+\\/-17 MeV\\/c2 and width 324+42-40+\\/-21 MeV\\/c2 accounts for approximately half of all decays.

E. M. Aitala; S. Amato; J. C. Anjos; J. A. Appel; D. Ashery; S. Banerjee; I. Bediaga; G. Blaylock; S. B. Bracker; P. R. Burchat; R. A. Burnstein; T. Carter; H. S. Carvalho; N. K. Copty; L. M. Cremaldi; C. Darling; K. Denisenko; S. Devmal; A. Fernandez; G. F. Fox; P. Gagnon; C. Gobel; K. Gounder; A. M. Halling; G. Herrera; G. Hurvits; C. James; P. A. Kasper; S. Kwan; D. C. Langs; J. Leslie; B. Lundberg; J. Magnin; A. Massafferri; S. Maytal-Beck; B. Meadows; J. R. de Mello Neto; D. Mihalcea; R. H. Milburn; J. M. de Miranda; A. Napier; A. Nguyen; A. B. D'Oliveira; K. O'Shaughnessy; K. C. Peng; L. P. Perera; M. V. Purohit; B. Quinn; S. Radeztsky; A. Rafatian; N. W. Reay; J. J. Reidy; A. C. Dos Reis; H. A. Rubin; D. A. Sanders; A. K. Santha; A. F. Santoro; A. J. Schwartz; M. Sheaff; R. A. Sidwell; A. J. Slaughter; M. D. Sokoloff; J. Solano; N. R. Stanton; R. J. Stefanski; K. Stenson; D. J. Summers; S. Takach; K. Thorne; A. K. Tripathi; S. Watanabe; R. Weiss-Babai; J. Wiener; N. Witchey; E. Wolin; S. M. Yang; D. Yi; S. Yoshida; R. Zaliznyak; C. Zhang

2001-01-01

30

Dispersion relations with crossing symmetry for {pi}{pi} D- and F-wave amplitudes  

SciTech Connect

A set of once subtracted dispersion relations with imposed crossing symmetry condition for the {pi}{pi} D- and F-wave amplitudes is derived and analyzed. An example of numerical calculations in the effective two-pion mass range from the threshold to 1.1 GeV is presented. It is shown that these new dispersion relations impose quite strong constraints on the analyzed {pi}{pi} interactions and are very useful tools to test the {pi}{pi} amplitudes. One of the goals of this work is to provide a complete set of equations required for easy use. Full analytical expressions are presented. Along with the well-known dispersion relations successful in testing the {pi}{pi} S- and P-wave amplitudes, those presented here for the D and F waves give a complete set of tools for analyses of the {pi}{pi} interactions.

Kaminski, R. [Department of Theoretical Physics Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, 31-342, Krakow (Poland)

2011-04-01

31

Measurements of the Branching fractions for $B_{(s)} \\\\to D_{(s)}\\\\pi\\\\pi\\\\pi$ and $\\\\Lambda_b^0 \\\\to \\\\Lambda_c^+\\\\pi\\\\pi\\\\pi$  

Microsoft Academic Search

Branching fractions of the decays $H_b\\\\to H_c\\\\pi^-\\\\pi^+\\\\pi^-$ relative to $H_b\\\\to H_c\\\\pi^-$ are presented, where $H_b$ ($H_c$) represents $\\\\overline{B^0}$ ($D^+$), $B^-$ ($D^0$), $\\\\overline{B_s^0}$ ($D_s^+$) and $\\\\Lambda_b^0$ ($\\\\Lambda_c^+$). The measurements are performed with the LHCb detector using 35~${\\\\rm pb^{-1}}$ of data collected at $\\\\sqrt{s}=7$~TeV. The ratios of branching fractions are measured to be \\\\begin{eqnarray*} {{\\\\cal{B}}(\\\\overline{B^0}\\\\to D^+\\\\pi^-\\\\pi^+\\\\pi^-)\\\\over{\\\\cal{B}}(\\\\overline{B^0}\\\\to D^+\\\\pi^-)} = 2.38\\\\pm0.11\\\\pm0.21 \\\

R Aaij; B Adeva; M Adinolfi; C Adrover; A Affolder; Z Ajaltouni; J Albrecht; F Alessio; M Alexander; G Alkhazov; P Alvarez Cartelle; A A Alves; S Amato; Y Amhis; J Anderson; R B Appleby; O Aquines Gutierrez; F Archilli; L Arrabito; A Artamonov; M Artuso; E Aslanides; G Auriemma; S Bachmann; J J Back; D S Bailey; V Balagura; W Baldini; R J Barlow; C Barschel; S Barsuk; W Barter; A Bates; C Bauer; Th Bauer; A Bay; I Bediaga; K Belous; I Belyaev; E Ben-Haim; M Benayoun; G Bencivenni; S Benson; J Benton; R Bernet; M-O Bettler; M van Beuzekom; A Bien; S Bifani; A Bizzeti; P M Bjørnstad; T Blake; F Blanc; C Blanks; J Blouw; S Blusk; A Bobrov; V Bocci; A Bondar; N Bondar; W Bonivento; S Borghi; A Borgia; T J V Bowcock; C Bozzi; T Brambach; J van den Brand; J Bressieux; D Brett; S Brisbane; M Britsch; T Britton; N H Brook; H Brown; A Büchler-Germann; I Burducea; A Bursche; J Buytaert; S Cadeddu; J M Caicedo Carvajal; O Callot; M Calvi; M Calvo Gomez; A Camboni; P Campana; A Carbone; G Carboni; R Cardinale; A Cardini; L Carson; K Carvalho Akiba; G Casse; M Cattaneo; M Charles; Ph Charpentier; N Chiapolini; K Ciba; X Cid Vidal; G Ciezarek; P E L Clarke; M Clemencic; H V Cliff; J Closier; C Coca; V Coco; J Cogan; P Collins; F Constantin; G Conti; A Contu; A Cook; M Coombes; G Corti; G A Cowan; R Currie; B D'Almagne; C D'Ambrosio; P David; I De Bonis; S De Capua; M De Cian; F De Lorenzi; J M De Miranda; L De Paula; P De Simone; D Decamp; M Deckenhoff; H Degaudenzi; M Deissenroth; L Del Buono; C Deplano; O Deschamps; F Dettori; J Dickens; H Dijkstra; P Diniz Batista; S Donleavy; A Dosil Suárez; D Dossett; A Dovbnya; F Dupertuis; R Dzhelyadin; C Eames; S Easo; U Egede; V Egorychev; S Eidelman; D van Eijk; F Eisele; S Eisenhardt; R Ekelhof; L Eklund; Ch Elsasser; D G d'Enterria; D Esperante Pereira; L Estéve; A Falabella; E Fanchini; C Färber; G Fardell; C Farinelli; S Farry; V Fave; V Fernandez Albor; M Ferro-Luzzi; S Filippov; C Fitzpatrick; M Fontana; F Fontanelli; R Forty; M Frank; C Frei; M Frosini; S Furcas; A Gallas Torreira; D Galli; M Gandelman; P Gandini; Y Gao; J-C Garnier; J Garofoli; J Garra Tico; L Garrido; C Gaspar; N Gauvin; M Gersabeck; T Gershon; Ph Ghez; V Gibson; V V Gligorov; C Göbel; D Golubkov; A Golutvin; A Gomes; H Gordon; M Grabalosa Gándara; R Graciani Diaz; L A Granado Cardoso; E Graugés; G Graziani; A Grecu; S Gregson; B Gui; E Gushchin; Yu Guz; T Gys; G Haefeli; C Haen; S C Haines; T Hampson; S Hansmann-Menzemer; R Harji; N Harnew; J Harrison; P F Harrison; J He; V Heijne; K Hennessy; P Henrard; J A Hernando Morata; E van Herwijnen; E Hicks; W Hofmann; K Holubyev; P Hopchev; W Hulsbergen; P Hunt; T Huse; R S Huston; D Hutchcroft; D Hynds; V Iakovenko; P Ilten; J Imong; R Jacobsson; A Jaeger; M Jahjah Hussein; E Jans; F Jansen; P Jaton; B Jean-Marie; F Jing; M John; D Johnson; C R Jones; B Jost; S Kandybei; M Karacson; T M Karbach; J Keaveney; U Kerzel; T Ketel; A Keune; B Khanji; Y M Kim; M Knecht; S Koblitz; P Koppenburg; A Kozlinskiy; L Kravchuk; K Kreplin; M Kreps; G Krocker; P Krokovny; F Kruse; K Kruzelecki; M Kucharczyk; S Kukulak; R Kumar; T Kvaratskheliya; V N La Thi; D Lacarrere; G Lafferty; A Lai; D Lambert; R W Lambert; E Lanciotti; G Lanfranchi; C Langenbruch; T Latham; R Le Gac; J van Leerdam; J-P Lees; R Lefévre; A Leflat; J Lefrançois; O Leroy; T Lesiak; L Li; L Li Gioi; M Lieng; M Liles; R Lindner; C Linn; B Liu; G Liu; J H Lopes; E Lopez Asamar; N Lopez-March; J Luisier; F Machefert; I V Machikhiliyan; F Maciuc; O Maev; J Magnin; S Malde; R M D Mamunur; G Manca; G Mancinelli; N Mangiafave; U Marconi; R Märki; J Marks; G Martellotti; A Martens; L Martin; A Martín Sánchez; D Martinez Santos; A Massafferri; Z Mathe; C Matteuzzi; M Matveev; E Maurice; B Maynard; A Mazurov; G McGregor; R McNulty; C Mclean; M Meissner; M Merk; J Merkel; R Messi; S Miglioranzi; D A Milanes; M-N Minard; S Monteil; D Moran; P Morawski; I Mous; F Muheim; K Müller; R Muresan; B Muryn; M Musy; J Mylroie-Smith; P Naik; T Nakada; R Nandakumar; J Nardulli; I Nasteva; M Nedos; M Needham; N Neufeld; C Nguyen-Mau; M Nicol; S Nies; V Niess; N Nikitin; A Oblakowska-Mucha; V Obraztsov; S Oggero; S Ogilvy; O Okhrimenko; R Oldeman; M Orlandea; J M Otalora Goicochea; P Owen; B Pal; J Palacios; M Palutan; J Panman; A Papanestis; M Pappagallo; C Parkes; C J Parkinson; G Passaleva; G D Patel; M Patel; S K Paterson; G N Patrick; C Patrignani; C Pavel-Nicorescu; A Pazos Alvarez; A Pellegrino; G Penso; M Pepe Altarelli; S Perazzini; D L Perego; E Perez Trigo; A Pérez-Calero Yzquierdo; P Perret; M Perrin-Terrin; G Pessina; A Petrella; A Petrolini; B Pie Valls; B Pietrzyk; T Pilar; D Pinci; R Plackett; S Playfer; M Plo Casasus; G Polok; A Poluektov; E Polycarpo; D Popov; B Popovici; C Potterat; A Powell; T du Pree; J Prisciandaro; V Pugatch; A Puig Navarro; W Qian; J H Rademacker; B Rakotomiaramanana; M S Rangel; I Raniuk; G Raven; S Redford

2011-01-01

32

First observation of decay $B_c^+\\\\to J\\/\\\\psi \\\\pi^+\\\\pi^-\\\\pi^+$  

Microsoft Academic Search

The decay $B_c^+\\\\to J\\/\\\\psi \\\\pi^+\\\\pi^-\\\\pi^+$ is observed for the first time, using 0.8 fb$^{-1}$ of $pp$ collisions at $\\\\sqrt{s}=7$ TeV collected by the LHCb experiment. The ratio of branching fractions ${\\\\cal B}(B_c^+\\\\to J\\/\\\\psi \\\\pi^+\\\\pi^-\\\\pi^+)\\/{\\\\cal B}(B_c^+\\\\to J\\/\\\\psi \\\\pi^+)$ is measured to be $2.41\\\\pm0.30\\\\pm0.33$, where the first uncertainty is statistical and the second systematic. The result is in agreement with theoretical predictions.

R Aaij; C Abellan Beteta; B Adeva; M Adinolfi; C Adrover; A Affolder; Z Ajaltouni; J Albrecht; F Alessio; M Alexander; S Ali; G Alkhazov; P Alvarez Cartelle; A A Alves Jr; S Amato; Y Amhis; J Anderson; R B Appleby; O Aquines Gutierrez; F Archilli; A Artamonov; M Artuso; E Aslanides; G Auriemma; S Bachmann; J J Back; V Balagura; W Baldini; R J Barlow; C Barschel; S Barsuk; W Barter; A Bates; C Bauer; Th Bauer; A Bay; I Bediaga; S Belogurov; K Belous; I Belyaev; E Ben-Haim; M Benayoun; G Bencivenni; S Benson; J Benton; R Bernet; M-O Bettler; M van Beuzekom; A Bien; S Bifani; T Bird; A Bizzeti; P M Bjørnstad; T Blake; F Blanc; C Blanks; J Blouw; S Blusk; A Bobrov; V Bocci; A Bondar; N Bondar; W Bonivento; S Borghi; A Borgia; T J V Bowcock; C Bozzi; T Brambach; J van den Brand; J Bressieux; D Brett; M Britsch; T Britton; N H Brook; H Brown; A Büchler-Germann; I Burducea; A Bursche; J Buytaert; S Cadeddu; O Callot; M Calvi; M Calvo Gomez; A Camboni; P Campana; A Carbone; G Carboni; R Cardinale; A Cardini; L Carson; K Carvalho Akiba; G Casse; M Cattaneo; Ch Cauet; M Charles; Ph Charpentier; N Chiapolini; K Ciba; X Cid Vidal; G Ciezarek; P E L Clarke; M Clemencic; H V Cliff; J Closier; C Coca; V Coco; J Cogan; P Collins; A Comerma-Montells; A Contu; A Cook; M Coombes; G Corti; B Couturier; G A Cowan; R Currie; C D'Ambrosio; P David; I De Bonis; K De Bruyn; S De Capua; M De Cian; J M De Miranda; L De Paula; P De Simone; D Decamp; M Deckenhoff; H Degaudenzi; L Del Buono; C Deplano; D Derkach; O Deschamps; F Dettori; J Dickens; H Dijkstra; P Diniz Batista; F Domingo Bonal; S Donleavy; F Dordei; A Dosil Suárez; D Dossett; A Dovbnya; F Dupertuis; R Dzhelyadin; A Dziurda; S Easo; U Egede; V Egorychev; S Eidelman; D van Eijk; F Eisele; S Eisenhardt; R Ekelhof; L Eklund; Ch Elsasser; D Elsby; D Esperante Pereira; A Falabella; C Färber; G Fardell; C Farinelli; S Farry; V Fave; V Fernandez Albor; M Ferro-Luzzi; S Filippov; C Fitzpatrick; M Fontana; F Fontanelli; R Forty; O Francisco; M Frank; C Frei; M Frosini; S Furcas; A Gallas Torreira; D Galli; M Gandelman; P Gandini; Y Gao; J-C Garnier; J Garofoli; J Garra Tico; L Garrido; D Gascon; C Gaspar; R Gauld; N Gauvin; M Gersabeck; T Gershon; Ph Ghez; V Gibson; V V Gligorov; C Göbel; D Golubkov; A Golutvin; A Gomes; H Gordon; M Grabalosa Gándara; R Graciani Diaz; L A Granado Cardoso; E Graugés; G Graziani; A Grecu; E Greening; S Gregson; B Gui; E Gushchin; Yu Guz; T Gys; C Hadjivasiliou; G Haefeli; C Haen; S C Haines; T Hampson; S Hansmann-Menzemer; R Harji; N Harnew; J Harrison; P F Harrison; T Hartmann; J He; V Heijne; K Hennessy; P Henrard; J A Hernando Morata; E van Herwijnen; E Hicks; K Holubyev; P Hopchev; W Hulsbergen; P Hunt; T Huse; R S Huston; D Hutchcroft; D Hynds; V Iakovenko; P Ilten; J Imong; R Jacobsson; A Jaeger; M Jahjah Hussein; E Jans; F Jansen; P Jaton; B Jean-Marie; F Jing; M John; D Johnson; C R Jones; B Jost; M Kaballo; S Kandybei; M Karacson; T M Karbach; J Keaveney; I R Kenyon; U Kerzel; T Ketel; A Keune; B Khanji; Y M Kim; M Knecht; R F Koopman; P Koppenburg; M Korolev; A Kozlinskiy; L Kravchuk; K Kreplin; M Kreps; G Krocker; P Krokovny; F Kruse; K Kruzelecki; M Kucharczyk; V Kudryavtsev; T Kvaratskheliya; V N La Thi; D Lacarrere; G Lafferty; A Lai; D Lambert; R W Lambert; E Lanciotti; G Lanfranchi; C Langenbruch; T Latham; C Lazzeroni; R Le Gac; J van Leerdam; J-P Lees; R Lefèvre; A Leflat; J Lefrançois; O Leroy; T Lesiak; L Li; L Li Gioi; M Lieng; M Liles; R Lindner; C Linn; B Liu; G Liu; J von Loeben; J H Lopes; E Lopez Asamar; N Lopez-March; H Lu; J Luisier; F Machefert; I V Machikhiliyan; F Maciuc; O Maev; J Magnin; S Malde; R M D Mamunur; G Manca; G Mancinelli; N Mangiafave; U Marconi; R Märki; J Marks; G Martellotti; A Martens; L Martin; A Martín Sánchez; M Martinelli; D Martinez Santos; A Massafferri; Z Mathe; C Matteuzzi; M Matveev; E Maurice; B Maynard; A Mazurov; G McGregor; R McNulty; M Meissner; M Merk; J Merkel; S Miglioranzi; D A Milanes; M-N Minard; J Molina Rodriguez; S Monteil; D Moran; P Morawski; I Mous; F Muheim; K Müller; R Muresan; B Muryn; B Muster; J Mylroie-Smith; P Naik; T Nakada; R Nandakumar; I Nasteva; M Needham; N Neufeld; A D Nguyen; C Nguyen-Mau; M Nicol; V Niess; N Nikitin; T Nikodem; A Nomerotski; A Novoselov; A Oblakowska-Mucha; V Obraztsov; S Oggero; S Ogilvy; O Okhrimenko; R Oldeman; M Orlandea; J M Otalora Goicochea; P Owen; B K Pal; J Palacios; A Palano; M Palutan; J Panman; A Papanestis; M Pappagallo; C Parkes; C J Parkinson; G Passaleva; G D Patel; M Patel; S K Paterson; G N Patrick; C Patrignani; C Pavel-Nicorescu; A Pazos Alvarez; A Pellegrino; G Penso; M Pepe Altarelli; S Perazzini; D L Perego; E Perez Trigo; A Pérez-Calero Yzquierdo; P Perret; M Perrin-Terrin; G Pessina; A Petrolini; A Phan; E Picatoste Olloqui; B Pie Valls; B Pietrzyk; T Pila?; D Pinci; R Plackett; S Playfer; M Plo Casasus; G Polok; A Poluektov

2012-01-01

33

Experimental studies of the $\\\\pi^+\\\\pi^-\\\\pi^+\\\\pi^-\\\\pi^0$, $K^+K^-\\\\pi^+\\\\pi^-\\\\pi^0$ and $p\\\\bar p\\\\pi^+\\\\pi^-\\\\pi^0$ final states produced in $e^+e^-$ annihilation at $\\\\sqrt{s}=$ 3.773 and 3.650 GeV  

Microsoft Academic Search

We report measurements of the observed cross sections for $e^+e^-\\\\to\\\\omega\\u000a\\\\pi^+\\\\pi^-$, $\\\\omega K^+K^-$, $\\\\omega p\\\\bar p$, $K^+K^-\\\\rho^0\\\\pi^0$,\\u000a$K^+K^-\\\\rho^+\\\\pi^-+c.c.$, $K^{*0}K^-\\\\pi^+\\\\pi^0+c.c.$,\\u000a$K^{*+}K^-\\\\pi^+\\\\pi^-+c.c.$, $\\\\phi\\\\pi^+\\\\pi^-\\\\pi^0$ and $\\\\Lambda \\\\bar \\\\Lambda\\u000a\\\\pi^0$ at $\\\\sqrt s=$ 3.773 and 3.650 GeV. Upper limits (90% C.L.) are given for\\u000aobserved cross sections and for $\\\\psi(3770)$ decay branching fractions for\\u000aproduction of these final states. These measurements are made by

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

2007-01-01

34

The reaction gammap --> ppi+pi-pi+pi- for photon energies from 25 to 70 GeV  

Microsoft Academic Search

Measurements of the reaction gammap --> ppi+pi-pi+pi- are presented, in which pi+pi-pi+pi- systems with masses up to 3 GeV are produced from fragmentation of the incident photon. The reaction is dominated by production of the large peak of the varrho'(1600) meson and, at higher masses >~2 GeV, y production of jet-like 4pi systems. The varrho'(1600) meson is produced by a

D. Aston; M. Atkinson; R. Bailey; A. H. Ball; B. Bouquet; G. R. Brookes; J. Bröring; Peter J Bussey; D. Clarke; A. B. Clegg; B. D'Almagne; G. de Rosny; B. Diekmann; Alexander Donnachie; M. Draper; B. Drevillon; I. P. Duerdoth; J.-P. Dufey; R. J. Ellison; D. Ezra; P. Feller; A. Ferrer; P. J. Flynn; F. Friese; William Galbraith; R. George; S. D. M. Gill; M. Goldberg; S. Goodman; W. Graves; B. Grossetête; P. G. Hampson; K. Heinloth; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; M. Jung; S. Katsanevas; M. A. R. Kemp; F. Kovacs; B. R. Kumar; G. D. Lafferty; J. M. Lévy; V. Liebenau; John Litt; G W London; D. Mercer; J. V. Morris; K. Müller; D. Newton; E. Paul; P. Petroff; Y. Pons; C. Raine; F. Richard; R H Richter; J. H. C. Roberts; Patrick Roudeau; A. Rougé; M. Rumpf; M. Sené; Ian O Skillicorn; J. C. Sleeman; K. M. Smith; C. Steinhauer; Kenneth Mick Storr; R. J. Thompson; D. Treille; Ch. de La Vaissière; H L Videau; I. Videau; A. P. Waite; A. Wijangco; W. Wojcik; J.-P. Wuthrick; T. P. Yiou

1981-01-01

35

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

Microsoft Academic Search

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

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

36

Measurement of CP violation parameters with a Dalitz plot analysis of B{+/-}-->D{pi{+}pi{-}pi{0}}K{+/-}.  

PubMed

We report the results of a CP violation analysis of the decay B{+/-}-->D{pi{+}pi{-}pi;{0}}K{+/-}, where D{pi{+}pi{-}pi{0}} indicates a neutral D meson detected in the final state pi{+}pi{-}pi{0}, excluding K{S}{0}pi{0}. The analysis makes use of 324 x 10{6}e{+}e{-}-->BB[over ] events recorded by the BABAR experiment at the PEP-II e;{+}e;{-} storage ring. Analyzing the pi;{+}pi;{-}pi;{0} Dalitz plot distribution and the B{+/-}-->D{pi{+}pi{-}pi{0}}K{+/-} branching fraction and decay rate asymmetry, we find the following one-standard-deviation constraints on the amplitude ratio and on the weak and strong phases: 0.06pi{+}pi{-}pi{0} decay amplitude. PMID:18233513

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

2007-12-17

37

Total cross section of the process e+e--->pi+pi-pi+pi- in the c.m. energy range 980-1380 MeV  

Microsoft Academic Search

The e+e--->pi+pi-pi+pi- cross section has been measured using 5.8 pb-1 of integrated luminosity collected with the CMD-2 detector at the VEPP-2M collider. Analysis of the data with a refined efficiency determination and use of both three- and four-track events allowed doubling of a data sample and reduction of systematic errors to 5-7%.

R. R. Akhmetshin; V. M. Aulchenko; V. Sh. Banzarov; A. Baratt; L. M. Barkov; N. S. Bashtovoy; A. E. Bondar; D. V. Bondarev; A. V. Bragin; S. I. Eidelman; D. A. Epifanov; G. V. Fedotovitch; N. I. Gabyshev; D. A. Gorbachev; A. A. Grebeniuk; D. N. Grigoriev; F. V. Ignatov; S. V. Karpov; V. F. Kazanin; B. I. Khazin; I. A. Koop; P. P. Krokovny; A. S. Kuzmin; I. B. Logashenko; P. A. Lukin; A. P. Lysenko; K. Yu. Mikhailov; A. I. Milstein; I. N. Nesterenko; V. S. Okhapkin; A. V. Otboev; E. A. Perevedentsev; A. A. Polunin; A. S. Popov; S. I. Redin; N. I. Root; A. A. Ruban; N. M. Ryskulov; A. G. Shamov; Yu. M. Shatunov; B. A. Shwartz; A. L. Sibidanov; V. A. Sidorov; A. N. Skrinsky; I. G. Snopkov; E. P. Solodov; J. A. Thompson; A. A. Valishev; Yu. V. Yudin; A. S. Zaitsev; S. G. Zverev

2004-01-01

38

Charmless decays B{yields}{pi}{pi},{pi}K and KK in broken SU(3) symmetry  

SciTech Connect

Charmless B decay modes B{yields}{pi}{pi},{pi}K and KK are systematically investigated with and without flavor SU(3) symmetry. Independent analyses on {pi}{pi} and {pi}K modes both favor a large ratio between color-suppressed tree (C) and tree (T) diagram, which suggests that they are more likely to originate from long distance effects. The sizes of QCD penguin diagrams extracted individually from {pi}{pi}, {pi}K and KK modes are found to follow a pattern of SU(3) breaking in agreement with the naive factorization estimates. Global fits to these modes are done under various scenarios of SU(3) relations. The results show good determinations of weak phase {gamma} in consistency with the standard model (SM), but a large electroweak penguin (P{sub EW}) relative to T+C with a large relative strong phase is favored, which requires a big enhancement of color-suppressed electroweak penguin (P{sub EW}{sup C}) compatible in size but destructively interfering with P{sub EW} within the SM, or implies new physics. The possibilities of sizable contributions from nonfactorizable diagrams such as W exchange (E), annihilation (A), and penguin-annihilation diagrams (P{sub A}) are investigated. The implications to the branching ratios and CP violations in KK modes are discussed.

Wu Yueliang; Zhou Yufeng [Institute of Theoretical Physics, CAS, Beijing, 100080 (China); Institute for Physics, Dortmund University, D-44221, Dortmund (Germany)

2005-08-01

39

Measurement and analysis of the reaction gammagamma--> pi + pi - pi + pi -  

Microsoft Academic Search

We have measured the cross section of four charged pion production in photon-photon interactions in the invariant mass range 1.0≦ W gammagamma≦3.2 GeV and up to Q 2=16 GeV2. For 1.2 GeV≦ W gammagamma≦1.7 GeV the process is dominated by rho0rho0 production with a rapid rise in cross section around 1.2 GeV, well below the nominal rho0rho0 threshold. The observed

Ch. Berger; H. Genzel; W. Lackas; J. Pielorz; F. Raupach; W. Wagner; A. Klovning; E. Lillestöl; J. Bürger; L. Criegee; A. Deuter; F. Ferrarotto; G. Franke; M. Gaspero; Ch. Gerke; G. Knies; B. Lewendel; J. Meyer; U. Michelsen; K. H. Pape; B. Stella; U. Timm; G. G. Winter; M. Zachara; W. Zimmermann; P. J. Bussey; S. L. Cartwright; J. B. Daniton; D. Hendry; B. T. King; C. Raine; J. M. Scarr; I. O. Skillicorn; K. M. Smith; J. C. Thomson; O. Achterberg; V. Blobel; D. Burkart; K. Diehlmann; M. Feindt; H. Kapitza; B. Koppitz; M. Krüger; M. Poppe; H. Spitzer; R. van Staa; C. Y. Chang; R. G. Glasser; R. G. Kellogg; S. J. Maxfield; R. O. Polvado; B. Sechi-Zorn; J. A. Skard; A. Skuja; A. J. Tylka; G. E. Welch; G. T. Zorn; F. Almeida; A. Bäcker; F. Barreiro; S. Brandt; K. Derikum; C. Grupen; H. J. Meyer; H. Müller; B. Neumann; M. Rost; K. Stupperich; G. Zech; G. Alexander; G. Bella; Y. Gnat; J. Grunhaus; H. Junge; K. Kraski; C. Maxeiner; H. Maxeiner; D. Schmidt

1988-01-01

40

Geometry optimization of excited valence states of formaldehyde using analytical multireference configuration interaction singles and doubles and multireference averaged quadratic coupled-cluster gradients, and MR-AQCC gradients and the conical intersection formed by the 1{sup 1}B{sub 1}({sigma}-{pi}*) and 2{sup 1}A{sub 1}({pi}-{pi}*) states.  

SciTech Connect

Extended MR-CISD (multireference configuration interaction singles and doubles), MR-CISD + Q (multireference configuration interaction singles, doubles, and quadrupole), and MR-AQCC (multireference averaged quadratic coupled clusters) calculations have been performed on the following valence states of formaldehyde: 1 {sup 1}A{sub 1} (planar ground state), 1 {sup 1}A{sub 2} and 1 {sup 1}A{prime} (planar and nonplanar n-{pi}* state), 1 {sup 1}B{sub 1} and 2 {sup 1}A{sub 1} (planar {sigma}-{pi}* and {pi}-{pi}* states) and their nonplanar counterparts 2 {sup 1}A{prime} and 3 {sup 1}A{prime}. Full geometry optimizations have been performed using analytic gradient techniques developed for the MR-CISD and MR-AQCC methods as implemented into the COLUMBUS program system. Basis set extrapolation techniques have been used for the determination of high-accuracy geometries and adiabatic excitation energies. Harmonic vibrational frequencies have been computed also. Agreement between calculated and available experimental data is very good. Especially for the {sigma}-{pi}* and {pi}-{pi}* states experimental information is extremely scarce and our results provide reliable predictions. The major new result of our work is the finding that for the 2 {sup 1}A{sub 1}({pi}-{pi}*) state the structure optimized under planarity constraints is only a saddle point and not a minimum. This fact is the result of a conical intersection between the {sigma}-{pi}* and {pi}-{pi}* states (1 {sup 1}B{sub 1} and 2 {sup 1}A{sub 1}). The final result is that neither on the 2 {sup 1}A{prime} nor on the 3 {sup 1}A{prime} surface a stationary minimum can be assigned to the {pi}-{pi}* state.

Dallos, M.; Muller, T.; Lischka, H.; Shepard, R.; Chemistry; Univ. of Vienna

2001-01-08

41

3-Oxa-6,8-diaza-1,2:4,5-dibenzocycloocta-1,4-dien-7-one: a three-dimensional network assembled by hydrogen-bonding, pi-pi and edge-to-face interactions.  

PubMed

The title compound, C(13)H(10)N(2)O(2), is the first structure in which the urea moiety is incorporated into an eight-membered ring. Two molecules are found in the asymmetric unit, which are almost identical in their conformation and their hydrogen-bond pattern. The carbonyl O atom acts as a double acceptor for the NH groups of two adjacent molecules. In this way, infinite tapes are formed, which are connected via pi-pi and edge-to-face interactions in the second and third dimension. This hierarchical order of interactions is confirmed by molecular mechanics calculations. Force-field and semi-empirical calculations for a single molecule did not find the envelope conformation present in the crystal, indicating instead a C(s) conformation. Only with a model consisting of a hydrogen-bonded dimer or a larger hydrogen-bonded section was a conformation found that was similar to the one present in the crystal. PMID:14767138

Böhmer, Volker; Meshcheryakov, Denys; Thondorf, Iris; Bolte, Michael

2004-01-17

42

2-Iodo-6-methoxy-4-nitroaniline: tripartite ribbons built from N-H...O hydrogen bonds and iodo-nitro interactions are pi-stacked into sheets.  

PubMed

Molecules of the title compound, C7H7IN2O3, are linked by pairs of N-H...O hydrogen bonds into C(8)C(8)[R(2)(2)(6)] chains of rings, and antiparallel pairs of such chains are linked by a two-centre iodo-nitro interaction into tripartite ribbons. A single aromatic pi-pi stacking interaction links the ribbons into sheets. PMID:15750239

Garden, Simon J; Glidewell, Christopher; Low, John N; Skakle, Janet M S; Wardell, James L

2005-02-12

43

Search for the photoexcitation of exotic mesons in the pi+pi+pi- system.  

PubMed

A search for exotic mesons in the pi;{+}pi;{+}pi;{-} system photoproduced by the charge exchange reaction gammap-->pi;{+}pi;{+}pi;{-}(n) was carried out by the CLAS Collaboration at Jefferson Lab. A tagged-photon beam with energies in the 4.8 to 5.4 GeV range, produced through bremsstrahlung from a 5.744 GeV electron beam, was incident on a liquid-hydrogen target. A partial wave analysis was performed on a sample of 83 000 events, the highest such statistics to date in this reaction at these energies. The main objective of this study was to look for the photoproduction of an exotic J;{PC}=1;{-+} resonant state in the 1 to 2 GeV mass range. Our partial wave analysis shows production of the a_{2}(1320) and the pi_{2}(1670) mesons, but no evidence for the a_{1}(1260), nor the pi_{1}(1600) exotic state at the expected levels. An upper limit of 13.5 nb is determined for the exotic pi_{1}(1600) cross section, less than 2% of the a_{2}(1320) production. PMID:19392105

Nozar, M; Salgado, C; Weygand, D P; Guo, L; Adams, G; Li, Ji; Eugenio, P; Amaryan, M J; Anghinolfi, M; Asryan, G; Avakian, H; Bagdasaryan, H; Baillie, N; Ball, J P; Baltzell, N A; Barrow, S; Battaglieri, M; Bedlinskiy, I; Bektasoglu, M; Bellis, M; Benmouna, N; Berman, B L; Biselli, A S; Blaszczyk, L; Bonner, B E; Bouchigny, S; Boiarinov, S; Bradford, R; Branford, D; Briscoe, W J; Brooks, W K; Bültmann, S; Burkert, V D; Butuceanu, C; Calarco, J R; Careccia, S L; Carman, D S; Carnahan, B; Casey, L; Cazes, A; Chen, S; Cheng, L; Cole, P L; Collins, P; Coltharp, P; Cords, D; Corvisiero, P; Crabb, D; Crannell, H; Crede, V; Cummings, J P; Dale, D; Dashyan, N; De Masi, R; De Vita, R; De Sanctis, E; Degtyarenko, P V; Denizli, H; Dennis, L; Deur, A; Dharmawardane, K V; Dhuga, K S; Dickson, R; Djalali, C; Dodge, G E; Doughty, D; Dugger, M; Dytman, S; Dzyubak, O P; Egiyan, H; Egiyan, K S; El Fassi, L; Elouadrhiri, L; Fatemi, R; Fedotov, G; Feuerbach, R J; Forest, T A; Fradi, A; Funsten, H; Garçon, M; Gavalian, G; Gevorgyan, N; Gilfoyle, G P; Giovanetti, K L; Girod, F X; Goetz, J T; Gothe, R W; Griffioen, K A; Guidal, M; Guillo, M; Guler, N; Gyurjyan, V; Hadjidakis, C; Hafidi, K; Hakobyan, H; Hanretty, C; Hardie, J; Hassall, N; Heddle, D; Hersman, F W; Hicks, K; Hleiqawi, I; Holtrop, M; Hyde-Wright, C E; Ilieva, Y; Ireland, D G; Ishkhanov, B S; Isupov, E L; Ito, M M; Jenkins, D; Jo, H S; Johnstone, J R; Joo, K; Juengst, H G; Kalantarians, N; Kellie, J D; Khandaker, M; Kim, W; Klein, A; Klein, F J; Kossov, M; Krahn, Z; Kramer, L H; Kubarovsky, V; Kuhn, J; Kuhn, S E; Kuleshov, S V; Kuznetsov, V; Lachniet, J; Laget, J M; Langheinrich, J; Lawrence, D; Livingston, K; Lu, H Y; Maccormick, M; Markov, N; Mattione, P; McAleer, S; McKinnon, B; McNabb, J W C; Mecking, B A; Mehrabyan, S; Mestayer, M D; Meyer, C A; Mibe, T; Mikhailov, K; Mirazita, M; Miskimen, R; Mokeev, V; Moreno, B; Moriya, K; Morrow, S A; Moteabbed, M; Mueller, J; Munevar, E; Mutchler, G S; Nadel-Turonski, P; Nasseripour, R; Niccolai, S; Niculescu, G; Niculescu, I; Niczyporuk, B B; Niroula, M R; Niyazov, R A; O'Rielly, G V; Osipenko, M; Ostrovidov, A I; Park, K; Pasyuk, E; Paterson, C; Anefalos Pereira, S; Philips, S A; Pierce, J; Pivnyuk, N; Pocanic, D; Pogorelko, O; Polli, E; Popa, I; Pozdniakov, S; Preedom, B M; Price, J W; Prok, Y; Protopopescu, D; Qin, L M; Raue, B A; Riccardi, G; Ricco, G; Ripani, M; Ritchie, B G; Ronchetti, F; Rosner, G; Rossi, P; Rubin, P D; Sabatié, F; Salamanca, J; Santoro, J P; Sapunenko, V; Schumacher, R A; Serov, V S; Sharabian, Y G; Sharov, D; Shvedunov, N V; Skabelin, A V; Smith, E S; Smith, L C; Sober, D I; Sokhan, D; Stavinsky, A; Stepanyan, S S; Stepanyan, S; Stokes, B E; Stoler, P; Strakovsky, I I; Strauch, S; Taiuti, M; Tedeschi, D J; Thoma, U; Tkabladze, A; Tkachenko, S; Todor, L; Ungaro, M; Vineyard, M F; Vlassov, A V; Watts, D P; Weinstein, L B; Williams, M; Wolin, E; Wood, M H; Yegneswaran, A; Zana, L; Zhang, J; Zhao, B; Zhao, Z W

2009-03-12

44

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

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.

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

45

Chiral symmetry and N*(1440){yields}N{pi}{pi} decay  

SciTech Connect

The N*(1440){yields}N{pi}{pi} decay is studied by making use of the chiral reduction formula. This formula suggests a scalar-isoscalar pion-baryon contact interaction that is absent in the recent study of Hernandez et al. [Phys. Rev. C 66, 065201 (2002)]. The contact interaction is introduced into their model and is found to be necessary for the simultaneous description of g{sub RN{pi}}{sub {pi}} and the {pi}{pi} and {pi}N invariant mass distributions.

Kamano, H.; Morishita, M.; Arima, M. [Department of Physics, Osaka City University, Osaka 558-8585 (Japan)

2005-04-01

46

Assessment of standard force field models against high-quality ab initio potential curves for prototypes of pi-pi, CH\\/pi, and SH\\/pi interactions  

Microsoft Academic Search

Several popular force fields, namely, CHARMM, AMBER, OPLS-AA, and MM3, have been tested for their ability to reproduce highly accurate quantum mechanical potential energy curves for noncovalent interactions in the ben- zene dimer, the benzene-CH4 complex, and the benzene-H2S complex. All of the force fields are semi-quantitatively correct, but none of them is consistently reliable quantitatively. Re-optimization of Lennard-Jones parameters

C. David Sherrill; Bobby G. Sumpter; Mutasem O. Sinnokrot; Michael S. Marshall; Edward G. Hohenstein; Ross C. Walker; Ian R. Gould

2009-01-01

47

Assessment of standard force field models against high-quality ab initio potential curves for prototypes of pi-pi, CH/pi, and SH/pi interactions.  

PubMed

Several popular force fields, namely, CHARMM, AMBER, OPLS-AA, and MM3, have been tested for their ability to reproduce highly accurate quantum mechanical potential energy curves for noncovalent interactions in the benzene dimer, the benzene-CH(4) complex, and the benzene-H(2)S complex. All of the force fields are semi-quantitatively correct, but none of them is consistently reliable quantitatively. Re-optimization of Lennard-Jones parameters and symmetry-adapted perturbation theory analysis for the benzene dimer suggests that better agreement cannot be expected unless more flexible functional forms (particularly for the electrostatic contributions) are employed for the empirical force fields. PMID:19242959

Sherrill, C David; Sumpter, Bobby G; Sinnokrot, Mutasem O; Marshall, Michael S; Hohenstein, Edward G; Walker, Ross C; Gould, Ian R

2009-11-15

48

Dalitz plot structure in D{sup 0{yields}{pi}+{pi}-{pi}0}  

SciTech Connect

The BABAR Collaboration has pointed out that D{sup 0{yields}{pi}+{pi}-{pi}0} is dominated by an isospin-zero final state, leading to nearly complete depletion of the Dalitz plot along all three diagonals. In flavor-SU(3) approaches to charmed particle decays to a light vector and a light pseudoscalar particle, this behavior is seen, but does not appear to have a fundamental origin. Instead, it arises as a result of approximate cancellation of higher-isospin combinations of several types of amplitudes: color-favored tree, color-suppressed tree, and exchange. Interpretation in terms of a direct-channel effect would require an exotic resonance, with spin, parity, and charge-conjugation eigenvalues J{sup PC}=0{sup --}.

Bhattacharya, Bhubanjyoti; Rosner, Jonathan L. [Enrico Fermi Institute and Department of Physics, University of Chicago, 5640 S. Ellis Avenue, Chicago, Illinois 60637 (United States); Chiang, Cheng-Wei [Department of Physics and Center for Mathematics and Theoretical Physics, National Central University, Chungli, Taiwan 320 (China); Institute of Physics, Academia Sinica Taipei, Taiwan 115 (China)

2010-05-01

49

Photoproduction of {pi}{pi} Pairs off {sup 7}Li  

SciTech Connect

This paper reports on the quasi-free photoproduction of {pi}{sup 0}{pi}{sup 0} and {pi}{sup 0}{pi}{sup +/-} pairs from {sup 7}Li in view of the in-medium properties of hadrons. Measurements have been done using the CB/TAPS detector setup and the Glasgow photon tagging spectrometer for incident photon energies up to 820 MeV. At small invariant masses, an enhancement of the neutral invariant mass distributions is seen compared to the mixed charged channel and could be explained either by an in-medium modification of the {pi}{pi} interaction in the I = J = 0 channel or by effects related to the final state interactions.

Maghrbi, Yasser [Department of Physics, University of Basel, CH-4056 Basel (Switzerland)

2011-10-21

50

Measurement of the ratios of branching fractions B(B0s --> Ds- pi+ pi+ pi-)/B(B0-->D- pi+ pi+ pi-) and B(B0s --> Ds- pi+)/B(B0-->D- pi+).  

PubMed

Using 355 pb;{-1} of data collected by the CDF II detector in pp[over ] collisions at sqrt[s]=1.96 TeV at the Fermilab Tevatron, we study the fully reconstructed hadronic decays B_{(s)};{0}-->D_{(s)};{-}pi;{+} and B_{(s)};{0}-->D_{(s)};{-}pi;{+}pi;{+}pi;{-}. We present the first measurement of the ratio of branching fractions B(B_{s};{0}-->D_{s};{-}pi;{+}pi;{+}pi;{-})/B(B;{0}-->D;{-}pi;{+}pi;{+}pi;{-})=1.05+/-0.10(stat)+/-0.22(syst). We also update our measurement of B(B_{s};{0}-->D_{s};{-}pi;{+})/B(B;{0}-->D;{-}pi;{+}) to 1.13+/-0.08(stat)+/-0.23(syst), improving the statistical uncertainty by more than a factor of 2. We find B(B_{s};{0}-->D_{s};{-}pi;{+})=[3.8+/-0.3(stat)+/-1.3(syst)]x10;{-3} and B(B_{s};{0}-->D_{s};{-}pi;{+}pi;{+}pi;{-})=[8.4+/-0.8(stat)+/-3.2(syst)]x10;{-3}. PMID:17358931

Abulencia, A; Adelman, J; Affolder, T; Akimoto, T; Albrow, M G; Ambrose, D; Amerio, S; Amidei, D; Anastassov, A; Anikeev, K; Annovi, A; Antos, J; Aoki, M; Apollinari, G; Arguin, J-F; Arisawa, T; Artikov, A; Ashmanskas, W; Attal, 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; Bedeschi, F; Behari, S; Belforte, S; Bellettini, G; Bellinger, J; Belloni, A; Benjamin, D; Beretvas, A; Beringer, J; Berry, T; Bhatti, A; Binkley, M; Bisello, D; 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; Brigliadori, L; Bromberg, C; Brubaker, E; Budagov, J; Budd, H S; Budd, S; Budroni, S; Burkett, K; Busetto, G; Bussey, P; Byrum, K L; Cabrera, S; Campanelli, M; Campbell, M; Canelli, F; Canepa, A; Carillo, S; Carlsmith, D; Carosi, R; 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, I; Cho, K; Chokheli, D; Chou, J P; Choudalakis, G; Chuang, S H; Chung, K; Chung, W H; Chung, Y S; Ciljak, M; Ciobanu, C I; Ciocci, M A; Clark, A; Clark, D; Coca, M; 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; Cyr, D; DaRonco, S; D'Auria, S; Davies, T; D'Onofrio, M; Dagenhart, D; de Barbaro, P; De Cecco, S; Deisher, A; De Lentdecker, G; Dell'Orso, M; Delli Paoli, F; Demortier, L; Deng, J; Deninno, M; De Pedis, D; Derwent, P F; Di Giovanni, G P; Dionisi, C; Di Ruzza, B; Dittmann, J R; Dituro, P; Dörr, C; Donati, S; Donega, M; Dong, P; Donini, J; Dorigo, T; Dube, S; Efron, J; Erbacher, R; Errede, D; Errede, S; Eusebi, R; Fang, H C; Farrington, S; Fedorko, I; Fedorko, W T; Feild, R G; Feindt, M; Fernandez, J P; Field, R; Flanagan, G; Foland, A; Forrester, S; Foster, G W; Franklin, M; Freeman, J C; Furic, I; Gallinaro, M; Galyardt, J; Garcia, J E; Garberson, F; Garfinkel, A F; Gay, C; Gerberich, H; Gerdes, D; Giagu, S; Giannetti, P; Gibson, A; Gibson, K; Gimmell, J L; Ginsburg, C; Giokaris, N; Giordani, M; Giromini, P; Giunta, M; Giurgiu, G; Glagolev, V; Glenzinski, D; Gold, M; Goldschmidt, N; Goldstein, J; Gomez, G; Gomez-Ceballos, G; Goncharov, M; González, O; Gorelov, I; Goshaw, A T; Goulianos, K; Gresele, A; Griffiths, M; 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, M; Harper, S; Harr, R F; Harris, R M; Hartz, M; Hatakeyama, K; Hauser, J; Heijboer, A; Heinemann, B; Heinrich, J; Henderson, C; Herndon, M; Heuser, J; Hidas, D; Hill, C S; Hirschbuehl, D; Hocker, A; Holloway, A; Hou, S; Houlden, M; Hsu, S-C; Huffman, B T; Hughes, R E; Husemann, U; Huston, J; Incandela, J; Introzzi, G; Iori, M; Ishizawa, Y; Ivanov, A; Iyutin, B; James, E; Jang, D; Jayatilaka, B; Jeans, D; Jensen, H; Jeon, E J; Jindariani, S; Jones, M; Joo, K K; Jun, S Y; Jung, J E; Junk, T R; Kamon, T; Karchin, P E; Kato, Y; Kemp, 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; Kondo, K; Kong, D J; Konigsberg, J; Korytov, A; Kotwal, A V; Kovalev, A; Kraan, A C; Kraus, J; Kravchenko, I; Kreps, M; Kroll, J; Krumnack, N; Kruse, M; Krutelyov, V; Kubo, T; Kuhlmann, S E; Kuhr, T; 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; Lindgren, M; Lipeles, E; Lister, A; Litvintsev, D O; Liu, T; Lockyer, N S; Loginov, A; Loreti, M; Loverre, P; Lu, R-S; Lucchesi, D; 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; Manca, G; Margaroli, F; Marginean, R; Marino, C; Marino, C P; Martin, A; Martin, M; Martin, V; Martínez, M; Maruyama, T; Mastrandrea, P; Masubuchi, T; Matsunaga, H; Mattson, M E; Mazini, R; 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; Miyamoto, A; Moed, S; Moggi, N; Mohr, B; Moore, R; Morello, M; Movilla Fernandez, P; Mülmenstädt, J; Mukherjee, A; Muller, Th; Mumford, R; Murat, P; Nachtman, J; Nagano, A; Naganoma, J; Nakano, I; Napier, A; Necula, V; Neu, C; Neubauer, M S; Nielsen, J; Nigmanov, T; Nodulman, L; Norniella, O; Nurse, E; Oh, S H; Oh, Y D; Oksuzian, I

2007-02-06

51

Searches for CP violation and pi pi S wave in the Dalitz-plot analysis of D-0 ->pi(+)pi(-)pi(0)  

Microsoft Academic Search

In e(+)e(-) collisions recorded using the CLEO II.V detector we have studied the Cabibbo suppressed decay of D-0->pi(+)pi(-)pi(0) with the initial flavor of the D-0 tagged by the decay D*+-> D(0)pi(+). We use the Dalitz-plot analysis technique to measure the resonant substructure in this final state and observe rho pi and nonresonant contributions by fitting for their amplitudes and relative

D. Cronin-Hennessy; K. Y. Gao; D. T. Gong; J. Hietala; Y. Kubota; T. Klein; B. W. Lang; S. Z. Li; R. Poling; A. W. Scott; A. Smith; S. Dobbs; Z. Metreveli; K. K. Seth; A. Tomaradze; P. Zweber; J. Ernst; A. H. Mahmood; K. Arms; K. K. Gan; H. Severini; D. M. Asner; S. A. Dytman; W. Love; S. Mehrabyan; J. A. Mueller; V. Savinov; Z. Li; A. Lopez; H. Mendez; J. Ramirez; G. S. Huang; D. H. Miller; V. Pavlunin; B. Sanghi; I. P. J. Shipsey; G. S. Adams; M. Chasse; M. Cravey; J. P. Cummings; I. Danko; J. Napolitano; Q. He; H. Muramatsu; C. S. Park; E. H. Thorndike; T. E. Coan; Y. S. Gao; F. Liu; R. Stroynowski; M. Artuso; C. Boulahouache; S. Blusk; J. Butt; E. Dambasuren; O. Dorjkhaidav; J. Li; N. Menaa; R. Nandakumar; K. Randrianarivony; R. Redjimi; R. Sia; T. Skwarnicki; S. Stone; J. C. Wang; K. Zhang; S. E. Csorna; G. Bonvicini; D. Cinabro; M. Dubrovin; A. Bornheim; S. P. Pappas; A. J. Weinstein; R. A. Briere; G. P. Chen; J. Chen; T. Ferguson; G. Tatishvili; H. Vogel; M. E. Watkins; J. L. Rosner; N. E. Adam; J. P. Alexander; K. Berkelman; D. G. Cassel; V. Crede; J. E. Duboscq; K. M. Ecklund; R. Ehrlich; L. Fields; R. S. Galik; L. Gibbons; B. Gittelman; R. Gray; S. W. Gray; D. L. Hartill; B. K. Heltsley; D. Hertz; L. Hsu; C. D. Jones; J. Kandaswamy; D. L. Kreinick; V. E. Kuznetsov; H. Mahlke-Kruger; T. O. Meyer; P. U. E. Onyisi; J. R. Patterson; D. Peterson; J. Pivarski; D. Riley; A. Ryd; A. J. Sadoff; H. Schwarthoff; X. Shi; M. R. Shepherd; S. Stroiney; W. M. Sun; D. Urner; T. Wilksen; M. Weinberger; S. B. Athar; P. Avery; L. Breva-Newell; R. Patel; V. Potlia; H. Stoeck; J. Yelton; P. Rubin; C. Cawlfield; B. I. Eisenstein; G. D. Gollin; I. Karliner; D. Kim; N. Lowrey; P. Naik; C. Plager; C. Sedlack; M. Selen; J. Williams; J. Wiss; K. W. Edwards; D. Besson; T. K. Pedlar

2005-01-01

52

First observation of the decays $\\\\overline{B}^0 \\\\to D^+ K^- \\\\pi^+ \\\\pi^-$ and $B^- \\\\to D^0 K^- \\\\pi^+ \\\\pi^-$  

Microsoft Academic Search

First observations of the Cabibbo suppressed decays $\\\\bar{B}^0\\\\to D^+K^-\\\\pi^+\\\\pi^-$ and $B^-\\\\to D^0K^-\\\\pi^+\\\\pi^-$ are reported using 35~pb$^{-1}$ of data collected with the LHCb detector. Their branching fractions are measured with respect to the corresponding Cabibbo favored decays, from which we obtain ${\\\\cal{B}}(\\\\bar{B}^0\\\\to D^+K^-\\\\pi^+\\\\pi^-)\\/{\\\\cal{B}}(\\\\bar{B}^0\\\\to D^+\\\\pi^-\\\\pi^+\\\\pi^-)=(5.9\\\\pm1.1\\\\pm0.5)\\\\times10^{-2}$ and ${\\\\cal{B}}(B^-\\\\to D^0K^-\\\\pi^+\\\\pi^-)\\/{\\\\cal{B}}(B^-\\\\to D^0\\\\pi^-\\\\pi^+\\\\pi^-)=(9.4\\\\pm1.3\\\\pm0.9)\\\\times10^{-2}$, where the uncertainties are statistical and systematic, respectively. The $B^-\\\\to D^0K^-\\\\pi^+\\\\pi^-$ decay is

R Aaij; C Abellan Beteta; B Adeva; M Adinolfi; C Adrover; A Affolder; Z Ajaltouni; J Albrecht; F Alessio; M Alexander; G Alkhazov; P Alvarez Cartelle; A A Alves; S Amato; Y Amhis; J Anderson; R B Appleby; O Aquines Gutierrez; F Archilli; L Arrabito; A Artamonov; M Artuso; E Aslanides; G Auriemma; S Bachmann; J J Back; D S Bailey; V Balagura; W Baldini; R J Barlow; C Barschel; S Barsuk; W Barter; A Bates; C Bauer; Th Bauer; A Bay; I Bediaga; S Belogurov; K Belous; I Belyaev; E Ben-Haim; M Benayoun; G Bencivenni; S Benson; J Benton; R Bernet; M-O Bettler; M van Beuzekom; A Bien; S Bifani; T Bird; A Bizzeti; P M Bjørnstad; T Blake; F Blanc; C Blanks; J Blouw; S Blusk; A Bobrov; V Bocci; A Bondar; N Bondar; W Bonivento; S Borghi; A Borgia; T J V Bowcock; C Bozzi; T Brambach; J van den Brand; J Bressieux; D Brett; M Britsch; T Britton; N H Brook; H Brown; A Büchler-Germann; I Burducea; A Bursche; J Buytaert; S Cadeddu; O Callot; M Calvi; M Calvo Gomez; A Camboni; P Campana; A Carbone; G Carboni; R Cardinale; A Cardini; L Carson; K Carvalho Akiba; G Casse; M Cattaneo; Ch Cauet; M Charles; Ph Charpentier; N Chiapolini; K Ciba; X Cid Vidal; G Ciezarek; P E L Clarke; M Clemencic; H V Cliff; J Closier; C Coca; V Coco; J Cogan; P Collins; A Comerma-Montells; F Constantin; A Contu; A Cook; M Coombes; G Corti; G A Cowan; R Currie; C D'Ambrosio; P David; I De Bonis; S De Capua; M De Cian; F De Lorenzi; J M De Miranda; L De Paula; P De Simone; D Decamp; M Deckenhoff; H Degaudenzi; L Del Buono; C Deplano; D Derkach; O Deschamps; F Dettori; J Dickens; H Dijkstra; P Diniz Batista; F Domingo Bonal; S Donleavy; F Dordei; A Dosil Suárez; D Dossett; A Dovbnya; F Dupertuis; R Dzhelyadin; A Dziurda; S Easo; U Egede; V Egorychev; S Eidelman; D van Eijk; F Eisele; S Eisenhardt; R Ekelhof; L Eklund; Ch Elsasser; D Elsby; D Esperante Pereira; L Estève; A Falabella; E Fanchini; C Färber; G Fardell; C Farinelli; S Farry; V Fave; V Fernandez Albor; M Ferro-Luzzi; S Filippov; C Fitzpatrick; M Fontana; F Fontanelli; R Forty; M Frank; C Frei; M Frosini; S Furcas; A Gallas Torreira; D Galli; M Gandelman; P Gandini; Y Gao; J-C Garnier; J Garofoli; J Garra Tico; L Garrido; D Gascon; C Gaspar; N Gauvin; M Gersabeck; T Gershon; Ph Ghez; V Gibson; V V Gligorov; C Göbel; D Golubkov; A Golutvin; A Gomes; H Gordon; M Grabalosa Gándara; R Graciani Diaz; L A Granado Cardoso; E Graugés; G Graziani; A Grecu; E Greening; S Gregson; B Gui; E Gushchin; Yu Guz; T Gys; G Haefeli; C Haen; S C Haines; T Hampson; S Hansmann-Menzemer; R Harji; N Harnew; J Harrison; P F Harrison; T Hartmann; J He; V Heijne; K Hennessy; P Henrard; J A Hernando Hernando Morata; E van Herwijnen; E Hicks; K Holubyev; P Hopchev; W Hulsbergen; P Hunt; T Huse; R S Huston; D Hutchcroft; D Hynds; V Iakovenko; P Ilten; J Imong; R Jacobsson; A Jaeger; M Jahjah Hussein; E Jans; F Jansen; P Jaton; B Jean-Marie; F Jing; M John; D Johnson; C R Jones; B Jost; M Kaballo; S Kandybei; M Karacson; T M Karbach; J Keaveney; I R Kenyon; U Kerzel; T Ketel; A Keune; B Khanji; Y M Kim; M Knecht; R Koopman; P Koppenburg; A Kozlinskiy; L Kravchuk; K Kreplin; M Kreps; G Krocker; P Krokovny; F Kruse; K Kruzelecki; M Kucharczyk; T Kvaratskheliya; V N La Thi; D Lacarrere; G Lafferty; A Lai; D Lambert; R W Lambert; E Lanciotti; G Lanfranchi; C Langenbruch; T Latham; C Lazzeroni; R Le Gac; J van Leerdam; J-P Lees; R Lefèvre; A Leflat; J Lefrançois; O Leroy; T Lesiak; L Li; L Li Gioi; M Lieng; M Liles; R Lindner; C Linn; B Liu; G Liu; J von Loeben; J H Lopes; E Lopez Asamar; N Lopez-March; H Lu; J Luisier; F Machefert; I V Machikhiliyan; F Maciuc; O Maev; J Magnin; S Malde; R M D Mamunur; G Manca; G Mancinelli; N Mangiafave; U Marconi; R Märki; J Marks; G Martellotti; A Martens; L Martin; A Martín Sánchez; D Martinez Santos; A Massafferri; Z Mathe; C Matteuzzi; M Matveev; E Maurice; B Maynard; A Mazurov; G McGregor; R McNulty; M Meissner; M Merk; J Merkel; R Messi; S Miglioranzi; D A Milanes; M-N Minard; J Molina Rodriguez; S Monteil; D Moran; P Morawski; I Mous; F Muheim; K Müller; R Muresan; B Muryn; B Muster; M Musy; J Mylroie-Smith; P Naik; T Nakada; R Nandakumar; I Nasteva; M Nedos; M Needham; N Neufeld; C Nguyen-Mau; M Nicol; V Niess; N Nikitin; A Nomerotski; A Novoselov; A Oblakowska-Mucha; V Obraztsov; S Oggero; S Ogilvy; O Okhrimenko; R Oldeman; M Orlandea; J M Otalora Goicochea; P Owen; K Pal; J Palacios; A Palano; M Palutan; J Panman; A Papanestis; M Pappagallo; C Parkes; C J Parkinson; G Passaleva; G D Patel; M Patel; S K Paterson; G N Patrick; C Patrignani; C Pavel-Nicorescu; A Pazos Alvarez; A Pellegrino; G Penso; M Pepe Altarelli; S Perazzini; D L Perego; E Perez Trigo; A Pérez-Calero Yzquierdo; P Perret; M Perrin-Terrin; G Pessina; A Petrella; A Petrolini; A Phan; E Picatoste Olloqui; B Pie Valls; B Pietrzyk; T Pila?; D Pinci; R Plackett; S Playfer; M Plo Casasus; G Polok; A Poluektov; E Polycarpo; D Popov

2012-01-01

53

Study of the process e+e- --> pi+pi-pi0pi0 at energies &surd;s < 1 GeV  

Microsoft Academic Search

In an experiment with the Spherical Neutral Detector at VEPP-2M collider the cross section of the process e+e- --> pi+pi-pi0pi0 was measured. At energies &surd;s pi +pi-pi0pi0 was found to be Brho = (1.60±0.74±0.18) × 10-5. The upper limit for the decay omega --> pi+pi-pi0pi0 was improved by two orders of magnitude compared to the previous measurements and is Bomega

M. N. Achasov; K. I. Beloborodov; A. V. Berdyugin; A. A. Botov; V. B. Golubev; T. V. Dimova; V. P. Druzhinin; L. V. Kardapoltsev; A. G. Kharlamov; D. P. Kovrizhin; I. A. Koop; A. A. Korol; S. V. Koshuba; A. E. Obrazovsky; E. V. Pakhtusova; D. A. Shtol; S. I. Serednyakov; Z. K. Silagadze; A. N. Skrinsky; Yu. A. Tikhonov; Yu. M. Shatunov; A. V. Vasil'ev

2010-01-01

54

Study of the e+e--->pi+pi-pi0 process using initial state radiation with BABAR  

Microsoft Academic Search

The process e+e--->pi+pi-pi0gamma has been studied at a center-of-mass energy near the Upsilon(4S) resonance using a 89.3 fb-1 data sample collected with the BABAR detector at the PEP-II collider. From the measured 3pi mass spectrum we have obtained the products of branching fractions for the omega and varphi mesons, B(omega-->e+e-)B(omega-->3pi)=(6.70±0.06±0.27)×10-5 and B(varphi-->e+e-)B(varphi-->3pi)=(4.30±0.08±0.21)×10-5 and evaluated the e+e--->pi+pi-pi0 cross section for the

B. Aubert; R. Barate; D. Boutigny; F. Couderc; J.-M. Gaillard; A. Hicheur; Y. Karyotakis; J. P. Lees; V. Tisserand; A. Zghiche; 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; V. G. Shelkov; 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; M. Steinke; J. T. Boyd; 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; S. D. Foulkes; J. W. Gary; 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; B. Dahmes; O. Long; A. Lu; M. A. Mazur; J. D. Richman; W. Verkerke; T. W. Beck; A. M. Eisner; 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; T. Abe; F. Blanc; P. Bloom; S. Chen; W. T. Ford; U. Nauenberg; A. Olivas; P. Rankin; J. G. Smith; J. Zhang; L. Zhang; A. Chen; J. L. Harton; A. Soffer; W. H. Toki; R. J. Wilson; Q. L. Zeng; D. Altenburg; T. Brandt; J. Brose; M. Dickopp; E. Feltresi; A. Hauke; H. M. Lacker; R. Müller-Pfefferkorn; R. Nogowski; S. Otto; A. Petzold; J. Schubert; K. R. Schubert; R. Schwierz; B. Spaan; J. E. Sundermann; D. Bernard; G. R. Bonneaud; F. Brochard; P. Grenier; S. Schrenk; Ch. Thiebaux; G. Vasileiadis; M. Verderi; D. J. Bard; P. J. Clark; D. Lavin; 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; E. Treadwell; 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; 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; J. Cochran; H. B. Crawley; J. Lamsa; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; J. Yi; M. Biasini; R. Covarelli; M. Pioppi; M. Davier; X. Giroux; G. Grosdidier; A. Höcker; S. Laplace; F. Le Diberder; V. Lepeltier; A. M. Lutz; T. C. Petersen; S. Plaszczynski; M. H. Schune; L. Tantot; 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; R. J. Sloane; C. Touramanis; J. J. Back; C. M. Cormack; P. F. Harrison; F. Di Lodovico; G. B. Mohanty; C. L. Brown; G. Cowan; R. L. Flack; H. U. Flaecher; M. G. Green; P. D. Jackson; T. R. McMahon; S. Ricciardi; F. Salvatore; M. A. Winter; C. L. Davis; J. Allison; N. R. Barlow; R. J. Barlow; P. A. Hart; M. C. Hodgkinson; G. D. Lafferty; A. J. Lyon; J. C. Williams; A. Farbin; W. D. Hulsbergen; A. Jawahery; D. Kovalskyi; C. K. Lae; V. Lillard; D. A. Roberts; G. Blaylock; C. Dallapiccola; K. T. Flood; S. S. Hertzbach; R. Kofler; V. B. Koptchev; T. B. Moore; S. Saremi; H. Staengle; S. Willocq; R. Cowan; G. Sciolla; S. J. Sekula; F. Taylor; R. K. Yamamoto; D. J. Mangeol; 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; K. K. Gan; K. Honscheid; D. Hufnagel; H. Kagan; R. Kass; T. Pulliam; A. M. Rahimi

2004-01-01

55

Dominant processes in the reaction pip --> pi-pi-pi+p at 3.9 GeV\\/c  

Microsoft Academic Search

New experimental results are reported for 7975 events of the type pi-p --> pi-pi-pi+p at 3.9 GeV\\/c. A model based on pion exchange, rho exchange and diffraction dissociation is demonstrated to explain all the main features of the data. Only the relative amount of each of five dominant resonance production processes was varied in a maximum likelihood fit with no

P. G. Wohlmut; K. Abe; A. D. Johnson; V. J. Stenger

1970-01-01

56

Bioorganometallic chemistry. 8. The molecular recognition of aromatic and aliphatic amino acids and substituted aromatic and aliphatic carboxylic acid guests with supramolecular ({eta}{sup 5}-pentamethylcyclopentadienyl)rhodium - nucleobase, nucleoside, and nucleotide cyclic trimer hosts via non-covalent {pi}-{pi} and hydrophobic interactions in water: Steric, electronic, and conformational parameters  

SciTech Connect

Molecular recognition, via non-covalent processes such as hydrogen bonding, {pi}-{pi}, and hydrophobic interactions, is an important biological phenomenon for guests, such as drugs, proteins, and other important biological molecules with, for example, host DNA/RNA. We have studied a novel molecular recognition process using guests that encompass aromatic and aliphatic amino acids [L-alanine, L-glutamine (L-Gln), L-histidine, L-isoleucine(L-Ile), L-leucine(L-Leu), L-phenylalanine(L-Phe), L-proline, L-tryptophan(L-Trp), L-valine(L-Val)], substituted aromatic carboxylic acids o-, m-, p-aminobenzoic acids (G1-3), benzoic acid (G4), phenylacetic acid (G5), p-methoxyphenylacetic acid (G6), o-methyoxybenozoic acid (G9), o-nitrobenzoic acid (G10), and aliphatic carboxylic acids [cyclohexylacetic acid (G7), 1-adamantanecarboxylic acid (G8)] with supramolecular, bioorganometallic hosts, ({eta}{sup 5}-pentamethylcyclopentadienyl)rhodium (Cp{sup *}Rh)-nucleobase, nucleoside, and nucleotide cyclic trimer complexes in aqueous solution at pH 7, utilizing {sup 1}H NMR, NOE, and molecular modeling techniques, and, as well, determining association constants (K{sub a}) and free energies of complexation ({Delta}{degree}G). The host-guest complexation occurs predominantly via non-covalent {pi}-{pi}, hydrophobic, and possible subtle H-bonding interactions, with steric, electronic, and molecular conformational parameters as important criteria. 8 refs., 6 figs., 3 tabs.

Chen, H.; Ogo, Seiji; Fish, R.H. [Lawrence Berkeley National Lab., CA (United States)]|[Univ. of California, Berkeley, CA (United States)

1996-05-29

57

Analytical {pi}{pi} scattering amplitude and the light scalars  

SciTech Connect

In this work we construct the {pi}{pi} scattering amplitude T{sub 0}{sup 0} with regular analytical properties in the s complex plane, which describes simultaneously the data on the {pi}{pi} scattering, {phi}{yields}{pi}{sup 0}{pi}0{gamma} decay, and {pi}{pi}{yields}KK reaction. The chiral shielding of the {sigma}(600) meson and its mixing with the f{sub 0}(980) meson are also taken into account. The data agrees with the four-quark nature of the {sigma}(600) and f{sub 0}(980) mesons. The amplitude in the range -5m{sub {pi}}{sup 2}

Achasov, N. N. [Laboratory of Theoretical Physics, Sobolev Institute for Mathematics, 630090, Novosibirsk (Russian Federation); Kiselev, A. V. [Laboratory of Theoretical Physics, Sobolev Institute for Mathematics, 630090, Novosibirsk (Russian Federation); Novosibirsk State University, 630090, Novosibirsk (Russian Federation)

2011-03-01

58

Possible resolution of the B{yields}{pi}{pi}, {pi}K puzzles  

SciTech Connect

We show that there exist uncanceled soft divergences in the k{sub T} factorization for nonfactorizable amplitudes of two-body nonleptonic B meson decays, similar to those identified in hadron hadroproduction. These divergences can be grouped into a soft factor using the eikonal approximation, which is then treated as an additional nonperturbative input in the perturbative QCD formalism. Viewing the special role of the pion as a qq bound state and as a pseudo Nambu-Goldstone boson, we postulate that the soft effect associated with it is significant. This soft factor enhances the nonfactorizable color-suppressed tree amplitudes, such that the branching ratios B({pi}{sup 0}{pi}{sup 0}) and B({pi}{sup 0}{rho}{sup 0}) are increased under the constraint of the B({rho}{sup 0}{rho}{sup 0}) data, the difference between the direct CP asymmetries A{sub CP}({pi}{sup {+-}}K{sup {+-}}) and A{sub CP}({pi}{sup 0}K{sup {+-}}) is enlarged, and the mixing-induced CP asymmetry S{sub {pi}}{sup 0}{sub K{sub S}} is reduced. Namely, the known {pi}{pi} and {pi}K puzzles can be resolved simultaneously.

Li Hsiangnan [Institute of Physics, Academia Sinica, Taipei, Taiwan 115 (China) and Department of Physics, Tsing-Hua University, Hsinchu, Taiwan 300 (China) and Department of Physics, National Cheng-Kung University, Tainan, Taiwan 701 (China); Mishima, Satoshi [Theory Group, Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg (Germany)

2011-02-01

59

Hadronic decays of the tau lepton : {tau}- {yields} ({pi}{pi}{pi})- {nu}{tau} within Resonance Chiral Theory  

SciTech Connect

{tau} decays into hadrons foresee the study of the hadronization of vector and axial-vector QCD currents, yielding relevant information on the dynamics of the resonances entering into the processes. We analyse {tau} {yields} {pi}{pi}{pi}{nu}{tau} decays within the framework of the Resonance Chiral Theory, comparing this theoretical scheme with the experimental data, namely ALEPH spectral function and branching ratio. Hence we get values for the mass and on-shell width of the a 1 (1260) resonance, and provide the structure functions that have been measured by OPAL and CLEO-II.

Gomez Dumm, D. [IFLP, CONICET - Depto. de Fisica, Univ. Nac. de la Plata, C.C. 67, 1900 La Plata (Argentina); Pich, A.; Portoles, J. [Instituto de Fisica Corpuscular, IFIC, CSIC-Universitat de Valencia, Edifici d'Instituts de Paterna, Apt. Correus 22085, E-46071 Valencia (Spain)

2006-01-12

60

{pi} p and {pi}{pi} scattering at LHC  

SciTech Connect

Can we get the information on {pi} p and {pi}{pi} scattering from the LHC data? We present briefly recent results of the IHEP Diffractive Group, which include all the steps: formulation of the problem, an idea how to solve it, experimental tools, Monte-Carlo simulation and preliminary expectations concerning the first data from the LHC.

Ryutin, R.; Petrov, V.; Sobol, A. [Institute for High Energy Physics, 142281 Protvino (Russian Federation)

2011-07-15

61

$pi$$pi$$gamma$ DECAY MODE OF NEUTRAL K MESONS  

Microsoft Academic Search

The decay K yields pi \\/sup +\\/ + pi ⁻+ gamma , gamma yields ; e\\/sup +\\/ + e⁻ has been observed in the film of the UCRL 72-in. hydrogen ; bubble chamber exposed to a beam of 1325-Mev\\/c momentum negative pions. This ; event unambiguously fits only the decay mode K yields pi + pi + gamma , ;

1962-01-01

62

On the $D^+_s \\\\to \\\\pi^+ \\\\pi^+ \\\\pi^-$ - nonresonant decay in the effective quark model with chiral symmetry  

Microsoft Academic Search

The partial widths of the decays $D^+_s \\\\to \\\\phi \\\\pi^+$ and $D^+_s \\\\to \\\\pi^+\\u000a\\\\pi^+ \\\\pi^-$ - nonresonant are computed within the effective quark model with\\u000achiral symmetry involving Heavy quark effective theory (HQET) and Chiral\\u000aperturbation theory at the quark level (CHPT)$_q$ with linear realization of\\u000achiral U(3) x U(3) symmetry. It is shown that for the explanation of

A. N. Ivanov; N. I. Troitskaya

1997-01-01

63

Toward the design and synthesis of lithium-ion intercalation into a coordination pi-pi framework host.  

PubMed

A pi-stacked coordination solid, [[[(VO)2(OH)2(C4O4)(phen)2] x H2O]n] (1: phen = phenanthroline), was synthesized by hydrothermal methods and structurally characterized by X-ray single-crystal diffraction. The structure of 1 adopts a neutral open framework in which channeling apertures and windows are surrounded by four oxovanadyl dimers, two squarates, and two pairs of pi-pi interactions of phenanthroline groups; the dimensions of the windows are about 5.38 x 7.55 A along the c axis. Surprisingly, the porous framework with hydrophilic and hydrophobic characteristics was thermally stable up to 250 degrees C, as indicated from powder X-ray diffraction patterns and thermogravimetric analysis. Further investigation of lithium-ion intercalation into the channel matrix of 1 was conformed by 7Li NMR spectroscopy and cyclic votammetry measurements. The present case represents the first example of a porous coordination solid that possesses polar channels capable of mediating lithium-ion insertion. PMID:11843152

Huang, Lih-Wen; Yang, Chia-jung; Lin, Kuan-Jiuh

2002-01-18

64

Stacking interactions in PUF?RNA complexes  

SciTech Connect

Stacking interactions between amino acids and bases are common in RNA-protein interactions. Many proteins that regulate mRNAs interact with single-stranded RNA elements in the 3' UTR (3'-untranslated region) of their targets. PUF proteins are exemplary. Here we focus on complexes formed between a Caenorhabditis elegans PUF protein, FBF, and its cognate RNAs. Stacking interactions are particularly prominent and involve every RNA base in the recognition element. To assess the contribution of stacking interactions to formation of the RNA-protein complex, we combine in vivo selection experiments with site-directed mutagenesis, biochemistry, and structural analysis. Our results reveal that the identities of stacking amino acids in FBF affect both the affinity and specificity of the RNA-protein interaction. Substitutions in amino acid side chains can restrict or broaden RNA specificity. We conclude that the identities of stacking residues are important in achieving the natural specificities of PUF proteins. Similarly, in PUF proteins engineered to bind new RNA sequences, the identity of stacking residues may contribute to 'target' versus 'off-target' interactions, and thus be an important consideration in the design of proteins with new specificities.

Yiling Koh, Yvonne; Wang, Yeming; Qiu, Chen; Opperman, Laura; Gross, Leah; Tanaka Hall, Traci M.; Wickens, Marvin (NIH); (UW)

2012-07-02

65

The energy dependence of the 3pi effective mass spectrum in the reaction pi-p --> ppi+pi-pi-  

Microsoft Academic Search

For the reaction pi-p --> ppi+pi-pi- at incident lab momenta from 2.7 to 20 GeV\\/c, the variation of the cross section of various intervals of the pi+pi-pi- effective mass distribution with the incident lab momentum of the An essentially energy-independent cross section for the production of pi+pi-pi- effective masses less than 1.4 GeV, i.e. the ``A'' meson region, is observed

K. Paler

1970-01-01

66

Observation of the radiative decay J/psi. -->. gamma. eta. pi pi  

SciTech Connect

The radiative decay J/psi ..-->.. ..gamma.. eta ..pi pi.. has been observed in data taken with the Crystal Ball detector at the SPEAR e/sup +/e/sup -/ storage ring. In addition to the well-known eta', the eta ..pi pi.. mass spectrum shows a broad enhancement centered at approx. 1700 MeV. There is no explicit evidence for the l(1440) in the eta ..pi pi.. mass spectrum.

Newman-Holmes, C.

1982-09-01

67

The e+e--->3(pi+pi-), 2(pi+pi-pi0) and K+K-2(pi+pi-) cross sections at center-of-mass energies from production threshold to 4.5 GeV measured with initial-state radiation  

Microsoft Academic Search

We study the processes e+e--->3(pi+pi-)gamma, 2(pi+pi-pi0)gamma and K+K-2(pi+pi-)gamma, with the photon radiated from the initial state. About 20 000, 33 000 and 4000 fully reconstructed events, respectively, have been selected from 232 fb-1 of BABAR data. The invariant mass of the hadronic final state defines the effective e+e- center-of-mass energy, so that these data can be compared with the corresponding

B. Aubert; R. Barate; 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. S. Best; 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. 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; M. Fritsch; 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; E. A. Kravchenko; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; E. P. Solodov; K. Yu Todyshev; 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; D. Del Re; 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; 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; G. P. Dubois-Felsmann; 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; M. Dickopp; V. Klose; H. M. Lacker; R. Nogowski; S. Otto; A. Petzold; J. Schubert; K. R. Schubert; R. Schwierz; J. E. Sundermann; A. Volk; D. Bernard; G. R. Bonneaud; P. Grenier; E. Latour; S. Schrenk; Ch. Thiebaux; G. Vasileiadis; M. Verderi; D. J. Bard; P. J. Clark; W. Gradl; F. Muheim; S. Playfer; Y. Xie; M. Andreotti; D. Bettoni; C. Bozzi; R. Calabrese; G. Cibinetto; E. Luppi; M. Negrini; L. Piemontese; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; G. Finocchiaro; S. Pacetti; P. Patteri; I. M. Peruzzi; M. Piccolo; 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. Nash; M. B. Nikolich; W. Panduro Vazquez; X. Chai; M. J. Charles; W. F. Mader; U. Mallik; V. Ziegler; J. Cochran; H. B. Crawley; L. Dong; V. Eyges; W. T. Meyer; S. Prell; E. I. Rosenberg; A. E. Rubin; G. Schott; N. Arnaud; M. Davier; G. Grosdidier; A. Höcker; F. Le Diberder; V. Lepeltier; A. M. Lutz; A. Oyanguren; T. C. Petersen; 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; A. J. Bevan; 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; F. Di Lodovico; W. Menges; R. Sacco; C. L. Brown; G. Cowan; H. U. Flaecher; M. G. Green; D. A. Hopkins; P. D. 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; D. Kovalskyi; C. K. Lae; D. A. Roberts; G. Simi; G. Blaylock; C. Dallapiccola; S. S. Hertzbach; R. Kofler; 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; 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. 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

2006-01-01

68

The Search for Exotic Mesons in gammap-->pi+pi+pi?n with CLAS at Jefferson Lab  

SciTech Connect

In addition to ordinary qq-bar pairs, quantum chromodynamics (QCD) permits many other possibilities in meson spectra, such as gluonic hybrids, glueballs, and tetraquarks. Experimental discovery and study of these exotic states provides insight on the nonperturbative regime of QCD. Over the past twenty years, some searches for exotic mesons have met with controversial results, especially those obtained in the three-pion system. Prior theoretical work indicates that in photoproduction one should find gluonic hybrids at significantly enhanced levels compared to that found in pion production. To that end, the CLAS g12 run was recently completed at Jefferson Lab, using a liquid hydrogen target and tagged photons from a 5.71 GeV electron beam. The CLAS experimental apparatus was modified to maximize forward acceptance for peripheral production of mesons. The resulting data contains the world's largest 3pi photoproduction dataset, with gammap-->pi+pi+pi?n events numbering in the millions. Early results describing the data quality, kinematics, and dysnamics will be shown.

Craig Bookwalter

2010-08-01

69

Photoproduction of pi+pi-pi0 on hydrogen with linearly polarized photons of energy 20-70 GeV  

Microsoft Academic Search

Results on photoproduction of pi+pi-pi0 in the photon energy range 20-70 GeV are presented. For the omega meson, the production cross-section is found to be 1010+\\/-15 (statistical)+\\/-290 (systematic) nb and is constant over the incident photon energy range. Spin-density matrix elements are evaluated for omega meson production. The phi meson is observed with a total photoproduction cross section (corrected for

M. Atkinson; T. J. Axon; D. Barberis; T. J. Brodbeck; G. R. Brookes; J. J. Bunn; P. J. Bussey; A. B. Clegg; J. B. Dainton; M. Davenport; B. Dickinson; B. Diekmann; A. Donnachie; R. J. Ellison; P. Flower; P. J. Flynn; W. Galbraith; K. Heinloth; R. C. W. Henderson; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; H. P. Jakob; M. Jung; M. A. R. Kemp; B. R. Kumar; J. Laberrigue; G. D. Lafferty; J. C. Lassalle; J. M. Lévy; V. Liebenau; R. H. McClatchey; D. Mercer; J. A. G. Morris; J. V. Morris; D. Newton; C. Paterson; G. N. Patrick; E. Paul; C. Raine; M. Reidenbach; H. Rotscheidt; A. Schlösser; P. H. Sharp; I. O. Skillicorn; K. M. Smith; K. M. Storr; R. J. Thompson; Ch. de La Vaissière; A. P. Waite; M. F. Worsell; T. P. Yiou

1984-01-01

70

Study of the D0 \\to Pi Pi- Pi0 Decay at BaBar  

SciTech Connect

The Dalitz-plot of the decay D{sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0} measured by the BABAR collaboration shows the structure of a final state having quantum numbers I{sup G}J{sup PC} = 0{sup -}0{sup 2-}. An isospin analysis of this Dalitz-plot finds that the fraction of the I = 0 contribution is about 96%. This high I = 0 contribution is unexpected because the weak interaction violates the isospin.

Gaspero, Mario; /Rome U. /INFN, Rome

2012-04-06

71

Aromatic stacking interactions in flavin model systems.  

PubMed

Flavins feature multiple attributes that explain their widespread occurrence in nature, including photostability, reversible electrochemistry, and especially the tunability of their optical, electronic, and redox properties by supramolecular interactions and modification of their chemical structure. Flavins are important redox cofactors for enzymatic catalysis and are central to a wide variety of processes, including biosynthesis, electron transport, photosynthesis, and DNA repair. The wide range of processes catalyzed by flavins makes them promising leads for synthetic catalysts. Their properties are also relevant to organic electronic and optoelectronic devices, where they have the potential to serve as photoactive electron carriers, a very uncommon property in current photovoltaic systems. In flavoenzymes, the flavin cofactor binds to the active site of the apoenzyme through noncovalent interactions. These interactions regulate cofactor recognition and tune the redox behavior of the flavin cofactor. In this Account, we describe the creation of host-guest systems based on small molecule, polymer, and nanoparticle scaffolds that explore the role of aromatic stacking on the redox properties of the flavin and provide insight into flavoenzyme function. We also describe the creation of synthetic flavin-based interlocked structures featuring aromatic stacking interactions, along with the use of aromatic stacking to direct self-assembly of flavin-based materials. The interplay between redox events and aromatic stacking interactions seen in these synthetic models is important for fundamental understanding of biological systems including the flavoenzymes. The precise control of aromatic interactions and binding of flavins not only underpins their biological activity but gives them the potential to be developed into novel organic optoelectronic materials based on tuned synthetic flavin-receptor assemblies. In a broader context, the redox properties of the flavin provide a very concise tool for looking at the role of electronics in aromatic stacking, an issue of general importance in biological and supramolecular chemistry. PMID:23163808

Nandwana, Vikas; Samuel, Ifor; Cooke, Graeme; Rotello, Vincent M

2012-11-19

72

Engineering double to quintuple stacks of a polarized aromatic in confined cavities.  

PubMed

Discrete, well-defined stacks of the polarized aromatic pyrene-4,5-dione (1) were assembled in the cavities of organic-pillared coordination cages (2). The number (n) of stacked guests depends on the pillar length, and up to quintuple stacks (n = 5) were observed when long (16.5 A) organic pillar ligands were incorporated. As previously reported, pyrene-4,5-dione (1) assembles into infinite columnar stacks in the solid state, but the present work demonstrates that the polarized 1 has a strong propensity to stack in layers even in the absence of crystal packing effects. For n = 2 and 3 structures, crystallographic studies revealed that 1 stacks by pi-pi interactions in the cavity in such a way that a net dipole moment is canceled. These results emphasize the important role of dipole-dipole interactions as well as pi-stacking interactions in the formation of columnar stacks of 1. PMID:20041719

Yamauchi, Yoshihiro; Yoshizawa, Michito; Akita, Munetaka; Fujita, Makoto

2010-01-27

73

No indication of f{sub 0}(1370) in {pi}{pi} phase shift analyses  

SciTech Connect

The scalar meson f{sub 0}(1370) - indicated in particular in the low energy pp-bar{yields}3 body reactions - is a crucial element in certain schemes of the scalar meson spectroscopy including glueballs. The most definitive results can be obtained from elastic and inelastic {pi}{pi} phase shift analyses using the constraints from unitarity where the discrete ambiguities can be identified and resolved. We reconsider the phase shift analyses for {pi}{sup +{pi}-{yields}{pi}+{pi}-}, {pi}{sup 0{pi}0}, KK-bar, {eta}{eta}. While a clear resonance signal for f{sub 0}(1500) in the resp. Argand diagrams is seen in all channels above a large 'background' from f{sub 0}(600) there is no clear signal of a second resonance 'f{sub 0}(1370)' in this mass range in any reaction, at the level of {approx}10% branching ratio into {pi}{pi}.

Ochs, Wolfgang [Max-Planck-Institut fuer Physik, D-80805 Munich, Foehringer Ring 6 (Germany)

2010-08-05

74

Measurement of the branching fraction for D+-->K-pi+pi+  

Microsoft Academic Search

Using the CLEO II detector at the Cornell Electron Storage Ring we have measured the ratio of branching fractions, B(D+-->K-pi+pi+)\\/(D0-->K-pi+)=2.35+\\/-0.16+\\/-0.16. Our recent measurement of scrB(D0-->K-pi+) then gives scrB(D+-->K-pi+pi+)=(9.3+\\/-0.6+\\/-0.8)%.

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; 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; 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; 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. 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; 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

1994-01-01

75

Evidence for the decay D0-->K(-)pi(+)pi(-)e(+)nu(e).  

PubMed

Using a 281 pb{-1} data sample collected at the psi(3770) with the CLEO-c detector, we present the first absolute branching fraction measurement of the decay D0-->K(-)pi(+)pi(-)e(+)nu(e) at a statistical significance of about 4.0 standard deviations. We find 10 candidates consistent with the decay D0-->K(-)pi(+)pi(-)e(+)nu(e). The probability that a background fluctuation accounts for this signal is less than 4.1 x 10{-5}. We find B(D0-->K(-)pi(+)pi(-)e(+)nu(e)) = [2.8{-1.1}{+1.4}(stat)+/-0.3(syst)]x10{-4}. By restricting the invariant mass of the hadronic system to be consistent with K1(1270), we obtain the product of branching fractions B(D{0}-->K{1}{-}(1270)e{+}nu{e})xB(K1-(1270)-->K{-}pi{+}pi{-})=[2.5{-1.0}{+1.3}(stat)+/-0.2(syst)]x10{-4}. Using B(K1-(1270)-->K{-}pi{+}pi{-})=(33+/-3)%, we obtain B(D{0}-->K{1}{-}(1270)e{+}nu{e})=[7.6{-3.0}{+4.1}(stat)+/-0.6(syst)+/-0.7]x10{-4}. The last error accounts for the uncertainties in the measured K1-(1270)-->K{-}pi{+}pi{-} branching fractions. PMID:18233062

Artuso, M; Blusk, S; Butt, J; Li, J; Menaa, N; Mountain, R; Nisar, S; Randrianarivony, K; Sia, R; Skwarnicki, T; Stone, S; Wang, J C; Zhang, K; Bonvicini, G; Cinabro, D; Dubrovin, M; Lincoln, A; Asner, D M; Edwards, K W; Naik, P; Briere, R A; Ferguson, T; Tatishvili, G; Vogel, H; Watkins, M E; Rosner, J L; Adam, N E; 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; Jones, C D; Kandaswamy, J; Kreinick, D L; Kuznetsov, V E; Mahlke-Krüger, H; Mohapatra, D; Onyisi, P U E; Patterson, J R; Peterson, D; Pivarski, J; Riley, D; Ryd, A; Sadoff, A J; Schwarthoff, H; Shi, X; Stroiney, S; Sun, W M; Wilksen, T; Athar, S B; Patel, R; Potlia, V; Yelton, J; Rubin, P; Cawlfield, C; Eisenstein, B I; Karliner, I; Kim, D; Lowrey, N; Selen, M; White, E J; Wiss, J; Mitchell, R E; Shepherd, M R; Besson, D; Pedlar, T K; Cronin-Hennessy, D; Gao, K Y; Hietala, J; Kubota, Y; Klein, T; Lang, B W; Poling, R; Scott, A W; Smith, A; Zweber, P; Dobbs, S; Metreveli, Z; Seth, K K; Tomaradze, A; Ernst, J; Ecklund, K M; Severini, H; Love, W; Savinov, V; Aquines, O; Lopez, A; Mehrabyan, S; Mendez, H; Ramirez, J; Huang, G S; Miller, D H; Pavlunin, V; Sanghi, B; Shipsey, I P J; Xin, B; Adams, G S; Anderson, M; Cummings, J P; Danko, I; Hu, D; Moziak, B; Napolitano, J; He, Q; Insler, J; Muramatsu, H; Park, C S; Thorndike, E H; Yang, F

2007-11-05

76

Search for b-->u transitions in B>[K+pi-pi0]DK  

Microsoft Academic Search

We search for decays of a B meson into a neutral D meson and a charged kaon, with the D meson decaying into a charged kaon, a charged pion, and a neutral pion. This final state can be reached through the b-->c transition B--->D0K- followed by the doubly Cabibbo-suppressed D0-->K+pi-pi0, or the b-->u transition B--->D¯0K- followed by the Cabibbo-favored D¯0-->K+pi-pi0.

B. Aubert; M. Bona; D. Boutigny; Y. Karyotakis; J. P. Lees; V. Poireau; X. Prudent; V. Tisserand; A. Zghiche; J. Garra Tico; E. Grauges; L. Lopez; A. Palano; G. Eigen; B. Stugu; L. Sun; G. S. Abrams; M. Battaglia; D. N. Brown; J. Button-Shafer; R. N. Cahn; 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. T. Ronan; K. Tackmann; W. A. Wenzel; P. Del Amo Sanchez; C. M. Hawkes; A. T. Watson; T. Held; H. Koch; B. Lewandowski; M. Pelizaeus; T. Schroeder; M. Steinke; D. Walker; D. J. Asgeirsson; T. Cuhadar-Donszelmann; B. G. Fulsom; C. Hearty; T. S. Mattison; J. A. McKenna; A. Khan; 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; 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; S. D. Foulkes; J. W. Gary; F. Liu; O. Long; B. C. Shen; L. Zhang; 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; T. Schalk; B. A. Schumm; A. Seiden; M. G. Wilson; L. O. Winstrom; E. Chen; C. H. Cheng; 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; S. Chen; W. T. Ford; J. F. Hirschauer; A. Kreisel; M. Nagel; U. Nauenberg; A. Olivas; J. G. Smith; K. A. Ulmer; S. R. Wagner; J. Zhang; A. M. Gabareen; A. Soffer; W. H. Toki; R. J. Wilson; F. Winklmeier; 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; F. Muheim; S. Playfer; A. I. Robertson; Y. Xie; 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; J. Wu; R. S. Dubitzky; J. Marks; S. Schenk; U. Uwer; D. J. Bard; P. D. Dauncey; R. L. Flack; J. A. Nash; W. Panduro Vazquez; M. Tibbetts; P. K. Behera; X. Chai; M. J. Charles; U. Mallik; V. Ziegler; 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; M. Davier; G. Grosdidier; A. Höcker; V. Lepeltier; F. Le Diberder; A. M. Lutz; S. Pruvot; S. Rodier; P. Roudeau; M. H. Schune; J. Serrano; V. Sordini; A. Stocchi; W. F. Wang; G. Wormser; D. J. Lange; D. M. Wright; I. Bingham; C. A. Chavez; I. J. Forster; J. R. Fry; E. Gabathuler; R. Gamet; D. E. Hutchcroft; D. J. Payne; K. C. Schofield; C. Touramanis; A. J. Bevan; K. A. George; F. di Lodovico; W. Menges; R. Sacco; G. Cowan; H. U. Flaecher; D. A. Hopkins; S. Paramesvaran; 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; T. J. West; J. I. Yi; J. Anderson; C. Chen; A. Jawahery; D. A. Roberts; G. Simi; J. M. Tuggle; G. Blaylock; 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; S. J. Sekula; M. Spitznagel; F. Taylor; R. K. Yamamoto; M. Zhao; Y. Zheng; 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; F. Fabozzi; L. Lista; D. Monorchio; C. Sciacca; M. A. Baak; G. Raven; H. L. Snoek; C. P. Jessop; J. M. Losecco; G. Benelli; L. A. Corwin; K. Honscheid; H. Kagan; R. Kass; J. P. Morris; A. M. Rahimi; J. J. Regensburger; 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; 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; L. Gladney; M. Biasini; R. Covarelli; E. Manoni; C. Angelini; G. Batignani

2007-01-01

77

Measurement of the D+-->pi+pi0 and D+-->K+pi0 branching fractions  

Microsoft Academic Search

We present measurements of the branching fractions for the Cabbibo suppressed decays D+-->pi+pi0 and D+-->K+pi0 based on a data sample corresponding to an integrated luminosity of 124.3fb-1. The data were taken with the BABAR detector at the PEP-II B Factory operating on and near the Upsilon(4S) resonance. We find B(D+-->pi+pi0)=(1.25±0.10±0.09±0.04)×10-3 and B(D+-->K+pi0)=(2.52±0.47±0.25±0.08)×10-4, where the first uncertainty is statistical, the second

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; 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; 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. M. 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; 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; 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; O. Igonkina; M. Lu; C. T. Potter; R. Rahmat

2006-01-01

78

Study of CP-violating asymmetries in B0-->pi+pi-, K+pi- decays  

Microsoft Academic Search

We present a measurement of the time-dependent CP-violating asymmetries in neutral B decays to the pi+pi-CP eigenstate, and an updated measurement of the charge asymmetry in B0-->K+pi- decays. In a sample of 33 million Upsilon(4S)-->BBbar decays collected with the BABAR detector at the SLAC PEP-II asymmetric B factory, we find 65+12-11 pi+pi- and 217+\\/-18 K+pi- candidates and measure the asymmetry

B. Aubert; D. Boutigny; J.-M. Gaillard; A. Hicheur; Y. Karyotakis; J. P. Lees; P. Robbe; V. Tisserand; A. Palano; A. Pompili; G. P. Chen; J. C. Chen; N. D. Qi; G. Rong; P. Wang; Y. S. Zhu; G. Eigen; B. Stugu; G. S. Abrams; A. W. Borgland; A. B. Breon; D. N. Brown; J. Button-Shafer; R. N. Cahn; A. R. Clark; M. S. Gill; A. V. Gritsan; Y. Groysman; R. G. Jacobsen; R. W. Kadel; J. Kadyk; L. T. Kerth; Yu. G. Kolomensky; J. F. Kral; C. Leclerc; M. E. Levi; G. Lynch; P. J. Oddone; A. Perazzo; M. Pripstein; N. A. Roe; A. Romosan; M. T. Ronan; V. G. Shelkov; A. V. Telnov; W. A. Wenzel; P. G. Bright-Thomas; T. J. Harrison; C. M. Hawkes; D. J. Knowles; S. W. O'Neale; R. C. Penny; A. T. Watson; N. K. Watson; T. Deppermann; K. Goetzen; H. Koch; M. Kunze; B. Lewandowski; K. Peters; H. Schmuecker; M. Steinke; J. C. Andress; N. R. Barlow; W. Bhimji; N. Chevalier; P. J. Clark; W. N. Cottingham; N. Dyce; B. Foster; C. Mackay; D. Wallom; F. F. Wilson; K. Abe; C. Hearty; T. S. Mattison; J. A. McKenna; D. Thiessen; S. Jolly; A. K. McKemey; V. E. Blinov; A. D. Bukin; D. A. Bukin; A. R. Buzykaev; V. B. Golubev; V. N. Ivanchenko; A. A. Korol; E. A. Kravchenko; A. P. Onuchin; A. A. Salnikov; S. I. Serednyakov; Yu. I. Skovpen; V. I. Telnov; A. N. Yushkov; D. Best; M. Chao; A. J. Lankford; M. Mandelkern; S. McMahon; D. P. Stoker; K. Arisaka; C. Buchanan; S. Chun; D. B. Macfarlane; S. Prell; Sh. Rahatlou; G. Raven; V. Sharma; C. Campagnari; B. Dahmes; P. A. Hart; N. Kuznetsova; S. L. Levy; O. Long; A. Lu; J. D. Richman; W. Verkerke; M. Witherell; S. Yellin; J. Beringer; D. E. Dorfan; A. M. Eisner; A. A. Grillo; M. Grothe; C. A. Heusch; R. P. Johnson; W. S. Lockman; T. Pulliam; H. Sadrozinski; T. Schalk; R. E. Schmitz; B. A. Schumm; A. Seiden; M. Turri; W. Walkowiak; D. C. Williams; M. G. Wilson; E. Chen; G. P. Dubois-Felsmann; A. Dvoretskii; D. G. Hitlin; S. Metzler; J. Oyang; F. C. Porter; A. Ryd; A. Samuel; M. Weaver; S. Yang; R. Y. Zhu; S. Devmal; T. L. Geld; S. Jayatilleke; G. Mancinelli; B. T. Meadows; M. D. Sokoloff; T. Barillari; P. Bloom; M. O. Dima; S. Fahey; W. T. Ford; D. R. Johnson; U. Nauenberg; A. Olivas; P. Rankin; J. Roy; S. Sen; J. G. Smith; W. C. van Hoek; D. L. Wagner; J. Blouw; J. L. Harton; M. Krishnamurthy; A. Soffer; W. H. Toki; R. J. Wilson; J. Zhang; R. Aleksan; A. de Lesquen; S. Emery; A. Gaidot; S. F. Ganzhur; P.-F. Giraud; G. Hamel de Monchenault; W. Kozanecki; M. Langer; G. W. London; B. Mayer; B. Serfass; G. Vasseur; Ch. Yèche; M. Zito; T. Brandt; J. Brose; T. Colberg; M. Dickopp; R. S. Dubitzky; A. Hauke; E. Maly; R. Müller-Pfefferkorn; S. Otto; K. R. Schubert; R. Schwierz; B. Spaan; L. Wilden; D. Bernard; G. R. Bonneaud; F. Brochard; J. Cohen-Tanugi; S. Ferrag; E. Roussot; S. T'Jampens; Ch. Thiebaux; G. Vasileiadis; M. Verderi; A. Anjomshoaa; R. Bernet; A. Khan; D. Lavin; F. Muheim; S. Playfer; J. E. Swain; J. Tinslay; M. Falbo; C. Borean; C. Bozzi; S. Dittongo; L. Piemontese; E. Treadwell; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; D. Falciai; G. Finocchiaro; P. Patteri; I. M. Peruzzi; M. Piccolo; Y. Xie; A. Zallo; S. Bagnasco; A. Buzzo; R. Contri; G. Crosetti; M. Lo Vetere; M. Macri; M. R. Monge; S. Passaggio; F. C. Pastore; C. Patrignani; M. G. Pia; E. Robutti; A. Santroni; S. Tosi; M. Morii; R. Bartoldus; U. Mallik; J. Cochran; H. B. Crawley; P.-A. Fischer; J. Lamsa; W. T. Meyer; E. I. Rosenberg; G. Grosdidier; C. Hast; A. Höcker; H. M. Lacker; S. Laplace; V. Lepeltier; A. M. Lutz; S. Plaszczynski; M. H. Schune; S. Trincaz-Duvoid; G. Wormser; R. M. Bionta; V. Brigljevic; D. J. Lange; M. Mugge; K. van Bibber; D. M. Wright; M. Carroll; J. R. Fry; E. Gabathuler; R. Gamet; M. George; M. Kay; D. J. Payne; R. J. Sloane; C. Touramanis; M. L. Aspinwall; D. A. Bowerman; P. D. Dauncey; U. Egede; I. Eschrich; N. J. Gunawardane; J. A. Nash; P. Sanders; D. Smith; D. E. Azzopardi; J. J. Back; P. Dixon; P. F. Harrison; R. J. Potter; H. W. Shorthouse; P. Strother; P. B. Vidal; M. I. Williams; G. Cowan; S. George; M. G. Green; A. Kurup; C. E. Marker; P. McGrath; T. R. McMahon; S. Ricciardi; F. Salvatore; I. J. Scott; G. Vaitsas; C. L. Davis; J. Allison; R. J. Barlow; J. T. Boyd; A. C. Forti; J. Fullwood; F. Jackson; G. D. Lafferty; N. Savvas; E. T. Simopoulos; J. H. Weatherall; A. Farbin; A. Jawahery; V. Lillard; J. Olsen; D. A. Roberts; J. R. Schieck; G. Blaylock; C. Dallapiccola; K. T. Flood; S. S. Hertzbach; R. Kofler; V. G. Koptchev; T. B. Moore; H. Staengle; S. Willocq; B. Brau; R. Cowan; G. Sciolla; F. Taylor; R. K. Yamamoto; M. Milek; P. M. Patel; F. Palombo; J. M. Bauer; L. Cremaldi; V. Eschenburg; R. Kroeger; J. Reidy; D. A. Sanders; D. J. Summers; J. P. Martin; J. Y. Nief; R. Seitz; P. Taras; V. Zacek; H. Nicholson; C. S. Sutton; C. Cartaro; N. Cavallo; G. de Nardo; F. Fabozzi; C. Gatto; L. Lista; P. Paolucci; D. Piccolo

2002-01-01

79

Dispersive analysis of the new Belle {gamma}{gamma}{yields}{pi}{pi} results with chiral constraints  

SciTech Connect

We present an analysis of the recent high-statistics {gamma}{gamma}{yields}{pi}{pi} data from the Belle collaboration, based on the method of matching dispersive Muskhelishvili-Omnes type equations and chiral expansion formulas, extended beyond the region of {pi}{pi} elastic scattering. Chiral constraints which derive from the knowledge of all of the p{sup 4} and one of the relevant p{sup 6} coupling constants are implemented. Values of the pion dipole as well as quadrupole polarizabilities are deduced.

Garcia-Martin, R. [Departamento de Fisica Teorica II, Universidad Complutense de Madrid, E-28040 Madrid (Spain); Moussallam, B. [Groupe de Physique Theorique, Institut de Physique Nucleaire Universite Paris-Sud 11, F-91406 Orsay (France)

2011-05-23

80

Measurement of the dipion mass spectrum in X(3872)-> J\\/psi pi(+)pi(-) decays  

Microsoft Academic Search

We measure the dipion mass spectrum in X(3872) -> J\\/psi pi(+)pi(-) decays using 360 pb(-1) of (p) over barp collisions at root s = 1.96 TeV collected with the CDF II detector. The spectrum is fit with predictions for odd C-parity (S-3(1), P-1(1), and D-3(J)) charmonia decaying to J\\/psi pi(+)pi(-), as well as even C-parity states in which the pions

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. DAuria; M. Donofrio; D. Dagenhart; P. de Barbaro; S. De Cecco; A. Deisher; G. De Lentdecker; M. DellOrso; S. Demers; L. Demortier; J. Deng; M. Deninno; D. De Pedis; P. F. Derwent; C. Dionisi; J. R. Dittmann; P. DiTuro; C. Dorr; 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. G. Sciveres; A. F. Garfinkel; C. Gay; H. Gerberich; E. Gerchtein; D. Gerdes; S. Giagu; G. P. di Giovanni; P. Giannetti; A. Gibson; K. Gibson; C. Ginsburg; N. Giokaris; 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. Gonzalez; I. Gorelov; A. T. Goshaw; Y. Gotra; K. Goulianos; A. Gresele; M. Griffiths; S. Grinstein; C. Grosso-Pilcher; U. Grundler; J. G. 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. Lefevre; 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. Martinez; 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. M. Fernandez; J. Mulmenstadt; A. Mukherjee; M. Mulhearn; T. Muller; R. Mumford; P. Murat; J. Nachtman; S. Nahn; I. Nakano; A. Napier; D. Naumov; V. Necula; C. Neu; M. S. Neubauer; J. Nielsen

2006-01-01

81

Dispersion relations with crossing symmetry for {pi}{pi}D- and F1-wave amplitudes  

SciTech Connect

Results of implementation of dispersion relations with imposed crossing symmetry condition to description of {pi}{pi}D and F1 wave amplitudes are presented. We use relations with only one subtraction what leads to small uncertainties of results and to strong constraints for tested {pi}{pi} amplitudes. Presented equations are similar to those with one subtraction (so called GKPY equations) and to those with two subtractions (the Roy's equations) for the S and P waves. Numerical calculations are done with the S and P wave input amplitudes tested already with use of the Roy's and GKPY equations.

Kaminski, R. [Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, ul. Radzikowskiego 152, Krakow (Poland)

2011-05-23

82

Measurement of alpha / phi_2 from B to pi pi Decays  

SciTech Connect

The current results on B {yields} {pi}{pi} decays and SU(2) constraints on the Unitarity Triangle angle {alpha} or {phi}{sub 2} from the B-factories are summarized. Based on these measurements, predictions of the isospin analysis constraints at the end of the lifetime of both B-factories are given.

Bevan, A.J.

2007-01-17

83

Study of Dalitz plot in the decay {eta}' {yields} {eta}{pi}+{pi}-  

SciTech Connect

Dalitz plot of the {eta}' {yields} {eta}{pi}+{pi}- decay is studied using data collected in two different exclusive reactions. The world largest statistics made it possible to measure rather precisely the first term of an expansion of the matrix element squared and to determine other coefficients of the non-linear parameterization.

Khokhlov, Yu. [IHEP, 142281 Protvino (Russian Federation)

2006-02-11

84

The {pi}{sub 1}(1400) meson as a K{anti K}{pi}{pi} molecule  

SciTech Connect

In this paper the {pi}{sub 1}(1400) meson with J{sup PC} = 1{sup {minus}+} is speculated to be a molecule state which has a similar binding mechanism as the f{sub 1}(1420). With analogy to the f{sub 1}(1420) as a pion orbiting in a P-wave around an S-wave K{anti K} system, the authors have a pion orbiting in a P-wave around an S-wave K{anti K}{pi} system resonating in the {eta}(1295). In order to completely derive the dynamics one would have to develop a true four-body scattering mechanism with Born terms connecting two- and three-body isobar states ({eta}(1295), {rho}(770), a{sub 0}(98), K{sub 1}(1270)). Here they take a short cut and assume a simpler three-body Born term analogous to the final state rescattering mechanism that generated the f{sub 1}(1420). The interactions of the a{sub 0}(980) with the {rho}(770) through a kaon exchange, which would require a four-body treatment, are replaced by a modification of the P-wave {pi}{pi} phase shift. If they allow this modification then binding like the F{sub 1}(1420) can occur. Furthermore when the {eta}(1295) is formed in rescattering at momentum outside the K{anti K} {pi}{pi} phase space, they assume the {eta}(1295) will couple to the ground state {eta} since its quarks and quantum numbers are the same, thus creating {eta}{pi} in a P-wave decay.

Longacre, R.S.

1997-12-01

85

Determination of the S-Wave Pi Pi Scattering Lengths From a Study of K - to Pi - Pi0 Pi0 Decays  

SciTech Connect

We report the results from a study of the full sample of {approx}6.031 x 10{sup 7} K{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup 0}{pi}{sup 0} decays recorded by the NA48/2 experiment at the CERN SPS. As first observed in this experiment, the {pi}{sup 0}{pi}{sup 0} invariant mass (M{sub 00}) distribution shows a cusp-like anomaly in the region around M{sub 00} = 2m{sub +}, where m{sub +} is the charged pion mass. This anomaly has been interpreted as an effect due mainly to the final state charge exchange scattering process {pi}{sup +}{pi}{sup -} {yields} {pi}{sup 0}{pi}{sup 0} in K{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup +}{pi}{sup -} decay. Fits to the M{sub 00} distribution using two different theoretical formulations provide the presently most precise determination of a{sub 0} - a{sub 2}, the difference between the {pi}{pi} S-wave scattering lengths in the isospin I = 0 and I = 2 states. Higher-order {pi}{pi} rescattering terms, included in the two formulations, allow also an independent, though less precise, determination of a{sub 2}.

Batley, J.R.; Culling, A.J.; Kalmus, G.; /Cambridge U.; Lazzeroni, C.; /Cambridge U. /Birmingham U.; Munday, D.J.; /Cambridge U.; Slater, M.W.; /Cambridge U. /Birmingham U.; Wotton, S.A.; /Cambridge U.; Arcidiacono, R.; /CERN /Turin U. /INFN, Turin; Bocquet, G.; /CERN; Cabibbo, N.; /CERN /Rome U. /INFN, Rome; Ceccucci, A.; /CERN; Cundy, D.; /CERN /Turin, Cosmo-Geofisica Lab; Falaleev, V.; Fidecaro, M.; Gatignon, L.; Gonidec, A.; Kubischta, W.; /CERN; Norton, A.; /CERN /Ferrara U. /INFN, Ferrara; Maier, A.; Patel, M.; Peters, A.; /CERN /Dubna, JINR /Pisa, Scuola Normale Superiore /Dubna, JINR /Dubna, JINR /Birmingham U. /Dubna, JINR /CERN /Dubna, JINR /Dubna, JINR /Sofiya U. /Dubna, JINR /Dubna, JINR /Dubna, JINR /INFN, Perugia /Dubna, JINR /Dubna, JINR /Northwestern U. /Dubna, JINR /Chicago U., EFI /Marseille, CPPM /Chicago U., EFI /Edinburgh U. /George Mason U. /Edinburgh U. /Ferrara U. /INFN, Ferrara /Florence U. /INFN, Florence /Florence U. /INFN, Florence /Pisa, Scuola Normale Superiore /INFN, Florence /Modena U. /INFN, Florence /INFN, Florence /Urbino U. /INFN, Florence /Mainz U., Inst. Phys. /Bonn U. /Mainz U., Inst. Phys. /Northwestern U. /SLAC /Northwestern U. /Northwestern U. /Royal Holloway, U. of London /Northwestern U. /Northwestern U. /UCLA /Perugia U. /INFN, Perugia /Frascati /Perugia U. /INFN, Perugia /INFN, Perugia /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa U. /INFN, Pisa /Barcelona, IFAE /Pisa U. /INFN, Pisa /DSM, DAPNIA, Saclay /DSM, DAPNIA, Saclay /CERN /DSM, DAPNIA, Saclay /Siegen U. /INFN, Turin /Turin U. /INFN, Turin /Bern U. /Turin U. /INFN, Turin /CERN /Turin U. /INFN, Turin /Madrid, CIEMAT /Vienna, OAW

2012-03-29

86

I=2 pi-pi Scattering from Fully-Dynamical Mixed-Action Lattice QCD  

SciTech Connect

We compute the I=2 {pi}{pi} scattering length at pion masses of m{sub {pi}} = 294, 348 and 484 MeV in fully-dynamical lattice QCD using Luescher's finite-volume method. The calculation is performed with domain-wall valence-quark propagators on asqtad-improved MILC configurations with staggered sea quarks. Chiral perturbation theory is used to perform the extrapolation of the scattering length from lattice quark masses down to the physical value, and we find m{sub {pi}}a{sub 2} = -0.0426 {+-} 0.0006 {+-} 0.0003 {+-} 0.0018, in good agreement with experiment. The I = 2 {pi}{pi} scattering phase shift is calculated to be {delta} = -43 {+-} 10 {+-} 5 degrees at |p| {approx} 544 MeV for m{pi} {approx} 484 MeV.

Silas R. Beane; Paulo F. Bedaque; Kostas Orginos; Martin J. Savage

2005-06-11

87

Exclusive production of K+K-pi+pi- in photon-photon collisions  

Microsoft Academic Search

We report a measurement of the reaction gammagamma-->K+K-pi+pi- in both tagged and untagged events at PEP. The cross section rises with invariant gammagamma mass to about 15 nb at 2 GeV and falls slowly at higher masses. We find clear evidence for the processes gammagamma-->phipi+pi- and gammagamma-->K*0(892)Kpi. Upper limits (95% C.L.) of 1.5 and 5.7 nb in the mass range

H. Aihara; M. Alston-Garnjost; J. C. Armitage; J. A. Bakken; A. Barbaro-Galtieri; A. R. Barker; A. V. Barnes; B. A. Barnett; H.-U. Bengtsson; D. L. Bintinger; B. J. Blumenfeld; G. J. Bobbink; A. D. Bross; C. D. Buchanan; A. Buijs; M. P. Cain; D. O. Caldwell; O. Chamberlain; C.-Y. Chien; A. R. Clark; A. Cordier; O. I. Dahl; C. T. Day; K. A. Derby; M. A. van Driel; P. H. Eberhard; A. M. Eisner; F. C. Erné; D. L. Fancher; H. Fujii; T. Fujii; B. Gabioud; J. W. Gary; W. Gorn; N. J. Hadley; J. M. Hauptman; W. Hofmann; J. E. Huth; J. Hylen; U. P. Joshi; T. Kamae; H. S. Kaye; K. H. Kees; R. W. Kenney; L. T. Kerth; Winston Ko; R. I. Koda; R. R. Kofler; K. K. Kwong; R. L. Lander; W. G. Langeveld; J. G. Layter; F. L. Linde; C. S. Lindsey; S. C. Loken; A. Lu; X.-Q. Lu; G. R. Lynch; L. Madansky; R. J. Madaras; K. Maeshima; B. D. Magnuson; J. N. Marx; K. Maruyama; G. E. Masek; J. A. Matthews; S. O. Melnikoff; E. S. Miller; W. Moses; R. R. McNeil; P. Nemethy; D. R. Nygren; P. J. Oddone; H. P. Paar; D. A. Palmer; D. A. Park; D. E. Pellett; A. Pevsner; M. Pripstein; P. R. Robrish; M. T. Ronan; R. R. Ross; F. R. Rouse; R. R. Sauerwein; K. A. Schwitkis; J. C. Sens; G. Shapiro; M. D. Shapiro; B. C. Shen; W. E. Slater; J. R. Smith; M. L. Stevenson; D. H. Stork; M. K. Sullivan; J. R. Thompson; H. K. Ticho; J. Timmer; N. Toge; R. van Tyen; B. van Uitert; G. J. VanDalen; R. F. van Daalen Wetters; W. Vernon; W. Wagner; E. M. Wang; Y. X. Wang; M. R. Wayne; W. A. Wenzel; J. T. White; M. C. S. Williams; H. Yamamoto; M. Yamauchi; S. J. Yellin; W.-M. Zhang

1985-01-01

88

Dalitz plot analysis of the decay B0( Bmacr 0)-->K±pi-\\/+pi0  

Microsoft Academic Search

We report a Dalitz-plot analysis of the charmless hadronic decays of neutral B mesons to K±pi-\\/+pi0. With a sample of (231.8±2.6)×106Upsilon(4S)-->B Bmacr decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the magnitudes and phases of the intermediate resonant and nonresonant amplitudes for B0 and Bmacr 0 decays and determine the corresponding CP-averaged

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; T. J. Orimoto; 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; 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; T. Schalk; B. A. Schumm; A. Seiden; M. G. Wilson; L. O. Winstrom; E. Chen; C. H. Cheng; 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; J. Zhang; 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; F. Muheim; S. Playfer; A. I. Robertson; J. E. Watson; Y. Xie; 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; J. Wu; 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; 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; K. C. Schofield; 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; 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; F. Fabozzi; 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; 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

2008-01-01

89

Thermal behavior of {pi}-{pi} scattering lengths in the Nambu-Jona-Lasinio model  

SciTech Connect

We calculate the thermal evolution of {pi}-{pi} scattering lengths, in the framework of the Nambu-Jona-Lasinio model. The thermal corrections were calculated at the one-loop level using thermofield dynamics. We present also results for the pion thermal mass. Our procedure implies the modeling of a propagating scalar meson as a resumation of chains of quark bubbles, which is presented explicitly. We compare our results with previous analysis of this problem in the framework of different theoretical approaches.

Loewe, M.; Ruiz, Jorge A.; Rojas, J. C. [Facultad de Fisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile); Departamento de Fisica, Universidad Catolica del Norte, Angamos 0610, Antofagasta (Chile)

2008-11-01

90

Search for eta_c decays into pi pi and K Bar K  

Microsoft Academic Search

Using 58 million $J\\/\\\\psi$ events taken with the BESII detector, a search for\\u000a$eta_{c}$ CP violating decays into $\\\\pi\\\\pi$ and $\\\\bar{K}K$ has been performed.\\u000aNo clear $eta_{c}$ is observed, and upper limits for $B(eta_{c}->\\\\pi \\\\pi)$and\\u000a$B(eta_{c}->\\\\bar{K} K)$ are given at the 90% confidence level,\\u000a$B(J\\/\\\\psi->\\\\gamma\\\\eta_{c})\\\\times B(eta_{c}->\\\\pi^{+}\\\\pi^{-})<1.1\\\\times 10^{-5}$\\u000a, $B(J\\/\\\\psi->\\\\gamma\\\\eta_{c})\\\\times B(eta_{c}->\\\\pi^{0}\\\\pi^{0})<0.71\\\\times\\u000a10^{-5}$, $B(J\\/\\\\psi->\\\\gamma\\\\eta_{c})\\\\times B(eta_{c}->K^{+}K^{-})<0.96\\\\times\\u000a10^{-5}$ and $B(J\\/\\\\psi->\\\\gamma\\\\eta_{c})\\\\times\\u000aB(eta_{c}->{K_{s}}^{0}{K_{s}}^{0})<0.53\\\\times 10^{-5}$.

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

2005-01-01

91

Observation of CP violation in B(0) --> K(+)pi(-) and B(0) --> pi(+)pi(-).  

PubMed

We report observations of CP violation in the decays B(0) --> K(+)pi(-) and B(0) --> pi(+)pi(-) in a sample of 383 x 10(6) Upsilon(4S) --> BB[over] events. We find 4372+/-82 B(0) --> K(+)pi(-) decays and measure the direct CP-violating charge asymmetry A(Kpi) = -0.107+/-0.018(stat)(-0.004)(+0.007)(syst), which excludes the CP-conserving hypothesis with a significance of 5.5 standard deviations. In the same sample, we find 1139+/-49 B(0) --> pi(+)pi(-) decays and measure the CP-violating asymmetries S(pipi) = -0.60+/-0.11(stat)+/-0.03(syst) and C(pipi) = -0.21+/-0.09(stat)+/-0.02(syst). CP conservation in B(0) --> pi(+)pi(-) (S(pipi) = C(pipi) = 0) is excluded at a confidence level 1-C.L. = 8 x 10(-8), corresponding to 5.4 standard deviations. PMID:17678212

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A; Garra Tico, J; Grauges, E; Lopez, L; Palano, A; Eigen, G; Ofte, I; Stugu, B; Sun, L; Abrams, G S; Battaglia, M; Brown, D N; Button-Shafer, J; Cahn, R N; Groysman, Y; Jacobsen, R G; Kadyk, J A; Kerth, L T; Kolomensky, Yu G; Kukartsev, G; Lopes Pegna, D; Lynch, G; Mir, L M; Orimoto, T J; Pripstein, M; Roe, N A; Ronan, M T; Tackmann, K; Wenzel, W A; Del Amo Sanchez, P; Hawkes, C M; Watson, A T; Held, T; Koch, H; Lewandowski, B; Pelizaeus, M; Schroeder, T; Steinke, M; Cottingham, W N; Walker, D; Asgeirsson, D J; Cuhadar-Donszelmann, T; Fulsom, B G; Hearty, C; Knecht, N S; Mattison, T S; McKenna, J A; Khan, A; Saleem, M; Teodorescu, L; Blinov, V E; Bukin, A D; 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; Abachi, S; Buchanan, C; Foulkes, S D; Gary, J W; Liu, F; Long, O; Shen, B C; Zhang, L; Paar, H P; Rahatlou, S; Sharma, V; Berryhill, J W; Campagnari, C; Cunha, A; Dahmes, B; Hong, T M; Kovalskyi, D; Richman, J D; Beck, T W; Eisner, A M; Flacco, C J; Heusch, C A; Kroseberg, J; Lockman, W S; Schalk, T; Schumm, B A; Seiden, A; Williams, D C; Wilson, M G; Winstrom, L O; Chen, E; Cheng, C H; Dvoretskii, A; Fang, F; Hitlin, D G; Narsky, I; Piatenko, T; Porter, F C; Mancinelli, G; Meadows, B T; Mishra, K; Sokoloff, M D; Blanc, F; Bloom, P C; Chen, S; Ford, W T; Hirschauer, J F; Kreisel, A; Nagel, M; Nauenberg, U; Olivas, A; Smith, J G; Ulmer, K A; Wagner, S R; Zhang, J; Gabareen, A M; Soffer, A; Toki, W H; Wilson, R J; Winklmeier, F; Zeng, Q; Altenburg, D D; Feltresi, E; Hauke, A; Jasper, H; Merkel, J; Petzold, A; Spaan, B; Wacker, K; Brandt, T; Klose, V; Lacker, H M; Mader, W F; Nogowski, R; Schubert, J; Schubert, K R; Schwierz, R; Sundermann, J E; Volk, A; Bernard, D; Bonneaud, G R; Latour, E; Lombardo, V; Thiebaux, Ch; Verderi, M; Clark, P J; Gradl, W; Muheim, F; Playfer, S; Robertson, A I; Xie, Y; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cecchi, A; Cibinetto, G; Franchini, P; Luppi, E; Negrini, M; Petrella, A; Piemontese, L; Prencipe, E; Santoro, V; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Pacetti, S; Patteri, P; Peruzzi, I M; Piccolo, M; Rama, M; Zallo, A; Buzzo, A; Contri, R; Lo Vetere, M; Macri, M M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Chaisanguanthum, K S; Morii, M; Wu, J; Dubitzky, R S; Marks, J; Schenk, S; Uwer, U; Bard, D J; Dauncey, P D; Flack, R L; Nash, J A; Nikolich, M B; Panduro Vazquez, W; Behera, P K; Chai, X; Charles, M J; Mallik, U; Meyer, N T; Ziegler, V; Cochran, J; Crawley, H B; Dong, L; Eyges, V; Meyer, W T; Prell, S; Rosenberg, E I; Rubin, A E; Gritsan, A V; Guo, Z J; Lae, C K; Denig, A G; Fritsch, M; Schott, G; Arnaud, N; Béquilleux, J; Davier, M; Grosdidier, G; Höcker, A; Lepeltier, V; Le Diberder, F; Lutz, A M; Pruvot, S; Rodier, S; Roudeau, P; Schune, M H; Serrano, J; Sordini, V; Stocchi, A; Wang, W F; Wormser, G; Lange, D J; Wright, D M; Chavez, C A; Forster, I J; Fry, J R; Gabathuler, E; Gamet, R; Hutchcroft, D E; Payne, D J; Schofield, K C; Touramanis, C; Bevan, A J; George, K A; Di Lodovico, F; Menges, W; Sacco, R; Cowan, G; Flaecher, H U; Hopkins, D A; Jackson, P S; McMahon, T R; Salvatore, F; Wren, A C; Brown, D N; Davis, C L; Allison, J; Barlow, N R; Barlow, R J; Chia, Y M; Edgar, C L; Lafferty, G D; West, T J; Yi, J I; Anderson, J; Chen, C; Jawahery, A; Roberts, D A; Simi, G; Tuggle, J M; Blaylock, G; Dallapiccola, C; Hertzbach, S S; Li, X; Moore, T B; Salvati, E; Saremi, S; Cowan, R; Fisher, P H; Sciolla, G; Sekula, S J; Spitznagel, M; Taylor, F; Yamamoto, R K; McLachlin, S E; Patel, P M; Robertson, S H; Lazzaro, A; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Godang, R; Kroeger, R; Sanders, D A; Summers, D J; Zhao, H W; Brunet, S; Côté, D; Simard, M; Taras, P; Viaud, F B; Nicholson, H; De Nardo, G; Fabozzi, F; Lista, L; Monorchio, D; Sciacca, C; Baak, M A; Raven, G; Snoek, H L; Jessop, C P; Losecco, J M; Benelli, G; Corwin, L A; Gan, K K; Honscheid, K; Hufnagel, D; Kagan, H; Kass, R; Morris, J P; Rahimi, A M; Regensburger, J J; Ter-Antonyan, R; 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; Gagliardi, N; Gaz, A; Margoni, M; Morandin, M; Pompili, A; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Voci, C; Ben-Haim, E; Briand, H; Chauveau, J; David, P; Del Buono, L; de la Vaissière, Ch; Hamon, O; Hartfiel, B L; Leruste, Ph; Malclès, J; Ocariz, J; Perez, A; Gladney, L; Biasini, M; Covarelli, R; Manoni, E; Angelini, C; Batignani, G; Bettarini, S; Calderini, G; Carpinelli, M; Cenci, R; Cervelli, A; Forti, F

2007-07-12

92

pi -stacking interaction between carbon nanotubes and organic molecules  

Microsoft Academic Search

The pi -stacking interaction between various planar organic molecules is investigated within the framework of ab initio calculations. The adsorption of these molecules on the sidewall of the cylindrical carbon structure induces a small binding energy compared to conventional covalent functionalization. Such a weak interaction is found to be only physisorption and leads to minor and predictable modifications of the

F. Tournus; S. Latil; M. I. Heggie; J.-C. Charlier

2005-01-01

93

Edge-edge interactions in stacked graphene nanoplatelets  

SciTech Connect

High-resolution transmission electron microscopy (HRTEM) studies show the dynamics of small graphene platelets on larger graphene layers. The platelets move nearly freely to eventually lock in at well-defined positions close to the edges of the larger underlying graphene sheet. While such movement is driven by a shallow potential energy surface described by an interplane interaction, the lock-in position occurs by via edge-edge interactions of the platelet and the graphene surface located underneath. Here we quantitatively study this behavior using van der Waals density functional calculations. Local interactions at the open edges are found to dictate stacking configurations that are different from Bernal (AB) stacking. These stacking configurations are known to be otherwise absent in edge-free two-dimensional (2D) graphene. The results explain the experimentally observed platelet dynamics and provide a detailed account of the new electronic properties of these combined systems.

Cruz Silva, Eduardo [ORNL; Terrones Maldonado, Humberto [ORNL; Terrones Maldonado, Mauricio [ORNL; Jia, Xiaoting [Massachusetts Institute of Technology (MIT); Sumpter, Bobby G [ORNL; Dresselhaus, M [Massachusetts Institute of Technology (MIT); Meunier, V. [Rensselaer Polytechnic Institute (RPI)

2013-01-01

94

The double pi pi 5.6 helix of gramicidin A predominates in unsaturated lipid membranes.  

PubMed

The structure of the channel-forming polypeptide gramicidin A (GA) incorporated into phosphatidyl-choline (PC) liposomes has been studied as a function of the degree of unsaturation of the acyl chains of PC. The initial conformational state of GA in reconstituted bilayers is determined by the solvent in which the peptide and the lipid are initially co-dissolved, whereas the equilibrium conformational state (after heat incubation) is affected by the lipid structure rather than by the nature of the solvent. The conformational equilibrium of GA has been studied in liposomes prepared from PC having a variable number of double bonds in the fatty acid moiety, by circular dichroism and Fourier transform infrared. Liposomes were prepared from trifluoroethanol or ethanol solutions and incubated at 68 degrees C. GA was shown to retain the conformation of the right-handed pi-->6.3 pi<--6.3 helix in PC with saturated acyl chains and with one double bond, whereas in dilinoleoyl-PC, having two double bond in each chain, the thermodynamically preferred structures are left-handed antiparallel and parallel double pi pi 5.6 helices. Natural soybean PC also favours left-handed pi pi 5.6 helical structures of GA (approximately 75%). This finding is discussed in terms of the role of PC unsaturation in the dynamic properties of the lipid matrix. Differences between observed FTIR spectra of the increases decreases pi pi 5.6 helix in solution (and to a larger extent in the membrane) and the calculated IR spectra can be interpreted as resulting from deviation of the real structure from the theoretically derived ideal helix. The data obtained provide grounds for better understanding of a GA channel functioning in lipids of variable degrees of unsaturation. PMID:7504620

Sychev, S V; Barsukov, L I; Ivanov, V T

1993-01-01

95

Search for CP violation using Todd correlations in D0-->K+K-pi+pi- decays  

Microsoft Academic Search

We search for CP violation in a sample of 4.7×104 Cabibbo suppressed D0-->K+K-pi+pi- decays. We use 470fb-1 of data recorded by the BABAR detector at the PEP-II asymmetric-energy e+e- storage rings running at center-of-mass energies near 10.6 GeV. CP violation is searched for in the difference between the T-odd asymmetries, obtained using triple product correlations, measured for D0 and D¯0

P. Del Amo Sanchez; 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; 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; 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; 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; 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; A. Perez; 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. P. Coleman; 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; R. Cenci; 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; N. L. Blount; J. Brau; R. Frey; O. Igonkina; J. A. Kolb; R. Rahmat; N. B. Sinev; D. Strom; J. Strube; E. Torrence; G. Castelli; E. Feltresi; N. Gagliardi; M. Margoni; M. Morandin; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; E. Ben-Haim; G. R. Bonneaud; H. Briand; J. Chauveau; O. Hamon; Ph. Leruste; G. Marchiori; J. Ocariz; 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; 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; M. R. Convery; 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; 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; D. R. Muller; H. Neal; S. Nelson; C. P. O'Grady; I. Ofte; M. Perl; B. N. Ratcliff; A. Roodman; A. A. Salnikov; R. H. Schindler; J. Schwiening; A. Snyder; D. Su; M. K. Sullivan; K. Suzuki; J. M. Thompson; J. Va'Vra; A. P. Wagner

2010-01-01

96

Improved Measurements of CP-Violating Asymmetry Amplitudes in B0-->pi+pi- Decays  

Microsoft Academic Search

We present updated measurements of the CP-violating parameters Spipi and Cpipi in B0-->pi+pi- decays. Using a sample of 227×106 Upsilon(4S)-->B Bmacr decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC, we observe 467±33 signal decays and measure Spipi=-0.30±0.17(stat)±0.03(syst) and Cpipi=-0.09±0.15(stat)±0.04(syst).

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. R. 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

2005-01-01

97

Resonances in $J\\/\\\\psi \\\\to \\\\phi \\\\pi ^+\\\\pi ^-$ and $\\\\phi K^+K^-$  

Microsoft Academic Search

A partial wave analysis is presented of $J\\/\\\\psi \\\\to \\\\phi \\\\pi ^+\\\\pi ^-$ and\\u000a$\\\\phi K^+K^-$ from a sample of 58M $J\\/\\\\psi$ events in the BES II detector. The\\u000a$f_0(980)$ is observed clearly in both sets of data, and parameters of the\\u000aFlatt\\\\' e formula are determined accurately: $M = 965 \\\\pm 8$ (stat) $\\\\pm 6$\\u000a(syst) MeV\\/c$^2$, $g_1 =

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

2004-01-01

98

pi^+ - pi^0 mass difference and S parameter in the large N_f QCD  

Microsoft Academic Search

In the framework of the Schwinger-Dyson equation and the Bethe-Salpeter\\u000aequation in the improved ladder approximation, we calculate the S parameter and\\u000aan analogue of the \\\\pi^+ - \\\\pi^0 mass difference \\\\Delta m_\\\\pi^2 \\\\equiv\\u000am_{\\\\pi^+}^2 -m_{\\\\pi^0}^2 as well as the NG boson decay constant f_\\\\pi on the\\u000asame footing in the large N_f QCD, through the difference between the vector

Masayasu Harada; Masafumi Kurachi; Koichi Yamawaki

2005-01-01

99

Search for CP violation in the decays D0 --> K- K+ and D0 --> pi- pi+.  

PubMed

We measure time-integrated CP-violating asymmetries of neutral charmed mesons in the modes D0 --> K(-) K(+) and D0 --> pi(-) pi(+) with the highest precision to date by using D0 --> K(-) pi(+) decays to correct detector asymmetries. An analysis of 385.8 fb(-1) of data collected with the BABAR detector yields values of a(CP)(KK)=(0.00+/-0.34(stat)+/-0.13(syst))% and a(CP)(pipi)=(-0.24+/-0.52(stat)+/-0.22(syst))%, which agree with standard model predictions. PMID:18352456

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A; Garra Tico, J; Grauges, E; Lopez, L; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Abrams, G S; Battaglia, M; Brown, D N; Button-Shafer, J; Cahn, R N; Groysman, Y; Jacobsen, R G; Kadyk, J A; Kerth, L T; Kolomensky, Yu G; Kukartsev, G; Lopes Pegna, D; Lynch, G; Mir, L M; Orimoto, T J; Osipenkov, I L; Ronan, M T; Tackmann, K; Tanabe, T; Wenzel, W A; Del Amo Sanchez, P; Hawkes, C M; Watson, A T; Koch, H; Schroeder, T; Walker, D; Asgeirsson, D J; Cuhadar-Donszelmann, T; Fulsom, B G; Hearty, C; Mattison, T S; McKenna, J A; Barrett, M; Khan, A; Saleem, M; Teodorescu, L; Blinov, V E; Bukin, A D; 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; Abachi, S; Buchanan, C; Foulkes, S D; Gary, J W; Liu, F; Long, O; Shen, B C; Vitug, G M; Zhang, L; Paar, H P; Rahatlou, S; Sharma, V; Berryhill, J W; Campagnari, C; Cunha, A; Dahmes, B; Hong, T M; Kovalskyi, D; Richman, J D; Beck, T W; Eisner, A M; Flacco, C J; Heusch, C A; Kroseberg, J; Lockman, W S; Schalk, T; Schumm, B A; Seiden, A; Wilson, M G; Winstrom, L O; Chen, E; Cheng, C H; Fang, F; Hitlin, D G; Narsky, I; Piatenko, T; Porter, F C; Andreassen, R; Mancinelli, G; Meadows, B T; Mishra, K; Sokoloff, M D; Blanc, F; Bloom, P C; Chen, S; Ford, W T; Hirschauer, J F; Kreisel, A; Nagel, M; Nauenberg, U; Olivas, A; Smith, J G; Ulmer, K A; Wagner, S R; Zhang, J; Gabareen, A M; Soffer, A; Toki, W H; Wilson, R J; Winklmeier, F; Altenburg, D D; Feltresi, E; Hauke, A; Jasper, H; Merkel, J; Petzold, A; Spaan, B; Wacker, K; Klose, V; Kobel, M J; Lacker, H M; Mader, W F; Nogowski, R; Schubert, J; Schubert, K R; Schwierz, R; Sundermann, J E; Volk, A; Bernard, D; Bonneaud, G R; Latour, E; Lombardo, V; Thiebaux, Ch; Verderi, M; Clark, P J; Gradl, W; Muheim, F; Playfer, S; Robertson, A I; Watson, J E; Xie, Y; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cecchi, A; Cibinetto, G; Franchini, P; Luppi, E; Negrini, M; Petrella, A; Piemontese, L; Prencipe, E; Santoro, V; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; de Sangro, R; Finocchiaro, G; Pacetti, S; Patteri, P; Peruzzi, I M; Piccolo, M; Rama, M; Zallo, A; Buzzo, A; Contri, R; Lo Vetere, M; Macri, M M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Chaisanguanthum, K S; Morii, M; Wu, J; Dubitzky, R S; Marks, J; Schenk, S; Uwer, U; Bard, D J; Dauncey, P D; Flack, R L; Nash, J A; Panduro Vazquez, W; Tibbetts, M; Behera, P K; Chai, X; 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; Lae, C K; Denig, A G; Fritsch, M; Schott, G; Arnaud, N; Béquilleux, J; D'Orazio, A; Davier, M; Grosdidier, G; Höcker, A; Lepeltier, V; Le Diberder, F; Lutz, A M; Pruvot, S; Rodier, S; Roudeau, P; Schune, M H; Serrano, J; Sordini, V; Stocchi, A; Wang, W F; 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; Schofield, K C; Touramanis, C; Bevan, A J; George, K A; Di Lodovico, F; Sacco, R; Cowan, G; Flaecher, H U; Hopkins, D A; Paramesvaran, S; Salvatore, F; Wren, A C; Brown, D N; Davis, C L; Allison, J; Bailey, D; Barlow, N R; Barlow, R J; Chia, Y M; Edgar, C L; Lafferty, G D; West, T J; Yi, J I; Anderson, J; Chen, C; Jawahery, A; Roberts, D A; Simi, G; Tuggle, J M; Blaylock, G; Dallapiccola, C; Hertzbach, S S; Li, X; Moore, T B; Salvati, E; Saremi, S; Cowan, R; Dujmic, D; Fisher, P H; Koeneke, K; Sciolla, G; Spitznagel, M; Taylor, F; Yamamoto, R K; Zhao, M; Zheng, Y; McLachlin, S E; Patel, P M; Robertson, S H; Lazzaro, A; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Godang, R; Kroeger, R; Sanders, D A; Summers, D J; Zhao, H W; Brunet, S; Côté, D; Simard, M; Taras, P; Viaud, F B; Nicholson, H; De Nardo, G; Fabozzi, F; Lista, L; Monorchio, D; Sciacca, C; Baak, M A; Raven, G; Snoek, H L; Jessop, C P; Knoepfel, K J; Losecco, J M; Benelli, G; Corwin, L A; Honscheid, K; Kagan, H; Kass, R; Morris, J P; Rahimi, A M; Regensburger, J J; 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; Gagliardi, N; Gaz, A; Margoni, M; Morandin, M; Pompili, A; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Voci, C; Ben-Haim, E; Briand, H; Calderini, G; Chauveau, J; David, P; Del Buono, L; de la Vaissière, Ch; Hamon, O; Leruste, Ph; Malclès, J; Ocariz, J; Perez, A; Prendki, J; Gladney, L; Biasini, M; Covarelli, R; Manoni, E; Angelini, C; Batignani, G; Bettarini, S; Carpinelli, M; Cenci, R; Cervelli, A; Forti, F; Giorgi, M A; Lusiani, A; Marchiori, G

2008-02-15

100

Improved measurements of CP-violating asymmetry amplitudes in B0-->pi+pi- decays.  

PubMed

We present updated measurements of the CP-violating parameters Spipi and Cpipi in B0-->pi+pi- decays. Using a sample of 227x10(6) Upsilon(4S)-->BB decays collected with the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC, we observe 467+/-33 signal decays and measure Spipi=-0.30+/-0.17(stat)+/-0.03(syst) and Cpipi=-0.09+/-0.15(stat)+/-0.04(syst). PMID:16241716

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

2005-10-04

101

Asymmetry observables in e{sup +}e{sup -{yields}{pi}+{pi}-{gamma}} in the {phi} region within a chiral unitary approach  

SciTech Connect

We make a theoretical study of the charge and forward-backward pion asymmetries in the e{sup +}e{sup -{yields}{pi}+{pi}-{gamma}} process on and off the {phi} resonance energy. These observables are rather sensitive to the inner details of the theoretical models to describe the reaction. In addition to the standard implementation of the initial state radiation and the bremsstrahlung contribution to the final state radiation, we use the techniques of the chiral unitary approach to evaluate the contribution from the mechanisms of {phi} decay into {pi}{sup +{pi}-{gamma}}. This contribution involves the implementation of final state interaction from direct chiral loops, the exchange of vector and axial-vector resonances and the final state interaction through the consideration of the meson-meson unitarized amplitudes, which were found important in a previous work describing the {phi}{yields}{pi}{pi}{gamma}. We find a good reproduction of the experimental data from KLOE for the forward-backward asymmetry, both at the {phi} peak and away from it. We also make predictions for the angular distributions of the charge asymmetry and show that this observable is very sensitive to the chiral loops involved in {phi} radiative decay.

Roca, L.; Oset, E. [Departamento de Fisica, Universidad de Murcia, E-30071, Murcia (Spain); Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Institutos de Investigacion de Paterna, Apartado 22085, 46071 Valencia (Spain)

2010-01-01

102

Two-Body Effective-Mass Spectra in the Products of the Reaction gamma+p-->p+pi++pi- and the sigma Resonance  

Microsoft Academic Search

By means of spark chambers and counters we measured the (pi+, pi-) and (pi+\\/-, p) invariant-mass spectra obtained from the products of the reaction gamma+p-->p+pi++pi-. They are in disagreement with the Cutkosky-Zachariasen model which takes into account the effect of the 32, 32 nucleon isobar. To fit our data we introduce a pi-pi final-state enhancement factor with resonant behavior. The

R. del Fabbro; M. de Pretis; R. Jones; G. Marini; A. Odian; G. Stoppini; L. Tau

1965-01-01

103

Interactive histology of large-scale biomedical image stacks.  

PubMed

Histology is the study of the structure of biological tissue using microscopy techniques. As digital imaging technology advances, high resolution microscopy of large tissue volumes is becoming feasible; however, new interactive tools are needed to explore and analyze the enormous datasets. In this paper we present a visualization framework that specifically targets interactive examination of arbitrarily large image stacks. Our framework is built upon two core techniques: display-aware processing and GPU-accelerated texture compression. With display-aware processing, only the currently visible image tiles are fetched and aligned on-the-fly, reducing memory bandwidth and minimizing the need for time-consuming global pre-processing. Our novel texture compression scheme for GPUs is tailored for quick browsing of image stacks. We evaluate the usability of our viewer for two histology applications: digital pathology and visualization of neural structure at nanoscale-resolution in serial electron micrographs. PMID:20975179

Jeong, Won-Ki; Schneider, Jens; Turney, Stephen G; Faulkner-Jones, Beverly E; Meyer, Dominik; Westermann, Rüdiger; Reid, R Clay; Lichtman, Jeff; Pfister, Hanspeter

104

Atomic-scale details of dislocation - stacking fault tetrahedra interaction.  

SciTech Connect

Stacking fault tetrahedra (SFTs) are formed during irradiation of fcc. metals and alloys with low stacking fault energy. The high number density of SFTs observed suggests that they should contribute to radiation-induced hardening and, therefore, be taken into account when estimating mechanical property changes of irradiated materials. The key issue is to describe the interaction between a moving dislocation and an individual SFT, which is characterized by a small physical scale of about 100 nm. In this paper we present results of an atomistic simulation of edge and screw dislocations interacting with small SFTs at different temperatures and strain rates and present mechanisms which can explain the formation of defect-free channels observed experimentally.

Osetskiy, Yury N [ORNL; Stoller, Roger E [ORNL; Rodney, David [Genie Physique et Mecanique des Materiaux; Bacon, David J [University of Liverpool

2005-01-01

105

Study of B0 --> J\\/psiK(*)0pi+pi- Decays with the Collider Detector at Fermilab  

Microsoft Academic Search

We report a study of the decays B0-->J\\/psiK(*)0pi+pi-, which involve the creation of a uubar or ddbar quark pair in addition to a bbar-->cbar(csbar) decay. The data sample consists of 110 pb-1 of ppbar collisions at (s) = 1.8 TeV collected by the CDF detector at the Fermilab Tevatron collider during 1992-1995. We measure the branching fractions to be B(B0-->J\\/psiK*0pi+pi-)

T. Affolder; H. Akimoto; A. Akopian; M. G. Albrow; P. Amaral; D. Amidei; K. Anikeev; J. Antos; G. Apollinari; T. Arisawa; A. Artikov; T. Asakawa; W. Ashmanskas; F. Azfar; P. Azzi-Bacchetta; N. Bacchetta; H. Bachacou; S. Bailey; P. de Barbaro; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; S. Baroiant; M. Barone; G. Bauer; F. Bedeschi; S. Belforte; W. H. Bell; G. Bellettini; J. Bellinger; D. Benjamin; J. Bensinger; A. Beretvas; J. P. Berge; J. Berryhill; A. Bhatti; M. Binkley; D. Bisello; M. Bishai; R. E. Blair; C. Blocker; K. Bloom; B. Blumenfeld; S. R. Blusk; A. Bocci; A. Bodek; W. Bokhari; G. Bolla; Y. Bonushkin; D. Bortoletto; J. Boudreau; A. Brandl; S. van den Brink; C. Bromberg; M. Brozovic; E. Brubaker; N. Bruner; E. Buckley-Geer; J. Budagov; H. S. Budd; K. Burkett; G. Busetto; A. Byon-Wagner; K. L. Byrum; S. Cabrera; P. Calafiura; M. Campbell; W. Carithers; J. Carlson; D. Carlsmith; W. Caskey; A. Castro; D. Cauz; A. Cerri; A. W. Chan; P. S. Chang; P. T. Chang; J. Chapman; C. Chen; Y. C. Chen; M.-T. Cheng; M. Chertok; G. Chiarelli; I. Chirikov-Zorin; G. Chlachidze; F. Chlebana; L. Christofek; M. L. Chu; Y. S. Chung; C. I. Ciobanu; A. G. Clark; A. P. Colijn; A. Connolly; J. Conway; M. Cordelli; J. Cranshaw; R. Cropp; R. Culbertson; D. Dagenhart; S. D'Auria; F. Dejongh; S. dell'Agnello; M. dell'Orso; L. Demortier; M. Deninno; P. F. Derwent; T. Devlin; J. R. Dittmann; A. Dominguez; S. Donati; J. Done; M. D'Onofrio; T. Dorigo; N. Eddy; K. Einsweiler; J. E. Elias; E. Engels; R. Erbacher; D. Errede; S. Errede; Q. Fan; H.-C. Fang; R. G. Feild; J. P. Fernandez; C. Ferretti; R. D. Field; I. Fiori; B. Flaugher; G. W. Foster; M. Franklin; J. Freeman; J. Friedman; Y. Fukui; I. Furic; S. Galeotti; A. Gallas; M. Gallinaro; T. Gao; M. Garcia-Sciveres; A. F. Garfinkel; P. Gatti; C. Gay; D. W. Gerdes; P. Giannetti; P. Giromini; V. Glagolev; D. Glenzinski; M. Gold; J. Goldstein; I. Gorelov; A. T. Goshaw; Y. Gotra; K. Goulianos; C. Green; G. Grim; P. Gris; L. Groer; C. Grosso-Pilcher; M. Guenther; G. Guillian; J. Guimaraes da Costa; R. M. Haas; C. Haber; S. R. Hahn; C. Hall; T. Handa; R. Handler; W. Hao; F. Happacher; K. Hara; A. D. Hardman; R. M. Harris; F. Hartmann; K. Hatakeyama; J. Hauser; J. Heinrich; A. Heiss; M. Herndon; C. Hill; K. D. Hoffman; C. Holck; R. Hollebeek; L. Holloway; B. T. Huffman; R. Hughes; J. Huston; J. Huth; H. Ikeda; J. Incandela; G. Introzzi; J. Iwai; Y. Iwata; E. James; M. Jones; U. Joshi; H. Kambara; T. Kamon; T. Kaneko; K. Karr; H. Kasha; Y. Kato; T. A. Keaffaber; K. Kelley; M. Kelly; R. D. Kennedy; R. Kephart; D. Khazins; T. Kikuchi; B. Kilminster; B. J. Kim; D. H. Kim; H. S. Kim; M. J. Kim; S. B. Kim; S. H. Kim; Y. K. Kim; M. Kirby; M. Kirk; L. Kirsch; S. Klimenko; P. Koehn; K. Kondo; J. Konigsberg; A. Korn; A. Korytov; E. Kovacs; J. Kroll; M. Kruse; S. E. Kuhlmann; K. Kurino; T. Kuwabara; A. T. Laasanen; N. Lai; S. Lami; S. Lammel; J. Lancaster; M. Lancaster; R. Lander; A. Lath; G. Latino; T. Lecompte; A. M. Lee; K. Lee; S. Leone; J. D. Lewis; M. Lindgren; T. M. Liss; J. B. Liu; Y. C. Liu; D. O. Litvintsev; O. Lobban; N. Lockyer; J. Loken; M. Loreti; D. Lucchesi; P. Lukens; S. Lusin; L. Lyons; J. Lys; R. Madrak; K. Maeshima; P. Maksimovic; L. Malferrari; M. Mangano; M. Mariotti; G. Martignon; A. Martin; J. A. Matthews; J. Mayer; P. Mazzanti; K. S. McFarland; P. McIntyre; E. McKigney; M. Menguzzato; A. Menzione; P. Merkel; C. Mesropian; A. Meyer; T. Miao; R. Miller; J. S. Miller; H. Minato; S. Miscetti; M. Mishina; G. Mitselmakher; N. Moggi; E. Moore; R. Moore; Y. Morita; T. Moulik; M. Mulhearn; A. Mukherjee; T. Muller; A. Munar; P. Murat; S. Murgia; J. Nachtman; V. Nagaslaev; S. Nahn; H. Nakada; I. Nakano; C. Nelson; T. Nelson; C. Neu; D. Neuberger; C. Newman-Holmes; C.-Y. P. Ngan; H. Niu; L. Nodulman; A. Nomerotski; S. H. Oh; Y. D. Oh; T. Ohmoto; T. Ohsugi; R. Oishi; T. Okusawa; J. Olsen; W. Orejudos; C. Pagliarone; F. Palmonari; R. Paoletti; V. Papadimitriou; D. Partos; J. Patrick; G. Pauletta; M. Paulini; C. Paus; D. Pellett; L. Pescara; T. J. Phillips; G. Piacentino; K. T. Pitts; A. Pompos; L. Pondrom; G. Pope; M. Popovic; F. Prokoshin; J. Proudfoot; F. Ptohos; O. Pukhov; G. Punzi; A. Rakitine; F. Ratnikov; D. Reher; A. Reichold; A. Ribon; W. Riegler; F. Rimondi; L. Ristori; M. Riveline; W. J. Robertson; A. Robinson; T. Rodrigo; S. Rolli; L. Rosenson; R. Roser; R. Rossin; C. Rott; A. Roy; A. Ruiz; A. Safonov; R. St. Denis; W. K. Sakumoto; D. Saltzberg; C. Sanchez; A. Sansoni; L. Santi; H. Sato; P. Savard; P. Schlabach; E. E. Schmidt; M. P. Schmidt; M. Schmitt; L. Scodellaro; A. Scott; A. Scribano; S. Segler; S. Seidel; Y. Seiya; A. Semenov; F. Semeria; T. Shah; M. D. Shapiro; P. F. Shepard; T. Shibayama; M. Shimojima; M. Shochet; A. Sidoti; J. Siegrist; A. Sill; P. Sinervo; P. Singh; A. J. Slaughter; K. Sliwa; C. Smith; F. D. Snider; A. Solodsky; J. Spalding; T. Speer

2002-01-01

106

Search for the highly suppressed decays B>K+pi-pi- and B>K-K-pi+  

Microsoft Academic Search

We report a search for the decays B--->K+pi-pi- and B--->K-K-pi+, which are highly suppressed in the standard model. Using a sample of (467±5)×106 B Bmacr pairs collected with the BABAR detector, we do not see any evidence of these decays and determine 90% confidence level upper limits of B(B--->K+pi-pi-)<9.5×10-7 and B(B--->K-K-pi+)<1.6×10-7 on the corresponding branching fractions, including systematic uncertainties.

B. Aubert; M. Bona; Y. Karyotakis; J. P. Lees; V. Poireau; E. Prencipe; X. Prudent; V. Tisserand; 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; R. N. Cahn; R. G. Jacobsen; L. T. Kerth; Yu. G. Kolomensky; G. Lynch; I. L. Osipenkov; M. T. Ronan; K. Tackmann; T. Tanabe; C. M. Hawkes; N. Soni; A. T. Watson; H. Koch; T. Schroeder; D. Walker; D. J. Asgeirsson; B. G. Fulsom; C. Hearty; T. S. Mattison; J. A. McKenna; M. Barrett; A. Khan; 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; Z. Yasin; L. Zhang; V. Sharma; C. Campagnari; T. M. Hong; D. Kovalskyi; M. A. Mazur; J. D. Richman; T. W. Beck; A. M. Eisner; C. J. Flacco; C. A. Heusch; J. Kroseberg; W. S. Lockman; A. J. Martinez; T. Schalk; B. A. Schumm; A. Seiden; M. G. Wilson; L. O. Winstrom; 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; P. C. Bloom; W. T. Ford; A. Gaz; J. F. Hirschauer; M. Nagel; U. Nauenberg; J. G. Smith; K. A. Ulmer; S. R. Wagner; R. Ayad; A. Soffer; W. H. Toki; R. J. Wilson; D. D. Altenburg; E. Feltresi; A. Hauke; H. Jasper; M. Karbach; J. Merkel; A. Petzold; B. Spaan; K. Wacker; M. J. Kobel; W. F. Mader; R. Nogowski; K. R. Schubert; R. Schwierz; A. Volk; D. Bernard; G. R. Bonneaud; E. Latour; M. Verderi; P. J. Clark; S. Playfer; 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; 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; 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; A. Adametz; J. Marks; S. Schenk; U. Uwer; V. Klose; H. M. Lacker; D. J. Bard; P. D. Dauncey; J. A. Nash; M. Tibbetts; P. K. Behera; X. Chai; M. J. Charles; U. Mallik; 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; C. K. Lae; 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; 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; K. A. George; F. di Lodovico; R. Sacco; M. Sigamani; G. Cowan; H. U. Flaecher; D. A. Hopkins; S. Paramesvaran; F. Salvatore; A. C. Wren; C. L. Davis; A. G. Denig; M. Fritsch; W. Gradl; G. Schott; K. E. Alwyn; D. Bailey; R. J. Barlow; Y. M. Chia; C. L. Edgar; 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; X. Li; E. Salvati; S. Saremi; R. Cowan; D. Dujmic; P. H. Fisher; G. Sciolla; M. Spitznagel; F. Taylor; R. K. Yamamoto; M. Zhao; P. M. Patel; S. H. Robertson; A. Lazzaro; V. Lombardo; F. Palombo; J. M. Bauer; L. Cremaldi; R. Godang; R. Kroeger; D. A. Sanders; D. J. Summers; H. W. Zhao; M. Simard; P. Taras; F. B. Viaud; 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; 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; M. Margoni; M. Morandin; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; C. Voci; P. Del Amo Sanchez; E. Ben-Haim; H. Briand; G. Calderini; J. Chauveau; P. David; L. Del Buono; O. Hamon; Ph. Leruste; J. Ocariz; A. Perez; J. Prendki; S. Sitt; L. Gladney; M. Biasini; R. Covarelli; E. Manoni; C. Angelini; G. Batignani; S. Bettarini; M. Carpinelli; A. Cervelli; F. Forti; M. A. Giorgi; A. Lusiani; G. Marchiori; 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; D. Del Re; E. di Marco; R. Faccini; F. Ferrarotto; F. Ferroni; M. Gaspero; P. D. Jackson; L. Li Gioi; M. A. Mazzoni; S. Morganti; G. Piredda; F. Polci; F. Renga; C. Voena; M. Ebert; T. Hartmann; H. Schröder; R. Waldi; T. Adye; B. Franek

2008-01-01

107

Phase shift of isospin-2 {pi}{pi} scattering from lattice QCD  

SciTech Connect

Finite-volume lattice QCD calculations offer the possibility of extracting resonance parameters from the energy-dependent elastic phase-shift computed using the Luescher technique. In this letter, as a trial of the method, we report on the extraction of the nonresonant phase-shift for S and D-wave {pi}{pi} isospin-2 scattering from dynamical lattice QCD computations. We define a variational basis of operators resembling pairs of pions of definite relative momentum and extract a spectrum of excited states that maps to phase-shifts at a set of discrete scattering momenta. Computations are performed with pion masses between 400 and 520 MeV on multiple spatial volumes. We observe no significant quark mass dependence in the phase-shifts extracted which are in reasonable agreement with the available experimental data at low momentum.

Dudek, Jozef J. [Jefferson Laboratory, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States); Department of Physics, Old Dominion University, Norfolk, Virginia 23529 (United States); Edwards, Robert G.; Richards, David G.; Thomas, Christopher E. [Jefferson Laboratory, 12000 Jefferson Avenue, Newport News, Virginia 23606 (United States); Peardon, Michael J. [School of Mathematics, Trinity College, Dublin 2 (Ireland)

2011-04-01

108

The phase-shift of isospin-2 pi-pi scattering from lattice QCD  

SciTech Connect

Finite-volume lattice QCD calculations offer the possibility of extracting resonance parameters from the energy-dependent elastic phase-shift computed using the L\\"uscher technique. In this letter, as a trial of the method, we report on the extraction of the non-resonant phase-shift for $S$ and $D$-wave $\\pi\\pi$ isospin-2 scattering from dynamical lattice QCD computations. We define a variational basis of operators resembling pairs of pions of definite relative momentum and extract a spectrum of excited states that maps to phase-shifts at a set of discrete scattering momenta. Computations are performed with pion masses between $400$ and $520$ MeV on multiple spatial volumes. We observe no significant quark mass dependence in the phase-shifts extracted which are in reasonable agreement with the available experimental data at low momentum.

Jozef J. Dudek, Robert G. Edwards, Michael J. Peardon, David G. Richards, Christopher E. Thomas

2011-04-01

109

Measurement of Branching Fractions and Mass Spectra of B to K pi pi gamma  

SciTech Connect

The authors present a measurement of the partial branching fractions and mass spectra of the exclusive radiative penguin processes B {yields} K{pi}{pi}{gamma} in the range m{sub K{pi}{pi}} < 1.8 GeV/c{sup 2}. They reconstruct four final states: K{sup +}{pi}{sup -}{pi}{sup +}{gamma}, K{sup +}{pi}{sup -}{pi}{sup 0}{gamma}, K{sub S}{sup 0}{pi}{sup -}{pi}{sup +}{gamma}, and K{sub S}{sup 0}{pi}{sup +}{pi}{sup 0}{gamma}, where K{sub S}{sup 0} {yields} {pi}{sup +}{pi}{sup -}. Using 232 million e{sup +}e{sup -} {yields} B{bar B} events recorded by the BABAR experiment at the PEP-II asymmetric-energy storage ring, they measure the branching fractions {Beta}(B{sup +} {yields} K{sup +}{pi}{sup -}{pi}{sup +}{gamma}) = (2.95 {+-} 0.13(stat.) {+-} 0.20(syst)) x 10{sup -5}, {Beta}(B{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0}{gamma}) = (4.07 {+-} 0.22(stat.) {+-} 0.31(syst.)) x 10{sup -5}, {Beta}(B{sup 0} {yields} K{sup 0}{pi}{sup +}{pi}{sup -}{gamma}) = (1.85 {+-} 0.21(stat.) {+-} 0.12(syst.)) x 10{sup -5}, and {Beta}(B{sup +} {yields} K{sup 0}{pi}{sup +}{pi}{sup 0}{gamma}) = (4.56 {+-} 0.42(stat.) {+-} 0.31(syst.)) x 10{sup -5}.

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 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. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /Harvard U. /Heidelberg U. /Imperial Coll., London /Iowa U. /Iowa State 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. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /Paris U., VI-VII /Pennsylvania U. /Perugia U. /INFN, Perugia /Pisa U. /Pisa, Scuola Normale Superiore /INFN, Pisa /Prairie View A-M /Princeton U. /Rome U. /INFN, Rome /Rostock U. /Rutherford /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. /INFN, Trieste /Valencia U., IFIC /Vanderbilt U. /Victoria U. /Warwick U. /Wisconsin U., Madison /Yale U.

2005-07-12

110

Dalitz Plot Analysis of B{sup -{yields}}D{sup +{pi}-{pi}-}  

SciTech Connect

We present a Dalitz plot analysis of B{sup -{yields}}D{sup +{pi}-{pi}-} decays, based on a sample of about 383 million {Upsilon}(4S){yields}BB-bar decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The analysis has been published previously in [1]. We measure the inclusive branching fraction of the three-body decay to be B(B{sup -{yields}}D{sup +{pi}+{pi}-}) = (1.08{+-}0.03(stat){+-}0.05(syst))x10{sup -3}. We observe the established D{sub 2}*{sup 0} and confirm the existence of D{sub 0}*{sup 0} in their decays to D{sup +{pi}-}, where the D{sub 2}*{sup 0} and D{sub 0}*{sup 0} are the 2{sup +} and 0{sup +} cu-bar P-wave states, respectively. We measure the masses and widths of D{sub 2}*{sup 0} and {Gamma}D{sub 0}*{sup 0} to be: mD{sub 2}* = (2460.4{+-}1.2{+-}1.2{+-}1.9) MeV/c{sup 2}, {Gamma}D{sub 2}* = (41.8{+-}2.5{+-}2.1{+-}2.0) MeV, mD{sub 0}* = (2297{+-}8{+-}5{+-}19) MeV/c{sup 2}, {Gamma}D{sub 0}* = (273{+-}12{+-}17{+-}45) MeV. The stated errors reflect the statistical and systematic uncertainties, and the uncertainty related to the assumed composition of signal events and the theoretical model.

Karbach, T. M. [Technische Universitaet Dortmund (Germany)

2010-08-05

111

Observation of CP Violation in B0 to K+pi- and B0 to pi+pi-  

SciTech Connect

The authors report observations of CP violation in the decays B{sup 0} {yields} K{sup +}{pi}{sup -} and B{sup 0} {yields} {pi}{sup +}{pi}{sup -} in a sample of 383 million {Upsilon}(4S) {yields} B{bar B} events. They find 4372 {+-} 82 B{sup 0} {yields} K{sup +}{pi}{sup -} decays and measure the direct Cp-violating charge asymmetry {Alpha}{sub K{pi}} = -0.107 {+-} 0.018(stat){sub -0.004}{sup +0.007}(syst), which excludes the CP-conserving hypothesis with a significance of 5.5 standard deviations. In the same sample they find 1139 {+-} 49 B{sup 0} {yields} {pi}{sup +}{pi}{sup -} decays and measure the CP-violating asymmetries S{sub {pi}{pi}} = -0.60 {+-} 0.11(stat) {+-} 0.03(syst) and C{sub {pi}{pi}} = -0.21 {+-} 0.09(stat) {+-} 0.02(syst). CP conservation in B{sup 0} {yields} {pi}{sup +}{pi}{sup -} (S{sub {pi}{pi}} = C{sub {pi}{pi}} = 0) is excluded at a confidence level 1-C.L. = 8 x 10{sup -8}, corresponding to 5.4 standard deviations.

Aubert, B.

2007-03-14

112

Measurement of CP Asymmetries and Branching Fractions in B to pi pi and B to K pi Decays.  

SciTech Connect

The authors present preliminary measurements of the Cp asymmetries and branching fractions for B {yields} {pi}{pi} and B {yields} K{pi} decays. A total of 347 million B{bar B} events collected by the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at SLAC are used for these results.

Aubert, B

2006-09-26

113

Preferential pi-pi complexation between tamoxifen and borage oil/gamma linolenic acid: transcutaneous delivery and NMR spectral modulation.  

PubMed

The effect of different proportions of borage oil on the in vitro transcutaneous delivery of tamoxifen were studied, with the aim of developing a gel capable of the simultaneous delivery of tamoxifen and gamma linolenic acid across (breast) skin. Supplementary work probed 1H NMR spectral data for tamoxifen in the presence of different proportions of polyunsaturated or unsaturated fatty acids. Typical, non-aqueous gels were modified to contain 1% tamoxifen and three levels of borage oil ( approximately 25% gamma linolenic acid) and the transcutaneous delivery of both tamoxifen and GLA across full thickness skin determined in vitro. Both tamoxifen and gamma linolenic acid permeated the skin with the ratio of moles being consistent at approximately 4:1. This was irrespective of time, amount of borage oil contained in the formulation (above a minimum) and the presence of other (unsaturated) excipients: mineral oil, Miglyiol 810N, white soft paraffin, PEG400 and Cabosil M5. Dose-dependent downfield shifts of tamoxifen aromatic protons were observed in the presence of borage oil and linolenic acid (gamma and alpha), but not saturated triacyl glycerol. The permeation data suggested vehicular complexation between tamoxifen and polyunsaturated constituents of borage oil and that such complexes permeated the skin intact. The 1H NMR data supported the hypothesis that such complexation was a consequence of preferential pi-pi orbital interactions between the phenyl groups of tamoxifen and the multiple double bonds of GLA. The mechanism for the permeation of intact complexes across skin remains to be elucidated. PMID:16115741

Heard, Charles M; Gallagher, Simon J; Congiatu, Costantino; Harwood, John; Thomas, Christopher P; McGuigan, Christopher; Nemcová, Marta; Nouskova, Tereza

2005-09-30

114

Force-field dependence of Boltzmann weighting factors on predicted pi-pi* circular dichroic spectra of cyclo (Gly-Pro-Gly)2.  

PubMed

Semi-empirical energy calculations were performed for published conformations of cyclo (Gly-Pro-Gly)2 using different force fields (DISCOVER cvff and cff91, AMBER, and CHARMM). The resulting potential energies were then used to create Boltzmann weighting factors for an ensemble of cyclo(Gly-Pro-Gly)2 structures. The dipole interaction model was used to predict pi-pi* circular dichroic spectra (CD) for the individual structures of cyclo(Gly-Pro-Gly)2. The Boltzmann weighting factors were applied to the individual spectra so that a composite spectrum was constructed to represent a CD arising from a collection of different structures in solution. Weighting factors determined from different force fields were compared. Boltzmann-weighted spectra better resembled the experimental CD than any calculated spectrum using only a single conformation of cyclo (Gly-Pro-Gly)2. The structures most heavily weighted contained at least one type I beta-turn. PMID:8836772

MacFarlane, K J; Humbert, M M; Thomasson, K A

1996-06-01

115

Scalar resonances in a unitary {pi}{pi} S-wave model for D{sup +} {r_arrow} {pi}{sup+}{pi}{sup-}{pi}{sup+}.  

SciTech Connect

We propose a model for D{sup +} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup +} decays following experimental results which indicate that the two-pion interaction in the S wave is dominated by the scalar resonances f{sub 0}(600)/{sigma} and f{sub 0}(980). The weak decay amplitude for D{sup +} {yields} R{pi}{sup +}, where R is a resonance that subsequently decays into {pi}{sup +}{pi}{sup -}, is constructed in a factorization approach. In the S wave, we implement the strong decay R {yields} {pi}{sup +}{pi}{sup -} by means of a scalar form factor. This provides a unitary description of the pion-pion interaction in the entire kinematically allowed mass range m{sub {pi}{pi}}{sup 2} from threshold to about 3 GeV{sup 2}. In order to reproduce the experimental Dalitz plot for D{sup +} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup +}, we include contributions beyond the S wave. For the P wave, dominated by the {rho}(770){sup 0}, we use a Breit-Wigner description. Higher waves are accounted for by using the usual isobar prescription for the f{sub 2}(1270) and {rho}(1450){sup 0}. The major achievement is a good reproduction of the experimental m{sub {pi}{pi}}{sup 2} distribution, and of the partial as well as the total D{sup +} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup +} branching ratios. Our values are generally smaller than the experimental ones. We discuss this shortcoming and, as a by-product, we predict a value for the poorly known D {yields} {sigma} transition form factor at q{sup 2} = m{sub {pi}}{sup 2}.

Boito, D. R.; Dedonder, J.-P.; El-Bennich, B.; Leitner, O.; Loiseau, B.; Physics; Univ. Autonoma de Barcelona; Univ. de Sao Paulo; Univ. Paris; Pl. Jussieu; Lab. Nazionali de Frascati

2009-02-19

116

RPLsh: An Interactive Shell for Stack-based Numerical Computation  

NASA Astrophysics Data System (ADS)

RPL shell or RPLsh, is an interactive numerical shell designed to combine the convenience of a hand-held calculator with the computational power and advanced numerical functionality of a workstation. The user interface is modelled after stack-based scientific calculators such as those made by Hewlett-Packard RPL is the name of the Forth-like programming language used in the HP 48 series), but includes many features not found in hand-held devices, such as a multi-threaded kernel with job control, integrated extended precision arithmetic, a large library of special functions, and a dynamic, resizable window display. As a native C/C++ application, it is over 1000 times faster than HP 48 emulators (e.g. Emu48 ) in simple benchmarks; for extended precision numerical analysis, its performance can exceed that of Mathematica by similar amounts. Current development focuses on interactive user functionality, with comprehensive programming and debugging support to follow.

Rauch, Kevin P.

117

Diffractive Dissociation into {pi}{sup -{pi}-{pi}+} Final States at COMPASS  

SciTech Connect

QCD predicts gluonic excitations like hybrids to contribute to the meson spectrum in addition to qq-bar pair configurations. The most promising way to identify such states is the search for J{sup PC} quantum number combinations which are forbidden in the constituent quark model. The fixed target COMPASS experiment at CERN offers the opportunity to search for such states in the light quark sector with an unprecedented statistics.Diffractive reactions of 190 GeV/c pions on a lead target were studied by COMPASS during a pilot run in 2004. A Partial Wave Analysis (PWA) of the {pi}{sup -{pi}-{pi}+} final state with 42 waves including acceptance corrections through a phase-space Monte Carlo simulation of the spectrometer was performed. The exotic {pi}{sub 1}(1600) meson with quantum numbers J{sup PC} = 1{sup -+} has been clearly established in the rho-pi decay channel with a mass of 1660{+-}10(stat) MeV/c{sup 2} and a width of 269{+-}21(stat) MeV/c{sup 2}. The improved detector performance in 2008 allows us to study this channel with significantly higher statistics. First results of the ongoing analysis of the 2008 data taking period, using a 190 GeV/c pion beam on a liquid hydrogen target are presented in this paper.

Haas, Florian [Physik Department E18, Technische Universitaet Muenchen James Franck Str., D-85748 Garching (Germany)

2010-08-05

118

RKKY interaction in AB-stacked multilayer graphene  

NASA Astrophysics Data System (ADS)

The RKKY interaction between two magnetic impurities absorbed on the surface layer of half-filled AB-stacked multilayer graphene (ABSMLG) is theoretically studied based on the lattice Green’s function technique. In comparison with the case of monolayer graphene, the RKKY interaction in such multilayer graphene presents distinct properties in some aspects. Firstly, from the numerical results, we find that the thickness of the ABSMLG influences the RKKY interaction in a complicated manner, depending on the odd/even parity of the number of layers and the sublattice attribution of the positions of the two magnetic impurities. Then, we derive the asymptotic expressions of the RKKY interactions in ABSMLG in the long-distance limit. For even-layered ABSMLG, we find that the RKKY interactions of the 1A-1A, 1B-1A and 1B-1B couplings fall off as 1/R2, 1/R4 and 1/R6 (1A and 1B stand for, respectively, the sublattice points in the surface layer, which are positioned directly on the plaquette and on a lattice point of the layer underneath). On the other hand, in odd-layered ABSMLG, the decays of these interactions follow the 1/R2, 1/R3 and 1/R3 power laws respectively. In addition, we also find that these analytical expressions are quantitatively valid to describe the RKKY interaction in ABSMLG when the distance between the two magnetic impurities is larger than the lattice constant of graphene by one order of magnitude.

Jiang, Liwei; Lü, Xiaoling; Gao, Wenzhu; Yu, Guodong; Liu, Zhe; Zheng, Yisong

2012-05-01

119

Kinematically complete measurement of the (pi+\\/-,pi+\\/-p) reaction on 12C at 220 MeV  

Microsoft Academic Search

The 12C(pi+\\/-,pi+\\/-p) reactions were studied at Tpi=220 MeV. The final particles were detected both separately and in coincidence and their momenta were measured. Calculation of the excitation energy of the residual nucleus allowed clear separation of events where an outer proton was removed. The data provide detailed evidence confirming the quasielastic picture of pion knockout reactions. Evidence for this derives

J. A. Faucett; B. E. Wood; D. K. McDaniels; P. A. M. Gram; M. E. Hamm; M. A. Oothoudt; C. A. Goulding; L. W. Swenson; K. S. Krane; A. W. Stetz; H. S. Plendl; J. Norton; H. Funsten; D. Joyce

1984-01-01

120

Study of B0 --> J/psiK(*)0pi(+)pi(-) decays with the collider detector at Fermilab.  

PubMed

We report a study of the decays B0 --> J/psiK(*)0pi(+)pi(-), which involve the creation of a uu or dd quark pair in addition to a b -->c(cs) decay. The data sample consists of 110 pb(-1) of pp collisions at square root[s] = 1.8 TeV collected by the CDF detector at the Fermilab Tevatron collider during 1992-1995. We measure the branching fractions to be B(B0 --> J/psiK(*0)pi(+)pi(-)) = (6.6 +/- 1.9 +/- 1.1)x10(-4) and B(B0 --> J/psiK0pi(+)pi(-)) = (10.3 +/- 3.3 +/- 1.5)x10(-4). Evidence is seen for contributions from psi(2S)K(*)0, J/psiK0rho(0), J/psiK(*+)pi(-), and J/psiK1(1270). PMID:11863882

Affolder, T; Akimoto, H; Akopian, A; Albrow, M G; Amaral, P; Amidei, D; Anikeev, K; Antos, J; Apollinari, G; Arisawa, T; Artikov, A; Asakawa, T; Ashmanskas, W; Azfar, F; Azzi-Bacchetta, P; Bacchetta, N; Bachacou, H; Bailey, S; de Barbaro, P; Barbaro-Galtieri, A; Barnes, V E; Barnett, B A; Baroiant, S; Barone, M; Bauer, G; Bedeschi, F; Belforte, S; Bell, W H; Bellettini, G; Bellinger, J; Benjamin, D; Bensinger, J; Beretvas, A; Berge, J P; Berryhill, J; Bhatti, A; Binkley, M; Bisello, D; Bishai, M; Blair, R E; Blocker, C; Bloom, K; Blumenfeld, B; Blusk, S R; Bocci, A; Bodek, A; Bokhari, W; Bolla, G; Bonushkin, Y; Bortoletto, D; Boudreau, J; Brandl, A; van den Brink, S; Bromberg, C; Brozovic, M; Brubaker, E; Bruner, N; Buckley-Geer, E; Budagov, J; Budd, H S; Burkett, K; Busetto, G; Byon-Wagner, A; Byrum, K L; Cabrera, S; Calafiura, P; Campbell, M; Carithers, W; Carlson, J; Carlsmith, D; Caskey, W; Castro, A; Cauz, D; Cerri, A; Chan, A W; Chang, P S; Chang, P T; Chapman, J; Chen, C; Chen, Y C; Cheng, M-T; Chertok, M; Chiarelli, G; Chirikov-Zorin, I; Chlachidze, G; Chlebana, F; Christofek, L; Chu, M L; Chung, Y S; Ciobanu, C I; Clark, A G; Colijn, A P; Connolly, A; Conway, J; Cordelli, M; Cranshaw, J; Cropp, R; Culbertson, R; Dagenhart, D; D'Auria, S; DeJongh, F; Dell'Agnello, S; Dell'Orso, M; Demortier, L; Deninno, M; Derwent, P F; Devlin, T; Dittmann, J R; Dominguez, A; Donati, S; Done, J; D'Onofrio, M; Dorigo, T; Eddy, N; Einsweiler, K; Elias, J E; Engels, E; Erbacher, R; Errede, D; Errede, S; Fan, Q; Fang, H-C; Feild, R G; Fernandez, J P; Ferretti, C; Field, R D; Fiori, I; Flaugher, B; Foster, G W; Franklin, M; Freeman, J; Friedman, J; Fukui, Y; Furic, I; Galeotti, S; Gallas, A; Gallinaro, M; Gao, T; Garcia-Sciveres, M; Garfinkel, A F; Gatti, P; Gay, C; Gerdes, D W; Giannetti, P; Giromini, P; Glagolev, V; Glenzinski, D; Gold, M; Goldstein, J; Gorelov, I; Goshaw, A T; Gotra, Y; Goulianos, K; Green, C; Grim, G; Gris, P; Groer, L; Grosso-Pilcher, C; Guenther, M; Guillian, G; Guimaraes da Costa, J; Haas, R M; Haber, C; Hahn, S R; Hall, C; Handa, T; Handler, R; Hao, W; Happacher, F; Hara, K; Hardman, A D; Harris, R M; Hartmann, F; Hatakeyama, K; Hauser, J; Heinrich, J; Heiss, A; Herndon, M; Hill, C; Hoffman, K D; Holck, C; Hollebeek, R; Holloway, L; Huffman, B T; Hughes, R; Huston, J; Huth, J; Ikeda, H; Incandela, J; Introzzi, G; Iwai, J; Iwata, Y; James, E; Jones, M; Joshi, U; Kambara, H; Kamon, T; Kaneko, T; Karr, K; Kasha, H; Kato, Y; Keaffaber, T A; Kelley, K; Kelly, M; Kennedy, R D; Kephart, R; Khazins, D; Kikuchi, T; Kilminster, B; Kim, B J; Kim, D H; Kim, H S; Kim, M J; Kim, S B; Kim, S H; Kim, Y K; Kirby, M; Kirk, M; Kirsch, L; Klimenko, S; Koehn, P; Kondo, K; Konigsberg, J; Korn, A; Korytov, A; Kovacs, E; Kroll, J; Kruse, M; Kuhlmann, S E; Kurino, K; Kuwabara, T; Laasanen, A T; Lai, N; Lami, S; Lammel, S; Lancaster, J; Lancaster, M; Lander, R; Lath, A; Latino, G; LeCompte, T; Lee, A M; Lee, K; Leone, S; Lewis, J D; Lindgren, M; Liss, T M; Liu, J B; Liu, Y C; Litvintsev, D O; Lobban, O; Lockyer, N; Loken, J; Loreti, M; Lucchesi, D; Lukens, P; Lusin, S; Lyons, L; Lys, J; Madrak, R; Maeshima, K; Maksimovic, P; Malferrari, L; Mangano, M; Mariotti, M; Martignon, G; Martin, A; Matthews, J A J; Mayer, J; Mazzanti, P; McFarland, K S; McIntyre, P; McKigney, E; Menguzzato, M; Menzione, A; Merkel, P; Mesropian, C; Meyer, A; Miao, T; Miller, R; Miller, J S; Minato, H; Miscetti, S; Mishina, M; Mitselmakher, G; Moggi, N; Moore, E; Moore, R; Morita, Y; Moulik, T; Mulhearn, M; Mukherjee, A; Muller, T; Munar, A; Murat, P; Murgia, S; Nachtman, J; Nagaslaev, V; Nahn, S; Nakada, H; Nakano, I; Nelson, C; Nelson, T; Neu, C; Neuberger, D; Newman-Holmes, C; Ngan, C-Y P; Niu, H; Nodulman, L; Nomerotski, A; Oh, S H; Oh, Y D; Ohmoto, T; Ohsugi, T; Oishi, R; Okusawa, T; Olsen, J; Orejudos, W; Pagliarone, C; Palmonari, F; Paoletti, R; Papadimitriou, V; Partos, D; Patrick, J; Pauletta, G; Paulini, M; Paus, C; Pellett, D; Pescara, L; Phillips, T J; Piacentino, G; Pitts, K T; Pompos, A; Pondrom, L; Pope, G; Popovic, M; Prokoshin, F; Proudfoot, J; Ptohos, F; Pukhov, O; Punzi, G; Rakitine, A; Ratnikov, F; Reher, D; Reichold, A; Ribon, A; Riegler, W; Rimondi, F; Ristori, L; Riveline, M; Robertson, W J; Robinson, A; Rodrigo, T; Rolli, S; Rosenson, L; Roser, R; Rossin, R; Rott, C; Roy, A; Ruiz, A; Safonov, A; St Denis, R; Sakumoto, W K; Saltzberg, D; Sanchez, C; Sansoni, A; Santi, L; Sato, H; Savard, P; Schlabach, P; Schmidt, E E; Schmidt, M P; Schmitt, M; Scodellaro, L; Scott, A; Scribano, A; Segler, S; Seidel, S; Seiya, Y; Semenov, A; Semeria, F; Shah, T; Shapiro, M D; Shepard, P F; Shibayama, T; Shimojima, M; Shochet, M; Sidoti, A; Siegrist, J; Sill, A; Sinervo, P; Singh, P; Slaughter, A J; Sliwa, K; Smith, C; Snider, F D; Solodsky, A; Spalding, J; Speer, T; Sphicas, P; Spinella, F; Spiropulu, M; Spiegel, L; Steele, J; Stefanini, A; Strologas, J

2002-01-30

121

Update of the e^+e^-\\\\to\\\\pi^+\\\\pi^- cross section measured by SND detector in the energy region 400<\\\\sqrt{s}<1000 MeV  

Microsoft Academic Search

The corrected cross section of the e^+e^-\\\\to\\\\pi^+\\\\pi^- process measured in\\u000athe SND experiment at the VEPP-2M e^+e^- collider is presented. The update is\\u000anecessary due to a flaw in the e^+e^-\\\\to\\\\pi^+\\\\pi^- and e^+e^-\\\\to\\\\mu^+\\\\mu^-\\u000aMonte Carlo events generators used previously in data analysis.

M. N. Achasov; K. I. Beloborodov; A. V. Berdyugin; A. G. Bogdanchikov; A. V. Bozhenok; A. D. Bukin; D. A. Bukin; T. V. Dimova; V. P. Druzhinin; V. B. Golubev; A. A. Korol; S. V. Koshuba; E. V. Pakhtusova; S. I. Serednyakov; Yu. M. Shatunov; V. A. Sidorov; Z. K. Silagadze; A. N. Skrinsky; Yu. A. Tikhonov; A. V. Vasiljev

2006-01-01

122

Analysis of non-covalent interactions in (bio)organic molecules using orbital-partitioned localized MP2.  

PubMed

Localized molecular orbitals (LMO) are used as basis for an MP2 treatment (LMP2) of electron correlation energies. The major aim is an improved understanding of the non-covalent interactions in large molecules with an emphasis on intra-molecular dispersion effects. A partitioning of the inter-fragment electron correlation energy into electron pairs of different orbital type (i.e., sigma, pi, lone-pairs) is presented. The benzene dimer, 1,4-diphenylbutane conformations, and the tyrosine-glycine dipeptide are used as model systems. For the benzene dimer, comparisons with CCSD(T) data are made in order to analyse the MP2 problems for pi-pi stacking. A comparison of phenyl-phenyl interactions in the benzene dimer and for 1,4-diphenylbutane conformations reveals a very good transferability of dispersion-type contributions to binding from an inter-molecular to an intra-molecular situation. In both systems, the relative (percentage) contributions of sigma-sigma, sigma-pi, and pi-pi pairs to the total inter-fragment correlation energy is a clear signature for the binding mode (pi-stacked vs. T-shaped). For various benzene dimer conformations, we find a linear relation between the MP2 interaction energy error and the correlation contribution from pi-pi pairs. In the dipeptide, also dispersion-type electron correlations between the glycyl amino acid residue and the phenol group are most relevant for folding. This convincingly explains problems of DFT with such systems reported previously. Although in this case only one aromatic ring (and a glycyl moiety) is involved, the same sigma-sigma, sigma-pi, and pi-pi correlations seem to dominate the shape of the potential energy surface. PMID:18535714

Grimme, Stefan; Mück-Lichtenfeld, Christian; Antony, Jens

2008-05-15

123

Search for resonances decaying to etac pi pi- in two-photon interactions  

SciTech Connect

We report a study of the process {gamma}{gamma} {yields} X {yields} {eta}{sub c}{pi}{sup +}{pi}{sup -}, where X stands for one of the resonances {chi}{sub c2}(1P), {eta}{sub c}(2S), X(3872), X(3915), or {chi}{sub c2}(2P). The analysis is performed with a data sample of 473.9 fb{sup -1} collected with the BABAR detector at the PEP-II asymmetric-energy electron-positron collider. We do not observe a significant signal for any channel, and calculate 90% confidence-level upper limits on the products of branching fractions and two-photon widths {Lambda}{sub X{yields}{gamma}{gamma}} {Beta}(X {yields} {eta}{sub c}{pi}{sup +}{pi}{sup -}): 15.7 eV for {chi}{sub c2}(1P), 133 eV for {eta}{sub c}(2S), 11.1 eV for X(3872) (assuming it to be a spin-2 state), 16 eV for X(3915) (assuming it to be a spin-2 state), and 19 eV for {chi}{sub c2}(2P). We also report upper limits on the ratios of branching fractions {Beta}({eta}{sub c}(2S) {yields} {eta}{sub c}{pi}{sup +}{pi}{sup -})/{Beta}({eta}{sub c}(2S) {yields} K{sub S}{sup 0}K{sup +}{pi}{sup -}) < 10.0 and {Beta}({chi}{sub c2}(1P) {yields} {eta}{sub c}{pi}{sup +}{pi}{sup -})/{Beta}({chi}{sub c2}(1P) {yields} K{sub S}{sup 0}K{sup +}{pi}{sup -}) < 32.9 at the 90% confidence level.

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, D.N.; 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..

2012-06-18

124

Measurement of CP Asymmetries and Branching Fractions in B0 -> pi+ pi-, B0 -> K+ pi-, B0 -> pi0 pi0, B0 -> K0 pi0 and Isospin Analysis of B -> pi pi Decays  

SciTech Connect

The authors present preliminary results of improved measurements of the CP-violating asymmetries and branching fractions in the decays B{sup 0} {yields} {pi}{sup +}{pi}{sup -}, B{sup 0} {yields} K{sup +}{pi}{sup -}, B{sup 0} {yields} {pi}{sup 0}{pi}{sup 0}, and B{sup 0} {yields} K{sup 0}{pi}{sup 0}. This update includes all data taken at the {Upsilon}(4S) resonance by the BABAR experiment at the asymmetric PEP-II B-meson factory at SLAC, corresponding to 467 {+-} 5 million B{bar B} pairs. They find S{sub {pi}{pi}} = -0.68 {+-} 0.10 {+-} 0.03, C{sub {pi}{pi}} = -0.25 {+-} 0.08 {+-} 0.02, {Alpha}{sub K{sub {pi}}} = -0.107 {+-} 0.016{sub -0.004},{sup +0.006}, C{sub {pi}{sup 0}{pi}{sup 0}} = -0.43 {+-} 0.26 {+-} 0.05, {Beta}(B{sup 0} {yields} {pi}{sup 0}{pi}{sup 0}) = (1.83 {+-} 0.21 {+-} 0.13) x 10{sup -6}, {Beta}(B{sup 0} {yields} K{sup 0}{pi}{sup 0}) = (10.1 {+-} 0.6 {+-} 0.4) x 10{sup -6}, where the first error is statistical and the second is systematic. They observe CP violation with a significance of 6.7{sigma} in B{sup 0} {yields} {pi}{sup -} and 6.1{sigma} in B{sup 0} {yields} K{sup +}{pi}{sup -}. Constraints on the Unitarity Triangle angle {alpha} are determined from the isospin relation between all B {yields} {pi}{pi} rates and asymmetries.

Aubert, Bernard; Bona, M.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Lopez, L.; Palano, Antimo; Pappagallo, M.; /Bari U. /INFN, Bari; Eigen, G.; Stugu, Bjarne; Sun, L.; /Bergen U.; Abrams, G.S.; Battaglia, M.; Brown, D.N.; Cahn, Robert N.; Jacobsen, R.G.; /LBL, 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. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa 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. /Consorzio Milano Ricerche /INFN, Milan /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /Napoli Seconda U. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /Padua U. /INFN, Padua /Paris U., VI-VII /Pennsylvania U. /Perugia U. /INFN, Perugia /INFN, Pisa /Princeton U. /Banca di Roma /Frascati /Rostock U. /Rutherford /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. /INFN, Trieste /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

2008-08-01

125

Precise Measurement of the e+e--->pi+pi-(gamma) Cross Section with the Initial State Radiation Method at BABAR  

Microsoft Academic Search

A precise measurement of the cross section of the process e+e--->pi+pi-(gamma) from threshold to an energy of 3 GeV is obtained with the initial state radiation (ISR) method using 232fb-1 of data collected with the BABAR detector at e+e- center-of-mass energies near 10.6 GeV. The ISR luminosity is determined from a study of the leptonic process e+e--->mu+mu-gamma(gamma). The leading-order hadronic

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; 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; W. R. Innes

2009-01-01

126

Measurement of e+e--- >pi+pi- cross-section with CMD2 around \\/rho-meson  

Microsoft Academic Search

The cross-section of the process e+e--->pi+pi- has been measured using about 114000 events collected by the CMD-2 detector at the VEPP-2M e+e- collider in the center-of-mass energy range from 0.61 to 0.96 GeV. Results of the pion form factor determination with a 0.6% systematic uncertainty are presented. The following values of the \\/rho- and \\/omega-meson parameters were found: Mrho=(776.09+\\/-0.81) MeV,

R. R. Akhmetshin; E. V. Anashkin; A. B. Arbuzov; V. M. Aulchenko; V. Sh. Banzarov; L. M. Barkov; S. E. Baru; N. S. Bashtovoy; A. E. Bondar; D. V. Bondarev; A. V. Bragin; D. V. Chernyak; S. Dhawan; S. I. Eidelman; G. V. Fedotovich; N. I. Gabyshev; D. A. Gorbachev; A. A. Grebenuk; D. N. Grigoriev; V. W. Hughes; F. V. Ignatov; S. V. Karpov; V. F. Kazanin; B. I. Khazin; I. A. Koop; P. P. Krokovny; E. A. Kuraev; L. M. Kurdadze; A. S. Kuzmin; I. B. Logashenko; P. A. Lukin; A. P. Lysenko; K. Yu. Mikhailov; J. P. Miller; A. I. Milstein; I. N. Nesterenko; V. S. Okhapkin; A. A. Polunin; A. S. Popov; T. A. Purlatz; B. L. Roberts; N. I. Root; A. A. Ruban; N. M. Ryskulov; A. G. Shamov; Yu. M. Shatunov; B. A. Shwartz; A. L. Sibidanov; V. A. Sidorov; A. N. Skrinsky; V. P. Smakhtin; I. G. Snopkov; E. P. Solodov; P. Yu. Stepanov; A. I. Sukhanov; J. A. Thompson; V. M. Titov; Yu. Y. Yudin; S. G. Zverev

2002-01-01

127

Modulating the Light Switch by [superscript 3]MLCT-[superscript 3]pi pi* State Interconversion  

SciTech Connect

The spectroscopic, electronic, and DNA-binding characteristics of two novel ruthenium complexes based on the dialkynyl ligands 2,3-bis(phenylethynyl)-1,4,8,9-tetraaza-triphenylene (bptt, 1) and 2,3-bis(4-tert-butyl-phenylethynyl)-1,4,8,9-tetraaza-triphenylene (tbptt, 2) have been investigated. Electronic structure calculations of bptt reveal that the frontier molecular orbitals are localized on the pyrazine-dialkynyl portion of the free ligand, a property that is reflected in a red shift of the lowest energy electronic transition (1: {lambda}{sub max} = 393 nm) upon substitution at the terminal phenyl groups (2: {lambda}{sub max} = 398 nm). Upon coordination to ruthenium, the low-energy ligand-centered transitions of 1 and 2 are retained, and metal-to-ligand charge transfer transitions (MLCT) centered at {lambda}{sub max} = 450 nm are observed for [Ru(phen){sub 2}bptt]{sup 2+}(3) and [Ru(phen){sub 2}tbptt]{sup 2+}(4). The photophysical characteristics of 3 and 4 in ethanol closely parallel those observed for [Ru(bpy){sub 3}]{sup 2+} and [Ru(phen){sub 3}]{sup 2+}, indicating that the MLCT excited state is primarily localized within the [Ru(phen){sub 3}]{sup 2+} manifold of 3 and 4, and is only sparingly affected by the extended conjugation of the bptt framework. In an aqueous environment, 3 and 4 possess notably small luminescence quantum yields (3: {phi}H{sub 2}O = 0.005, 4: {phi}H{sub 2}O = 0.011) and biexponential decay kinetics (3: {tau}{sub 1} = 40 ns, {tau}{sub 2} = 230 ns; 4: {tau}{sub 1} {approx} 26 ns, {tau}{sub 2} = 150 ns). Addition of CT-DNA to an aqueous solution of 3 causes a significant increase in the luminescence quantum yield ({phi}DNA = 0.045), while the quantum yield of 4 is relatively unaffected ({phi}DNA = 0.013). The differential behavior demonstrates that tert-butyl substitution on the terminal phenyl groups inhibits the ability of 4 to intercalate with DNA. Such changes in intrinsic luminescence demonstrate that 3 binds to DNA via intercalation (K{sub b} = 3.3 x 10{sup 4} M{sup -1}). The origin of this light switch behavior involves two competing {sup 3}MLCT states similar to that of the extensively studied light switch molecule [Ru(phen){sub 2}dppz]{sup 2+}. The solvent- and temperature-dependence of the luminescence of 3 reveal that the extended ligand aromaticity lowers the energy of the {sup 3}{pi}{pi}* excited state into competition with the emitting {sup 3}MLCT state. Interconversion between these two states plays a significant role in the observed photophysics and is responsible for the dual emission in aqueous environments.

Spencer, Brigitte R.; Kraft, Brian J.; Hughes, Chris G.; Pink, Maren; Zaleski, Jeffrey M. (Indiana)

2012-01-20

128

pi-Stacked hydrogen-bonded sheets in N,N'-bis(4-nitrobenzylidene)ethane-1,2-diamine and pi-stacked hydrogen-bonded chains in N,N'-bis(4-nitrobenzylidene)propane-1,3-diamine.  

PubMed

Molecules of N,N'-bis(4-nitrobenzylidene)ethane-1,2-diamine, C16H14N4O4, (I), lie across centres of inversion in space group P2(1)/n and are linked into (10-1) sheets by a single C-H...O hydrogen bond [H...O = 2.40 A, C...O = 3.2166 (13) A and C-H...O = 146 degrees ]; these sheets are linked into a three-dimensional array by a single aromatic pi-pi stacking interaction. Molecules of N,N'-bis(4-nitrobenzylidene)propane-1,3-diamine, C17H16N4O4, (II), lie across twofold rotation axes in space group C2/c and are linked into chains of spiro-fused rings by a single C-H...O hydrogen bond [H...O = 2.54 A, C...O = 3.267 (2) A and C-H...O = 130 degrees ]; these chains are linked into sheets by a single aromatic pi-pi stacking interaction. PMID:15640596

Bomfim, Joao A S; Wardell, James L; Low, John N; Skakle, Janet M S; Glidewell, Christopher

2004-12-18

129

Study of the D0 ---> pi- pi+ pi- pi+ decay  

SciTech Connect

Using data from the FOCUS (E831) experiment at Fermilab, they present new measurements for the Cabbibo-suppressed decay mode D{sup 0} {yields} {pi}{sup -}{pi}{sup +}{pi}{sup -}{pi}{sup +}. They measure the branching ratio {Lambda}(D{sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -})/{Lambda}(D{sup 0} {yields} K{sup -} {pi}{sup +}{pi}{sup -}{pi}{sup +}) = 0.0914 {+-} 0.0018 {+-} 0.0022. An amplitude analysis has been performed, a first for this channel, in order to determine the resonant substructure of this decay mode. The dominant component is the decay D{sup 0} {yields} a{sub 1}(1260){sup +}{pi}{sup -}, accounting for 60% of the decay rate. The second most dominant contribution comes from the decay D{sup 0} {yields} {rho}(770){sup 0}{rho}(770){sup 0}, with a fraction of 25%. They also study the a{sub 1}(1260) line shape and resonant substructure. Using the helicity formalism for the angular distribution of the decay D{sup 0} {yields} {rho}(770){sup 0}{rho}(770){sup 0}, they measure a longitudinal polarization of P{sub L} = (71 {+-} 4 {+-} 2)%.

Link, J.M.; Yager, P.M.; /UC, Davis; Anjos, J.C.; Bediaga, I.; Castromonte, C.; Machado, A.A.; Magnin, J.; Massafferri, A.; de Miranda, J.M.; Pepe, I.M.; Polycarpo, E.; /Rio de Janeiro, CBPF /CINVESTAV, IPN /Colorado U. /Fermilab /Frascati /Guanajuato U. /Illinois U., Urbana /Indiana U. /Korea U. /Kyungpook Natl. U. /INFN, Milan /Milan U.

2007-01-01

130

Density Functional Analysis of Stabilizing Effects of Stacking Interactions in Nucleic Acid Base Pair Steps  

NASA Astrophysics Data System (ADS)

Base pair stacking interactions contribute significantly to the stability of DNA. In addition, numerous studies highlight the stabilizing effect of thymine within DNA. Electrostatic, van der Waals (vdW) and hydrophobic interactions all contribute to these stacking interactions, but their relative contributions are unclear. In this paper, we use the newly developed vdW density functional to investigate the importance of vdW interactions to stacking interactions between Watson-Crick DNA base pairs. Our results indicate that these interactions are essential for defining both the base pair step distance and the helical twist angle of DNA. Furthermore, we show that the stability gained from the presence of thymine is due to vdW interactions between the methyl group of the thymine with neighboring bases. Dion, Rydberg, Schr"oder, Langreth, Lundqvist, PRL 92, 246401 (2004)

Langreth, David C.; Cooper, Valentino R.; Thonhauser, Timo; Puzder, Aaron; Schröder, Elsebeth; Lundqvist, Bengt I.

2007-03-01

131

Measurement of Partial Widths and Search for Direct CP Violation in D0 Meson Decays to K-K+ and pi-pi+  

Microsoft Academic Search

We present a measurement of relative partial widths and decay rate CP asymmetries in K-K+ and pi-pi+ decays of D0 mesons produced in pp¯ collisions at &surd;(s)=1.96 TeV. We use a sample of 2×105 D*+-->D0pi+ (and charge conjugate) decays with the D0 decaying to K-pi+, K-K+, and pi-pi+, corresponding to 123 pb-1 of data collected by the Collider Detector at

D. Acosta; 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; T. Arisawa; J.-F. Arguin; A. Artikov; W. Ashmanskas; A. Attal; F. Azfar; P. Azzi-Bacchetta; N. Bacchetta; H. Bachacou; W. Badgett; A. Barbaro-Galtieri; G. J. Barker; V. E. Barnes; B. A. Barnett; S. Baroiant; M. Barone; G. Bauer; F. Bedeschi; S. Belforte; 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; P. S. L. Booth; D. Bortoletto; J. Boudreau; S. Bourov; C. Bromberg; E. Brubaker; J. Budagov; H. S. Budd; K. Burkett; G. Busetto; P. Bussey; K. L. Byrum; S. Cabrera; P. Calafiura; M. Campanelli; M. Campbell; A. Canepa; M. Casarsa; D. Carlsmith; S. Carron; R. Carosi; M. Cavalli-Sforza; A. Castro; P. Catastini; D. Cauz; A. Cerri; C. Cerri; L. Cerrito; J. Chapman; C. Chen; Y. C. Chen; M. Chertok; G. Chiarelli; G. Chlachidze; F. Chlebana; I. Cho; K. Cho; D. Chokheli; M. L. Chu; S. Chuang; J. Y. Chung; W.-H. Chung; Y. S. Chung; C. I. Ciobanu; M. A. Ciocci; A. G. Clark; D. Clark; M. Coca; A. Connolly; M. Convery; J. Cranshaw; B. Cooper; M. Cordelli; G. Cortiana; J. Cuevas; R. Culbertson; C. Currat; D. Cyr; D. Dagenhart; S. da Ronco; S. D'Auria; P. de Barbaro; S. de Cecco; G. de Lentdecker; S. dell'Agnello; M. dell'Orso; S. Demers; L. Demortier; M. Deninno; D. de Pedis; P. F. Derwent; C. Dionisi; J. R. Dittmann; P. Doksus; A. Dominguez; S. Donati; M. Donega; J. Donini; M. D'Onofrio; T. Dorigo; V. Drollinger; K. Ebina; N. Eddy; R. Ely; R. Erbacher; M. Erdmann; D. Errede; S. Errede; R. Eusebi; H.-C. Fang; S. Farrington; I. Fedorko; R. G. Feild; M. Feindt; J. P. Fernandez; C. Ferretti; R. D. Field; I. Fiori; G. Flanagan; B. Flaugher; A. Foland; S. Forrester; G. W. Foster; M. Franklin; J. Freeman; H. Frisch; Y. Fujii; I. Furic; A. Gajjar; A. Gallas; J. Galyardt; M. Gallinaro; M. Garcia-Sciveres; A. F. Garfinkel; C. Gay; H. Gerberich; D. W. Gerdes; E. Gerchtein; S. Giagu; P. Giannetti; A. Gibson; K. Gibson; C. Ginsburg; K. Giolo; M. Giordani; G. Giurgiu; V. Glagolev; D. Glenzinski; M. Gold; N. Goldschmidt; D. Goldstein; J. Goldstein; G. Gomez; G. Gomez-Ceballos; M. Goncharov; O. González; I. Gorelov; A. T. Goshaw; Y. Gotra; K. Goulianos; A. Gresele; M. Griffiths; C. Grosso-Pilcher; M. Guenther; J. Guimaraes da Costa; C. Haber; K. Hahn; S. R. Hahn; E. Halkiadakis; R. Handler; F. Happacher; K. Hara; M. Hare; R. F. Harr; R. M. Harris; F. Hartmann; K. Hatakeyama; J. Hauser; C. Hays; H. Hayward; E. Heider; B. Heinemann; J. Heinrich; M. Hennecke; M. Herndon; C. Hill; D. Hirschbuehl; A. Hocker; K. D. Hoffman; A. Holloway; S. Hou; M. A. Houlden; B. T. Huffman; Y. Huang; R. E. Hughes; J. Huston; K. Ikado; J. Incandela; G. Introzzi; M. Iori; Y. Ishizawa; C. Issever; A. Ivanov; Y. Iwata; B. Iyutin; E. James; D. Jang; J. Jarrell; D. Jeans; H. Jensen; E. J. Jeon; M. Jones; K. K. Joo; S. Jun; T. Junk; T. Kamon; J. Kang; M. Karagoz Unel; P. E. Karchin; S. Kartal; 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; T. H. Kim; Y. K. Kim; B. T. King; M. Kirby; L. Kirsch; S. Klimenko; B. Knuteson; B. R. Ko; H. Kobayashi; P. Koehn; D. J. Kong; K. Kondo; J. Konigsberg; K. Kordas; A. Korn; A. Korytov; K. Kotelnikov; A. V. Kotwal; A. Kovalev; J. Kraus; I. Kravchenko; A. Kreymer; J. Kroll; M. Kruse; V. Krutelyov; S. E. Kuhlmann; N. Kuznetsova; A. T. Laasanen; S. Lai; S. Lami; S. Lammel; J. Lancaster; M. Lancaster; R. Lander; K. Lannon; A. Lath; G. Latino; R. Lauhakangas; I. Lazzizzera; Y. Le; C. Lecci; T. Lecompte; J. Lee; S. W. Lee; N. Leonardo; S. Leone; J. D. Lewis; K. Li; C. Lin; M. Lindgren; T. M. Liss; 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; L. Lyons; J. Lys; R. Lysak; D. MacQueen; R. Madrak; K. Maeshima; P. Maksimovic; L. Malferrari; G. Manca; R. Marginean; M. Martin; A. Martin; V. Martin; M. Martínez; T. Maruyama; H. Matsunaga; M. Mattson; P. Mazzanti; K. S. McFarland; D. McGivern; P. M. McIntyre; P. McNamara; R. Ncnulty; S. Menzemer; A. Menzione; P. Merkel; C. Mesropian; A. Messina; T. Miao; N. Miladinovic; L. Miller; R. Miller; J. S. Miller; R. Miquel; S. Miscetti; G. Mitselmakher; A. Miyamoto; Y. Miyazaki; N. Moggi; B. Mohr; R. Moore; M. Morello; A. Mukherjee; M. Mulhearn; T. Muller; R. Mumford; A. Munar; P. Murat; J. Nachtman; S. Nahn; I. Nakamura; I. Nakano; A. Napier; R. Napora; D. Naumov; V. Necula; F. Niell; J. Nielsen; C. Nelson; T. Nelson; C. Neu; M. S. Neubauer; C. Newman-Holmes; A.-S. Nicollerat; T. Nigmanov; L. Nodulman; O. Norniella; K. Oesterberg; T. Ogawa; S. H. Oh; Y. D. Oh; T. Ohsugi; T. Okusawa; R. Oldeman; R. Orava; W. Orejudos; C. Pagliarone

2005-01-01

132

Observation of a broad structure in the pi+ pi- J/psi mass spectrum around 4.26 GeV/c2.  

PubMed

We study initial-state radiation events, e+ e- --> gammaISR pi+ pi- J/psi, with data collected with the BABAR detector. We observe an accumulation of events near 4.26 GeV/c2 in the invariant-mass spectrum of pi+ pi- J/psi. Fits to the mass spectrum indicate that a broad resonance with a mass of about 4.26 GeV/c2 is required to describe the observed structure. The presence of additional narrow resonances cannot be excluded. The fitted width of the broad resonance is 50 to 90 MeV/c2, depending on the fit hypothesis. PMID:16241645

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A; Grauges, E; Palano, A; Pappagallo, M; Pompili, A; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S; Eigen, G; Ofte, I; Stugu, B; Abrams, G S; Battaglia, M; 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; Cuhadar-Donszelmann, T; Fulsom, B G; Hearty, C; Knecht, N S; Mattison, T S; McKenna, J A; Khan, A; Kyberd, P; Saleem, M; Teodorescu, L; Blinov, A E; Blinov, V E; Bukin, A D; Druzhinin, V P; Golubev, V B; Kravchenko, E A; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Solodov, E P; Yushkov, A N; Best, D; Bondioli, M; Bruinsma, M; Chao, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, A J; Lund, P; 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; Zhang, L; del Re, D; Hadavand, H K; Hill, E J; MacFarlane, D B; Paar, H P; Rahatlou, S; Sharma, V; Berryhill, J W; Campagnari, C; Cunha, A; Dahmes, B; Hong, T M; 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; Andreassen, R; Jayatilleke, S; Mancinelli, G; Meadows, B T; Sokoloff, M D; Blanc, F; Bloom, P; Chen, S; Ford, W T; Hirschauer, J F; Kreisel, A; Nauenberg, U; Olivas, A; Rankin, P; Ruddick, W O; Smith, J G; Ulmer, K A; Wagner, S R; Zhang, J; Chen, A; Eckhart, E A; Soffer, A; Toki, W H; Wilson, R J; Zeng, Q; Altenburg, D; Feltresi, E; Hauke, A; Spaan, B; Brandt, T; Brose, J; Dickopp, M; Klose, V; Lacker, H M; 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; Gradl, W; Muheim, F; Playfer, S; Xie, Y; Andreotti, M; Azzolini, V; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Luppi, E; Negrini, M; Piemontese, L; 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; Lo Vetere, M; Macri, M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Brandenburg, G; Chaisanguanthum, K S; Morii, M; Won, E; Wu, J; Dubitzky, R S; Langenegger, U; Marks, J; Schenk, S; Uwer, U; Bhimji, W; Bowerman, D A; Dauncey, P D; Egede, U; Flack, R L; Gaillard, J R; Morton, G W; Nash, J A; Nikolich, M B; Taylor, G P; Vazquez, W P; Charles, M J; Mader, W F; Mallik, U; Mohapatra, A K; Cochran, J; Crawley, H B; Eyges, V; 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; Oyanguren, A; Petersen, T C; Pierini, M; Plaszczynski, S; Rodier, S; Roudeau, P; Schune, M H; Stocchi, A; Wormser, G; Cheng, C H; Lange, D J; Simani, M C; Wright, D M; Bevan, A J; Chavez, C A; Forster, I J; Fry, J R; Gabathuler, E; Gamet, R; George, K A; Hutchcroft, D E; Parry, R J; Payne, D J; Schofield, K C; Touramanis, C; Cormack, C M; Di Lodovico, F; Menges, W; Sacco, R; Brown, C L; Cowan, G; Flaecher, H U; Green, M G; Hopkins, D A; Jackson, P S; McMahon, T R; Ricciardi, S; Salvatore, F; Brown, D; Davis, C L; Allison, J; Barlow, N R; Barlow, R J; Edgar, C L; Hodgkinson, M C; Kelly, M P; Lafferty, G D; Naisbit, M T; Williams, J C; Chen, C; Hulsbergen, W D; Jawahery, A; Kovalskyi, D; Lae, C K; Roberts, D A; Simi, G; Blaylock, G; Dallapiccola, C; Hertzbach, S S; Kofler, R; Koptchev, V B; Li, X; Moore, T B; Saremi, S; Staengle, H; Willocq, S; Cowan, R; Koeneke, K; Sciolla, G; Sekula, S J; Spitznagel, M; Taylor, F; Yamamoto, R K; Kim, H; 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; Viaud, B; Nicholson, H; Cavallo, N; De Nardo, G; 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; Jackson, P D; Kagan, H; Kass, R

2005-09-28

133

Measurement of D0- Dmacr 0 mixing using the ratio of lifetimes for the decays D0-->K-pi+, K-K+, and pi-pi+  

Microsoft Academic Search

We present a measurement of D0- Dmacr 0 mixing parameters using the ratios of lifetimes extracted from a sample of D0 mesons produced through the process D*+-->D0pi+, which decay to K-pi+, K-K+, or pi-pi+. The lifetimes of the CP-even, Cabibbo-suppressed modes K-K+ and pi-pi+ are compared with that of the CP-mixed, Cabibbo-favored mode K-pi+ to obtain a measurement of yCP,

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; 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; 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; M. A. Mazur; M. Morganti; N. Neri

2008-01-01

134

Observation of the Decay B±-->pi±pi0, Study of B±-->K±pi0, and Search for B0-->pi0pi0  

Microsoft Academic Search

We present results for the branching fractions and charge asymmetries in B±-->h±pi0 (where h±=pi±,K±) and a search for the decay B0-->pi0pi0 using a sample of approximately 88×106 BB¯ pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure B(B±-->pi±pi0)=(5.5+1.0-0.9±0.6)×10-6, where the first error is statistical and the second is systematic. The B±-->pi±pi0 signal has

B. Aubert; R. Barate; D. Boutigny; J.-M. Gaillard; A. Hicheur; Y. Karyotakis; J. P. Lees; P. Robbe; V. Tisserand; A. Zghiche; 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; M. S. Gill; A. V. Gritsan; Y. Groysman; R. G. Jacobsen; R. W. Kadel; J. Kadyk; L. T. Kerth; Yu. G. Kolomensky; J. F. Kral; G. Kukartsev; C. Leclerc; M. E. Levi; G. Lynch; L. M. Mir; P. J. Oddone; T. J. Orimoto; M. Pripstein; N. A. Roe; A. Romosan; M. T. Ronan; V. G. Shelkov; A. V. Telnov; W. A. Wenzel; T. J. Harrison; C. M. Hawkes; D. J. Knowles; R. C. Penny; A. T. Watson; N. K. Watson; T. Deppermann; K. Goetzen; H. Koch; B. Lewandowski; M. Pelizaeus; K. Peters; H. Schmuecker; M. Steinke; N. R. Barlow; W. Bhimji; J. T. Boyd; N. Chevalier; P. J. Clark; W. N. Cottingham; C. Mackay; F. F. Wilson; C. Hearty; T. S. Mattison; J. A. McKenna; D. Thiessen; P. Kyberd; A. K. McKemey; V. E. Blinov; A. D. Bukin; 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. Chao; D. Kirkby; A. J. Lankford; M. Mandelkern; S. McMahon; R. K. Mommsen; W. Roethel; D. P. Stoker; C. Buchanan; H. K. Hadavand; E. J. Hill; D. B. Macfarlane; H. P. Paar; Sh. Rahatlou; U. Schwanke; V. Sharma; J. W. Berryhill; C. Campagnari; B. Dahmes; N. Kuznetsova; S. L. Levy; O. Long; A. Lu; M. A. Mazur; J. D. Richman; W. Verkerke; J. Beringer; A. M. Eisner; C. A. Heusch; W. S. Lockman; T. Schalk; R. E. Schmitz; B. A. Schumm; A. Seiden; M. Turri; W. Walkowiak; D. C. Williams; M. G. Wilson; J. Albert; E. Chen; G. P. Dubois-Felsmann; A. Dvoretskii; D. G. Hitlin; I. Narsky; F. C. Porter; A. Ryd; A. Samuel; S. Yang; S. Jayatilleke; G. Mancinelli; B. T. Meadows; M. D. Sokoloff; T. Barillari; F. Blanc; P. Bloom; W. T. Ford; U. Nauenberg; A. Olivas; P. Rankin; J. Roy; J. G. Smith; W. C. van Hoek; L. Zhang; J. L. Harton; T. Hu; A. Soffer; W. H. Toki; R. J. Wilson; J. Zhang; D. Altenburg; T. Brandt; J. Brose; T. Colberg; M. Dickopp; R. S. Dubitzky; A. Hauke; H. M. Lacker; E. Maly; R. Müller-Pfefferkorn; R. Nogowski; S. Otto; K. R. Schubert; R. Schwierz; B. Spaan; L. Wilden; D. Bernard; G. R. Bonneaud; F. Brochard; J. Cohen-Tanugi; S. T'jampens; Ch. Thiebaux; G. Vasileiadis; M. Verderi; R. Bernet; A. Khan; D. Lavin; F. Muheim; S. Playfer; J. E. Swain; J. Tinslay; C. Borean; C. Bozzi; L. Piemontese; A. Sarti; E. Treadwell; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; D. Falciai; G. Finocchiaro; P. Patteri; I. M. Peruzzi; M. Piccolo; A. Zallo; A. Buzzo; R. Contri; G. Crosetti; M. Lo Vetere; M. Macri; M. R. Monge; S. Passaggio; F. C. Pastore; C. Patrignani; E. Robutti; A. Santroni; S. Tosi; S. Bailey; M. Morii; G. J. Grenier; S.-J. Lee; U. Mallik; J. Cochran; H. B. Crawley; J. Lamsa; W. T. Meyer; S. Prell; E. I. Rosenberg; J. Yi; M. Davier; G. Grosdidier; A. Höcker; S. Laplace; F. Le Diberder; V. Lepeltier; A. M. Lutz; T. C. Petersen; S. Plaszczynski; M. H. Schune; L. Tantot; G. Wormser; R. M. Bionta; V. Brigljevic; C. H. Cheng; D. J. Lange; D. M. Wright; A. J. Bevan; J. R. Fry; E. Gabathuler; R. Gamet; M. Kay; D. J. Payne; R. J. Sloane; C. Touramanis; M. L. Aspinwall; D. A. Bowerman; P. D. Dauncey; U. Egede; I. Eschrich; G. W. Morton; J. A. Nash; P. Sanders; G. P. Taylor; J. J. Back; G. Bellodi; P. F. Harrison; H. W. Shorthouse; P. Strother; P. B. Vidal; G. Cowan; H. U. Flaecher; S. George; M. G. Green; A. Kurup; C. E. Marker; T. R. McMahon; S. Ricciardi; F. Salvatore; G. Vaitsas; M. A. Winter; C. L. Davis; J. Allison; R. J. Barlow; A. C. Forti; P. A. Hart; F. Jackson; G. D. Lafferty; A. J. Lyon; J. H. Weatherall; J. C. Williams; A. Farbin; A. Jawahery; D. Kovalskyi; C. K. Lae; V. Lillard; D. A. Roberts; G. Blaylock; C. Dallapiccola; K. T. Flood; S. S. Hertzbach; R. Kofler; V. B. Koptchev; T. B. Moore; H. Staengle; S. Willocq; R. Cowan; G. Sciolla; F. Taylor; R. K. Yamamoto; D. J. Mangeol; M. Milek; P. M. Patel; F. Palombo; J. M. Bauer; L. Cremaldi; V. Eschenburg; R. Kroeger; J. Reidy; D. A. Sanders; D. J. Summers; H. W. Zhao; C. Hast; P. Taras; H. Nicholson; C. Cartaro; N. Cavallo; G. de Nardo; F. Fabozzi; C. Gatto; L. Lista; P. Paolucci; D. Piccolo; C. Sciacca; M. A. Baak; G. Raven; J. M. Losecco; T. A. Gabriel; B. Brau; T. Pulliam; J. Brau; R. Frey; M. Iwasaki; C. T. Potter; N. B. Sinev; D. Strom; E. Torrence; F. Colecchia; A. Dorigo; F. Galeazzi; M. Margoni; M. Morandin; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; G. Tiozzo; C. Voci; M. Benayoun; H. Briand; J. Chauveau; P. David; Ch. de La Vaissière; L. del Buono; O. Hamon; Ph. Leruste; J. Ocariz; M. Pivk; L. Roos; J. Stark; P. F. Manfredi; V. Re; L. Gladney; Q. H. Guo; J. Panetta; C. Angelini; G. Batignani; S. Bettarini; M. Bondioli

2003-01-01

135

Stacking interaction and its role in kynurenic acid binding to glutamate ionotropic receptors.  

PubMed

Stacking interaction is known to play an important role in protein folding, enzyme-substrate and ligand-receptor complex formation. It has been shown to make a contribution into the aromatic antagonists binding with glutamate ionotropic receptors (iGluRs), in particular, the complex of NMDA receptor NR1 subunit with the kynurenic acid (KYNA) derivatives. The specificity of KYNA binding to the glutamate receptors subtypes might partially result from the differences in stacking interaction. We have calculated the optimal geometry and binding energy of KYNA dimers with the four types of aromatic amino acid residues in Rattus and Drosophila ionotropic iGluR subunits. All ab initio quantum chemical calculations were performed taking into account electron correlations at MP2 and MP4 perturbation theory levels. We have also investigated the potential energy surfaces (PES) of stacking and hydrogen bonds (HBs) within the receptor binding site and calculated the free energy of the ligand-receptor complex formation. The energy of stacking interaction depends both on the size of aromatic moieties and the electrostatic effects. The distribution of charges was shown to determine the geometry of polar aromatic ring dimers. Presumably, stacking interaction is important at the first stage of ligand binding when HBs are weak. The freedom of ligand movements and rotation within receptor site provides the precise tuning of the HBs pattern, while the incorrect stacking binding prohibits the ligand-receptor complex formation. PMID:21833825

Zhuravlev, Alexander V; Zakharov, Gennady A; Shchegolev, Boris F; Savvateeva-Popova, Elena V

2011-08-12

136

Search for CP Violation in the Decays D0 to K- K+and D0 to pi- pi+  

SciTech Connect

We measure CP-violating asymmetries of neutral charmed mesons in the modes D{sup 0} {yields} K{sup -}K{sup +} and D{sup 0} {yields} {pi}{sup -}{pi}{sup +} with the highest precision to date by using D{sup 0} {yields} K{sup -}{pi}{sup +} decays to correct detector asymmetries. An analysis of 385.8 fb{sup -}1 of data collected with the BaBar detector yields values of a{sup KK}{sub CP} = (0.00 {+-} 0.34 (stat.) {+-} 0.13 (syst.))% and a{sup {pi}{pi}}{sub CP} = (-0.24 {+-} 0.52 (stat.) {+-} 0.22 (syst.))%, which agree with Standard Model predictions.

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. /INFN, Bari; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Abrams, G.S.; Battaglia, M.; Brown, D.N.; 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. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /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. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /Padua U. /INFN, Padua /Paris U., VI-VII /Pennsylvania U. /Perugia U. /INFN, Perugia /Pisa U. /Pisa, Scuola Normale Superiore /INFN, Pisa /Princeton U. /Rome 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. /INFN, Trieste /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison /Yale U.

2007-09-24

137

Observation of psi(3770) --> pi pi J/psi and measurement of Gamma ee[psi(2S)].  

PubMed

We observe signals for the decays psi(3770) --> XJ/psi from data acquired with the CLEO detector operating at the CESR e+ e- collider with square root of s = 3773 MeV. We measure the following branching fractions Beta(psi(3770) --> XJ/psi and significances: (189 +/- 20 +/- 20) x 10(-5) (11.6sigma) for X = pi+ pi-, (80 +/- 25 +/- 16) x 10(-5) (3.4sigma) for X = pi0 pi0, and (87 +/- 33 +/- 22) x 10(-5) (3.5sigma) for X = eta, where the errors are statistical and systematic, respectively. The radiative return process e+ e- --> gamma psi(2S) populates the same event sample and is used to measure Gamma ee[psi(2S)] = (2.54 +/- 0.03 +/- 0.11) keV. PMID:16606173

Adam, N E; Alexander, J P; Berkelman, K; Cassel, D G; Crede, V; Duboscq, J E; Ecklund, K M; Ehrlich, R; Fields, L; Galik, R S; Gibbons, L; Gittelman, B; Gray, R; Gray, S W; Hartill, D L; Heltsley, B K; Hertz, D; Jones, C D; Kandaswamy, J; Kreinick, D L; Kuznetsov, V E; Mahlke-Krüger, H; Meyer, T O; Onyisi, P U E; Patterson, J R; Peterson, D; Phillips, E A; Pivarski, J; Riley, D; Ryd, A; Sadoff, A J; Schwarthoff, H; Shi, X; Shepherd, M R; Stroiney, S; Sun, W M; Urner, D; Wilksen, T; Weaver, K M; Weinberger, M; Athar, S B; Avery, P; Breva-Newell, L; Patel, R; Potlia, V; Stoeck, H; Yelton, J; Rubin, P; Cawlfield, C; Eisenstein, B I; Gollin, G D; Karliner, I; Kim, D; Lowrey, N; Naik, P; Sedlack, C; Selen, M; White, E J; Williams, J; Wiss, J; Asner, D M; Edwards, K W; Besson, D; Pedlar, T K; Cronin-Hennessy, D; Gao, K Y; Gong, D T; Hietala, J; Kubota, Y; Klein, T; Lang, B W; Li, S Z; Poling, R; Scott, A W; Smith, A; Dobbs, S; Metreveli, Z; Seth, K K; Tomaradze, A; Zweber, P; Ernst, J; Severini, H; Dytman, S A; Love, W; Mehrabyan, S; Mueller, J A; Savinov, V; Li, Z; Lopez, A; Mendez, H; Ramirez, J; Huang, G S; Miller, D H; Pavlunin, V; Sanghi, B; Shipsey, I P J; Adams, G S; Anderson, M; Cummings, J P; Danko, I; Napolitano, J; He, Q; Muramatsu, H; Park, C S; Thorndike, E H; Coan, T E; Gao, Y S; Liu, F; Artuso, M; Boulahouache, C; Blusk, S; Butt, J; Dorjkhaidav, O; Li, J; Menaa, N; Mountain, R; Nandakumar, R; Randrianarivony, K; Redjimi, R; Sia, R; Skwarnicki, T; Stone, S; Wang, J C; Zhang, K; Csorna, S E; Bonvicini, G; Cinabro, D; Dubrovin, M; Briere, R A; Chen, G P; Chen, J; Ferguson, T; Tatishvili, G; Vogel, H; Watkins, M E; Rosner, J L

2006-03-03

138

Observation of a threshold enhancement in the reaction gammap-->K+K-pi+pi-p at gamma energies of 20-70 GeV  

Microsoft Academic Search

An analysis is presented of the channel gammap-->K+K-pi+pi-p. Evidence is found for a K+Kpi enhancement of mass ~1.9 GeV and width ~0.4 GeV. The spin-parity of the enhancement is consistent with being 1-.

D. Aston; M. Atkinson; R. Bailey; A. H. Ball; B. Bouquet; G. R. Brookes; J. Bröring; P. J. Bussey; D. Clarke; A. B. Clegg; B. D'Almagne; G. de Rosny; B. Diekmann; M. Draper; B. Drevillon; I. P. Duerdoth; J.-P. Dufey; R. J. Ellison; D. Ezra; P. Feller; A. Ferrer; P. J. Flynn; F. Friese; W. Galbraith; R. George; S. D. M. Gill; M. Goldberg; S. Goodman; W. Graves; B. Grossetête; P. G. Hampson; K. Heinloth; R. E. Hughes-Jones; J. S. Hutton; M. Ibbotson; M. Jung; S. Katsanevas; M. A. R. Kemp; F. Kovacs; B. R. Kumar; G. D. Lafferty; J.-M. Levy; V. Liebenau; J. Litt; D. Mercer; J. V. Morris; K. Müller; D. Newton; E. Paul; P. Petroff; Y. Pons; C. Raine; F. Richard; R. Richter; J. H. C. Roberts; P. Roudeau; A. Rougé; M. Rumpf; M. Sené; I. O. Skillicorn; J. C. Sleeman; K. M. Smith; C. Steinhauer; K. M. Storr; D. Treille; Ch. de La Vaissière; H. Videau; I. Videau; A. P. Waite; A. Wijangco; W. Wojcik; J.-P. Wuthrick; T. P. Yiou

1980-01-01

139

Influence of the ?-? interaction on the hydrogen bonding capacity of stacked DNA/RNA bases  

PubMed Central

The interplay between aromatic stacking and hydrogen bonding in nucleobases has been investigated via high-level quantum chemical calculations. The experimentally observed stacking arrangement between consecutive bases in DNA and RNA/DNA double helices is shown to enhance their hydrogen bonding ability as opposed to gas phase optimized complexes. This phenomenon results from more repulsive electrostatic interactions as is demonstrated in a model system of cytosine stacked offset-parallel with substituted benzenes. Therefore, the H-bonding capacity of the N3 and O2 atoms of cytosine increases linearly with the electrostatic repulsion between the stacked rings. The local hardness, a density functional theory-based reactivity descriptor, appears to be a key index associated with the molecular electrostatic potential (MEP) minima around H-bond accepting atoms, and is inversely proportional to the electrostatic interaction between stacked molecules. Finally, the MEP minima on surfaces around the bases in experimental structures of DNA and RNA–DNA double helices show that their hydrogen bonding capacity increases when taking more neighboring (intra-strand) stacking partners into account.

Mignon, Pierre; Loverix, Stefan; Steyaert, Jan; Geerlings, Paul

2005-01-01

140

Does the most stable formic acid tetramer have ? stacking or C-H...O interactions?  

NASA Astrophysics Data System (ADS)

Density functional theory (DFT), Møller-Plesset (MP) perturbation theory, and coupled-cluster calculations are used to examine low-energy minima on the potential energy surface of the formic acid tetramer (HCOOH)4. The potential energy surface is rather flat with respect to rotation of one of the dimers, relative to the other dimer in an aligned stack, about the axis passing through the inversion centers of the dimers. Our best calculations suggest that an aligned ?-? stack of two dimers is very likely to be the global minimum but there are two other ?-? stacks within 0.5 kcal/mol. Moreover, a fourth ?-? stack, a planar association of two dimers held together by C-H...O interactions, and a bowl structure all lie within 1 kcal/mol of the lowest-energy structure.

Karpfen, Alfred; Thakkar, Ajit J.

2006-06-01

141

Highly sensitive reduced graphene oxide impedance sensor harnessing ?-stacking interaction mediated direct deposition of protein probes.  

PubMed

Graphene-based electrochemical impedance sensors have recently received much attention due to their outstanding sensing capability and economic viability. In this study, we present a novel means of constructing an impedance sensing platform via harnessing intrinsic ?-stacking interactions between probe protein molecules and reduced graphene oxide (RGO) substrate, obviating the need for introducing external chemical groups often required for covalent anchoring of the probes. To achieve this goal, protein molecules used as a probe were denatured to render their hydrophobic residues exposed in order to facilitate their direct ?-stacking interactions with the surface of RGO nanosheets. The protein molecules in denatured form, which would otherwise have difficulty in undergoing ?-stacking interactions with the RGO surface, were found to uniformly cover the RGO nanosheets at high density, conducive to providing a graphene-based impedance sensing platform capable of detecting a probe-specific analyte at high sensitivity. The proof-of-concept performance of thus-constructed RGO-based impedance sensors was demonstrated via selective detection of biological binding events of antigen-antibody reaction at a femtomolar range. Notably, since the ?-stacking interaction can occur on the entire RGO surface, it can desirably exclude a backfill process indispensable for the conventional biosensors to suppress background noise signals. Since the procedure of ?-stacking mediated direct deposition of on-purpose denatured protein probes onto the RGO surface is facile and straightforward, the proposed strategy is anticipated to extend its applicability for fabrication of high performance graphene-based bio or chemical sensors. PMID:23551147

Kim, Kwang Su; Um, Yu Mi; Jang, Ji-Ryang; Choe, Woo-Seok; Yoo, Pil J

2013-04-17

142

Measurement of the E+ E- to Pi+ Pi- (Gamma) Cross Section with the ISR Method with BaBar  

SciTech Connect

A precision measurement of the cross section for the process e{sup +}e{sup -} {yields} {pi}{sup +}{pi}{sup -}({gamma}) is presented with the radiative return method with the high statistics data accumulated by BaBar at the {Upsilon}(4S). The luminosity is determined from the study of the corresponding leptonic process e{sup +}e{sup -} {yields} {mu}{sup +}{mu}{sup -}({gamma}), thus cancelling several factors and reducing the overall systematic uncertainty. Trigger, tracking, particle identification, and kinematic-fit {chi}{sup 2} efficiencies are evaluated from data in the same environment. Additional radiation from the initial and the final states is studied in both processes. The analysis covers the mass range between threshold and 5 GeV. Preliminary results are presented here between 0.5 and 3 GeV, with data samples of 513183 pion events and 445631 muon events. The systematic uncertainty in the main {rho} resonance region is 5.6 x 10{sup -3}. The measured mass dependent pion-pair cross section is compared with measurements from earlier experiments and used to compute the hadronic vacuum polarization contribution from the dominant {pi}{pi} channel to the muon magnetic anomaly.

Davier, Michel; /Orsay, LAL

2011-11-30

143

Dalitz plot analysis of the D+ ---> K- pi+ pi+ decay in the FOCUS experiment  

SciTech Connect

Using data collected by the high energy photoproduction experiment FOCUS at Fermilab we performed a Dalitz plot analysis of the Cabibbo favored decay D{sup +} {yields} K{sup -}{pi}{sup +}{pi}{sup +}. This study uses 53653 Dalitz-plot events with a signal fraction of {approx} 97%, and represents the highest statistics, most complete Dalitz plot analysis for this channel. Results are presented and discussed using two different formalisms. The first is a simple sum of Breit-Wigner functions with freely fitted masses and widths. It is the model traditionally adopted and serves as comparison with the already published analyses. The second uses a K-matrix approach for the dominant S-wave, in which the parameters are fixed by first fitting K{pi} scattering data and continued to threshold by Chiral Perturbation Theory. We show that the Dalitz plot distribution for this decay is consistent with the assumption of two body dominance of the final state interactions and the description of these interactions is in agreement with other data on the K{pi} final state.

Link, J.M.; Yager, P.M.; /UC, Davis; Anjos, J.C.; Bediaga, I.; Castromonte, C.; Machado, A.A.; Magnin, J.; Massafferri, A.; de Miranda, J.M.; Pepe, I.M.; Polycarpo, E.; /Rio de Janeiro, CBPF /CINVESTAV, IPN /Colorado U. /Fermilab /Frascati /Guanajuato U. /Illinois U., Urbana /Indiana U. /Korea U. /Kyungpook Natl. U.

2007-05-01

144

Study of B0-->pi0pi0, B±-->pi±pi0, and B±-->K±pi0 decays, and isospin analysis of B>pipi decays  

Microsoft Academic Search

We present updated measurements of the branching fractions and CP asymmetries for B0-->pi0pi0, B±-->pi±pi0, and B±-->K±pi0. Based on a sample of 383×106 Upsilon(4S)-->BB¯ decays collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC, we measure B(B0-->pi0pi0)=(1.47±0.25±0.12)×10-6, B(B±-->pi±pi0)=(5.02±0.46±0.29)×10-6, and B(B±-->K±pi0)=(13.6±0.6±0.7)×10-6. We also measure the CP asymmetries Cpi0pi0=-0.49±0.35±0.05, Api±pi0=0.03±0.08±0.01, and AK±pi0=0.030±0.039±0.010. Finally, we present bounds on the Cabibbo-Kobayashi-Maskawa

B. Aubert; M. Bona; D. Boutigny; 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; 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; I. L. Osipenkov; M. T. Ronan; K. Tackmann; T. Tanabe; W. A. Wenzel; P. Del Amo Sanchez; C. M. Hawkes; A. T. Watson; T. Held; H. Koch; M. Pelizaeus; T. Schroeder; M. Steinke; D. Walker; D. J. Asgeirsson; T. Cuhadar-Donszelmann; B. G. Fulsom; C. Hearty; T. S. Mattison; J. A. McKenna; A. Khan; 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; 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; S. D. Foulkes; J. W. Gary; F. Liu; O. Long; B. C. Shen; L. Zhang; 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; T. Schalk; B. A. Schumm; A. Seiden; M. G. Wilson; L. O. Winstrom; E. Chen; C. H. Cheng; 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; S. Chen; W. T. Ford; J. F. Hirschauer; A. Kreisel; M. Nagel; U. Nauenberg; A. Olivas; J. G. Smith; K. A. Ulmer; S. R. Wagner; J. Zhang; A. M. Gabareen; A. Soffer; W. H. Toki; R. J. Wilson; F. Winklmeier; 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; F. Muheim; S. Playfer; A. I. Robertson; J. E. Watson; Y. Xie; 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; J. Wu; R. S. Dubitzky; J. Marks; S. Schenk; U. Uwer; D. J. Bard; P. D. Dauncey; R. L. Flack; J. A. Nash; W. Panduro Vazquez; M. Tibbetts; P. K. Behera; X. Chai; M. J. Charles; U. Mallik; V. Ziegler; 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; G. Grosdidier; A. Höcker; V. Lepeltier; F. Le Diberder; A. M. Lutz; S. Pruvot; S. Rodier; P. Roudeau; M. H. Schune; J. Serrano; V. Sordini; A. Stocchi; W. F. Wang; G. Wormser; D. J. Lange; D. M. Wright; I. Bingham; C. A. Chavez; I. J. Forster; J. R. Fry; E. Gabathuler; R. Gamet; D. E. Hutchcroft; D. J. Payne; K. C. Schofield; C. Touramanis; A. J. Bevan; K. A. George; F. di Lodovico; W. Menges; R. Sacco; G. Cowan; H. U. Flaecher; D. A. Hopkins; S. Paramesvaran; 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; T. J. West; J. I. Yi; J. Anderson; C. Chen; A. Jawahery; D. A. Roberts; G. Simi; J. M. Tuggle; G. Blaylock; 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; S. J. Sekula; M. Spitznagel; F. Taylor; R. K. Yamamoto; M. Zhao; Y. Zheng; 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; F. Fabozzi; 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; 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; 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

2007-01-01

145

Scalar mesons in the decays {eta}' {sup {yields}}3{pi}{sup 0} and {eta}' {sup {yields} {pi}0{pi}+{pi}-}  

SciTech Connect

The decays {eta} {sup {yields}}3{pi}{sup 0} and {eta} {sup {yields} {pi}0{pi}+{pi}-} are considered within the isobar model. It is shown that, in order to explain the branching ratio and the shape of the Dalitz plot for the decay {eta}' {sup {yields}}3{pi}{sup 0}, it is sufficient to take into account the contributions of the {sigma} and a{sub 0} mesons. The inclusion of the {sigma} meson is necessary for reproducing the shape of the distribution over the Dalitz plot. The branching ratio for the decay {eta}' {sup {yields} {pi}0{pi}+{pi}-} is obtained. The predictions for the distributions over the Dalitz plot for this decay are presented. These predictions depend strongly on model parameters.

Likhoded, A. K., E-mail: Anatolii.Likhoded@ihep.ru; Luchinsky, A. V., E-mail: Alexey.Luchinsky@ihep.ru; Samoylenko, V. D. [Institute for High Energy Physics (Russian Federation)

2010-10-15

146

Nuclear structure of {sup 10}B studied with (e,e{prime}), ({pi},{pi}{prime}) and ({gamma},{pi}) reactions  

SciTech Connect

The authors studied nuclear structure of {sup 10}B using (e,e{prime}),({pi},{pi}{prime}) and ({gamma},{pi}) reactions under the distorted wave impulse approximation (DWIA). For this purpose the off-shell dependence of the amplitude was taken into account in the momentum space DWIA. They used the off-shell elementary amplitude of ({pi},{pi}) and ({gamma},{pi}) by the model of Nozawa, Blankleider and Lee. The first order core polarization effects were incorporated with the p-shell wave functions of Cohen and Kurath and Hauge and Maripuu. It was shown that the core-polarization effects greatly improve the agreement with the experimental data and that the simultaneous study of these reactions is useful to probe the spin structure of p-shell nuclei.

Sato, T.; Odagawa, N.; Ohtsubo, H. [Osaka Univ., Toyonaka (Japan). Dept. of Physics; Lee, T.S.H. [Argonne National Lab., IL (United States)

1994-05-01

147

Pi-Pi complexation of bupivacaine and analogues with aromatic receptors: Implications for overdose remediation  

PubMed Central

The interaction of the important but often overdosed local anesthetic bupivacaine, its structural analogs 2,6-dimethylaniline, and N-methyl-2,6-dimethylacetanilide, and cocaine, with several electron deficient aromatic moieties were studied primarily by proton NMR and UV-visible spectroscopy. In solution, the anesthetic, its analogs and cocaine are electron donors and form ?-? charge transfer complexes with strong aromatic acceptors, as monitored by the upfield changes induced in the NMR chemical shifts (?) and red-shifted UV-vis wavelength (?max) absorbance of the acceptors. The equilibrium binding constant, K, was determined from the 1H NMR charge transfer induced chemical shift changes and used to calculate the free energy (?G) for complex formation of three acceptor-donor pairs. HPLC results indicate that the concentrations of free bupivacaine, its analogs and of cocaine are reduced from solution via binding to aromatic-functionalized silica.

Powell, Evon; Lee, Y-H; Partch, Richard; Dennis, Donn; Morey, Timothy; Varshney, Manoj

2007-01-01

148

Coupled channels analysis of sup 12 C(. pi. ,. pi. ) at low energy  

SciTech Connect

Existing data for the 0{sub 2}{sup +} state in {sup 12}C at 50 and 67.5 MeV are compared with coupled channels calculations. Calculations are done with a realistic potential which includes the Lorentz-Lorenz-Ericson-Ericson {ital p}-wave correction and terms second order in the nuclear density. These are compared to results obtained using a phenomenological Kisslinger potential to investigate the sensitivity to the details of the {pi}{ital A} interaction. The suppression of the forward angle cross sections by the Lorentz-Lorenz-Ericson-Ericson effect is insufficient to bring the direct transition into agreement at both energies. The interference between the one- and two-step excitation mechanisms is required to reproduce the forward angle data. The dependence of the cross section on the choice of monopole transition density is examined.

Whisnant, C.S. (University of South Carolina, Department of Physics and Astronomy, Columbia, South Carolina 29208 (US))

1989-10-01

149

On Stacking  

NASA Astrophysics Data System (ADS)

The term 'stacking' is normally associated with ? - ? interactions between aromatic moieties. The parallel alignment between adjacent DNA bases arguably constitutes the best-known example and provides the dominating contribution to the overall stability of DNA duplexes. Beyond canonical ? - ? interactions, a preliminary inspection of crystal structures of nucleic acids and their complexes with proteins reveals a wealth of additional stacking motifs including edge-to-face, H - ? , cation-?, lone pair-? and anion-? interactions. Given the ubiquity and diversity of such motifs it seems reasonable to widen the meaning of stacking beyond the standard cofacial interactions between pairs of aromatics.

Egli, Martin

150

On Stacking  

NASA Astrophysics Data System (ADS)

The term ‘stacking' is normally associated with ? - ? interactions between aromatic moieties. The parallel alignment between adjacent DNA bases arguably constitutes the best-known example and provides the dominating contribution to the overall stability of DNA duplexes. Beyond canonical ? - ? interactions, a preliminary inspection of crystal structures of nucleic acids and their complexes with proteins reveals a wealth of additional stacking motifs including edge-to-face, H - ? , cation-?, lone pair-? and anion-? interactions. Given the ubiquity and diversity of such motifs it seems reasonable to widen the meaning of stacking beyond the standard cofacial interactions between pairs of aromatics.

Egli, Martin

151

Measurements of branching fraction ratios and CP-asymmetries in suppressed B>D(-->K+pi-)K- and B>D(-->K+pi-)pi- decays  

Microsoft Academic Search

We report the first reconstruction in hadron collisions of the suppressed decays B--->D(-->K+pi-)K- and B--->D(-->K+pi-)pi-, sensitive to the Cabibbo-Kobayashi-Maskawa phase gamma, using data from 7fb-1 of integrated luminosity collected by the CDF II detector at the Tevatron collider. We reconstruct a signal for the B--->D(-->K+pi-)K- suppressed mode with a significance of 3.2 standard deviations, and measure the ratios of the

T. Aaltonen; B. Álvarez González; S. Amerio; D. Amidei; A. Anastassov; A. Annovi; J. Antos; G. Apollinari; J. A. Appel; A. Apresyan; T. Arisawa; A. Artikov; J. Asaadi; W. Ashmanskas; B. Auerbach; A. Aurisano; F. Azfar; W. Badgett; A. Barbaro-Galtieri; V. E. Barnes; B. A. Barnett; P. Barria; P. Bartos; M. Bauce; G. Bauer; F. Bedeschi; D. Beecher; S. Behari; G. Bellettini; J. Bellinger; D. Benjamin; A. Beretvas; A. Bhatti; M. Binkley; D. Bisello; I. Bizjak; K. R. Bland; B. Blumenfeld; A. Bocci; A. Bodek; D. Bortoletto; J. Boudreau; A. Boveia; L. Brigliadori; A. Brisuda; C. Bromberg; E. Brucken; M. Bucciantonio; J. Budagov; H. S. Budd; S. Budd; K. Burkett; G. Busetto; P. Bussey; A. Buzatu; C. Calancha; S. Camarda; M. Campanelli; M. Campbell; F. Canelli; B. Carls; D. Carlsmith; R. Carosi; S. Carrillo; S. Carron; 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; F. Chlebana; K. Cho; D. Chokheli; J. P. Chou; W. H. Chung; Y. S. Chung; C. I. Ciobanu; M. A. Ciocci; A. Clark; C. Clarke; G. Compostella; M. E. Convery; J. Conway; M. Corbo; M. Cordelli; C. A. Cox; D. J. Cox; F. Crescioli; C. Cuenca Almenar; J. Cuevas; R. Culbertson; D. Dagenhart; N. D'Ascenzo; M. Datta; P. de Barbaro; S. de Cecco; G. de Lorenzo; M. Dell'Orso; C. Deluca; L. Demortier; J. Deng; M. Deninno; F. Devoto; M. D'Errico; A. di Canto; B. di Ruzza; J. R. Dittmann; M. D'Onofrio; S. Donati; P. Dong; M. Dorigo; T. Dorigo; K. Ebina; A. Elagin; A. Eppig; R. Erbacher; D. Errede; S. Errede; N. Ershaidat; R. Eusebi; H. C. Fang; S. Farrington; M. Feindt; J. P. Fernandez; C. Ferrazza; R. Field; G. Flanagan; R. Forrest; M. J. Frank; M. Franklin; J. C. Freeman; Y. Funakoshi; I. Furic; M. Gallinaro; J. Galyardt; J. E. Garcia; A. F. Garfinkel; P. Garosi; H. Gerberich; E. Gerchtein; S. Giagu; V. Giakoumopoulou; P. Giannetti; K. Gibson; C. M. Ginsburg; N. Giokaris; P. Giromini; M. Giunta; G. Giurgiu; V. Glagolev; D. Glenzinski; M. Gold; D. Goldin; N. Goldschmidt; A. Golossanov; G. Gomez; G. Gomez-Ceballos; M. Goncharov; O. González; I. Gorelov; A. T. Goshaw; K. Goulianos; S. Grinstein; C. Grosso-Pilcher; J. Guimaraes da Costa; Z. Gunay-Unalan; C. Haber; S. R. Hahn; E. Halkiadakis; A. Hamaguchi; J. Y. Han; F. Happacher; K. Hara; D. Hare; M. Hare; R. F. Harr; K. Hatakeyama; C. Hays; M. Heck; J. Heinrich; M. Herndon; S. Hewamanage; D. Hidas; A. Hocker; W. Hopkins; D. Horn; S. Hou; R. E. Hughes; M. Hurwitz; U. Husemann; N. Hussain; M. Hussein; J. Huston; G. Introzzi; M. Iori; A. Ivanov; E. James; D. Jang; B. Jayatilaka; E. J. Jeon; M. K. Jha; S. Jindariani; W. Johnson; M. Jones; K. K. Joo; S. Y. Jun; T. R. Junk; T. Kamon; P. E. Karchin; A. Kasmi; Y. Kato; W. Ketchum; J. Keung; V. Khotilovich; B. Kilminster; D. H. Kim; H. S. Kim; H. W. Kim; J. E. Kim; M. J. Kim; S. B. Kim; S. H. Kim; Y. K. Kim; N. Kimura; M. Kirby; S. Klimenko; K. Kondo; D. J. Kong; J. Konigsberg; A. V. Kotwal; M. Kreps; J. Kroll; D. Krop; N. Krumnack; M. Kruse; V. Krutelyov; T. Kuhr; M. Kurata; S. Kwang; A. T. Laasanen; S. Lami; S. Lammel; M. Lancaster; R. L. Lander; K. Lannon; A. Lath; G. Latino; T. Lecompte; E. Lee; H. S. Lee; J. S. Lee; S. W. Lee; S. Leo; S. Leone; J. D. Lewis; A. Limosani; C.-J. Lin; J. Linacre; M. Lindgren; E. Lipeles; A. Lister; D. O. Litvintsev; C. Liu; Q. Liu; T. Liu; S. Lockwitz; A. Loginov; D. Lucchesi; J. Lueck; P. Lujan; P. Lukens; G. Lungu; J. Lys; R. Lysak; R. Madrak; K. Maeshima; K. Makhoul; S. Malik; G. Manca; A. Manousakis-Katsikakis; F. Margaroli; C. Marino; M. Martínez; R. Martínez-Ballarín; P. Mastrandrea; M. E. Mattson; P. Mazzanti; K. S. McFarland; P. McIntyre; R. McNulty; A. Mehta; P. Mehtala; A. Menzione; C. Mesropian; T. Miao; D. Mietlicki; A. Mitra; H. Miyake; S. Moed; N. Moggi; M. N. Mondragon; C. S. Moon; R. Moore; M. J. Morello; J. Morlock; P. Movilla Fernandez; A. Mukherjee; Th. Muller; P. Murat; M. Mussini; J. Nachtman; Y. Nagai; J. Naganoma; I. Nakano; A. Napier; J. Nett; C. Neu; M. S. Neubauer; J. Nielsen; L. Nodulman; O. Norniella; E. Nurse; L. Oakes; S. H. Oh; Y. D. Oh; I. Oksuzian; T. Okusawa; R. Orava; L. Ortolan; S. Pagan Griso; C. Pagliarone; E. Palencia; V. Papadimitriou; A. A. Paramonov; J. Patrick; G. Pauletta; M. Paulini; C. Paus; D. E. Pellett; A. Penzo; T. J. Phillips; G. Piacentino; E. Pianori; J. Pilot; K. Pitts; C. Plager; L. Pondrom; S. Poprocki; K. Potamianos; O. Poukhov; F. Prokoshin; A. Pronko; F. Ptohos; E. Pueschel; G. Punzi; J. Pursley; A. Rahaman; V. Ramakrishnan; N. Ranjan; I. Redondo; P. Renton; M. Rescigno; T. Riddick; F. Rimondi; L. Ristori; A. Robson; T. Rodrigo; T. Rodriguez; E. Rogers; S. Rolli; R. Roser; M. Rossi; F. Rubbo; F. Ruffini; A. Ruiz; J. Russ; V. Rusu; A. Safonov; W. K. Sakumoto; Y. Sakurai; L. Santi; L. Sartori; K. Sato; V. Saveliev; A. Savoy-Navarro; P. Schlabach; A. Schmidt

2011-01-01

152

Observation of a pbar p mass threshold enhancement in Psi' --> pi+pi- J\\/Psi(J\\/Psi --> gamma pbar p) decay  

Microsoft Academic Search

The decay channel Psi' --> pi+pi- J\\/Psi(J\\/Psi --> gammapbar p) is studied using a sample of 1.06 × 108 Psi' events collected by the BESIII experiment at BEPCII. A strong enhancement at threshold is observed in the pbar p invariant mass spectrum. The enhancement can be fitted with an S-wave Breit-Wigner resonance function with a resulting peak mass of M

M. Ablikim; M. N. Achasov; L. An; Q. An; Z. H. An; J. Z. Bai; Y. Ban; N. Berger; J. M. Bian; I. Boyko; R. A. Briere; V. Bytev; X. Cai; G. F. Cao; X. X. Cao; J. F. Chang; G. Chelkov; G. Chen; H. S. Chen; J. C. Chen; L. P. Chen; M. L. Chen; P. Chen; S. J. Chen; Y. B. Chen; Y. P. Chu; D. Cronin-Hennessy; H. L. Dai; J. P. Dai; D. Dedovich; Z. Y. Deng; I. Denysenko; M. Destefanis; Y. Ding; L. Y. Dong; M. Y. Dong; S. X. Du; M. Y. Duan; J. Fang; C. Q. Feng; C. D. Fu; J. L. Fu; Y. Gao; C. Geng; K. Goetzen; W. X. Gong; M. Greco; S. Grishin; Y. T. Gu; A. Q. Guo; L. B. Guo; Y. P. Guo; S. Q. Han; F. A. Harris; K. L. He; M. He; Z. Y. He; Y. K. Heng; Z. L. Hou; H. M. Hu; J. F. Hu; T. Hu; X. W. Hu; B. Huang; G. M. Huang; J. S. Huang; X. T. Huang; Y. P. Huang; C. S. Ji; Q. Ji; X. B. Ji; X. L. Ji; L. K. Jia; L. L. Jiang; X. S. Jiang; J. B. Jiao; D. P. Jin; S. Jin; S. Komamiya; W. Kuehn; S. Lange; J. K. C. Leung; C. Li; D. M. Li; F. Li; G. Li; H. B. Li; Lik J; J. C. Li; L. Li; Q. J. Li; W. D. Li; W. G. Li; X. L. Li; X. N. Li; X. Q. Li; X. R. Li; Y. X. Li; Z. B. Li; H. Liang; T. R. Liang; Y. Y. Liang; Y. F. Liang; G. R. Liao; X. T. Liao; B. J. Liu; C. L. Liu; C. Y. Liu; F. H. Liu; G. C. Liu; H. Liu; H. M. Liu; H. W. Liu; J. Liu; K. Liu; Q. Liu; S. B. Liu; X. H. Liu; Y. B. Liu; Y. F. Liu; Y. W. Liu; Z. A. Liu; G. R. Lu; J. G. Lü; Q. W. Lü; X. R. Lü; Y. P. Lu; C. L. Luo; M. X. Luo; T. Luo; X. L. Luo; C. L. Ma; F. C. Ma; H. L. Ma; Q. M. Ma; X. Ma; M. Maggiora; Y. J. Mao; Z. P. Mao; J. Min; X. H. Mo; N. Yu. Muchnoi; Y. Nefedov; F. P. Ning; S. L. Olsen; Q. Ouyang; M. Pelizaeus; K. Peters; J. L. Ping; R. G. Ping; R. Poling; C. S. J. Pun; M. Qi; S. Qian; C. F. Qiao; J. F. Qiu; G. Rong; X. D. Ruan; A. Sarantsev; M. Shao; C. P. Shen; X. Y. Shen; H. Y. Sheng; S. Sonoda; S. Spataro; B. Spruck; D. H. Sun; G. X. Sun; J. F. Sun; S. S. Sun; X. D. Sun; Y. J. Sun; Y. Z. Sun; Z. J. Sun; Z. T. Sun; C. J. Tang; X. Tang; H. L. Tian; D. Toth; G. S. Varner; X. Wan; B. Q. Wang; J. K. Wang; K. Wang; L. L. Wang; L. S. Wang; P. Wang; Q. Wang; S. G. Wang; X. D. Wang; X. L. Wang; Y. D. Wang; Y. F. Wang; Z. Wang; Z. Y. Wang; D. H. Wei; S. P. Wen; U. Wiedner; L. H. Wu; N. Wu; Y. M. Wu; Z. Wu; Z. J. Xiao; Y. G. Xie; G. F. Xu; G. M. Xu; H. Xu; M. Xu; X. P. Xu; Y. Xu; Z. Z. Xu; Z. Xue; L. Yan; W. B. Yan; Y. H. Yan; H. X. Yang; M. Yang; P. Yang; S. M. Yang; Y. X. Yang; M. Ye; B. X. Yu; C. X. Yu; L. Yu; C. Z. Yuan; Y. Yuan; Y. Zeng; B. X. Zhang; C. C. Zhang; D. H. Zhang; H. H. Zhang; H. Y. Zhang; J. W. Zhang; J. Y. Zhang; J. Z. Zhang; L. Zhang; S. H. Zhang; X. Y. Zhang; Y. Zhang; Z. P. Zhang; C. Zhao; H. S. Zhao; J. W. Zhao; L. Zhao; M. G. Zhao; Q. Zhao; S. J. Zhao; T. C. Zhao; X. H. Zhao; Y. B. Zhao; Z. G. Zhao; A. Zhemchugov; B. Zheng; J. P. Zheng; Y. H. Zheng; Z. P. Zheng; B. Zhong; J. Zhong; L. Zhou; Z. L. Zhou; C. Zhu; K. Zhu; Q. M. Zhu; X. W. Zhu; Y. S. Zhu; Z. A. Zhu; J. Zhuang; B. S. Zou; J. H. Zou; J. X. Zuo; P. Zweber

2010-01-01

153

Vibrational Spectra and Structure of Coumaran and Its Ring-Puckering Potential Energy Functions in the S0 and S1(pi,pi*) Electronic States  

Microsoft Academic Search

The far-infrared (IR), jet-cooled fluorescence excitation (FES), single vibronic level fluorescence (SVLF), and ultraviolet (UV) absorption spectra of coumaran have been recorded and analyzed. The assignment of those spectra has allowed a detailed energy map of both the S0 and S1(pi,pi*) electronic states of the ring-puckering (nu45) vibration to be determined. A one-dimensional potential energy function for the ring-puckering vibration

Juan Yang; Martin Wagner; Katsuhiko Okuyama; Jaan Laane

2006-01-01

154

Spectroscopic Studies and Ab Initio Calculations of 1,3-Benzodioxan in its S0 and S1(pi,pi*) Electronic States  

Microsoft Academic Search

Both the ground (S0) and excited [S1(pi,pi*)] states of 1,3-benzodioxan have been studied using molecular spectroscopy and theoretical calculations. Infrared, Raman, ultraviolet absorption, and laser-induced fluorescence (LIF) spectroscopies of the jet-cooled molecules were used to create energy maps for the vibrational and vibronic levels of the molecule, especially for the low-frequency vibrational modes which help to elucidate the conformational energetics

Kathleen McCann; Jaebum Choo; Martin Wagner; Jaan Laane

2006-01-01

155

Face-to-face stacks of trinuclear gold(I) trihalides with benzene, hexafluorobenzene, and borazine: impact of aromaticity on stacking interactions.  

PubMed

The interplay of electrostatics, charge transfer, and dispersion forces contributing to the interaction energies in 1:1, 1:2, and 2:1 binary stacks of the c-Au(3)(?(2)-X)(3) (X = F, Cl, Br, I) clusters with benzene, hexafluorobenzene, or borazine were investigated by employing a multitude of electronic structure computational techniques. The molecular and electronic structures, stabilities, bonding features, and magnetotropicity of [c-Au(3)(?(2)-X)(3)](n)(L)(m) (X = halide; L = C(6)H(6), C(6)F(6), B(3)N(3)H(6); n, m ? 2) columnar binary stacks have been investigated by DFT calculations employing the M05-2X functional. The novel binary stacks could be considered as the building blocks of extended columnar supramolecular assemblies formulated as {[c-Au(3)(?(2)-X)(3)](C(6)H(6))}(?), {[c-Au(3)(?(2)-X)(3)](2)(C(6)F(6))}(?), and {[c-Au(3)(?(2)-X)(3)](B(3)N(3)H(6))(2)}(?). In all binary stacks, with a few exceptions, the plane of the alternating c-Au(3)(?(2)-X)(3) and L (C(6)H(6), C(6)F(6), B(3)N(3)H(6)) stacking participants adopt an almost parallel face-to-face (pff) orientation. The observed trends in the intermolecular distances R in the [c-Au(3)(?(2)-X)(3)](n)(L)(m) (X = halide; L = C(6)H(6), C(6)F(6), B(3)N(3)H(6); n, m ? 2) columnar binary stacks are explained by the diverse intermolecular interactions characterizing the stacks, since the three ligands L and the c-Au(3)(?(2)-X)(3) cyclic trinuclear clusters (CTCs) exhibit diverse physical properties being important determinants of the intermolecular interactions (consisting of covalent, electrostatic, and dispersion forces). The properties considered are the zz tensor components of quadrupole moment, Q(zz), polarizability, ?(zz), nucleus-independent chemical shift, NICS(zz)(1), along with the molecular electrostatic potential, MEP(0), and surface area (S). Energy decomposition analysis (EDA) at the revPBE-D3/TZ2P level revealed that the dominant term in the stacking interactions arises mainly from dispersion and electrostatic forces, while the contribution of covalent interactions are predicted to be small. On the other hand, charge decomposition analysis (CDA) illustrated very small charge transfer from the L stacking participants toward the c-Au(3)(?(2)-X)(3) clusters. Excellent linear correlations of the interaction energy, ?E(int), and its components (?E(disp), ?E(elstat), ?E(orb), and ?E(Pauli)) with calculated physical properties related to dispersion, covalent, and electrostatic forces have been established. The most important finding is the excellent linear relationship between ?E(int) and the NICS(zz)(1) magnetic criterion of aromaticity, indicating that ?E(int) is also affected by the coupling of the induced magnetic fields of the interacting stacking participants. The magnetotropicity of the binary stacks evaluated by the NICS(zz)-scan curves indicated an enhancement of the diatropicity in the space between the interacting inorganic and organic rings, probably due to the superposition of the diamagnetic ring currents of the interacting ring systems. The energy splitting in dimer (ESID) model was employed to estimate the charge transport of electrons and holes between the ligands L and the [c-Au(3)(?(2)-X)(3)] clusters in [c-Au(3)(?(2)-X)(3)](L) 1:1 binary stacks. PMID:23270385

Tsipis, Athanassios C; Stalikas, Alexandros V

2012-12-27

156

Dynamics of dislocation interactions with stacking-fault tetrahedra at high temperature  

NASA Astrophysics Data System (ADS)

The interaction process between dislocations and large stacking-fault tetrahedra was observed in real time at high temperature during deformation experiments in situ in the transmission electron microscope. Dislocation interactions with tetrahedra resulted in them being annihilated and converted to another defect type. Dislocation bypass of the tetrahedra occurred by cross-slip. The latter interaction occurred slowly and halted the progress of the dislocation. Annihilation versus bypass by dislocation cross-slip was dictated by the location at which the slip plane intersected the tetrahedron – on the face or along the edges with the stair-rod dislocations. In general, the interactions, at best, were weakly temperature dependent.

Briceño, M.; Kacher, J.; Robertson, I. M.

2013-02-01

157

Closing the lid on DNA end-to-end stacking interactions  

SciTech Connect

Recent experiments suggest that short DNA strands associate by end-to-end stacking. Here, we report interactions between DNAs with modified ends. DNA duplexes, 20 bp long, were capped with short T{sub 4} loops at 2, 1 or 0 ends, and were placed in solutions containing 20 mM Mg{sup 2+}. Association was observed only in constructs with one or more uncapped ends. DNA-DNA interactions were characterized by measuring variations in small angle x-ray scattering (SAXS) curves at the lowest scattering angles. Second virial coefficients were computed from the SAXS data. Our results confirm that end-to-end stacking plays an important role in short strand DNA-DNA interactions.

Li Li; Pabit, Suzette A.; Lamb, Jessica S.; Park, Hye Yoon; Pollack, Lois [School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853 (United States)

2008-06-02

158

2-Aminopurine fluorescence studies of base stacking interactions at abasic sites in DNA: metal-ion and base sequence effects.  

PubMed Central

Metal-ion and sequence dependent changes in the stacking interactions of bases surrounding abasic (AB) sites in 10 different DNA duplexes were examined by incorporating the fluorescent nucleotide probe 2-aminopurine (2-AP), opposite to the site (AB-APopp) or adjacent to the site (AB-APadj) on either strand. A detailed study of the fluorescence emission and excitation spectra of these AB duplexes and their corresponding parent duplexes indicates that AB-APoppis significantly less stacked than 2-AP in the corresponding normal duplex. In general, AB-APadjon the AB strand is stacked, but AB-APadjon the opposite strand shows destabilized stacking interactions. The results also indicate that divalent cation binding to the AB duplexes contributes to destabilizaton of the base stacking interactions of AB-APopp, but has little or no effect on the stacking interactions of AB-APadj. Consistent with these results, the fluorescence of AB-APoppis 18-30-fold more sensitive to an externally added quenching agent than the parent normal duplex. When uracil DNA glycosylase binds to AB-APoppin the presence of 2.5 mM MgCl2, a 3-fold decrease in fluorescence is observed ( K d = 400 +/- 90 nM) indicating that the unstacked 2-APoppbecomes more stacked upon binding. On the basis of these fluorescence studies a model for the local base stacking interactions at these AB sites is proposed.

Stivers, J T

1998-01-01

159

Bending and Base-Stacking Interactions in Double-Stranded DNA  

NASA Astrophysics Data System (ADS)

An elastic model for double-stranded biopolymers is constructed to study the recently observed DNA entropic elasticity, cooperative extensibility, and super-coiling property. With the introduction of a new structural parameter (the folding angle), bending deformations of sugar-phosphate backbones, steric effects of nucleotide base pairs, and base-stacking interactions are considered to derive the equation governing the evolution of the Green function, which determines the probability distribution of the deformations. By numerically solving this equation we find a comprehensive agreement between theory and experiments in the force-extension relation of DNA and th base-stacking interaction is believed to dominate its elasticity. With the model the deformation of a supercoiled DNA is also studied by Metropolis Monte Carlo simulation and shows the same striking coincidence between theoretical prediction and experimental observations of Strick et al. (Science 271 (1996) 1835; Biophys. J. 74 (1998) 2016).

Zhou, Haijun; Zhang, Yang; Ou-Yang, Zhong-Can

2001-04-01

160

Stack zooming for multifocus interaction in skewed-aspect visual spaces.  

PubMed

Many 2D visual spaces have a virtually one-dimensional nature with very high aspect ratio between the dimensions: examples include time-series data, multimedia data such as sound or video, text documents, and bipartite graphs. Common among these is that the space can become very large, e.g., temperature measurements could span a long time period, surveillance video could cover entire days or weeks, and documents can have thousands of pages. Many analysis tasks for such spaces require several foci while retaining context and distance awareness. In this extended version of our IEEE PacificVis 2010 paper, we introduce a method for supporting this kind of multifocus interaction that we call stack zooming. The approach is based on building hierarchies of 1D strips stacked on top of each other, where each subsequent stack represents a higher zoom level, and sibling strips represent branches in the exploration. Correlation graphics show the relation between stacks and strips of different levels, providing context and distance awareness for the foci. The zoom hierarchies can also be used as graphical histories and for communicating insights to stakeholders and can be further extended with annotation and integrated statistics. PMID:23744266

Javed, Waqas; Elmqvist, Niklas

2013-08-01

161

Nonwater Quality Impacts of Closed-Cycle Cooling Systems and the Interaction of Stack Gas and Cooling Tower Plumes.  

National Technical Information Service (NTIS)

The report gives results of a literature survey of the nonwater quality impacts of closed-cycle cooling systems. Following discussions of cooling tower and stack gas plumes, interactions of these plumes are considered. For cooling tower plumes, plume type...

G. A. Englesson M. C. Hu

1979-01-01

162

Measurement of D0-D¯0 Mixing Parameters Using D0-->KS0pi+pi- and D0-->KS0K+K- Decays  

Microsoft Academic Search

We report a direct measurement of D0-D¯0 mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D0-->KS0pi+pi- and, for the first time, D0-->KS0K+K- decays. The low-momentum pion pis+ in the decay D*+-->D0pis+ identifies the flavor of the neutral D meson at its production. Using 468.5fb-1 of e+e- colliding-beam data recorded near s=10.6GeV by the BABAR detector at

P. Del Amo Sanchez; 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; A. T. Watson; H. Koch; T. Schroeder; D. J. Asgeirsson; C. Hearty; T. S. Mattison; J. A. McKenna; 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; M. Mandelkern; E. C. Martin; D. P. Stoker; H. Atmacan; J. W. Gary; F. Liu; O. Long; G. M. Vitug; 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; 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; 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; C. L. Lee; 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; A. Perez; 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. P. Coleman; 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; R. Cenci; A. Jawahery; D. A. Roberts; G. Simi; J. M. Tuggle; C. Dallapiccola; E. Salvati; R. Cowan; D. Dujmic; P. H. Fisher; G. Sciolla; M. Zhao; D. Lindemann; 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; N. L. Blount; J. Brau; R. Frey; O. Igonkina; J. A. Kolb; R. Rahmat; N. B. Sinev; D. Strom; J. Strube; E. Torrence; G. Castelli; E. Feltresi; N. Gagliardi; M. Margoni; M. Morandin; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; E. Ben-Haim; G. R. Bonneaud; H. Briand; G. Calderini; J. Chauveau; O. Hamon; Ph. Leruste; G. Marchiori; J. Ocariz; J. Prendki; S. Sitt; M. Biasini; E. Manoni; C. Angelini; G. Batignani; S. Bettarini; M. Carpinelli; G. Casarosa; 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; 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; I. J. R. Aitchison; M. T. Allen; D. Aston; D. J. Bard; R. Bartoldus; J. F. Benitez; C. Cartaro; M. R. Convery; 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; 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; D. R. Muller; H. Neal; S. Nelson; C. P. O'Grady; I. Ofte; M. Perl; T. Pulliam; B. N. Ratcliff; A. Roodman; A. A. Salnikov; V. Santoro; R. H. Schindler; J. Schwiening; A. Snyder; D. Su; M. K. Sullivan; S. Sun; K. Suzuki; J. M. Thompson

2010-01-01

163

Double Dalitz plot analysis of the decay B{sup 0{yields}}DK{sup +{pi}-}, D{yields}K{sub S}{sup 0{pi}+{pi}-}  

SciTech Connect

It is shown that it is possible to perform a model-independent extraction of the Cabibbo-Kobayashi-Maskawa unitarity triangle angle {gamma} using only the decays B{sup 0{yields}}DK{sup +{pi}-} with D{yields}K{sub S}{sup 0{pi}+{pi}-} and B{sup 0{yields}}DK{sup +{pi}-} with flavor-specific D decays. The proposed method can also utilize the B{sup 0{yields}}DK{sup +{pi}-} data with CP-eigenstate decays of the D meson in a model-independent way.

Gershon, Tim [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Poluektov, Anton [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Budker Institute of Nuclear Physics, 11 Lavrentieva, Novosibirsk, 630090 (Russian Federation)

2010-01-01

164

Search for D0-D¯0 Mixing and Branching-Ratio Measurement in the Decay D0-->K+pi-pi0  

Microsoft Academic Search

We analyze 230.4fb-1 of data collected with the BABAR detector at the PEP-II e+e- collider at SLAC to search for evidence of D0-D¯0 mixing using regions of phase space in the decay D0-->K+pi-pi0. We measure the time-integrated mixing rate RM=(0.023-0.014+0.018(stat.)±0.004(syst.))%, and RM<0.054% at the 95% confidence level, assuming CP invariance. The data are consistent with no mixing at the 4.5%

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; 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; 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; S. E. Morgan; 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; 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; 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; F. Fang; D. G. Hitlin; I. Narsky; T. Piatenko; F. C. Porter; A. Ryd; A. Samuel; 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; 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; P. Grenier; 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. 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; 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; 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; G. Cowan; H. U. Flaecher; D. A. Hopkins; P. D. Jackson; T. R. McMahon; S. Ricciardi; 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. Baak; 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; A. M. Rahimi; R. Ter-Antonyan; Q. K. Wong; N. L. Blount; J. Brau; R. Frey; O. Igonkina; M. Lu; R. Rahmat; N. B. Sinev; D. Strom; J. Strube

2006-01-01

165

Limits on D0-D¯0 Mixing and CP Violation from the Ratio of Lifetimes for Decay to K-pi+, K-K+, and pi-pi+  

Microsoft Academic Search

We present a measurement of D0-D¯0 mixing parameters using the ratios of lifetimes extracted from samples of D0 mesons decaying to K-pi+, K-K+, and pi-pi+. Using 91 fb-1 of data collected by the BABAR detector at the PEP-II asymmetric-energy B Factory, we obtain a value Y=[0.8±0.4(stat.)+0.5\\/-0.4(syst.)]%, which, in the limit of CP conservation, corresponds to the mixing parameter y=DeltaGamma\\/2Gamma. Using

B. Aubert; R. Barate; D. Boutigny; J.-M. Gaillard; A. Hicheur; Y. Karyotakis; J. P. Lees; P. Robbe; V. Tisserand; A. Zghiche; 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. 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; J. F. Kral; G. Kukartsev; C. Leclerc; M. E. Levi; G. Lynch; L. M. Mir; P. J. Oddone; T. J. Orimoto; M. Pripstein; N. A. Roe; A. Romosan; M. T. Ronan; V. G. Shelkov; A. V. Telnov; W. A. Wenzel; K. Ford; T. J. Harrison; C. M. Hawkes; D. J. Knowles; S. E. Morgan; R. C. Penny; A. T. Watson; N. K. Watson; T. Deppermann; K. Goetzen; H. Koch; B. Lewandowski; M. Pelizaeus; K. Peters; H. Schmuecker; M. Steinke; N. R. Barlow; J. T. Boyd; N. Chevalier; W. N. Cottingham; M. P. Kelly; T. E. Latham; C. Mackay; F. F. Wilson; K. Abe; T. Cuhadar-Donszelmann; C. Hearty; T. S. Mattison; J. A. McKenna; D. Thiessen; P. Kyberd; A. K. McKemey; V. E. Blinov; A. D. Bukin; 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. Chao; D. Kirkby; A. J. Lankford; M. Mandelkern; S. McMahon; R. K. Mommsen; W. Roethel; D. P. Stoker; C. Buchanan; D. del Re; H. K. Hadavand; E. J. Hill; D. B. Macfarlane; H. P. Paar; Sh. Rahatlou; U. Schwanke; V. Sharma; J. W. Berryhill; C. Campagnari; B. Dahmes; N. Kuznetsova; S. L. Levy; O. Long; A. Lu; M. A. Mazur; J. D. Richman; W. Verkerke; T. W. Beck; J. Beringer; A. M. Eisner; M. Grothe; C. A. Heusch; W. S. Lockman; T. Schalk; R. E. Schmitz; B. A. Schumm; A. Seiden; M. Turri; W. Walkowiak; D. C. Williams; M. G. Wilson; J. Albert; E. Chen; G. P. Dubois-Felsmann; A. Dvoretskii; D. G. Hitlin; I. Narsky; F. C. Porter; A. Ryd; A. Samuel; S. Yang; S. Jayatilleke; G. Mancinelli; B. T. Meadows; M. D. Sokoloff; T. Abe; T. Barillari; F. Blanc; P. Bloom; P. J. Clark; W. T. Ford; U. Nauenberg; A. Olivas; P. Rankin; J. Roy; J. G. Smith; W. C. van Hoek; L. Zhang; J. L. Harton; T. Hu; A. Soffer; W. H. Toki; R. J. Wilson; J. Zhang; D. Altenburg; T. Brandt; J. Brose; T. Colberg; M. Dickopp; R. S. Dubitzky; A. Hauke; H. M. Lacker; E. Maly; R. Müller-Pfefferkorn; R. Nogowski; S. Otto; K. R. Schubert; R. Schwierz; B. Spaan; L. Wilden; D. Bernard; G. R. Bonneaud; F. Brochard; J. Cohen-Tanugi; Ch. Thiebaux; G. Vasileiadis; M. Verderi; A. Khan; D. Lavin; F. Muheim; S. Playfer; J. E. Swain; J. Tinslay; M. Andreotti; D. Bettoni; C. Bozzi; R. Calabrese; G. Cibinetto; E. Luppi; M. Negrini; L. Piemontese; A. Sarti; E. Treadwell; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; D. Falciai; G. Finocchiaro; P. Patteri; I. M. Peruzzi; M. Piccolo; A. Zallo; A. Buzzo; R. Contri; G. Crosetti; M. Lo Vetere; M. Macri; M. R. Monge; S. Passaggio; F. C. Pastore; C. Patrignani; E. Robutti; A. Santroni; S. Tosi; S. Bailey; M. Morii; M. L. Aspinwall; W. Bhimji; D. A. Bowerman; P. D. Dauncey; U. Egede; I. Eschrich; G. W. Morton; J. A. Nash; P. Sanders; G. P. Taylor; G. J. Grenier; S.-J. Lee; U. Mallik; J. Cochran; H. B. Crawley; J. Lamsa; W. T. Meyer; S. Prell; E. I. Rosenberg; J. Yi; M. Davier; G. Grosdidier; A. Höcker; S. Laplace; F. Le Diberder; V. Lepeltier; A. M. Lutz; T. C. Petersen; S. Plaszczynski; M. H. Schune; L. Tantot; G. Wormser; V. Brigljevic; C. H. Cheng; D. J. Lange; D. M. Wright; A. J. Bevan; J. P. Coleman; J. R. Fry; E. Gabathuler; R. Gamet; M. Kay; R. J. Parry; D. J. Payne; R. J. Sloane; C. Touramanis; J. J. Back; P. F. Harrison; H. W. Shorthouse; P. Strother; P. B. Vidal; C. L. Brown; G. Cowan; R. L. Flack; H. U. Flaecher; S. George; M. G. Green; A. Kurup; C. E. Marker; T. R. McMahon; S. Ricciardi; F. Salvatore; G. Vaitsas; M. A. Winter; C. L. Davis; J. Allison; R. J. Barlow; A. C. Forti; P. A. Hart; F. Jackson; G. D. Lafferty; A. J. Lyon; J. H. Weatherall; J. C. Williams; A. Farbin; A. Jawahery; D. Kovalskyi; C. K. Lae; V. Lillard; D. A. Roberts; G. Blaylock; C. Dallapiccola; K. T. Flood; S. S. Hertzbach; R. Kofler; V. B. Koptchev; T. B. Moore; S. Saremi; H. Staengle; S. Willocq; R. Cowan; G. Sciolla; F. Taylor; R. K. Yamamoto; D. J. Mangeol; M. Milek; P. M. Patel; A. Lazzaro; F. Palombo; J. M. Bauer; L. Cremaldi; V. Eschenburg; R. Godang; R. Kroeger; J. Reidy; D. A. Sanders; D. J. Summers; H. W. Zhao; C. Hast; P. Taras; H. Nicholson; C. Cartaro; N. Cavallo; G. De Nardo; F. Fabozzi; C. Gatto; L. Lista; P. Paolucci; D. Piccolo; C. Sciacca; M. A. Baak; G. Raven; J. M. Losecco; T. A. Gabriel; B. Brau; T. Pulliam; J. Brau; R. Frey; C. T. Potter; N. B. Sinev; D. Strom; E. Torrence; F. Colecchia; A. Dorigo; F. Galeazzi; M. Margoni; M. Morandin; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; G. Tiozzo; C. Voci; M. Benayoun; H. Briand

2003-01-01

166

Measurements of branching fractions and CP-violating asymmetries in B0-->pi+pi-, K+pi-, K+K- decays.  

PubMed

We present measurements of branching fractions and CP-violating asymmetries for two-body neutral B meson decays to charged pions and kaons based on a sample of about 88x10(6) Upsilon(4S)-->BB decays. From a time-independent fit we measure the charge-averaged branching fractions B(B0-->pi+pi-)=(4.7+/-0.6+/-0.2)x10(-6), B(B0-->K+pi-)=(17.9+/-0.9+/-0.7)x10(-6), and the direct CP-violating charge asymmetry A(Kpi)=-0.102+/-0.050+/-0.016 [-0.188,-0.016], where the ranges in square brackets indicate the 90% confidence intervals. From a time-dependent fit we measure the B0-->pi+pi- CP-violating parameters S(pipi)=0.02+/-0.34+/-0.05 [-0.54,+0.58] and C(pipi)=-0.30+/-0.25+/-0.04 [-0.72,+0.12]. PMID:12513134

Aubert, B; Boutigny, D; Gaillard, J-M; Hicheur, A; Karyotakis, Y; Lees, J P; Robbe, 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; Gill, M S; Gritsan, A V; Groysman, Y; Jacobsen, R G; Kadel, R W; Kadyk, J; Kerth, L T; Kolomensky, Yu G; Kral, J F; LeClerc, C; Levi, M E; Lynch, G; Mir, L M; Oddone, P J; Orimoto, T J; Pripstein, M; Roe, N A; Romosan, A; Ronan, M T; Shelkov, V G; Telnov, A V; Wenzel, W A; Harrison, T J; Hawkes, C M; Knowles, D J; O'Neale, S W; Penny, R C; Watson, A T; Watson, N K; Deppermann, T; Goetzen, K; Koch, H; Lewandowski, B; Peters, K; Schmuecker, H; Steinke, M; Barlow, N R; Bhimji, W; Boyd, J T; Chevalier, N; Clark, P J; Cottingham, W N; Mackay, C; Wilson, F F; Abe, K; Hearty, C; Mattison, T S; McKenna, J A; Thiessen, D; Jolly, S; McKemey, A K; Blinov, V E; Bukin, A D; Buzykaev, A R; Golubev, V B; Ivanchenko, V N; Korol, A A; Kravchenko, E A; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Yushkov, A N; Best, D; Chao, M; Kirkby, D; Lankford, A J; Mandelkern, M; McMahon, S; Stoker, D P; Buchanan, C; Chun, S; Hadavand, H K; Hill, E J; MacFarlane, D B; Paar, H; Prell, S; Rahatlou, Sh; Raven, G; Schwanke, U; Sharma, V; Berryhill, J W; Campagnari, C; Dahmes, B; Hart, P A; Kuznetsova, N; Levy, S L; Long, O; Lu, A; Mazur, M A; Richman, J D; Verkerke, W; Beringer, J; Eisner, A M; Grothe, M; Heusch, C A; Lockman, W S; Pulliam, T; Schalk, T; Schmitz, R E; Schumm, B A; Seiden, A; Turri, M; Walkowiak, W; Williams, D C; Wilson, M G; Chen, E; Dubois-Felsmann, G P; Dvoretskii, A; Hitlin, D G; Porter, F C; Ryd, A; Samuel, A; Yang, S; Jayatilleke, S; Mancinelli, G; Meadows, B T; Sokoloff, M D; Barillari, T; Bloom, P; Ford, W T; Nauenberg, U; Olivas, A; Rankin, P; Roy, J; Smith, J G; van Hoek, W C; Zhang, L; Harton, J L; Hu, T; Krishnamurthy, M; Soffer, A; Toki, W H; Wilson, R J; Zhang, J; Altenburg, D; Brandt, T; Brose, J; Colberg, T; Dickopp, M; Dubitzky, R S; Hauke, A; Maly, E; Müller-Pfefferkorn, R; Otto, S; Schubert, K R; Schwierz, R; Spaan, B; Wilden, L; Bernard, D; Bonneaud, G R; Brochard, F; Cohen-Tanugi, J; Ferrag, S; T'Jampens, S; Thiebaux, Ch; Vasileiadis, G; Verderi, M; Anjomshoaa, A; Bernet, R; Khan, A; Lavin, D; Muheim, F; Playfer, S; Swain, J E; Tinslay, J; Falbo, M; Borean, C; Bozzi, C; Piemontese, L; Sarti, A; Treadwell, E; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; de Sangro, R; Falciai, D; Finocchiaro, G; Patteri, P; Peruzzi, I M; Piccolo, M; Zallo, A; Bagnasco, S; Buzzo, A; Contri, R; Crosetti, G; Lo Vetere, M; Macri, M; Monge, M R; Passaggio, S; Pastore, F C; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Bailey, S; Morii, M; Bartoldus, R; Grenier, G J; Mallik, U; Cochran, J; Crawley, H B; Lamsa, J; Meyer, W T; Rosenberg, E I; Yi, J; Davier, M; Grosdidier, G; Höcker, A; Lacker, H M; Laplace, S; Le Diberder, F; Lepeltier, V; Lutz, A M; Petersen, T C; Plaszczynski, S; Schune, M H; Tantot, L; Trincaz-Duvoid, S; Wormser, G; Bionta, R M; Brigljevi?, V; Lange, D J; van Bibber, K; Wright, D M; Bevan, A J; Fry, J R; Gabathuler, E; Gamet, R; George, M; Kay, M; Payne, D J; Sloane, R J; Touramanis, C; Aspinwall, M L; Bowerman, D A; Dauncey, P D; Egede, U; Eschrich, I; Morton, G W; Nash, J A; Sanders, P; Smith, D; Taylor, G P; Back, J J; Bellodi, G; Dixon, P; Harrison, P F; Potter, R J L; Shorthouse, H W; Strother, P; Vidal, P B; Cowan, G; Flaecher, H U; George, S; Green, M G; Kurup, A; Marker, C E; McMahon, T R; Ricciardi, S; Salvatore, F; Vaitsas, G; Winter, M A; Brown, D; Davis, C L; Allison, J; Barlow, R J; Forti, A C; Jackson, F; Lafferty, G D; Lyon, A J; Savvas, N; Weatherall, J H; Williams, J C; Farbin, A; Jawahery, A; Lillard, V; Roberts, D A; Schieck, J R; Blaylock, G; Dallapiccola, C; Flood, K T; Hertzbach, S S; Kofler, R; Koptchev, V B; Moore, T B; Staengle, H; Willocq, S; Brau, B; Cowan, R; Sciolla, G; Taylor, F; Yamamoto, R K; Milek, M; Patel, P M; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Kroeger, R; Reidy, J; Sanders, D A; Summers, D J; Hast, C; Taras, P; Nicholson, H; Cartaro, C; Cavallo, N; De Nardo, G; Fabozzi, F; Gatto, C; Lista, L; Paolucci, P; Piccolo, D; Sciacca, C; LoSecco, J M; Alsmiller, J R G; Gabriel, T A; Brau, J; Frey, R; Iwasaki, M; 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; Voci, C; Benayoun, M; Briand, H; Chauveau, J; David, P; de la Vaissière, Ch; Del Buono, L; Hamon, O; Leruste, Ph; Ocariz, J; Pivk, M; Roos, L; Stark, J; Manfredi, P F; Re, V; Speziali, V; Gladney, L; Guo, Q H; Panetta, J; Angelini, C; Batignani, G; Bettarini, S; Bondioli, M; Bucci, F; Calderini, G; Campagna, E; Carpinelli, M; Forti, F; Giorgi, M A; Lusiani, A

2002-12-31

167

Observation of the decay B+/--->pi+/-pi0, study of B+/--->K+/-pi0, and search for B0-->pi0pi0.  

PubMed

We present results for the branching fractions and charge asymmetries in B+/--->h(+/-)pi(0) (where h(+/-)=pi(+/-),K+/-) and a search for the decay B0-->pi(0)pi(0) using a sample of approximately 88 x 10(6) BBmacr; pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure B(B+/--->pi(+/-)pi(0))=(5.5(+1.0)(-0.9)+/-0.6)x10(-6), where the first error is statistical and the second is systematic. The B+/--->pi(+/-)pi(0) signal has a significance of 7.7sigma including systematic uncertainties. We simultaneously measure the K+/-pi(0) branching fraction to be B(B+/--->K+/-pi(0))=(12.8(+1.2)(-1.1)+/-1.0)x10(-6). The charge asymmetries are Api(+/-)(pi(0))=-0.03(+0.18)(-0.17)+/-0.02 and AK+/-(pi(0))=-0.09+/-0.09+/-0.01. We place a 90% confidence-level upper limit on the branching fraction B(B0-->pi(0)pi(0)) of 3.6 x 10(-6). PMID:12906470

Aubert, B; Barate, R; Boutigny, D; Gaillard, J-M; Hicheur, A; Karyotakis, Y; Lees, J P; Robbe, 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; Gill, M S; Gritsan, A V; Groysman, Y; Jacobsen, R G; Kadel, R W; Kadyk, J; Kerth, L T; Kolomensky, Yu G; Kral, J F; Kukartsev, G; LeClerc, C; Levi, M E; Lynch, G; Mir, L M; Oddone, P J; Orimoto, T J; Pripstein, M; Roe, N A; Romosan, A; Ronan, M T; Shelkov, V G; Telnov, A V; Wenzel, W A; Harrison, T J; Hawkes, C M; Knowles, D J; Penny, R C; Watson, A T; Watson, N K; Deppermann, T; Goetzen, K; Koch, H; Lewandowski, B; Pelizaeus, M; Peters, K; Schmuecker, H; Steinke, M; Barlow, N R; Bhimji, W; Boyd, J T; Chevalier, N; Clark, P J; Cottingham, W N; Mackay, C; Wilson, F F; Hearty, C; Mattison, T S; McKenna, J A; Thiessen, D; Kyberd, P; McKemey, A K; Blinov, V E; Bukin, A D; 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; Chao, M; Kirkby, D; Lankford, A J; Mandelkern, M; McMahon, S; Mommsen, R K; Roethel, W; Stoker, D P; Buchanan, C; Hadavand, H K; Hill, E J; MacFarlane, D B; Paar, H P; Rahatlou, Sh; Schwanke, U; Sharma, V; Berryhill, J W; Campagnari, C; Dahmes, B; Kuznetsova, N; Levy, S L; Long, O; Lu, A; Mazur, M A; Richman, J D; Verkerke, W; Beringer, J; Eisner, A M; Heusch, C A; Lockman, W S; Schalk, T; Schmitz, R E; Schumm, B A; Seiden, A; Turri, M; Walkowiak, W; Williams, D C; Wilson, M G; Albert, J; Chen, E; Dubois-Felsmann, G P; Dvoretskii, A; Hitlin, D G; Narsky, I; Porter, F C; Ryd, A; Samuel, A; Yang, S; Jayatilleke, S; Mancinelli, G; Meadows, B T; Sokoloff, M D; Barillari, T; Blanc, F; Bloom, P; Ford, W T; Nauenberg, U; Olivas, A; Rankin, P; Roy, J; Smith, J G; Van Hoek, W C; Zhang, L; Harton, J L; Hu, T; Soffer, A; Toki, W H; Wilson, R J; Zhang, J; Altenburg, D; Brandt, T; Brose, J; Colberg, T; Dickopp, M; Dubitzky, R S; Hauke, A; Lacker, H M; Maly, E; Müller-Pfefferkorn, R; Nogowski, R; Otto, S; Schubert, K R; Schwierz, R; Spaan, B; Wilden, L; Bernard, D; Bonneaud, G R; Brochard, F; Cohen-Tanugi, J; T'Jampens, S; Thiebaux, Ch; Vasileiadis, G; Verderi, M; Bernet, R; Khan, A; Lavin, D; Muheim, F; Playfer, S; Swain, J E; Tinslay, J; Borean, C; Bozzi, C; Piemontese, L; Sarti, A; Treadwell, E; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; De Sangro, R; Falciai, D; Finocchiaro, G; Patteri, P; Peruzzi, I M; Piccolo, M; Zallo, A; Buzzo, A; Contri, R; Crosetti, G; Lo Vetere, M; Macri, M; Monge, M R; Passaggio, S; Pastore, F C; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Bailey, S; Morii, M; Grenier, G J; Lee, S-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; Bionta, R M; Brigljevi?, V; Cheng, C H; Lange, D J; Wright, D M; Bevan, A J; Fry, J R; Gabathuler, E; Gamet, R; Kay, M; Payne, D J; Sloane, R J; Touramanis, C; Aspinwall, M L; Bowerman, D A; Dauncey, P D; Egede, U; Eschrich, I; Morton, G W; Nash, J A; Sanders, P; Taylor, G P; Back, J J; Bellodi, G; Harrison, P F; Shorthouse, H W; Strother, P; Vidal, P B; Cowan, G; Flaecher, H U; George, S; Green, M G; Kurup, A; Marker, C E; McMahon, T R; Ricciardi, S; Salvatore, F; Vaitsas, G; Winter, M A; Brown, D; Davis, C L; Allison, J; Barlow, R J; Forti, A C; Hart, P A; Jackson, F; Lafferty, G D; Lyon, A J; Weatherall, J H; Williams, J C; Farbin, A; 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; Staengle, H; Willocq, S; Cowan, R; Sciolla, G; Taylor, F; Yamamoto, R K; Mangeol, D J J; Milek, M; Patel, P M; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Kroeger, R; Reidy, J; Sanders, D A; Summers, D J; Zhao, H W; Hast, C; Taras, P; Nicholson, H; Cartaro, C; Cavallo, N; De Nardo, G; Fabozzi, F; Gatto, C; Lista, L; Paolucci, P; Piccolo, D; Sciacca, C; Baak, M A; Raven, G; LoSecco, J M; Gabriel, T A; Brau, B; Pulliam, T; Brau, J; Frey, R; Iwasaki, M; 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; Hamon, O; Leruste, Ph; Ocariz, J; Pivk, M; Roos, L; Stark, J; Manfredi, P F; Re, V; Gladney, L; Guo, Q H; Panetta, J; Angelini, C; Batignani, G; Bettarini, S; Bondioli, M; Bucci, F; Calderini, G; Carpinelli, M; Forti, F; Giorgi, M A; Lusiani, A; Marchiori, G; Martinez-Vidal, F; Morganti, M; Neri, N; Paoloni, E; Rama, M; Rizzo, G

2003-07-07

168

Measurement of D^0-\\bar{D^0} Mixing From a Time-Dependent Amplitude Analysis of D^0\\ -> K^+\\pi^-\\pi0 Decays  

SciTech Connect

The authors present evidence of D{sup 0}-{bar D}{sup 0} mixing using a time-dependent amplitude analysis of the decay D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} in a data sample of 384 fb{sup -1} collected with the BABAR detector at the PEP-II e{sup +}e{sup -} collider at SLAC. Assuming CP conservation, they measure the mixing parameters x{prime}{sub K{pi}{pi}{sup 0}} = [2.61{sub -0.68}{sup +0.57}(stat.) {+-} 0.39(syst.)]%, y{prime}{sub K{pi}{pi}{sup 0}} = [-0.06{sub -0.64}{sup +0.55}(stat.) {+-} 0.34(syst.)]%. The confidence level for the data to be consistent with the no-mixing hypothesis is 0.1%, including systematic uncertainties. This result is inconsistent with the no-mixing hypothesis with a significance of 3.2 standard deviations. They find no evidence of CP violation in mixing.

Aubert, Bernard; Bona, M.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Lopez, L.; Palano, Antimo; Pappagallo, M.; /Bari U. /INFN, Bari; Eigen, G.; Stugu, Bjarne; Sun, L.; /Bergen U.; Abrams, G.S.; Battaglia, M.; Brown, D.N.; Cahn, Robert N.; Jacobsen, R.G.; /LBL, 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. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /Harvard U. /Heidelberg U. /Humboldt U., Berlin /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 /McGill U. /Consorzio Milano Ricerche /INFN, Milan /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /Napoli Seconda U. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /Padua U. /INFN, Padua /Paris U., VI-VII /Pennsylvania U. /Perugia U. /INFN, Perugia /INFN, Pisa /Princeton U. /Banca di Roma /Frascati /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. /INFN, Trieste /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

2008-08-04

169

Extracting drug-drug interaction from the biomedical literature using a stacked generalization-based approach.  

PubMed

Drug-drug interaction (DDI) detection is particularly important for patient safety. However, the amount of biomedical literature regarding drug interactions is increasing rapidly. Therefore, there is a need to develop an effective approach for the automatic extraction of DDI information from the biomedical literature. In this paper, we present a Stacked Generalization-based approach for automatic DDI extraction. The approach combines the feature-based, graph and tree kernels and, therefore, reduces the risk of missing important features. In addition, it introduces some domain knowledge based features (the keyword, semantic type, and DrugBank features) into the feature-based kernel, which contribute to the performance improvement. More specifically, the approach applies Stacked generalization to automatically learn the weights from the training data and assign them to three individual kernels to achieve a much better performance than each individual kernel. The experimental results show that our approach can achieve a better performance of 69.24% in F-score compared with other systems in the DDI Extraction 2011 challenge task. PMID:23785452

He, Linna; Yang, Zhihao; Zhao, Zhehuan; Lin, Hongfei; Li, Yanpeng

2013-06-13

170

Extracting Drug-Drug Interaction from the Biomedical Literature Using a Stacked Generalization-Based Approach  

PubMed Central

Drug-drug interaction (DDI) detection is particularly important for patient safety. However, the amount of biomedical literature regarding drug interactions is increasing rapidly. Therefore, there is a need to develop an effective approach for the automatic extraction of DDI information from the biomedical literature. In this paper, we present a Stacked Generalization-based approach for automatic DDI extraction. The approach combines the feature-based, graph and tree kernels and, therefore, reduces the risk of missing important features. In addition, it introduces some domain knowledge based features (the keyword, semantic type, and DrugBank features) into the feature-based kernel, which contribute to the performance improvement. More specifically, the approach applies Stacked generalization to automatically learn the weights from the training data and assign them to three individual kernels to achieve a much better performance than each individual kernel. The experimental results show that our approach can achieve a better performance of 69.24% in F-score compared with other systems in the DDI Extraction 2011 challenge task.

He, Linna; Yang, Zhihao; Zhao, Zhehuan; Lin, Hongfei; Li, Yanpeng

2013-01-01

171

Determining the photon polarization of the b{yields}s{gamma} using the B{yields}K{sub 1}(1270){gamma}{yields}(K{pi}{pi}){gamma} decay  

SciTech Connect

Recently the radiative B decay to the strange axial-vector mesons, B{yields}K{sub 1}(1270){gamma}, has been observed with a rather large branching ratio. This process is particularly interesting as the subsequent K{sub 1} decay into its three-body final state allows us to determine the polarization of the photon, which is mostly left- (right-)handed for B(B) in the SM while various new physics models predict additional right- (left-)handed components. A new method is proposed to determine the polarization, exploiting the full Dalitz plot distribution, which seems to reduce significantly the statistical errors. This polarization measurement requires, however, detailed knowledge of the K{sub 1{yields}}K{pi}{pi} strong interaction decays, namely, the various partial wave amplitudes into the several possible quasi-two-body channels, as well as their relative phases. The pattern of partial waves is especially complex for the K{sub 1}(1270). We attempt to obtain the information through the combination of an experimental input and a theoretical one, provided by the {sup 3}P{sub 0} quark-pair-creation model.

Kou, E. [Laboratoire de l'Accelerateur Lineaire, Universite Paris-Sud 11, CNRS/IN2P3 (UMR 8607) 91405 Orsay (France); Le Yaouanc, A. [Laboratoire de Physique Theorique, CNRS/Universite Paris-Sud 11, (UMR 8627) 91405 Orsay (France); Tayduganov, A. [Laboratoire de l'Accelerateur Lineaire, Universite Paris-Sud 11, CNRS/IN2P3 (UMR 8607) 91405 Orsay (France); Laboratoire de Physique Theorique, CNRS/Universite Paris-Sud 11, (UMR 8627) 91405 Orsay (France)

2011-05-01

172

Evidence of ?-stacking interactions in the self-assembly of hIAPP(22-29).  

PubMed

The role aromatic amino acids play in the formation of amyloid is a subject of controversy. In an effort to clarify the contribution of aromaticity to the self-assembly of human islet amyloid polypeptide (hIAPP)22-29 , peptide analogs containing electron donating groups (EDGs) or electron withdrawing groups (EWGs) as substituents on the aromatic ring of Phe-23 at the para position have been synthesized and characterized using turbidity measurements in conjunction with Raman and fluorescence spectroscopy. Results indicate the incorporation of EDGs on the aromatic ring of Phe-23 virtually abolish the ability of hIAPP22-29 to form amyloid. Peptides containing EWGs were still capable of forming aggregates. These aggregates were found to be rich in ?-sheet secondary structure. Transmission electron microscopy images of the aggregates confirm the presence of amyloid fibrils. The observed difference in amyloidogenic propensity between peptides containing EDGs and those with EWGs appears not to be based on differences in peptide hydrophobicity. Fluorescence and Raman spectroscopic investigations reveal that the environment surrounding the aromatic ring becomes more hydrophobic and ordered upon aggregation. Furthermore, Raman measurements of peptide analogs containing EWGs, conclusively demonstrate a distinct downshift in the ?C?C? ring mode (ca. 1600 cm(-1) ) upon aggregation that has previously been shown to be indicative of ?-stacking. While previous work has demonstrated that ?-stacking is not an absolute requirement for fibrillization, our findings indicate that Phe-23 also contributes to fibril formation through ?-stacking interactions and that it is not only the hydrophobic nature of this residue that is relevant in the self-assembly of hIAPP22-29 . © Proteins 2013. © 2012 Wiley Periodicals, Inc. PMID:23229921

Profit, Adam A; Felsen, Valentina; Chinwong, Justina; Mojica, Elmer-Rico E; Desamero, Ruel Z B

2013-01-15

173

Measurement of the tau--->etapi-pi+pi-nutau branching fraction and a search for a second-class current in the tau--->eta'(958)pi-nutau decay  

Microsoft Academic Search

The tau--->etapi-pi+pi-nutau decay with the eta-->gammagamma mode is studied using 384fb-1 of data collected by the BABAR detector. The branching fraction is measured to be (1.60±0.05±0.11)×10-4. It is found that tau--->f1(1285)pi-nutau-->etapi-pi+pi-nutau is the dominant decay mode with a branching fraction of (1.11±0.06±0.05)×10-4. The first error on the branching fractions is statistical and the second systematic. Note that no particle identification

B. Aubert; M. Bona; D. Boutigny; 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; David Nathan Brown; J. Button-Shafer; R. N. Cahn; 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; I. L. Osipenkov; M. T. Ronan; K. Tackmann; T. Tanabe; W. A. Wenzel; P. Del Amo Sanchez; C. M. Hawkes; 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; A. Khan; 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; 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; 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; T. Schalk; B. A. Schumm; A. Seiden; M. G. Wilson; L. O. Winstrom; E. Chen; C. H. Cheng; 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; S. Chen; W. T. Ford; J. F. Hirschauer; A. Kreisel; M. Nagel; U. Nauenberg; A. Olivas; J. G. Smith; K. A. Ulmer; S. R. Wagner; J. Zhang; A. M. Gabareen; A. Soffer; W. H. Toki; R. J. Wilson; F. Winklmeier; 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; F. Muheim; S. Playfer; A. I. Robertson; J. E. Watson; Y. Xie; 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; J. Wu; R. S. Dubitzky; J. Marks; S. Schenk; U. Uwer; D. J. Bard; P. D. Dauncey; R. L. Flack; 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; G. Grosdidier; A. Höcker; V. Lepeltier; F. Le Diberder; A. M. Lutz; S. Pruvot; S. Rodier; P. Roudeau; M. H. Schune; J. Serrano; V. Sordini; A. Stocchi; L. Wang; 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; K. C. Schofield; C. Touramanis; A. J. Bevan; K. A. George; F. di Lodovico; R. Sacco; M. Sigamani; G. Cowan; H. U. Flaecher; D. A. Hopkins; S. Paramesvaran; 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; 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; Y. Zheng; 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; F. Fabozzi; 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; 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

2008-01-01

174

Branching fraction measurements of charged B decays to K*+K+K-, K*+pi+K-, K*+K+pi- and K*+pi+pi- final states  

Microsoft Academic Search

Branching fraction and asymmetry measurements of charmless B+-->K*+h1+h2- (where h1,2=K, pi) decays are presented, using a data sample of 232×106 Upsilon(4S)-->BB¯ decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy B factory. Using a maximum likelihood fit, the following branching fraction results were obtained: B(B+-->K*+K+K-)=(36.2±3.3±3.6)×10-6 and B(B+-->K*+pi+pi-)=(75.3±6.0±8.1)×10-6. Upper limits were set for B(B+-->K*+pi+K-)<11.8×10-6 and B(B+-->K*+K+pi-)<6.1×10-6 at 90% confidence

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; 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; 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; S. E. Morgan; 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; 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; 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; F. Fang; D. G. Hitlin; I. Narsky; T. Piatenko; F. C. Porter; A. Ryd; A. Samuel; 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; 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; P. Grenier; 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. 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. 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; 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; G. Cowan; H. U. Flaecher; D. A. Hopkins; P. D. Jackson; T. R. McMahon; S. Ricciardi; 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. Baak; 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; A. M. Rahimi; R. Ter-Antonyan; Q. K. Wong; N. L. Blount; J. Brau; R. Frey; O. Igonkina; M. Lu; R. Rahmat; N. B. Sinev; D. Strom; J. Strube; E. Torrence; A. Gaz

2006-01-01

175

Limits on D0-macro D0 mixing and CP violation from the ratio of lifetimes for decay to K-pi+, K-K+, and pi- pi+.  

PubMed

We present a measurement of D0-macro D0 mixing parameters using the ratios of lifetimes extracted from samples of D0 mesons decaying to K-pi(+), K-K+, and pi(-)pi(+). Using 91 fb(-1) of data collected by the BABAR detector at the PEP-II asymmetric-energy B Factory, we obtain a value Y=[0.8+/-0.4(stat.)(+0.5)(-0.4)(syst.)]%, which, in the limit of CP conservation, corresponds to the mixing parameter y=Delta Gamma/2 Gamma. Using the difference in lifetimes of D0 and macro D0 mesons, we obtain the CP-violation parameter Delta Y=[-0.8+/-0.6(stat.)+/-0.2(syst.)]%. PMID:14525353

Aubert, B; Barate, R; Boutigny, D; Gaillard, J-M; Hicheur, A; Karyotakis, Y; Lees, J P; Robbe, 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; Kral, J F; Kukartsev, G; LeClerc, C; Levi, M E; Lynch, G; Mir, L M; Oddone, P J; Orimoto, T J; Pripstein, M; Roe, N A; Romosan, A; Ronan, M T; Shelkov, V G; Telnov, A V; Wenzel, W A; Ford, K; Harrison, T J; Hawkes, C M; Knowles, D J; Morgan, S E; Penny, R C; Watson, A T; Watson, N K; Deppermann, T; Goetzen, K; Koch, H; Lewandowski, B; Pelizaeus, M; Peters, K; Schmuecker, H; Steinke, M; Barlow, N R; Boyd, J T; Chevalier, N; Cottingham, W N; Kelly, M P; Latham, T E; Mackay, C; Wilson, F F; Abe, K; Cuhadar-Donszelmann, T; Hearty, C; Mattison, T S; McKenna, J A; Thiessen, D; Kyberd, P; McKemey, A K; Blinov, V E; Bukin, A D; 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; Chao, M; Kirkby, D; Lankford, A J; Mandelkern, M; McMahon, S; Mommsen, R K; Roethel, W; Stoker, D P; Buchanan, C; del Re, D; Hadavand, H K; Hill, E J; MacFarlane, D B; Paar, H P; Rahatlou, Sh; Schwanke, U; Sharma, V; Berryhill, J W; Campagnari, C; Dahmes, B; Kuznetsova, N; Levy, S L; Long, O; Lu, A; Mazur, M A; Richman, J D; Verkerke, W; Beck, T W; Beringer, J; Eisner, A M; Grothe, M; Heusch, C A; Lockman, W S; Schalk, T; Schmitz, R E; Schumm, B A; Seiden, A; Turri, M; Walkowiak, W; Williams, D C; Wilson, M G; Albert, J; Chen, E; Dubois-Felsmann, G P; Dvoretskii, A; Hitlin, D G; Narsky, I; Porter, F C; Ryd, A; Samuel, A; Yang, S; Jayatilleke, S; Mancinelli, G; Meadows, B T; Sokoloff, M D; Abe, T; Barillari, T; Blanc, F; Bloom, P; Clark, P J; Ford, W T; Nauenberg, U; Olivas, A; Rankin, P; Roy, J; Smith, J G; van Hoek, W C; Zhang, L; Harton, J L; Hu, T; Soffer, A; Toki, W H; Wilson, R J; Zhang, J; Altenburg, D; Brandt, T; Brose, J; Colberg, T; Dickopp, M; Dubitzky, R S; Hauke, A; Lacker, H M; Maly, E; Müller-Pfefferkorn, R; Nogowski, R; Otto, S; Schubert, K R; Schwierz, R; Spaan, B; Wilden, L; Bernard, D; Bonneaud, G R; Brochard, F; Cohen-Tanugi, J; Thiebaux, Ch; Vasileiadis, G; Verderi, M; Khan, A; Lavin, D; Muheim, F; Playfer, S; Swain, J E; Tinslay, J; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Luppi, E; Negrini, M; Piemontese, L; Sarti, A; Treadwell, E; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; de Sangro, R; Falciai, D; Finocchiaro, G; Patteri, P; Peruzzi, I M; Piccolo, M; Zallo, A; Buzzo, A; Contri, R; Crosetti, G; Lo Vetere, M; Macri, M; Monge, M R; Passaggio, S; Pastore, F C; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Bailey, S; Morii, M; Aspinwall, M L; Bhimji, W; Bowerman, D A; Dauncey, P D; Egede, U; Eschrich, I; Morton, G W; Nash, J A; Sanders, P; Taylor, G P; Grenier, G J; Lee, S-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; Brigljevi?, V; Cheng, C H; Lange, D J; Wright, D M; Bevan, A J; Coleman, J P; Fry, J R; Gabathuler, E; Gamet, R; Kay, M; Parry, R J; Payne, D J; Sloane, R J; Touramanis, C; Back, J J; Harrison, P F; Shorthouse, H W; Strother, P; Vidal, P B; Brown, C L; Cowan, G; Flack, R L; Flaecher, H U; George, S; Green, M G; Kurup, A; Marker, C E; McMahon, T R; Ricciardi, S; Salvatore, F; Vaitsas, G; Winter, M A; Brown, D; Davis, C L; Allison, J; Barlow, R J; Forti, A C; Hart, P A; Jackson, F; Lafferty, G D; Lyon, A J; Weatherall, J H; Williams, J C; Farbin, A; 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; Milek, M; Patel, P M; 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; Hast, C; Taras, P; Nicholson, H; Cartaro, C; Cavallo, N; De Nardo, G; Fabozzi, F; Gatto, C; Lista, L; Paolucci, P; Piccolo, D; Sciacca, C; Baak, M A; Raven, G; LoSecco, J M; Gabriel, T A; Brau, B; Pulliam, T; Brau, J; Frey, R; 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; Hamon, O; John, M J J; Leruste, Ph; Ocariz, J; Pivk, M; Roos, L; Stark, J; T'Jampens, S; Manfredi, P F; Re, V

2003-09-19

176

Measurement of D{0}-D[-over]{0} mixing from a time-dependent amplitude analysis of D{0}-->K+pi{-}pi{0} decays.  

PubMed

We present evidence of D{0}-D[-over ]{0} mixing using a time-dependent amplitude analysis of the decay D{0}-->K+pi{-}pi;{0} in a data sample of 384 fb{-1} collected with the BABAR detector at the PEP-II e+e{-} collider at the Stanford Linear Accelerator Center. Assuming CP conservation, we measure the mixing parameters x{Kpipi{0}}{'}=[2.61{-0.68}{+0.57}(stat)+/-0.39(syst)]%, y{Kpipi;{0}}{'}=[-0.06{-0.64}{+0.55}(stat)+/-0.34(syst)]%. This result is inconsistent with the no-mixing hypothesis with a significance of 3.2 standard deviations. We find no evidence of CP violation in mixing. PMID:20366027

Aubert, B; Bona, M; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Tico, J Garra; Grauges, E; Lopez, L; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Abrams, G S; Battaglia, M; Brown, D N; Cahn, R N; Jacobsen, R G; Kerth, L T; Kolomensky, Yu G; Lynch, G; Osipenkov, I L; Ronan, M T; Tackmann, K; Tanabe, T; Hawkes, C M; Soni, N; Watson, A T; Koch, H; Schroeder, T; Walker, D; Asgeirsson, D J; Fulsom, B G; Hearty, C; Mattison, T S; McKenna, J A; Barrett, M; Khan, 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; Abachi, S; Buchanan, C; Gary, J W; Liu, F; Long, O; Shen, B C; Vitug, G M; Yasin, Z; Zhang, L; Sharma, V; Campagnari, C; Hong, T M; Kovalskyi, D; Mazur, M A; Richman, J D; Beck, T W; Eisner, A M; Flacco, C J; Heusch, C A; Kroseberg, J; Lockman, W S; Schalk, T; Schumm, B A; Seiden, A; Wang, L; Wilson, M G; Winstrom, L O; Cheng, C H; Doll, D A; Echenard, B; Fang, F; Hitlin, D G; Narsky, I; 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; Ulmer, K A; Wagner, S R; Ayad, R; Soffer, A; Toki, W H; Wilson, R J; Altenburg, D D; Feltresi, E; Hauke, A; Jasper, H; Karbach, M; Merkel, J; Petzold, A; Spaan, B; Wacker, K; Kobel, M J; Mader, W F; Nogowski, R; Schubert, K R; Schwierz, R; Sundermann, J E; Volk, A; Bernard, D; Bonneaud, G R; Latour, E; Thiebaux, Ch; Verderi, M; Clark, P J; Gradl, W; Playfer, S; Watson, J E; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cecchi, A; Cibinetto, G; Franchini, P; Luppi, E; 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; Buzzo, A; Contri, R; Lo Vetere, M; Macri, M M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Chaisanguanthum, K S; Morii, M; Marks, J; Schenk, S; Uwer, U; Klose, V; Lacker, H M; Bard, D J; Dauncey, P D; Nash, J A; Vazquez, W Panduro; Tibbetts, M; Behera, P K; Chai, X; Charles, M J; Mallik, U; Cochran, J; Crawley, H B; Dong, L; Meyer, W T; Prell, S; Rosenberg, E I; Rubin, A E; Gao, Y Y; Gritsan, A V; Guo, Z J; Lae, C K; Denig, A G; Fritsch, M; Schott, G; Arnaud, N; Béquilleux, J; D'Orazio, A; Davier, M; da Costa, J Firmino; Grosdidier, G; Höcker, A; Lepeltier, V; Le Diberder, F; Lutz, A M; 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; George, K A; Di Lodovico, F; Sacco, R; Sigamani, M; Cowan, G; Flaecher, H U; Hopkins, D A; Paramesvaran, S; Salvatore, F; Wren, A C; Brown, D N; Davis, C L; Alwyn, K E; Bailey, D; Barlow, R J; Chia, Y M; Edgar, C L; 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; Li, X; Salvati, E; Saremi, S; Cowan, R; Dujmic, D; Fisher, P H; Koeneke, K; Sciolla, G; Spitznagel, M; Taylor, F; Yamamoto, R K; Zhao, M; Patel, P M; Robertson, S H; Lazzaro, A; Lombardo, V; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Godang, R; Kroeger, R; Sanders, D A; Summers, D J; Zhao, H W; Simard, M; Taras, P; Viaud, F B; 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; Benelli, G; Corwin, L A; Honscheid, K; Kagan, H; Kass, R; Morris, J P; Rahimi, A M; Regensburger, J J; 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; Sanchez, P del Amo; Ben-Haim, E; Briand, H; Calderini, G; Chauveau, J; David, P; Del Buono, L; Hamon, O; Leruste, Ph; Ocariz, J; Perez, A; Prendki, J; Sitt, S; Gladney, L; Biasini, M; Covarelli, R; Manoni, E; Angelini, C; Batignani, G; Bettarini, S; Carpinelli, M; Cervelli, A; Forti, F; Giorgi, M A; Lusiani, A; Marchiori, G; Morganti, M; Neri, N; Paoloni, E; Rizzo, G; Walsh, J J; Pegna, D Lopes; Lu, C; Olsen, J; Smith, A J S; Telnov, A V; Anulli, F; Baracchini, E; Cavoto, G; del Re, D; Di Marco, E; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Jackson, P D; Gioi, L Li; Mazzoni, M A; Morganti, S; Piredda, G; Polci, F; Renga, F; Voena, C; Ebert, M; Hartmann, T; Schröder, H; Waldi, R; Adye, T; Franek, B; Olaiya, E O; Wilson, F F; Emery, S; Escalier, M; Esteve, L; Ganzhur, S F

2009-11-18

177

Precise measurement of the e+e- --> pi+pi-(gamma) cross section with the initial state radiation method at BABAR.  

PubMed

A precise measurement of the cross section of the process e(+)e(-) --> pi(+)pi(-)(gamma) from threshold to an energy of 3 GeV is obtained with the initial state radiation (ISR) method using 232 fb(-1) of data collected with the BABAR detector at e(+)e(-) center-of-mass energies near 10.6 GeV. The ISR luminosity is determined from a study of the leptonic process e(+)e(-) --> mu(+)mu(-)gamma(gamma). The leading-order hadronic contribution to the muon magnetic anomaly calculated using the pipi cross section measured from threshold to 1.8 GeV is (514.1 +/- 2.2(stat) +/- 3.1(syst)) x 10(-10). PMID:20366141

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; Wang, L L; 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; 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

2009-12-03

178

Mesonic excitations and {pi}-{pi} scattering lengths at finite temperature in the two-flavor Polyakov-Nambu-Jona-Lasinio model  

SciTech Connect

The mesonic excitations and s-wave {pi}-{pi} scattering lengths at finite temperature are studied in the two-flavor Polyakov-Nambu-Jona-Lasinio (PNJL) model. The masses of the {pi} and {sigma} mesons, pion-decay constant, the pion-quark coupling strength, and the scattering lengths a{sub 0} and a{sub 2} at finite temperature are calculated in the PNJL model with two forms of Polyakov-loop effective potential. The obtained results are almost independent of the choice of the effective potentials. The calculated results in the PNJL model are also compared with those in the conventional Nambu-Jona-Lasinio model and indicate that the effect of color confinement screens the effect of temperature below the critical one in the PNJL model. Furthermore, the Goldberger-Treiman relation and the Gell-Mann-Oakes-Renner relation are extended to the case at finite temperature in the PNJL model.

Fu Weijie [Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China); Liu Yuxin [Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China); Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000 (China)

2009-04-01

179

Study of conversion decays phi-->etae+e-, eta>e+e-gamma and eta>pi+pi- e+e- at CMD2  

Microsoft Academic Search

Using 15.1 pb-1 of data collected by CMD-2 in the \\/phi-meson energy range, the branching ratios of the following conversion decays have been measured: B(phi-->etae+e-)=(1.14+\\/-0.10+\\/- 0.06)×10-4, B(eta-->e+e-gamma)=(7.10+\\/-0.64+\\/- 0.46)×10-3, B(eta-->pi+pi-e+e- )=(3.7+2.5-1.8+\\/-0.3)×10-4. The upper limits for the following rare conversion decays have been obtained at the 90% confidence level: B(phi-->etamu+mu-)<9.4×10- 6, B(eta-->e+e-e+e- )<6.9×10-5.

R. R. Akhmetshin; E. V. Anashkin; M. Arpagaus; V. M. Aulchenko; V. S. Banzarov; L. M. Barkov; N. S. Bashtovoy; A. E. Bondar; D. V. Bondarev; A. V. Bragin; D. V. Chernyak; S. I. Eidelman; G. V. Fedotovitch; N. I. Gabyshev; A. A. Grebeniuk; D. N. Grigoriev; V. W. Hughes; F. V. Ignatov; P. M. Ivanov; S. V. Karpov; V. F. Kazanin; B. I. Khazin; I. A. Koop; P. P. Krokovny; L. M. Kurdadze; A. S. Kuzmin; M. Lechner; I. B. Logashenko; P. A. Lukin; K. Y. Mikhailov; I. N. Nesterenko; V. S. Okhapkin; A. V. Otboev; E. A. Perevedentsev; A. S. Popov; T. A. Purlatz; N. I. Root; A. A. Ruban; N. M. Ryskulov; A. G. Shamov; Y. M. Shatunov; B. A. Shwartz; A. L. Sibidanov; V. A. Sidorov; A. N. Skrinsky; V. P. Smakhtin; I. G. Snopkov; E. P. Solodov; P. Y. Stepanov; A. I. Sukhanov; J. A. Thompson; V. M. Titov; A. A. Valishev; Y. V. Yudin; S. G. Zverev

2001-01-01

180

Measurements of Branching Fractions and CP-Violating Asymmetries in B0-->pi+pi-, K+pi-, K+K- Decays  

Microsoft Academic Search

We present measurements of branching fractions and CP-violating asymmetries for two-body neutral B¯ meson decays to charged pions and kaons based on a sample of about 88×106 Upsilon(4S)-->BB¯ decays. From a time-independent fit we measure the charge-averaged branching fractions B(B0-->pi+pi- )=(4.7±0.6±0.2)×10-6, B(B0-->K+pi- )=(17.9±0.9±0.7)×10-6, and the direct CP-violating charge asymmetry AKpi=-0.102±0.050±0.016 [-0.188,-0.016], where the ranges in square brackets indicate the 90%

B. Aubert; D. Boutigny; J.-M. Gaillard; A. Hicheur; Y. Karyotakis; J. P. Lees; P. Robbe; V. Tisserand; A. Zghiche; 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; M. S. Gill; A. V. Gritsan; Y. Groysman; R. G. Jacobsen; R. W. Kadel; J. Kadyk; L. T. Kerth; Yu. G. Kolomensky; J. F. Kral; C. Leclerc; M. E. Levi; G. Lynch; L. M. Mir; P. J. Oddone; T. J. Orimoto; M. Pripstein; N. A. Roe; A. Romosan; M. T. Ronan; V. G. Shelkov; A. V. Telnov; W. A. Wenzel; T. J. Harrison; C. M. Hawkes; D. J. Knowles; S. W. O'Neale; R. C. Penny; A. T. Watson; N. K. Watson; T. Deppermann; K. Goetzen; H. Koch; B. Lewandowski; K. Peters; H. Schmuecker; M. Steinke; N. R. Barlow; W. Bhimji; J. T. Boyd; N. Chevalier; P. J. Clark; W. N. Cottingham; C. Mackay; F. F. Wilson; K. Abe; C. Hearty; T. S. Mattison; J. A. McKenna; D. Thiessen; S. Jolly; A. K. McKemey; V. E. Blinov; A. D. Bukin; A. R. Buzykaev; V. B. Golubev; V. N. Ivanchenko; A. A. Korol; E. A. Kravchenko; A. P. Onuchin; S. I. Serednyakov; Yu. I. Skovpen; A. N. Yushkov; D. Best; M. Chao; D. Kirkby; A. J. Lankford; M. Mandelkern; S. McMahon; D. P. Stoker; C. Buchanan; S. Chun; H. K. Hadavand; E. J. Hill; D. B. Macfarlane; H. Paar; S. Prell; Sh. Rahatlou; G. Raven; U. Schwanke; V. Sharma; J. W. Berryhill; C. Campagnari; B. Dahmes; P. A. Hart; N. Kuznetsova; S. L. Levy; O. Long; A. Lu; M. A. Mazur; J. D. Richman; W. Verkerke; J. Beringer; A. M. Eisner; M. Grothe; C. A. Heusch; W. S. Lockman; T. Pulliam; T. Schalk; R. E. Schmitz; B. A. Schumm; A. Seiden; M. Turri; W. Walkowiak; D. C. Williams; M. G. Wilson; E. Chen; G. P. Dubois-Felsmann; A. Dvoretskii; D. G. Hitlin; F. C. Porter; A. Ryd; A. Samuel; S. Yang; S. Jayatilleke; G. Mancinelli; B. T. Meadows; M. D. Sokoloff; T. Barillari; P. Bloom; W. T. Ford; U. Nauenberg; A. Olivas; P. Rankin; J. Roy; J. G. Smith; W. C. van Hoek; L. Zhang; J. L. Harton; T. Hu; M. Krishnamurthy; A. Soffer; W. H. Toki; R. J. Wilson; J. Zhang; D. Altenburg; T. Brandt; J. Brose; T. Colberg; M. Dickopp; R. S. Dubitzky; A. Hauke; E. Maly; R. Müller-Pfefferkorn; S. Otto; K. R. Schubert; R. Schwierz; B. Spaan; L. Wilden; D. Bernard; G. R. Bonneaud; F. Brochard; J. Cohen-Tanugi; S. Ferrag; S. T'jampens; Ch. Thiebaux; G. Vasileiadis; M. Verderi; A. Anjomshoaa; R. Bernet; A. Khan; D. Lavin; F. Muheim; S. Playfer; J. E. Swain; J. Tinslay; M. Falbo; C. Borean; C. Bozzi; L. Piemontese; A. Sarti; E. Treadwell; F. Anulli; R. Baldini-Ferroli; A. Calcaterra; R. de Sangro; D. Falciai; G. Finocchiaro; P. Patteri; I. M. Peruzzi; M. Piccolo; A. Zallo; S. Bagnasco; A. Buzzo; R. Contri; G. Crosetti; M. Lo Vetere; M. Macri; M. R. Monge; S. Passaggio; F. C. Pastore; C. Patrignani; E. Robutti; A. Santroni; S. Tosi; S. Bailey; M. Morii; R. Bartoldus; G. J. Grenier; U. Mallik; J. Cochran; H. B. Crawley; J. Lamsa; W. T. Meyer; E. I. Rosenberg; J. Yi; M. Davier; G. Grosdidier; A. Höcker; H. M. Lacker; S. Laplace; F. Le Diberder; V. Lepeltier; A. M. Lutz; T. C. Petersen; S. Plaszczynski; M. H. Schune; L. Tantot; S. Trincaz-Duvoid; G. Wormser; R. M. Bionta; V. Brigljevic; D. J. Lange; K. van Bibber; D. M. Wright; A. J. Bevan; J. R. Fry; E. Gabathuler; R. Gamet; M. George; M. Kay; D. J. Payne; R. J. Sloane; C. Touramanis; M. L. Aspinwall; D. A. Bowerman; P. D. Dauncey; U. Egede; I. Eschrich; G. W. Morton; J. A. Nash; P. Sanders; D. Smith; G. P. Taylor; J. J. Back; G. Bellodi; P. Dixon; P. F. Harrison; R. J. Potter; H. W. Shorthouse; P. Strother; P. B. Vidal; G. Cowan; H. U. Flaecher; S. George; M. G. Green; A. Kurup; C. E. Marker; T. R. McMahon; S. Ricciardi; F. Salvatore; G. Vaitsas; M. A. Winter; C. L. Davis; J. Allison; R. J. Barlow; A. C. Forti; F. Jackson; G. D. Lafferty; A. J. Lyon; N. Savvas; J. H. Weatherall; J. C. Williams; A. Farbin; A. Jawahery; V. Lillard; D. A. Roberts; J. R. Schieck; G. Blaylock; C. Dallapiccola; K. T. Flood; S. S. Hertzbach; R. Kofler; V. B. Koptchev; T. B. Moore; H. Staengle; S. Willocq; B. Brau; R. Cowan; G. Sciolla; F. Taylor; R. K. Yamamoto; M. Milek; P. M. Patel; F. Palombo; J. M. Bauer; L. Cremaldi; V. Eschenburg; R. Kroeger; J. Reidy; D. A. Sanders; D. J. Summers; C. Hast; P. Taras; H. Nicholson; C. Cartaro; N. Cavallo; G. de Nardo; F. Fabozzi; C. Gatto; L. Lista; P. Paolucci; D. Piccolo; C. Sciacca; J. M. Losecco; J. R. Alsmiller; T. A. Gabriel; J. Brau; R. Frey; M. Iwasaki; C. T. Potter; N. B. Sinev; D. Strom; E. Torrence; F. Colecchia; A. Dorigo; F. Galeazzi; M. Margoni; M. Morandin; M. Posocco; M. Rotondo; F. Simonetto; R. Stroili; C. Voci; M. Benayoun; H. Briand; J. Chauveau; P. David; Ch. de La Vaissière; L. del Buono; O. Hamon; Ph. Leruste; J. Ocariz; M. Pivk; L. Roos; J. Stark; P. F. Manfredi; V. Re; V. Speziali; L. Gladney; Q. H. Guo

2002-01-01

181

Stacking interaction in the middle and at the end of a DNA helix studied with non-natural nucleotides.  

PubMed

Base stacking is important for the base pair interaction of a DNA duplex, DNA replication by polymerases, and single-stranded nucleotide overhangs. To study the mechanisms responsible for DNA stacking interactions, we measured the thermal stability of DNA duplexes containing a non-natural nucleotide tethered to a simple aromatic hydrocarbon group devoid of dipole moments and hydrogen bonding sites. The duplexes containing tetrahydrofuran were paired with a deoxyadenosine derivative (A/T base pair analog) or a deoxycytidine derivative (C/G base pair analog) and showed a lower stability than Watson-Crick base pairing, partly due to the loss of interbase hydrogen bonds. Conversely, non-natural nucleotides present at a dangling end yielded an interaction energy as high as that observed with base pairing. Importantly, the non-natural nucleotides yielded an interaction energy with a linear correlation similar to that of the analogous Watson-Crick base pairs both in the middle and at the end of a DNA duplex, although a different stacking mechanism between the middle and the end was suggested. Moreover, a positive cooperativity was observed in dangling end stacking of the nucleotide base moiety and aromatic hydrocarbon group. These observations are useful to understand nucleic acid interactions and to design new non-natural nucleotides. PMID:20694257

Nakano, Shu-ichi; Oka, Hirohito; Uotani, Yuuki; Uenishi, Kazuya; Fujii, Masayuki; Sugimoto, Naoki

2010-08-09

182

Strain interactions and defect formation in stacked InGaAs quantum dot and dot-in-well structures  

NASA Astrophysics Data System (ADS)

The growth of high-quality stacked quantum dot (QD) structures represents one of the key challenges for future device applications. Electronic coupling between QDs requires closely separated electronic levels and thin barrier layers, requiring near identical composition and shape, despite strong strain interactions. This paper presents a detailed characterization study of stacked InGaAs QD and InAs/InGaAs dot-in-well (DWELL) structures using cross-sectional transmission electron microscopy. For In.5Ga.5As/GaAs QD structures we have observed optimized stacking using a barrier thickness ˜12 nm. We also report studies of stacking in DWELL laser structures. Despite reports of very low threshold currents in such lasers, designed for 1.3 ?m emission, performance is limited by gain saturation and thermal excitation effects. We have explored solutions to these problems by stacking multiple DWELL layers of three, five and 10 repeats. Initial attempts at stacked multilayer structures, particularly samples with a large number of repeats, produced variable results, with a number of the final devices characterized by poor emission and electrical characteristics. Analysis by transmission electron microscopy has identified the presence of large defective regions arising from the complex interaction of dots on several planes and propagating threading dislocations into the cladding layers. The origin of this defect is identified as the coalescence of QDs at very high density and the resulting dislocation propagating to higher dot planes. An effective modified method to reduce the defect density by growing the barrier layer at higher temperature will be discussed. Finally, we report the growth of a stacked 10-layer structure using relatively thin barriers, grown using this technique.

Gutiérrez, M.; Hopkinson, M.; Liu, H. Y.; Ng, J. S.; Herrera, M.; González, D.; Garcia, R.; Beanland, R.

2005-02-01

183

Hydraulic simulation of the interaction between stack emissions and nearby buildings  

Microsoft Academic Search

Summary  A physical simulation in hydraulic channel has been performed, concerning the behaviour of buoyant and neutral plumes in the\\u000a presence of a building of schematic shape placed near the stack. The effect of the aerodynamic wake, due to the stack itself\\u000a and to the building, on the plume geometrical behaviour has been studied. This was done for various stack-building relative

S. Alessio; D. Anfossi; L. Briatore; G. Brusasca

1991-01-01

184

NONWATER QUALITY IMPACTS OF CLOSED-CYCLE COOLING SYSTEMS AND THE INTERACTION OF STACK GAS AND COOLING TOWER PLUMES  

EPA Science Inventory

The report gives results of a literature survey of the nonwater quality impacts of closed-cycle cooling systems. Following discussions of cooling tower and stack gas plumes, interactions of these plumes are considered. For cooling tower plumes, plume types, behavior, salt drift g...

185

Electronic splitting in the excited states of DNA base homodimers and -trimers: an evaluation of short-range and Coulombic interactions.  

PubMed

The nature of the electronic interactions of the stacked nucleic-acid bases (adenine, thymine, cytosine, and uracil) in homodimer and -trimer complexes in their electronically excited states was investigated and analysed in terms of orbital-overlap and Coulombic interactions. The mutual orientations of the adjacent bases were selected so as to correspond to the A- and B-DNA conformations. The extent of the electronic interaction is larger for the former conformation. It is shown that the orbital-overlap interactions at the distance of two bases relevant to the DNA structure do not contribute significantly to the overall electronic coupling. Only the states which are caused by the (pi --> pi*) transitions manifest an electronic coupling. PMID:18956103

Nachtigallová, Dana; Hobza, Pavel; Ritze, Hans-Hermann

2008-07-30

186

Impact of local stacking on the graphene-impurity interaction: Theory and experiments  

NASA Astrophysics Data System (ADS)

We investigate the graphene-impurity interaction problem by combining experimental—scanning tunneling microscopy (STM) and spectroscopy (STS)—and theoretical—Anderson impurity model and density functional theory (DFT) calculations—techniques. We use graphene on the SiC(0001¯)(2×2)C reconstruction as a model system. The SiC substrate reconstruction is based on silicon adatoms. Graphene mainly interacts with the dangling bonds of these adatoms which act as impurities. Graphene grown on SiC(0001¯)(2×2)C shows domains with various orientations relative to the substrate so that very different local graphene/Si adatom stacking configurations can be probed on a given grain. The position and width of the adatom (impurity) state can be analyzed by STM/STS and related to its local environment owing to the high-bias electronic transparency of graphene. The experimental results are compared to Anderson's model predictions and complemented by DFT calculations for some specific local environments. We conclude that the adatom resonance shows a smaller width and a larger shift toward the Dirac point for an adatom at the center of a graphene hexagon than for an adatom just on top of a C graphene atom.

Hiebel, F.; Mallet, P.; Veuillen, J.-Y.; Magaud, L.

2012-11-01

187

Trinuclear organooxotin assemblies from solvothermal synthesis reaction: Crystal structure, hydrogen bonding and ? ? stacking interaction  

NASA Astrophysics Data System (ADS)

Two new trinuclear mono-organooxotin(IV) complexes with 2,3,4,5-tetrafluorobenzoic acid and sodium perchlorate of the types: [(SnR)3(OH)(2,3,4,5-F4C6HCO2)4 · ClO4] · [O2CC6HF4](R = PhCH2, 1; o-F-PhCH2 for 2), have been solvothermally synthesized and structurally characterized by elemental, IR, 1H, 13C and 119Sn NMR and X-ray crystallography diffraction analyses. Complex 2 is also characterized by X-ray crystallography diffraction analyses. In complex 2, four carboxyl groups and a perchlorate bridged three tin atoms in a cyclohexane chair arrangement and form the basic framework. A hydroxyl group comprises the oxygen components of the stannoxane ring system. In these complexes, weak but significant intramolecular hydrogen bonding and ? ? stacking interaction are also shown. These contacts lead to aggregation and supramolecular assembly of complexes 1 and 2 into 1D or 2D framework.

Ma, Chunlin; Sun, Junshan; Zhang, Rufen

2007-05-01

188

Effects of nucleobase metalation on frontier molecular orbitals: potential implications for pi-stacking interactions with tryptophan.  

PubMed

Biochemical recognition processes mediated through pi-stacking interactions are a potential target for rational drug synthesis. A combination of electrostatic, hydrophobic, solvation, charge-transfer, induction, and dispersion interactions has been used to account for the three-dimensional arrangements observed in such motifs. A principal example involves the interaction of purine and pyrimidine rings of nucleic acids with aromatic amino-acid residues such as tryptophan, phenylalanine, and tyrosine. Protonation, alkylation, or coordination of a metal ion such as Pd(II) or Pt(II) to a nucleobase strengthens this interaction by lowering the energy of the lowest unoccupied molecular orbital (LUMO) of the modified nucleobase and improving overlap with the highest occupied molecular orbital (HOMO) in N-acetyl tryptophan. The relative energy difference between the frontier orbitals of isolated molecules, obtained using Density Functional Theory (DFT), is explored as a predictive tool for the strength of the pi-stacking interaction of the nucleobase/tryptophan pair. From the optimized structures of these species, evaluation of the donor-acceptor HOMO-LUMO gap (Deltaepsilon d-->a) suggests that this parameter is a promising predictor of pi-stacking strength for the donor-acceptor pairs presented in this study. The analysis correlates well with experimental association constants, measured by fluorescence spectroscopy, of metallated and alkylated nucleobases with tryptophan in comparison to free nucleobases. PMID:18939818

Anzellotti, Atilio I; Bayse, Craig A; Farrell, Nicholas P

2008-10-22

189

Electrochemistry and electrogenerated chemiluminescence of ?-stacked poly(fluorenemethylene) oligomers. Multiple, interacting electron transfers.  

PubMed

The electrochemistry, spectroscopy, and electrogenerated chemiluminescence (ECL) of a series of ?-stacked poly(fluorenemethylene) oligomers (Fn, n = 1-6) were investigated. The pendant cofacially oriented fluorene moieties are essentially in contact with each other by Van der Waals interaction promoting electronic delocalization in these species. All six compounds give successive cyclic voltammetric one-electron (1e) oxidations in 1:1 acetonitrile/benzene (MeCN/Bz), and the multiple 1e transfer properties of all these compounds were confirmed by chronoamperometric experiments with an ultramicroelectrode and digital simulations. The potentials for oxidation of the successive 1e transfers can be explained in terms of electrostatic interactions among the fluorenes. The monomer (F1) shows one irreversible wave, while F2 shows two reversible 1e waves. F3 shows only two reversible 1e oxidation waves, which is consistent with the large energy to remove a third electron because of the greater electrostatic repulsion, so the third wave is shifted toward more positive potentials. Both F4 and F5 show three reversible 1e oxidation waves, while F6 shows four reversible 1e waves. The removal of the first electron from an oligomer becomes easier as n increases. The stability of the radical cations also increases with n. The removal of consecutive electrons from Fn can be correlated with the distance between fluorene moieties. No reduction peaks were observed except for some broad ones at ~-3.2 V vs SCE in THF, which is consitent with the wide highest occupied molecular orbital-lowest unoccupied molecular orbital gap in these compounds (absorbance at about 300 nm). No characteristic annihilation ECL signal was observed for these compounds in 1:1 MeCN/Bz mixed solvent. However, the ECL of F6 in the presence of the coreactant C(2)O(4)(2-) showed a long-wavelength ECL emission that was proposed to be electrolyzed byproduct from the radical cation. PMID:22946643

Qi, Honglan; Chang, Jinho; Abdelwahed, Sameh H; Thakur, Khushabu; Rathore, Rajendra; Bard, Allen J

2012-09-20

190

Base-base and deoxyribose-base stacking interactions in B-DNA and Z-DNA: a quantum-chemical study.  

PubMed Central

Base-stacking interactions in canonical and crystal B-DNA and in Z-DNA steps are studied using the ab initio quantum-chemical method with inclusion of electron correlation. The stacking energies in canonical B-DNA base-pair steps vary from -9.5 kcal/mol (GG) to -13.2 kcal/mol (GC). The many-body nonadditivity term, although rather small in absolute value, influences the sequence dependence of stacking energy. The base-stacking energies calculated for CGC and a hypothetical TAT sequence in Z-configuration are similar to those in B-DNA. Comparison with older quantum-chemical studies shows that they do not provide even a qualitatively correct description of base stacking. We also evaluate the base-(deoxy)ribose stacking geometry that occurs in Z-DNA and in nucleotides linked by 2',5'-phosphodiester bonds. Although the molecular orbital analysis does not rule out the charge-transfer n-pi* interaction of the sugar 04' with the aromatic base, the base-sugar contact is stabilized by dispersion energy similar to that of stacked bases. The stabilization amounts to almost 4 kcal/mol and is thus comparable to that afforded by normal base-base stacking. This enhancement of the total stacking interaction could contribute to the propensity of short d(CG)n sequences to adopt the Z-conformation. Images FIGURE 2 FIGURE 4

Sponer, J; Gabb, H A; Leszczynski, J; Hobza, P

1997-01-01

191

Theoretical investigation of the coupling between hydrogen atoms transfer and stacking interaction in guanine-cytosine dimers.  

PubMed

The effect of the stacking interaction on some properties of the guanine-cytosine (G-C) base pair has been studied. In particular, the strength of the hydrogen bonds, the mechanism of hydrogen transfer and the charge redistribution intra- and inter-base pair have been analyzed in the three canonical dimers. The inclusion of both the stacking interaction and of the hydrogen bond interaction between the bases allows us to study both the local and the long-range phenomena of DNA. The comparison of these results with those of the G-C monomeric system supports the idea that the variations of these properties depend from the exact dimer considered and are different for one or another hydrogen bond. Also the different mechanisms of two hydrogen transfer (step to step and concerted) can be modified by the stacking interaction between the base pairs. The comparison with previous data shows that some generalizations found in literature must be analyzed in detail. PMID:24108195

Villani, Giovanni

2013-10-23

192

The effects of the ?-? stacking interactions on the patterns of gold nanoparticles formed at the air-water interface.  

PubMed

Benzyl-n-hexadecyl dimethylammonium chloride (BHDC) monolayer-stabilized gold nanoparticles were synthesized in a two-phase liquid-liquid system and found to self-assemble into varied structures under the control of temperature at the air-water interface. It has been demonstrated that the ?-? stacking interactions between the capping agent molecules significantly affect the formation of the unique patterns. A possible mechanism based on Marangoni-Bénard convection in the evaporating droplets and ?-? stacking interactions was proposed. Four surfactants with similar structures: N-hexadecyl-N-methylpyrrolidinium bromide (C(16)MPB), 1-hexadecyl-3-methylimidazolium bromide (C(16)mimBr), 1-(2,4,6-trimethylphenyl)-3-hexadecylimidazolium bromide (C(16)pimBr) and hexadecyltrimethylammonium bromide (CTAB) were also used to further verify the formation mechanism mentioned above. PMID:22535258

Jia, Han; Bai, Xiangtao; Shi, Lijuan; Lu, Fei; Zheng, Liqiang

2012-04-25

193

Measurement of gamma in B-+ to D(*) K-+ and B-+ to D K*-+ Decays with a Dalitz Analysis of D to Ks pi- pi+  

SciTech Connect

We present a measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase {gamma} with a Dalitz plot analysis of neutral D-meson decays to the K{sub S}{sup 0} {pi}{sup -}{pi}{sup +} final state from B{sup {-+}} {yields} D{sup (*)}K{sup {-+}} and B{sup {-+}} {yields} DK*{sup {-+}} decays, using a sample of 227 million B{bar B} pairs collected by the BABAR detector. We measure {gamma} = (67 {+-} 28 {+-} 13 {+-} 11){sup o}, where the first error is statistical, the second is the experimental systematic uncertainty and the third reflects the Dalitz model uncertainty. This result suffers from a two-fold ambiguity. The contribution to the Dalitz model uncertainty due to the description of the {pi}{pi} S-wave in D{sup 0} {yields} K{sub S}{sup 0}{pi}{sup -}{pi}{sup +}, evaluated using a K-matrix formalism, is found to be 3{sup o}.

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 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. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /Harvard U. /Heidelberg U. /Imperial Coll., London /Iowa U. /Iowa State 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. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /Paris U., VI-VII /Pennsylvania U. /Perugia U. /INFN, Perugia /Pisa U. /Pisa, Scuola Normale Superiore /INFN, Pisa /Prairie View A-M /Princeton U. /Rome U. /INFN, Rome /Rostock U. /Rutherford /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. /INFN, Trieste /Valencia U., IFIC /Vanderbilt U. /Victoria U. /Warwick U. /Wisconsin U., Madison /Yale U.

2005-08-04

194

Measurement of the Cabibbo-Kobayashi-Maskawa angle gamma in B+/--->D*K+/- decays with a Dalitz analysis of D-->K0(S)pi-pi+.  

PubMed

We report on a measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase gamma through a Dalitz analysis of neutral D decays to K0(S)pi-pi+ in the processes B+/- -->D*K+/-, D*-->Dpi0, Dgamma. Using a sample of 227 x 10(6) BB pairs collected by the BABAR detector, we measure the amplitude ratios r(B)=0.12+/-0.03+/-0.04 and r*(B)=0.17+/-0.10+/-0.03+/-0.03, the relative strong phases delta(B)=(104+/-45(+17+16)(-21-24))degrees and delta*(B)=(-64+/-41(+14)(-12)+/-15) degrees between the amplitudes A(B- -->D*0K-) and A(B- -->D*0)K-), and gamma=(70+/-31(+12+14)(-10-11))degrees. The first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the Dalitz model uncertainty. The results for the strong and weak phases have a twofold ambiguity. PMID:16197065

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A; Grauges, E; Palano, A; Pappagallo, M; Pompili, A; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S; Eigen, G; Ofte, I; Stugu, B; Abrams, G S; Battaglia, M; 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; Cuhadar-Donszelmann, T; Hearty, C; Knecht, N S; Mattison, T S; McKenna, J A; Khan, A; Kyberd, P; Teodorescu, L; Blinov, A E; Blinov, V E; Bukin, A D; 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; Bondioli, M; 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; Zhang, L; Del Re, D; Hadavand, H K; Hill, E J; Macfarlane, D B; Paar, H P; Rahatlou, S; 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; Andreassen, R; 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; Wagner, S R; Zhang, J; 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; Klose, V; 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; Gradl, W; Muheim, F; Playfer, S; Xie, Y; Andreotti, M; Azzolini, V; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Luppi, E; Negrini, M; Piemontese, L; 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; 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; Schenk, S; Uwer, U; Bhimji, W; Bowerman, D A; Dauncey, P D; Egede, U; Flack, R L; 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; Eyges, V; 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; Oyanguren, A; Petersen, T C; Pierini, M; Plaszczynski, S; Rodier, S; Roudeau, P; Schune, M H; Stocchi, A; 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; George, K A; Hutchcroft, D E; Parry, R J; Payne, D J; Touramanis, C; Cormack, C M; Di Lodovico, F; Brown, C L; Cowan, G; Flaecher, H U; Green, M G; Jackson, P S; McMahon, T R; Ricciardi, S; Salvatore, F; 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; Li, X; Moore, T B; Saremi, S; Staengle, H; Willocq, S; Cowan, R; Koeneke, K; Sciolla, G; Sekula, S J; Taylor, F; Yamamoto, R K; Kim, H; 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; Viaud, B; Nicholson, H; Cavallo, N; De Nardo, G; 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; Jackson, P D; Kagan, H; Kass, R; Pulliam, T; Rahimi, A M; Ter-Antonyan, R; Wong, Q K; Brau, J

2005-09-14

195

The Search for Exotic Mesons in {gamma}p{yields}{pi}{sup +{pi}+{pi}-}n with CLAS at Jefferson Lab  

SciTech Connect

In addition to ordinary qq-bar pairs, quantum chromodynamics (QCD) permits many other possibilities in meson spectra, such as gluonic hybrids, glueballs, and tetraquarks. Experimental discovery and study of these exotic states provides insight on the nonperturbative regime of QCD. Over the past twenty years, some searches for exotic mesons have met with controversial results, especially those obtained in the three-pion system. Prior theoretical work indicates that in photoproduction one should find gluonic hybrids at significantly enhanced levels compared to that found in pion production. To that end, the CLAS g12 run was recently completed at Jefferson Lab, using a liquid hydrogen target and tagged photons from a 5.71 GeV electron beam. The CLAS experimental apparatus was modified to maximize forward acceptance for peripheral production of mesons. The resulting data contains the world's largest 3{pi} photoproduction dataset, with {gamma}p{yields}{pi}{sup +{pi}+{pi}-}n events numbering in the millions. Early results describing the data quality, kinematics, and dysnamics will be shown.

Bookwalter, Craig [Department of Physics, Florida State University, Tallahassee, FL 32306 (United States)

2010-08-05

196

The effects of the ?-? stacking interactions on the patterns of gold nanoparticles formed at the air-water interface  

NASA Astrophysics Data System (ADS)

Benzyl-n-hexadecyl dimethylammonium chloride (BHDC) monolayer-stabilized gold nanoparticles were synthesized in a two-phase liquid-liquid system and found to self-assemble into varied structures under the control of temperature at the air-water interface. It has been demonstrated that the ?-? stacking interactions between the capping agent molecules significantly affect the formation of the unique patterns. A possible mechanism based on Marangoni-Bénard convection in the evaporating droplets and ?-? stacking interactions was proposed. Four surfactants with similar structures: N-hexadecyl-N-methylpyrrolidinium bromide (C16MPB), 1-hexadecyl-3-methylimidazolium bromide (C16mimBr), 1-(2,4,6-trimethylphenyl)-3-hexadecylimidazolium bromide (C16pimBr) and hexadecyltrimethylammonium bromide (CTAB) were also used to further verify the formation mechanism mentioned above.Benzyl-n-hexadecyl dimethylammonium chloride (BHDC) monolayer-stabilized gold nanoparticles were synthesized in a two-phase liquid-liquid system and found to self-assemble into varied structures under the control of temperature at the air-water interface. It has been demonstrated that the ?-? stacking interactions between the capping agent molecules significantly affect the formation of the unique patterns. A possible mechanism based on Marangoni-Bénard convection in the evaporating droplets and ?-? stacking interactions was proposed. Four surfactants with similar structures: N-hexadecyl-N-methylpyrrolidinium bromide (C16MPB), 1-hexadecyl-3-methylimidazolium bromide (C16mimBr), 1-(2,4,6-trimethylphenyl)-3-hexadecylimidazolium bromide (C16pimBr) and hexadecyltrimethylammonium bromide (CTAB) were also used to further verify the formation mechanism mentioned above. Electronic supplementary information (ESI) available. See DOI: 10.1039/c2nr30286a

Jia, Han; Bai, Xiangtao; Shi, Lijuan; Lu, Fei; Zheng, Liqiang

2012-05-01

197

CDF Grid computing and the decay X(3872) ---> J/psi pi+ pi- with J/psi ---> e+ e-  

SciTech Connect

The main aim of physics research is to obtain a consistent description of nature leading to a detailed understanding of the phenomena observed in experiments. The field of particle physics focuses on the discovery and understanding of the fundamental particles and the forces by which they interact with each other. Using methods from group theory, the present knowledge can be mathematically described by the so-called ''Standard Model'', which interprets the fundamental particles (quarks and leptons) as quantum-mechanical fields interacting via the electromagnetic, weak and strong force. These interactions are mediated via gauge particles such as the photon (for the electromagnetic force), W{sup {+-}} and Z{sup 0} (for the weak force) and gluons (for the strong force). Gravitation is not yet included in this description as it presently cannot be formulated in a way to be incorporated in the Standard Model. However, the gravitational force is negligibly small on microscopic levels. The validity of this mathematical approach is tested experimentally by accelerating particles such as electrons and protons, as well as their antiparticles, to high energies and observing the reactions as these particles collide using sophisticated detectors. Due to the high energy of the particles involved, these detectors need to be as big as a small house to allow for precision measurements. Comparing the predictions from theory with the analyzed reactions observed in these collisions, the Standard Model has been established as a well-founded theory. Precision measurements from the four experiments (Aleph, Delphi, Opal, L3) the Large Electron Positron collider (LEP), operated at CERN during the years 1989-2000, allow the determination of the Standard Model parameters with enormous accuracy.

Kerzel, Ulrich; /Karlsruhe U., EKP

2005-11-01

198

Simulation of the photodeactivation of formamide in the nO-pi* and pi-pi* states: an ab initio on-the-fly surface-hopping dynamics study.  

PubMed

The short-time photodynamics (1 ps) of formamide in its low-lying singlet excited n(O)-pi(*) and pi-pi(*) states have been investigated by the direct trajectory surface-hopping method based on multiconfigurational ab initio calculations. The simulations showed that in both states, the primary deactivation process is C-N bond dissociation. In the ground state, the energy is transferred to (a) translational motion of the HCO and NH(2) fragments, (b) additional C-H dissociation from the vibrationally hot HCO fragment, or (c) formation of NH(3) and CO. In addition to the C-N dissociation pathway, C-O bond fission is found to be an additional primary deactivation path in the pi-pi(*) dynamics. From fractional occupations of trajectories, lifetimes of formamide were estimated: tau(S(1))=441 fs and tau(S(2))=66 fs. PMID:18154378

Antol, Ivana; Eckert-Maksi?, Mirjana; Barbatti, Mario; Lischka, Hans

2007-12-21

199

Evidence of a Broad Structure at an Invariant Mass of 4.32GeV\\/c2 in the Reaction e+e--->pi+pi-psi(2S) Measured at BABAR  

Microsoft Academic Search

We present a measurement of the cross section of the process e+e--->pi+pi-psi(2S) from threshold up to 8 GeV center-of-mass energy using events containing initial-state radiation, produced at the SLAC PEP-II e+e- storage rings. The study is based on 298fb-1 of data recorded with the BABAR detector. A structure is observed in the cross section not far above threshold, near 4.32

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; 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; 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; S. E. Morgan; 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; 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; 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; F. Fang; D. G. Hitlin; I. Narsky; T. Piatenko; F. C. Porter; A. Ryd; A. Samuel; 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; 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; P. Grenier; 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. 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; 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; 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; G. Cowan; H. U. Flaecher; D. A. Hopkins; P. D. Jackson; T. R. McMahon; S. Ricciardi; 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. Baak; 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; A. M. Rahimi; R. Ter-Antonyan; Q. K. Wong; N. L. Blount; J. Brau; R. Frey; O. Igonkina; M. Lu; R. Rahmat; N. B. Sinev; D. Strom; J. Strube; E. Torrence

2007-01-01

200

Center motions of nonoverlapping condensates coupled by long-range dipolar interaction in bilayer and multilayer stacks  

SciTech Connect

We investigate the effect of anisotropic and long-range dipole-dipole interaction (DDI) on the center motions of nonoverlapping Bose-Einstein condensates in bilayer and multilayer stacks. In the bilayer, it is shown analytically that while DDI plays no role in the in-phase modes of center motions of condensates, out-of-phase mode frequency ({omega}{sub o}) depends crucially on the strength of DDI (a{sub d}). At the small-a{sub d} limit, {omega}{sub o}{sup 2}(a{sub d})-{omega}{sub o}{sup 2}(0){proportional_to}a{sub d}. In the multilayer stack, transverse modes associated with center motions of coupled condensates are found to be optical-phonon-like. At the long-wavelength limit, phonon velocity is proportional to {radical}(a){sub d}.

Huang, Chao-Chun; Wu, Wen-Chin [Department of Physics, National Taiwan Normal University, Taipei 11650, Taiwan (China)

2010-11-15

201

Energy hyperspace for stacking interaction in AU/AU dinucleotide step: Dispersion-corrected density functional theory study.  

PubMed

Double helical structures of DNA and RNA are mostly determined by base pair stacking interactions, which give them the base sequence-directed features, such as small roll values for the purine-pyrimidine steps. Earlier attempts to characterize stacking interactions were mostly restricted to calculations on fiber diffraction geometries or optimized structure using ab initio calculations lacking variation in geometry to comment on rather unusual large roll values observed in AU/AU base pair step in crystal structures of RNA double helices. We have generated stacking energy hyperspace by modeling geometries with variations along the important degrees of freedom, roll, and slide, which were chosen via statistical analysis as maximally sequence dependent. Corresponding energy contours were constructed by several quantum chemical methods including dispersion corrections. This analysis established the most suitable methods for stacked base pair systems despite the limitation imparted by number of atom in a base pair step to employ very high level of theory. All the methods predict negative roll value and near-zero slide to be most favorable for the purine-pyrimidine steps, in agreement with Calladine's steric clash based rule. Successive base pairs in RNA are always linked by sugar-phosphate backbone with C3'-endo sugars and this demands C1'-C1' distance of about 5.4 Å along the chains. Consideration of an energy penalty term for deviation of C1'-C1' distance from the mean value, to the recent DFT-D functionals, specifically ?B97X-D appears to predict reliable energy contour for AU/AU step. Such distance-based penalty improves energy contours for the other purine-pyrimidine sequences also. © 2013 Wiley Periodicals, Inc. Biopolymers 101: 107-120, 2014. PMID:23722519

Mukherjee, Sanchita; Kailasam, Senthilkumar; Bansal, Manju; Bhattacharyya, Dhananjay

2014-01-01

202

An Amplitude Analysis of the Decay B+- -> pi+- pi+- pi-+  

SciTech Connect

The authors present a Dalitz-plot analysis of charmless B{sup {+-}} decays to the final state {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}} using 210 fb{sup -1} of data recorded by the BABAR experiment at {radical}s = 10.58 GeV. We measure the branching fractions {Beta}(B{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}}) = (16.2 {+-} 1.2 {+-} 0.9) x 10{sup -6} and {Beta}(B{sup {+-}} {yields} {rho}{sup 0}(770){pi}{sup {+-}}) = (8.8 {+-} 1.0 {+-} 0.6{sub -0.7}{sup +0.1}) x 10{sup -6}. Measurements of branching fractions for the quasi-two-body decays B{sup {+-}} {yields} {rho}{sup 0}(1450){pi}{sup {+-}}, B{sup {+-}} {yields} f{sub 0}(980){pi}{sup {+-}} and B{sup {+-}} f{sub 2}(1270){pi}{sup {+-}} are also presented. They observe no charge asymmetries for the above modes, and there is no evidence for the decays B{sup {+-}} {yields} {chi}{sub c0}{pi}{sup {+-}}, B{sup {+-}} {yields} f{sub 0}(1370){pi}{sup {+-}} and B{sup {+-}} {yields} {sigma}{pi}{sup {+-}}.

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 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. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /Harvard U. /Heidelberg U. /Imperial Coll., London /Iowa U. /Iowa State 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. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /Padua U. /INFN, Padua /Paris U., VI-VII /Pennsylvania U. /Perugia U. /INFN, Perugia /Pisa U. /INFN, Pisa /Prairie View A-M /Princeton U. /Rome U. /INFN, Rome /Rostock U. /Rutherford /DAPNIA, Saclay /South Carolina U. /SLAC /Stanford U., Phys. Dept. /SUNY, Stony Brook /Tennessee U. /Texas U. /Texas U., Dallas /Turin U. /INFN, Turin /Trieste U. /INFN, Trieste /Valencia U., IFIC /Vanderbilt U. /Victoria U. /Wisconsin U., Madison /Yale U.

2005-07-11

203

Dalitz Plot Analysis of B+- --> pi+-pi+-pi-+ Decays  

SciTech Connect

The authors present a Dalitz-plot analysis of charmless B{sup {+-}} decays to the final state {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}} using a sample of (465 {+-} 5) x 10{sup 6} B{bar B} pairs collected by the BABAR experiment at {radical}s = 10.58 GeV. They measure the branching fractions {Beta}(B{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}}) = (15.2 {+-} 0.6 {+-} 1.2 {+-} 0.4) x 10{sup -6}, {Beta}(B{sup {+-}} {yields} {rho}{sup 0}(770){pi}{sup {+-}}) = (8.1 {+-} 0.7 {+-} 1.2{sub -1.1}{sup +0.4}) x 10{sup -6}, {Beta}(B{sup {+-}} {yields} f{sub 2}(1270){pi}{sup {+-}}) = (1.57 {+-} 0.42 {+-} 0.16{sub -0.19}{sup +0.53}) x 10{sup -6}, and {Beta}(B{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup {+-}}{pi}{sup {-+}} nonresonant) = (5.3 {+-} 0.7 {+-} 0.6{sub -0.5}{sup +1.1}) x 10{sup -6}, where the uncertainties are statistical, systematic, and model-dependent, respectively. Measurements of branching fractions for the modes B{sup {+-}} {yields} {rho}{sup 0}(1450){pi}{sup {+-}} and B{sup {+-}} {yields} f{sub 0}(1370){pi}{sup {+-}} are also presented. They observe no significant direct CP asymmetries for the above modes, and there is no evidence for the decays B{sup {+-}} {yields} f{sub 0}(980){pi}{sup {+-}}, B{sup {+-}} {yields} {chi}{sub c0}{pi}{sup {+-}}, or B{sup {+-}} {yields} {chi}{sub c2}{pi}{sup {+-}}.

Collaboration, The BABAR; Aubert, B.

2009-02-23

204

Dalitz Plot Analysis of Ds+->pi+pi-pi+  

SciTech Connect

A Dalitz plot analysis of {approx} 13, 000 D{sub s}{sup +} decays to {pi}{sup +}{pi}{sup +}{pi}{sup -} has been performed. A 384 fb{sup -1} data sample, recorded by the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} storage ring running at center of mass energies near 10.6 GeV, is used. Amplitudes and phases of the intermediate resonances which contribute to this final state are measured. A high precision measurement of the ratio: {Beta}(D{sub s}{sup +} {yields} {pi}{sup +}{pi}{sup +}{pi}{sup -})/{Beta}(D{sub s}{sup +} {yields} K{sup +}K{sup -}{pi}{sup +}) = 0.199 {+-} 0.004 {+-} 0.006 is performed. Using a model independent partial wave analysis the amplitude and phase of the S-wave have been measured.

Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Lopez, L.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Abrams, G.S.; Battaglia, M.; Brown, D.N.; Cahn, R.N.; Jacobsen, R.G.; /LBL, Berkeley /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /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. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /Frascati /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /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 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, LNS /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 /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 /DSM, DAPNIA, Saclay /South Carolina U. /SLAC /Stanford U., Phys. Dept. /SUNY, Albany /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

2009-01-26

205

On ?-stacking, C-H/?, and halogen bonding interactions in halobenzene clusters: Resonant two-photon ionization studies of chlorobenzene  

NASA Astrophysics Data System (ADS)

Noncovalent interactions such as hydrogen bonding, ?-? stacking, CH/? interactions, and halogen bonding play crucial roles in a broad spectrum of chemical and biochemical processes, and can exist in cooperation or competition. Here we report studies of the homoclusters of chlorobenzene, a prototypical system where ?-? stacking, CH/? interactions, and halogen bonding interactions may all be present. The electronic spectra of chlorobenzene monomer and clusters (Clbz)n with n = 1-4 were obtained using resonant 2-photon ionization in the origin region of the S0-S1 (??*) state of the monomer. The cluster spectra show in all cases a broad spectrum whose center is redshifted from the monomer absorption. Electronic structure calculations aid in showing that the spectral broadening arises in large part from inhomogeneous sources, including the presence of multiple isomers and Franck-Condon (FC) activity associated with geometrical changes induced by electronic excitation. Calculations at the M06-2x/aug-cc-pVDZ level find in total five minimum energy structures for the dimer, four ?-stacked structures, and one T-shaped, and six representative minimum energy structures were found for the trimer. The calculated time-dependent density functional theory spectra using range-separated and meta-GGA hybrid functionals show that these isomers absorb over a range that is roughly consistent with the breadth of the experimental spectra, and the calculated absorptions are redshifted with respect to the monomer transition, in agreement with experiment. Due to the significant geometry change in the electronic transition, where for the dimer a transition from a parallel displaced to sandwich structure occurs with a reduced separation of the two monomers, significant FC activity is predicted in low frequency intermolecular modes.

Muzangwa, Lloyd; Nyambo, Silver; Uhler, Brandon; Reid, Scott A.

2012-11-01

206

Cy3DNA Stacking Interactions Strongly Depend on the Identity of the Terminal Basepair  

Microsoft Academic Search

We characterized the effect of the first basepair on the conformational dynamics of the fluorescent dye Cy3 attached to the 5? end of double-stranded DNA using Gaussian-mixture adaptive umbrella sampling simulations. In the simulations, the sampling of all five dihedral angles along the linker was enhanced, so that both stacked and unstacked states were sampled. The affinity of Cy3 for

Justin Spiriti; Jennifer K. Binder; Marcia Levitus; Arjan van der Vaart

2011-01-01

207

Influence of carbonaceous particles on the interaction of coal combustion stack ash with organic matter  

Microsoft Academic Search

Stack ash samples were fractionated by aerodynamic size, and the largest particle size fraction was separated into constituent particle type subfractions. Comparison of the mineral, magnetic, and carbonaceous particles showed that coked coal is responsible for the sorptivity of the large particle size fraction for carbon-14 labeled benzo(a)pyrene ((¹⁴C)BaP) and for low solvent extraction recoveries. Elevated levels of organic matter

Wayne H. Griest; Bruce A. Tomkins

1986-01-01

208

Hydrogen bonding and stacking interactions of nucleic acid base pairs: A density-functional-theory based treatment  

NASA Astrophysics Data System (ADS)

We extend an approximate density functional theory (DFT) method for the description of long-range dispersive interactions which are normally neglected by construction, irrespective of the correlation function applied. An empirical formula, consisting of an R-6 term is introduced, which is appropriately damped for short distances; the corresponding C6 coefficient, which is calculated from experimental atomic polarizabilities, can be consistently added to the total energy expression of the method. We apply this approximate DFT plus dispersion energy method to describe the hydrogen bonding and stacking interactions of nucleic acid base pairs. Comparison to MP2/6-31G*(0.25) results shows that the method is capable of reproducing hydrogen bonding as well as the vertical and twist dependence of the interaction energy very accurately.

Elstner, Marcus; Hobza, Pavel; Frauenheim, Thomas; Suhai, Sándor; Kaxiras, Efthimios

2001-03-01

209

McConnell I mechanism promotes ferromagnetic interactions between ?-stacked Ni(ii)-thiazyl complexes.  

PubMed

The coordination complex of Ni(hfac)2 (hfac = 1,1,1,5,5,5-hexafluoroacetylacetonato) and the 4-(benzoxazol-2'-yl)-1,2,3,5-dithiadiazolyl (boaDTDA) neutral radical ?-stacks in a one-dimensional "staircase" arrangement. This particular packing aligns regions of ? and ? spin densities on neighbouring Ni(II)(hfac)2(boaDTDA) molecules. This complex exemplifies a McConnell I type mechanism, giving rise to intermolecular ferromagnetic exchange observed for the first time between metal-thiazyl complexes. PMID:24005259

Fatila, Elisabeth M; Clérac, Rodolphe; Jennings, Michael; Preuss, Kathryn E

2013-10-21

210

Stacked Regressions  

Microsoft Academic Search

Stacking regressions is a method for forming linear combinations of different predictors to give improved prediction accuracy. The idea is to use cross-validation data and least squares under non-negativity constraints to determine the coefficients in the combination. Its effectiveness is demonstrated in stacking regression trees of different sizes and in a simulation stacking linear subset and ridge regressions. Reasons why

Leo Breiman; Ross Quinlan

1996-01-01

211

Stacked Regressions  

Microsoft Academic Search

Stacking regressions is a method for forming linear combinations of different predictors to give improved prediction accuracy. The idea is to use cross-validation data and least squares under non negativity constraints to determine the coefficients in the combination. Its effectiveness is demonstrated in stacking regression trees of different sizes and in a simulation stacking linear subset and ridge regressions. Reasons

Leo Breiman

1996-01-01

212

Effects of Low-k Stack Structure on Performance of Complementary Metal Oxide Semiconductor Devices and Chip Package Interaction Failure  

NASA Astrophysics Data System (ADS)

Low capacitance and highly reliable Cu dual-damascene (DD) interconnects have been developed with self-organized ``seamless low-k SiOCH stacks'' (SEALS) structure. A carbon-rich sub-nano porous SiOCH (k=2.5) was directly stacked on an oxygen-rich porous SiOCH (k=2.7) in the SEALS structure, without a hard-mask (HM) and etch-stop (ES) layer of SiO2. The effective k-value (keff) of the Cu DD interconnect including the SiCN capping layer (k=4.9) was reduced to 2.9 compared to 3.4 on a conventional hybrid structure with SiO2-HM and ES, which had been used in 65-nm-node mass production. The interconnect delay of a 45-nm-node complementary metal oxide semiconductor (CMOS) ring oscillator (RO) was reduced by 15% referring to that of the conventional hybrid structure. Interconnect reliabilities, such as the interline time dependent dielectric breakdown (TDDB) and thermal cycles, were unchanged from those of the conventional hybrid interconnects. No failure was detected for chip package interaction (CPI) during reliability tests in a plastic ball grid array (PBGA) package. SEALS is a promising structure for scaled down ultra large scale integrations (ULSIs) for highly reliable and high speed operation, and low power consumption.

Tagami, Masayoshi; Inoue, Naoya; Ueki, Makoto; Narihiro, Mitsuru; Tada, Munehiro; Yamamoto, Hironori; Ito, Fuminori; Furutake, Naoya; Saito, Shinobu; Onodera, Takahiro; Takeuchi, Tsuneo; Hayashi, Yoshihiro

2012-09-01

213

Stacking Interactions between Carbohydrate and Protein Quantified by Combination of Theoretical and Experimental Methods  

PubMed Central

Carbohydrate – receptor interactions are an integral part of biological events. They play an important role in many cellular processes, such as cell-cell adhesion, cell differentiation and in-cell signaling. Carbohydrates can interact with a receptor by using several types of intermolecular interactions. One of the most important is the interaction of a carbohydrate's apolar part with aromatic amino acid residues, known as dispersion interaction or CH/? interaction. In the study presented here, we attempted for the first time to quantify how the CH/? interaction contributes to a more general carbohydrate - protein interaction. We used a combined experimental approach, creating single and double point mutants with high level computational methods, and applied both to Ralstonia solanacearum (RSL) lectin complexes with ?-l-Me-fucoside. Experimentally measured binding affinities were compared with computed carbohydrate-aromatic amino acid residue interaction energies. Experimental binding affinities for the RSL wild type, phenylalanine and alanine mutants were ?8.5, ?7.1 and ?4.1 kcal.mol?1, respectively. These affinities agree with the computed dispersion interaction energy between carbohydrate and aromatic amino acid residues for RSL wild type and phenylalanine, with values ?8.8, ?7.9 kcal.mol?1, excluding the alanine mutant where the interaction energy was ?0.9 kcal.mol?1. Molecular dynamics simulations show that discrepancy can be caused by creation of a new hydrogen bond between the ?-l-Me-fucoside and RSL. Observed results suggest that in this and similar cases the carbohydrate-receptor interaction can be driven mainly by a dispersion interaction.

Necasova, Ivona; Mishra, Sushil Kumar; Komarek, Jan; Koca, Jaroslav

2012-01-01

214

Measurement of the K0 charge radius and a CP-violating asymmetry and a search for CP-violating E1 direct photon emission in the rare decay KL--> pi+ pi- e+ e-.  

PubMed

Using the complete KTeV data set of 5,241 candidate K(L)--> pi(+) pi(-) e(+) e(-) decays (including an estimated background of 204 +/- 14 events), we have measured the coupling g(CR)= 0.163 +/- 0.0149(stat) +/- 0.023(syst) of the CP conserving charge radius process and from it determined a K(0) charge radius of = [-0.077 +/- 0.007(stat) +/- 0.011(syst)]fm(2). We have determined a first experimental upper limit of 0.04 (90% C.L.) /g(e1)/ / /g(M1)/ of the couplings for the E1 and M1 direct photon emission processes. We also report the measurement of /g(M1)/ including a vector form factor /g(M1)/(1 + (a(1)/a(2))/((M(2)(p)-(M(2)(k))= 2M(K)E(gamma*)), where vector /g(M1)/= 1.11+/- 0.12(stat) +/- 0.08(syst) and a(1)/a(2) = [-0.744 +/- 0.027(stat) +/- 0.032(syst)] GeV(2)/c(2). Finally, a CP-violating asymmetry of [13.6 +/- 1.4(stat) +/- 1.5(syst)]% in the CP and T odd angle phi between the decay planes of the e(+) e(-) and pi(+) pi(-) pairs in the K(L) center of mass is reported. PMID:16605723

Abouzaid, E; Arenton, M; Barker, A R; Bellantoni, L; Bellavance, A; Blucher, E; Bock, G J; Cheu, E; Coleman, R; Corcoran, M D; Corti, G; Cox, B; Erwin, A R; Escobar, C O; Glazov, A; Golossanov, A; Gomes, R A; Gouffon, P; Hanagaki, K; Hsiung, Y B; Huang, H; Jensen, D A; Kessler, R; Kotera, K; Ledovskoy, A; McBride, P L; Monnier, E; Nelson, K S; Nguyen, H; Niclasen, R; Ping, H; Qi, X R; Ramberg, E J; Ray, R E; Ronquest, M; Santos, E; Shields, J; Slater, W; Smith, D; Solomey, N; Swallow, E C; Toale, P A; Tschirhart, R; Velissaris, C; Wah, Y W; Wang, J; White, H B; Whitmore, J; Wilking, M; Winstein, B; Winston, R; Worchester, E T; Worchester, M; Yamanaka, T; Zimmerman, E D; Zukanovich, R F

2006-03-17

215

Dalitz Plot Analyses of B- to D+ Pi- Pi-, B+ to Pi+ Pi- Pi+ and D(S)+ to Pi+ Pi- Pi+ at BaBar  

SciTech Connect

We report on the Dalitz plot analyses of B{sup -} {yields} D{sup +}{pi}{sup -}{pi}{sup -}, B{sup +} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup +} and D{sub s}{sup +} {yields} {pi}{sup +}{pi}{sup -}{sup +}. The Dalitz plot method and the most recent BABAR results are discussed.

Dong, Liaoyuan; /Iowa State U.

2012-04-10

216

2D depiction of nonbonding interactions for protein complexes.  

PubMed

A program called the 2D-GraLab is described for automatically generating schematic representation of nonbonding interactions across the protein binding interfaces. The input file of this program takes the standard PDB format, and the outputs are two-dimensional PostScript diagrams giving intuitive and informative description of the protein-protein interactions and their energetics properties, including hydrogen bond, salt bridge, van der Waals interaction, hydrophobic contact, pi-pi stacking, disulfide bond, desolvation effect, and loss of conformational entropy. To ensure these interaction information are determined accurately and reliably, methods and standalone programs employed in the 2D-GraLab are all widely used in the chemistry and biology community. The generated diagrams allow intuitive visualization of the interaction mode and binding specificity between two subunits in protein complexes, and by providing information on nonbonding energetics and geometric characteristics, the program offers the possibility of comparing different protein binding profiles in a detailed, objective, and quantitative manner. We expect that this 2D molecular graphics tool could be useful for the experimentalists and theoreticians interested in protein structure and protein engineering. PMID:18942722

Zhou, Peng; Tian, Feifei; Shang, Zhicai

2009-04-30

217

Stacked generalization  

Microsoft Academic Search

: This paper introduces stacked generalization, a scheme for minimizing the generalizationerror rate of one or more generalizers. Stacked generalization works by deducing the biases of thegeneralizer(s) with respect to a provided learning set. This deduction proceeds by generalizing ina second space whose inputs are (for example) the guesses of the original generalizers when taughtwith part of the learning set

David H. Wolpert

1992-01-01

218

Study Stack  

NSDL National Science Digital Library

Developed by John Weidner, the Study Stack concept basically assists individuals to memorize information about various subjects, including geography, history, math, languages, and science. Users of the site can select one of the existing stacks, which consists of virtual study cards allowing individuals to learn at their own pace until they are satisfied with their progress. What is also particularly novel about this learning tool is that data entered for customized study stacks can be automatically displayed as a matching game, a word search puzzle, or a hangman game. So far, the site contains dozens of study stacks for each subject, with the areas dedicated to math and science containing quite a number of rather helpful stacks. With its wide range of applications, this site will be very helpful to students at different age levels and teachers who may be seeking to develop a new study tool for any number of topics or themes within a subject area.

Weidner, John

219

Mesoscopic model parametrization of hydrogen bonds and stacking interactions of RNA from melting temperatures  

PubMed Central

Information about molecular interactions in DNA can be obtained from experimental melting temperature data by using mesoscopic statistical physics models. Here, we extend the technique to RNA and show that the new parameters correctly reproduce known properties such as the stronger hydrogen bonds of AU base pairs. We also were able to calculate a complete set of elastic constants for all 10 irreducible combinations of nearest neighbours (NNs). We believe that this is particularly useful as experimentally derived information about RNA elasticity is relatively scarce. The melting temperature prediction using the present model improves over those from traditional NN model, providing thus an alternative way to calculate these temperatures for RNA. Additionally, we calculated the site-dependent base pair oscillation to explain why RNA shows larger oscillation amplitudes despite having stronger AU hydrogen bonds.

Weber, Gerald

2013-01-01

220

Measurements of the branching fractions of B0-->K*0K+K-, B0-->K*0pi+K-, B0-->K*0K+pi-, and B0-->K*0pi+pi-  

Microsoft Academic Search

Branching fraction measurements of charmless B0-->K*0h1+h2- (h1,2=K, pi) decays are presented, using a data sample of 383×106 Upsilon(4S)-->BB¯ decays collected with the BABAR detector at the PEP-II asymmetric-energy B-meson factory at SLAC. The results are B(B0-->K*0K+K-)=(27.5±1.3±2.2)×10-6, B(B0-->K*0pi+K-)=(4.6±1.1±0.8)×10-6, and B(B0-->K*0pi+pi-)=(54.5±2.9±4.3)×10-6. The first errors quoted are statistical and the second are systematic. An upper limit is set for B(B0-->K*0K+pi-)<2.2×10-6 at 90% confidence

B. Aubert; M. Bona; D. Boutigny; 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; 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; I. L. Osipenkov; M. T. Ronan; K. Tackmann; T. Tanabe; W. A. Wenzel; P. Del Amo Sanchez; C. M. Hawkes; 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; A. Khan; 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; 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; S. D. Foulkes; J. W. Gary; F. Liu; O. Long; B. C. Shen; G. M. Vitug; L. Zhang; 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; T. Schalk; B. A. Schumm; A. Seiden; M. G. Wilson; L. O. Winstrom; E. Chen; C. H. Cheng; 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; S. Chen; W. T. Ford; J. F. Hirschauer; A. Kreisel; M. Nagel; U. Nauenberg; A. Olivas; J. G. Smith; K. A. Ulmer; S. R. Wagner; J. Zhang; A. M. Gabareen; A. Soffer; W. H. Toki; R. J. Wilson; F. Winklmeier; 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; F. Muheim; S. Playfer; A. I. Robertson; J. E. Watson; Y. Xie; 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; J. Wu; R. S. Dubitzky; J. Marks; S. Schenk; U. Uwer; D. J. Bard; P. D. Dauncey; R. L. Flack; 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; G. Grosdidier; A. Höcker; V. Lepeltier; F. Le Diberder; A. M. Lutz; S. Pruvot; S. Rodier; 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; K. C. Schofield; 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; J. Allison; D. Bailey; 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; G. Blaylock; 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; Y. Zheng; 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; F. Fabozzi; 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; 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

2007-01-01

221

Measurement of cos2beta in B;{0}-->D;{(*)}h;{0} decays with a time-dependent Dalitz plot analysis of D-->K_{s};{0}pi;{+}pi;{-}.  

PubMed

We study the time-dependent Dalitz plot of D-->K_{S};{0}pi;{+}pi;{-} in B;{0}-->D;{(*)}h;{0} decays, where h;{0} is a pi;{0}, eta, eta;{'}, or omega meson and D;{*}-->Dpi;{0}, using a data sample of 383x10;{6} Upsilon(4S)-->BB[over ] decays collected with the BABAR detector. We determine cos2beta=0.42+/-0.49+/-0.09+/-0.13, sin2beta=0.29+/-0.34+/-0.03+/-0.05, and |lambda|=1.01+/-0.08+/-0.02, where the first error is statistical, the second is the experimental systematic uncertainty, and the third, where given, is the Dalitz model uncertainty. Assuming the world average value for sin2beta and |lambda|=1, cos2beta>0 is preferred over cos2beta<0 at 86% confidence level. PMID:18233357

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

2007-12-07

222

Branching Fractions and CP Asymmetries in B0-->pi0pi0, B+-->pi+pi0, and B+-->K+pi0 Decays and Isospin Analysis of the B>pipi System  

Microsoft Academic Search

Based on a sample of 227×106 BB¯ pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction B(B0-->pi0pi0)=(1.17±0.32±0.10)×10-6, and the asymmetry Cpi0pi0=-0.12±0.56±0.06. The B0-->pi0pi0 signal has a significance of 5.0sigma. We also measure B(B+-->pi+pi0)=(5.8±0.6±0.4)×10-6, B(B+-->K+pi0)=(12.0±0.7±0.6)×10-6, and the charge asymmetries Api+pi0=-0.01±0.10±0.02 and AK+pi0=0.06±0.06±0.01. Using isospin relations, we find an upper bound on

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; T. Schroeder; M. Steinke; J. T. Boyd; 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. 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; R. Nogowski; S. Otto; A. Petzold; 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; 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; 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; 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; R. Ter-Antonyan; Q. K. Wong; J. Brau; R. Frey; O. Igonkina; M. Lu; C. T. Potter; N. B. Sinev; D. Strom

2005-01-01

223

New 3-D supramolecular networks formed via hydrogen bonding and ? ? stacking interactions: Synthesis, characterization and crystal structures  

NASA Astrophysics Data System (ADS)

Two new 3-D supramolecular networks, {[Cd2(dap)2(tp)2(H2O)2] · 2H2O}n (1) and {[Cu3(tp)2(dpq)2(OH)2]}n (2) (tp, terephthalate; dap, 5,6-diamino-1,10-phenanthroline; dpq, dipyrido[3,2-d:2?,3?-f]quinoxaline), have been synthesized and structurally characterized by X-ray diffraction. Single-crystal X-ray analyses show that complex 1 is constructed by CdII and mixed ligands of daps and tps to form a 1-D polymer chain. In complex 2, a tetra-coordinated CuII and two penta-coordinated CuII are linked by two bridging hydroxyl oxygen atoms to form a Cu3(OH)2(dpq)2 unit, which is a noteworthy feature in the framework, and such units are connected through tp to form a 2-D lamellar polymer. Moreover, complexes 1 and 2 are further extended into 3-D supramolecular networks by H-bonding and ? ? stacking interactions, respectively.

Wang, Xiu-Li; Lin, Hong-Yan; Hu, Tong-Liang; Tian, Jin-Lei; Bu, Xian-He

2006-10-01

224

Enthalpy (?H) and Entropy (?S) for ?-Stacking Interactions in near-Sandwich Configurations: The Relative Importance of Electrostatic, Dispersive, and Charge-Transfer Effects  

PubMed Central

Interactions between two aromatic rings with various substituents in a near-sandwich configuration have been quantitatively studied using the triptycene derived molecular models. This model system allows a stacking arrangement of two arenes to assume a near perfect face-to-face configuration in its ground state conformation. Comparing to our previous study of the parallel displaced configuration, repulsive interactions are predominant for most arenes currently studied. However, if one arene is strongly electron-deficient (Ar2 = pentafluorobenzoate), attractive interactions were observed regardless of the character of the other arene (Ar1). For stacking interactions between Me2NC6H4 and C6F5CO groups, a ?H of ?1.84 ± 0.2 kcal/mol and a ?S of ?2.9 ± 0.8 cal/mol·K were determined. The general trend in the attractive stacking interaction towards a pentafluorobenzoate is Me2NC6H4 > Me3C6H2> Me2C6H3> MeC6H4 > MeOC6H4 > C6H5 > O2NC6H4. The observed trend is consistent with a donor-acceptor relationship and the acceptor is a C6F5CO group.

Xue, Xiaowen; Zou, Yan

2008-01-01

225

Combining in situ transmission electron microscopy and molecular dynamics computer simulations to reveal the interaction mechanisms of dislocations with stacking-fault tetrahedron in nuclear materials.  

PubMed

In situ straining experiments conducted in a transmission electron microscope have been performed to reveal how dislocations interact with and annihilate isolated stacking-fault tetrahedra, common defect clusters in irradiated face-centered cubic metals. Comparison of the experimental results with the predictions from molecular dynamics computer simulations shows some similarities and some striking differences. The comparison suggests challenges for the simulations and demonstrates how, despite the disparity in operational parameters, the simulations can be used to interpret experimental results. PMID:19189314

Matsukawa, Yoshitaka; Briceno, Martha; Robertson, Ian M

2009-03-01

226

Geometrical and structural characteristics of stacking fault-antiphase-boundary interactions in the massive gamma m phase in a quenched Ti46.5 at.% Al alloy  

Microsoft Academic Search

The geometrical and structural characteristics of interactions between stacking faults (SFs) and antiphase boundaries (APBs) in the massive gamma (gammam) phase, formed in a Ti-46.5 at.% Al alloy quenched from the hightemperature alpha phase, were analysed using atomic models. The analysis confirms the transmission electron microscopy observations that SFs bound by 1\\/6 Shockley partial dislocations of all possible types present

Ping Wang; Mukul Kumar; Vijay K. Vasudevan

2000-01-01

227

Stacking Up  

ERIC Educational Resources Information Center

Chimneys and stacks appear to be strong and indestructible, but chimneys begin to deteriorate from the moment they are built. Early on, no signs are apparent; but deterioration accelerates in subsequent years, and major repairs are soon needed instead of minor maintenance. With proper attention, most structures can be repaired and continue to…

Naylor, Jim

2005-01-01

228

Stacking Up  

ERIC Educational Resources Information Center

|Chimneys and stacks appear to be strong and indestructible, but chimneys begin to deteriorate from the moment they are built. Early on, no signs are apparent; but deterioration accelerates in subsequent years, and major repairs are soon needed instead of minor maintenance. With proper attention, most structures can be repaired and continue to…

Naylor, Jim

2005-01-01

229

Interaction potential for indium phosphide: a molecular dynamics and first-principles study of the elastic constants, generalized stacking fault and surface energies.  

PubMed

Indium phosphide is investigated using molecular dynamics (MD) simulations and density-functional theory calculations. MD simulations use a proposed effective interaction potential for InP fitted to a selected experimental dataset of properties. The potential consists of two- and three-body terms that represent atomic-size effects, charge-charge, charge-dipole and dipole-dipole interactions as well as covalent bond bending and stretching. Predictions are made for the elastic constants as a function of density and temperature, the generalized stacking fault energy and the low-index surface energies. PMID:21817375

Branicio, Paulo Sergio; Rino, José Pedro; Gan, Chee Kwan; Tsuzuki, Hélio

2009-01-29

230

Influence of Secondary Interactions at Graphene-Based Surfaces on the Dynamic and Mechanical Properties in Nanostructured Systems  

NASA Astrophysics Data System (ADS)

Graphene, a single atom thick sheet of densely packed carbon atoms, has gained significant interest in nanostructured materials because of its exceptional mechanical, electrical, thermal, and optical properties. Because graphene nanosheets and graphene-based nanoparticles present enormous surface areas relative to their volume, interfacial interactions at graphene-based surfaces yield a significant impact on the properties of nanostructured systems. In this dissertation, secondary interactions (e.g., pi-pi interactions and hydrogen-bonding) at graphene-based surfaces in composite systems and freestanding nanoparticle films were studied, with a focus on their influence over mechanical and dynamic properties. In polymer nanocomposite systems containing carbon nanotubes, the region of altered chain dynamics near nanotube surfaces was examined as a function of crosslink density by dynamic scanning calorimetry. Three mechanisms of altered dynamics were postulated in crosslinked systems, with diminished percolation of these effects at increasing crosslink densities due to restrictions in the length scale of chain rearrangements. In-depth fracture analysis of a polymer nanocomposite containing carbon nanofibers with a stacked-cup structure pointed to the first observation of sacrificialbonding behavior in the inorganic phase of composite systems. Either continuous unraveling or discrete splaying of the coiled graphene sheets were found to dissipate energy by overcoming the relatively weak pi-pi interactions between stacked layers, yielding significant toughening at low nanofiber contents. Incorporation of these nanofibers into carbon-fiber-reinforced composites yielded mechanical enhancements in matrix-dominated properties while improving transverse electrical conductivity. Finally, the formation mechanism of freestanding graphene oxide films (or papers) fabricated by vacuum-assisted filtration of aqueous colloidal suspensions was examined as a function of both film thickness and nanosheet carbon-to-oxygen (C/O) ratio. The former was determined to impact the robustness of interlamellar contacts by means of varying degrees of compaction, resulting in brittle and tough films for intimate and loose interlamellar contacts, respectively. The mechanical response of GO papers was found to be fairly insensitive to oxidation state at low C/O ratios due to oversaturation of the hydrogen-bonding network, whereas loss of mechanical integrity was found at high C/O ratios due to lower availability of surface functional groups to form a robust hydrogen-bonding network.

Palmeri, Marc J.

231

Final state interactions in the B meson decay into two pions  

SciTech Connect

We estimate final state interactions in the B-meson decays into two pions by the Regge model. We take into account Pomeron exchange and the leading Regge trajectories that can be related to the final state. In the B {yields} {pi}0{pi}0 and B {yields} {pi}+{pi}- channels the effect produces a better agreement between theory and experiment.

Deandrea, Aldo [Universite de Lyon 1, Institut de Physique Nucleaire, Villeurbanne Cedex (France); Ladisa, Massimo; Laporta, Vincenzo [Dipartimento di Fisica dell'Universita di Bari (Italy); INFN, Sezione di Bari (Italy); Nardulli, Giuseppe [Dipartimento di Fisica dell'Universita di Bari (Italy); INFN, Sezione di Bari (Italy); PH Department, TH Unit, CERN, 1211 Geneva 23 (Switzerland); Santorelli, Pietro [Dipartimento di Scienze Fisiche, Universita di Napoli 'Federico II' (Italy); INFN, Sezione di Napoli (Italy)

2006-01-12

232

Evidence for direct CP violation in the decay B{sup {+-}{yields}D(*)}K{sup {+-}}, D{yields}K{sub S}{sup 0{pi}+{pi}-} and measurement of the CKM phase {phi}{sub 3}  

SciTech Connect

We present a new measurement of the unitarity triangle angle {phi}{sub 3} using a Dalitz plot analysis of the K{sub S}{sup 0{pi}+{pi}-} decay of the neutral D meson produced in B{sup {+-}{yields}D(*)}K{sup {+-}} decays. The method exploits the interference between D{sup 0} and D{sup 0} to extract the angle {phi}{sub 3}, strong phase {delta}, and the ratio r of suppressed and allowed amplitudes. We apply this method to a 605 fb{sup -1} data sample collected by the Belle experiment. The analysis uses three decays: B{sup {+-}{yields}D}K{sup {+-}}, and B{sup {+-}{yields}D}*K{sup {+-}}with D*{yields}D{pi}{sup 0} and D*{yields}D{gamma}, as well as the corresponding charge-conjugate modes. From a combined maximum likelihood fit to the three modes, we obtain {phi}{sub 3}=78.4 deg. (+10.8 deg./-11.6 deg.){+-}3.6 deg. (syst){+-}8.9 deg. (model). CP conservation in this process is ruled out at the confidence level (1-CL)=5x10{sup -4}, or 3.5 standard deviations.

Poluektov, A.; Bondar, A.; Arinstein, K.; Aulchenko, V.; Eidelman, S.; Epifanov, D.; Gabyshev, N.; Garmash, A.; Kuzmin, A.; Shebalin, V.; Shwartz, B.; Usov, Y.; Vinokurova, A.; Zhilich, V.; Zhulanov, V.; Zyukova, O. [Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation); Novosibirsk State University, Novosibirsk (Russian Federation); Yabsley, B. D.; Bakich, A. M.; McOnie, S.; Varvell, K. E. [School of Physics, University of Sydney, NSW 2006 (Australia)

2010-06-01

233

Branching fractions and CP asymmetries in B0-->pi0pi0, B+-->pi+pi0, and B+-->K+pi0 decays and isospin analysis of the B-->pipi system.  

PubMed

Based on a sample of 227 x 10(6) BB pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction B(B0-->pi(0)pi(0))=(1.17+/-0.32+/-0.10)x10(-6), and the asymmetry Cpi(0)(pi(0))=-0.12+/-0.56+/-0.06. The B0-->pi(0)pi(0) signal has a significance of 5.0 sigma. We also measure B(B+-->pi(+)pi(0))=(5.8+/-0.6+/-0.4)x10(-6), B(B+-->K+pi(0))=(12.0+/-0.7+/-0.6)x10(-6), and the charge asymmetries Api(+)(pi(0))=-0.01+/-0.10+/-0.02 and AK+(pi(0))=0.06+/-0.06+/-0.01. Using isospin relations, we find an upper bound on the angle difference |alpha-alpha(eff)| of 35 degrees at the 90% C.L. PMID:15904359

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; Schroeder, T; 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; 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; 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; Nogowski, R; Otto, S; Petzold, A; 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; 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; 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; 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; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Voci, C; Benayoun, M; Briand, H; Chauveau, J

2005-05-12

234

Contribution of Partial Charge Interactions and Base Stacking to the Efficiency of Primer Extension at and beyond Abasic Sites in DNA  

SciTech Connect

During DNA synthesis, base stacking and Watson-Crick (WC) hydrogen bonding increase the stability of nascent base pairs when they are in a ternary complex. To evaluate the contribution of base stacking to the incorporation efficiency of dNTPs when a DNA polymerase encounters an abasic site, we varied the penultimate base pairs (PBs) adjacent to the abasic site using all 16 possible combinations. We then determined pre-steady-state kinetic parameters with an RB69 DNA polymerase variant and solved nine structures of the corresponding ternary complexes. The efficiency of incorporation for incoming dNTPs opposite an abasic site varied between 2- and 210-fold depending on the identity of the PB. We propose that the A rule can be extended to encompass the fact that DNA polymerase can bypass dA/abasic sites more efficiently than other dN/abasic sites. Crystal structures of the ternary complexes show that the surface of the incoming base was stacked against the PB's interface and that the kinetic parameters for dNMP incorporation were consistent with specific features of base stacking, such as surface area and partial charge-charge interactions between the incoming base and the PB. Without a templating nucleotide residue, an incoming dNTP has no base with which it can hydrogen bond and cannot be desolvated, so that these surrounding water molecules become ordered and remain on the PB's surface in the ternary complex. When these water molecules are on top of a hydrophobic patch on the PB, they destabilize the ternary complex, and the incorporation efficiency of incoming dNTPs is reduced.

Xia, Shuangluo; Vashishtha, Ashwani; Bulkley, David; Eom, Soo Hyun; Wang, Jimin; Konigsberg, William H. (Yale); (Gwangju)

2012-08-31

235

Cadmium(II) iodide and thiocyanate complexes adopted by polycyclic 1,4-bis(pyridazin-4-yl)benzene: interplay of coordination and ?-? stacking interactions.  

PubMed

New complexes containing the 1,4-bis(pyridazin-4-yl)benzene ligand, namely diaquatetrakis[1,4-bis(pyridazin-4-yl)benzene-?N(2)]cadmium(II) hexaiodidodicadmate(II), [Cd(C14H10N4)4(H2O)2][Cd2I6], (I), and poly[[?-1,4-bis(pyridazin-4-yl)benzene-?(2)N(2):N(2')]bis(?-thiocyanato-?(2)N:S)cadmium(II)], [Cd(NCS)2(C14H10N4)]n, (II), demonstrate the adaptability of the coordination geometries towards the demands of slipped ?-? stacking interactions between the extended organic ligands. In (I), the discrete cationic [Cd-N = 2.408?(3) and 2.413?(3)?Å] and anionic [Cd-I = 2.709?(2)-3.1201?(14)?Å] entities are situated across centres of inversion. The cations associate via complementary O-H...N(2') hydrogen bonding [O...N = 2.748?(4) and 2.765?(4)?Å] and extensive triple ?-? stacking interactions between pairs of pyridazine and phenylene rings [centroid-centroid distances (CCD) = 3.782?(4)-4.286?(3)?Å] to yield two-dimensional square nets. The [Cd2I6](2-) anions reside in channels generated by packing of successive nets. In (II), the Cd(II) cation lies on a centre of inversion and the ligand is situated across a centre of inversion. A two-dimensional coordination array is formed by crosslinking of linear [Cd(?-NCS)2]n chains [Cd-N = 2.3004?(14)?Å and Cd-S = 2.7804?(5)?Å] with N(2):N(2')-bidentate organic bridges [Cd-N = 2.3893?(12)?Å], which generate ?-? stacks by double-slipped interactions between phenylene and pyridazine rings [CCD = 3.721?(2)?Å]. PMID:23459341

Degtyarenko, Anna S; Domasevitch, Konstantin V

2013-02-05

236

Correlations between high-momentum mesons in p+p. -->. pi. +. pi. +X at s/sup 1/2/=63 GeV  

SciTech Connect

In pp collisions at ..sqrt.. s=62.3 GeV where each proton fragments into at least one low p/sub T/, high-x pion, no significant correlations for ..pi../sup +/..pi../sup +/, ..pi../sup +/..pi../sup -/ and ..pi../sup -/..pi../sup -/ are found, thus excluding quark exchange with Brodsky-Gunion counting rules as the dominant interaction mechanism. This, together with the experimental x dependence of single-particle spectra, suggests the introduction of a new counting rule, which is discussed.

Bobbink, G.J.; van Driel, M.A.; Erne, F.C.; Langeveld, W.G.J.; Kooijman, P.M.; Sens, J.C.; Timmer, J.; Favart, D.; Leleux, P.; Block, M.M.; Campanini, R.; Ludwig, H.W.; Botje, M.A.; van Wezep, D.

1980-01-21

237

Stacking interaction study of trans-resveratrol (trans-3,5,4'-trihydroxystilbene) in solution by Nuclear Magnetic Resonance and Fourier Transform Infrared Spectroscopy.  

PubMed

Interactions between aromatic rings or other unsaturated systems, including pi-stacking and face-to-edge complexes, are the origin of many phenomena in both organic and biological chemistry. It is well known that these interactions play an important role in the stabilization of the stereo-structure of DNA and the tertiary structure of many proteins.Trans-resveratrol (trans-3,5,4'-trihydroxystilbene, trans-RSV) is a phytoalexin found in Vitis sp. and in many other plants and food products and has received much attention because of its possible positive health benefits. In this work, the pi-stacking interaction of trans-RSV was studied by nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy. In particular, the proton chemical shift dependence of the RSV concentration in the range 2 x 10(-2) - 1 x 10(-5) M and temperature were analysed. Moreover, the dynamics of the supramolecular aggregates were studied by nuclear spin relaxation data. PMID:18324741

Bonechi, Claudia; Martini, Silvia; Magnani, Agnese; Rossi, Claudio

2008-07-01

238

{pi}K interaction effects on CP violation in B (right arrow) K {pi} {sup + }{pi}{ sup -} decays.  

SciTech Connect

The authors apply QCD factorization to the quasi two-body B {yields} (K{pi}){pi} decays where the (K{pi})-pair effective mass is limited to 1.8 GeV. Our strong interaction phases constrained by theory and {pi}K experimental data yield useful information for studies of CP violation.

Loiseau, B.; El-Bennich, B.; Furman, A.; Kaminski, R.; Lesniak, L.; Moussallam, B.; Physics; LPNHE, Univ. Pierre et Marie Curie; The Henryk Niewodniczanski Inst. of Nucler Physics; IPN, CNRS /Univ. Paris; ul.Bronowicka 85 /26

2009-04-30

239

Scalar resonances in a unitary {pi}{pi} S-wave model for D{sup +}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup +}  

SciTech Connect

We propose a model for D{sup +}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup +} decays following experimental results which indicate that the two-pion interaction in the S wave is dominated by the scalar resonances f{sub 0}(600)/{sigma} and f{sub 0}(980). The weak decay amplitude for D{sup +}{yields}R{pi}{sup +}, where R is a resonance that subsequently decays into {pi}{sup +}{pi}{sup -}, is constructed in a factorization approach. In the S wave, we implement the strong decay R{yields}{pi}{sup +}{pi}{sup -} by means of a scalar form factor. This provides a unitary description of the pion-pion interaction in the entire kinematically allowed mass range m{sub {pi}}{sub {pi}}{sup 2} from threshold to about 3 GeV{sup 2}. In order to reproduce the experimental Dalitz plot for D{sup +}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup +}, we include contributions beyond the S wave. For the P wave, dominated by the {rho}(770){sup 0}, we use a Breit-Wigner description. Higher waves are accounted for by using the usual isobar prescription for the f{sub 2}(1270) and {rho}(1450){sup 0}. The major achievement is a good reproduction of the experimental m{sub {pi}}{sub {pi}}{sup 2} distribution, and of the partial as well as the total D{sup +}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup +} branching ratios. Our values are generally smaller than the experimental ones. We discuss this shortcoming and, as a by-product, we predict a value for the poorly known D{yields}{sigma} transition form factor at q{sup 2}=m{sub {pi}}{sup 2}.

Boito, D. R. [Grup de Fisica Teorica and IFAE, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona) (Spain); Instituto de Fisica, Universidade de Sao Paulo, C.P. 66318, 05315-970, Sao Paulo, SP (Brazil); Dedonder, J.-P.; Loiseau, B. [Laboratoire de Physique Nucleaire et de Hautes Energies (IN2P3-CNRS-Universites Paris 6 et 7), Groupe Theorie, Universite P. and M. Curie, 4 Place Jussieu, F-75252 Paris (France); El-Bennich, B. [Laboratoire de Physique Nucleaire et de Hautes Energies (IN2P3-CNRS-Universites Paris 6 et 7), Groupe Theorie, Universite P. and M. Curie, 4 Place Jussieu, F-75252 Paris (France); Physics Division, Argonne National Laboratory, Argonne, Illinois, 60439 (United States); Leitner, O. [Laboratoire de Physique Nucleaire et de Hautes Energies (IN2P3-CNRS-Universites Paris 6 et 7), Groupe Theorie, Universite P. and M. Curie, 4 Place Jussieu, F-75252 Paris (France); INFN, Laboratori Nazionali di Frascati, Via E. Fermi 40, I-00044 Frascati (Italy)

2009-02-01

240

Glucose-?-CD interaction assisted ACN field-amplified sample stacking in CZE for determination of trace amlodipine in beagle dog plasma.  

PubMed

A simple, sensitive and low-cost method using CE coupled with glucose-?-CD interaction assisted ACN stacking technique has been developed for quantification of trace amlodipine in dog plasma. The plasma samples were extracted with methyl tert-butyl ether. The separation was performed at 25°C in a 31.2 cm × 75 ?m fused-silica capillary with an applied voltage of 15 kV. The BGE was composed of 6.25 mM borate/25 mM phosphate (pH 2.5) and 5 mg/mL glucose-?-CD. The detection wavelength was 200 nm. Because CD could diminish the interaction between drugs and matrix, and derivation groups of CD play an important role in separation performance, the effects of ?-CD, and its derivatives on the separation were studied at several concentrations (0, 2.5, 5.0, 10.0 mg/mL). In this study, organic solvent field-amplified sample stacking technique in combination with glucose-?-CD enhanced the sensitivity about 60-70 folds and glucose-?-CD could effectively improve the peak shape. All the validation data, such as accuracy, precision extraction recovery, and stability, were within the required limits. The calibration curve was linear for amlodipine from 1 to 200 ng/mL. The method developed was successfully applied to the pharmacokinetic studies of amlodipine besylate in beagle dogs. PMID:23495256

Li, Ji; Li, You; Zhang, Wenting; Chen, Zhao; Fan, Guorong

2013-04-26

241

Edge states in stacked nanographene  

NASA Astrophysics Data System (ADS)

Nanocarbon materials are investigated intensively. In this paper, the edge-state in nanographene materials with zigzag edges is studied theoretically. In particular, while the inter-layer interactions are considered, we prove that edge states exist at the energy of the Dirac point in the doubly stacked nanographene, and in the case of the infinitely-wide lower layer case. This property applies both for the A-B and A-C stackings.

Harigaya, Kikuo

2012-12-01

242

Cross Sections for the Reactions e+e to K+ K- pi+pi-, K+ K- pi0pi0, and K+ K- K+ K- Measured Using Initial-State Radiation  

SciTech Connect

We study the processes e{sup +}e{sup -} {yields} K{sup +}K{sup -}{pi}{sup +}{pi}-{gamma}, K{sup +}K{sup -}{pi}{sup 0}{pi}{sup 0}{gamma}, and K{sup +}K{sup -}K{sup +}K{sup -}{gamma}, where the photon is radiated from the initial state. About 84000, 8000, and 4200 fully reconstructed events, respectively, are selected from 454 fb{sup -1} of BABAR data. The invariant mass of the hadronic final state defines the e{sup +}e{sup -} center-of-mass energy, so that the K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}{gamma} data can be compared with direct measurements of the e{sup +}e{sup -} {yields} K{sup +}K{sup -}{pi}{sup +}{pi}{sup -} reaction. No direct measurements exist for the e{sup +}e{sup -} {yields} K{sup +}K{sup -}{pi}{sup 0}{pi}{sup 0} or e{sup +}e{sup -} {yields} K{sup +}K{sup -}K{sup +}K{sup -} reactions, and we present an update of our previous result with doubled statistics. Studying the structure of these events, we find contributions from a number of intermediate states, and extract their cross sections. In particular, we perform a more detailed study of the e{sup +}e{sup -} {yields} {phi}(1020){pi}{pi}{gamma} reaction, and confirm the presence of the Y (2175) resonance in the {phi}(1020)f{sub 0}(980) and K{sup +}K{sup -} f{sub 0}(980) modes. In the charmonium region, we observe the J/{psi} in all three final states and in several intermediate states, as well as the {phi}(2S) in some modes, and measure the corresponding branching fractions.

Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Martinelli, M.; /INFN, Trieste /Trieste U.; Milanes, D.A.; /INFN, Trieste /Trieste U.; Palano, A.; /INFN, Trieste /Trieste U.; Pappagallo, M.; /INFN, Trieste /Trieste U. /INFN, Bari /Bari U. /Bari U. /INFN, Bari; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Brown, D.N.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; /LBL, Berkeley /UC, Berkeley; Koch, H.; Schroeder, T.; /Ruhr U., Bochum; Asgeirsson, D.J.; /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, Trieste /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Ferrara /Ferrara U. /Frascati /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Genoa /Genoa U. /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. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Naples /Naples U. /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Padua /Padua U. /Paris U., VI-VII /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Perugia /Perugia U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Pisa /Princeton U. /INFN, Trieste /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /INFN, Trieste /INFN, Trieste /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, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /INFN, Trieste /Trieste U. /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

2011-08-19

243

yDNA versus yyDNA pyrimidines: computational analysis of the effects of unidirectional ring expansion on the preferred sugar-base orientation, hydrogen-bonding interactions and stacking abilities.  

PubMed

The properties of natural, y- and yy-pyrimidines are compared using computational (B3LYP, MP2) methods. Ring expansion upon incorporation of benzene or naphthalene into the natural pyrimidines affects the preferred orientation of the base about the glycosidic bond in the corresponding nucleoside to a similar extent. Specifically, although the natural pyrimidines preferentially adopt the anti orientation with respect to the 2'-deoxyribose moiety, the expanded analogues will likely display (anti/syn) conformational heterogeneity, which may lead to alternate hydrogen-bonding modes in double-stranded duplexes. Nevertheless, the A:T Watson-Crick hydrogen-bond strengths do not significantly change upon base expansion, while the G:C interaction energy is slightly strengthened upon incorporation of either expanded pyrimidine. The largest effect of base expansion occurs in the stacking energies. Specifically, the maximum (most negative) stacking energies in isolated dimers formed by aligning the nucleobase centers of mass can be increased up to 45% by inclusion of a single y-pyrimidine and up to 55% by consideration of a yy-pyrimidine. Similar increases in the stacking interactions are found when a simplified duplex model composed of two stacked (hydrogen-bonded) base pairs is considered, where both the intrastrand and interstrand stacking interactions can be increased and the effects are more pronounced for the yy-pyrimidines. Moreover, the total stability (sum of all hydrogen-bonding and stacking interactions) is greater for duplexes containing expanded yy-pyrimidines compared to y-pyrimidines, which is mainly due to enhanced stacking interactions. Thus, our calculations suggest that multiple unidirectional increases in the size of the nucleobase spacer can continuously enhance the stability of expanded duplexes. PMID:23303174

Sharma, Purshotam; Lait, Linda A; Wetmore, Stacey D

2013-01-10

244

Metal-organic frameworks exhibiting strong anion-pi interactions.  

PubMed

Coordination polymers offer a significant potential for applications in adsorption, guest and anion recognition and sensing. Their structure commonly provides binding sites for such specific interactions as pi-pi stacking and XH...pi hydrogen bonding. The latter reflects the ability of the pi-cloud to interact with positively polarized atoms. An electrostatic interaction between anionic species and electron deficient heterocycles, which parallels the above binding scheme, is also possible and very recently the existence of anion-pi interactions was proved in the solid state and in solution. This effect may be significant also for biomolecule/solution interfaces, as it occurs in protein structures. In fact, such interactions could be especially relevant for host-guest chemistry of coordination polymers, particularly for functionalization of hydrophobic crystal cavities and for the design of geometrically rigid anion receptors. However, typical electron deficient heterocycles such as 1,3,5-triazines and 1,2,4,5-tetrazines are very weak donors and they are hardly suitable for bridging metal ions and the generation of coordination frameworks. As a system that combines efficient donor properties towards transition metal ions and a pronounced ability for anion-pi interactions we have developed unsubstituted pyridazino[4,5-d]pyridazine, which was readily accessible by a novel one-pot synthesis involving inverse electron demand Diels-Alder cycloaddition (Scheme 1). Unusual anion binding properties of the ligand may be clearly related to its electron-deficiency (LUMO energy -1.591 vs. -0.288 eV for the parent pyridazine), influenced also by N-coordination to such Lewis acids as metal ions. PMID:17345736

Gural'skiy, Ilya A; Solntsev, Pavlo V; Krautscheid, Harald; Domasevitch, Konstantin V

2006-12-14

245

A Survey of Aspartate-Phenylalanine and Glutamate-Phenylalanine Interactions in the Protein Data Bank: Searching for Anion-pi Pairs  

SciTech Connect

Protein structures are stabilized using noncovalent interactions. In addition to the traditional noncovalent interactions, newer types of interactions are thought to be present in proteins. One such interaction, an anion-{pi} pair, in which the positively charged edge of an aromatic ring interacts with an anion, forming a favorable anion-quadrupole interaction, has been previously proposed [Jackson, M. R., et al. (2007) J. Phys. Chem. B111, 8242-8249]. To study the role of anion-{pi} interactions in stabilizing protein structure, we analyzed pairwise interactions between phenylalanine (Phe) and the anionic amino acids, aspartate (Asp) and glutamate (Glu). Particular emphasis was focused on identification of Phe-Asp or -Glu pairs separated by less than 7 {angstrom} in the high-resolution, nonredundant Protein Data Bank. Simplifying Phe to benzene and Asp or Glu to formate molecules facilitated in silico analysis of the pairs. Kitaura-Morokuma energy calculations were performed on roughly 19000 benzene-formate pairs and the resulting energies analyzed as a function of distance and angle. Edgewise interactions typically produced strongly stabilizing interaction energies (-2 to -7.3 kcal/mol), while interactions involving the ring face resulted in weakly stabilizing to repulsive interaction energies. The strongest, most stabilizing interactions were identified as preferentially occurring in buried residues. Anion-{pi} pairs are found throughout protein structures, in helices as well as {beta} strands. Numerous pairs also had nearby cation-{pi} interactions as well as potential {pi}-{pi} stacking. While more than 1000 structures did not contain an anion-{pi} pair, the 3134 remaining structures contained approximately 2.6 anion-{pi} pairs per protein, suggesting it is a reasonably common motif that could contribute to the overall structural stability of a protein.

Philip, Vivek M [ORNL; Harris, Jason B [ORNL; Adams, Rachel M [ORNL; Nguyen, Don [University of Tennessee; Spiers, Jeremy D [ORNL; Baudry, Jerome Y [ORNL; Howell, Elizabeth E [ORNL; Hinde, Robert J [ORNL

2011-01-01

246

Haem-linked interactions in horseradish peroxidase revealed by spectroscopic analysis of the Phe-221-->Met mutant.  

PubMed Central

A gene encoding a Phe-221-to-Met substitution in the haem enzyme horseradish peroxidase has been constructed and expressed in Escherichia coli. In the wild-type enzyme the side chain of Phe-221 is tightly stacked against the imidazole ring of His-170, which provides the only axial ligand to the haem iron atom. The Phe-221-->Met enzyme is active, and forms characteristic complexes with typical peroxidase ligands (CO, cyanide, fluoride), and with benzhydroxamic acid. Significant differences between the mutant and wild-type enzymes can be detected spectroscopically. These include a change in the Fe(III) resting state of the enzyme to an unusual quantum mechanically mixed-spin haem species, a marked decrease in the pK(a) of the alkaline transition and a reduction in enzyme stability at alkaline pH for both Fe(III) and Fe(II) forms. The perturbation of the haem pocket in the mutant can be attributed to several factors, including the increased steric freedom and solvent accessibility of the His-170 ligand, as indicated by (1)H-NMR data, and the loss of the pi-pi interaction between His-170 and Phe-221.

Howes, B D; Veitch, N C; Smith, A T; White, C G; Smulevich, G

2001-01-01

247

Exchange interactions through ?-? stacking in the lamellar compound [{Cu(bipy)(en)}{Cu(bipy)(H2O)}{VO3}4]n.  

PubMed

Structural, magnetic, and powder and single-crystal electron paramagnetic resonance (EPR) studies were performed on [{Cu(bipy)(en)}{Cu(bipy)(H(2)O)}{VO(3)}(4)](n) (bipy = 2,2'-bipyridine, en = ethylenediamine), which is a new copper-vanadium hybrid organic-inorganic compound containing Cu(II) and V(V) centers. The oxovanadium units provide an anionic scaffolding to the structure, where two types of Cu(II) coordination modes, octahedral (Cu1) and square pyramidal (Cu2), contribute to the magnetic properties. The crystal structure contains layers including Cu1 and Cu2 ions, separated by stacked arrangements of 2,2'-bipyridine molecules. Each type of Cu(II) ion in these layers forms parallel spin chains described by exchange coupling parameters J(1) and J(2) for Cu1 and Cu2, respectively (exchange couplings defined as H(ex)(i,j) = -J(ij)S(i)S(j)), which, for necessity, are assumed to be equal to J. These chains are coupled by much weaker Cu1-Cu2 exchange interactions J(3) connecting neighbor Cu1 and Cu2 ions within a layer, through paths acting as rungs of a ladder chain structure. The average coupling J, which is antiferromagnetic (J < 0), according to the susceptibility data, is estimated with similar results with a mean field approximation (J = -1.4 cm(-1)), and with a uniform chain model (J = -1.7 cm(-1)). The EPR spectra of powdered samples and oriented single crystals are shown to be independent of J(1) and J(2), but are dependent on the weak coupling J(3), and the data allow a lower limit to be established: |J(3)| > 0.04 cm(-1). The spectra are also strongly sensitive to extremely weak coupling interactions with average magnitude J(4) between copper atoms in neighboring layers, separated by ?10 Å, using the stacked 2,2'-bipyridine molecules, which produce a 2D-to-3D quantum phase transition. This is observed in single-crystal samples when the energy levels are changed with the orientation of the magnetic field. From the characteristics of these transitions, we estimate a value of |J(4)| = 0.0034 ± 0.0004 cm(-1) between Cu(II) ions in neighboring layers. This work emphasizes the important possibilities of EPR to evaluate extremely small exchange couplings between metal ions in a solid material, even in the presence of other much larger couplings. PMID:22026723

Venegas-Yazigi, Diego; Brown, Kareen A; Vega, Andrés; Calvo, Rafael; Aliaga, Carolina; Santana, Ricardo C; Cardoso-Gil, Raul; Kniep, Rüdiger; Schnelle, Walter; Spodine, Evgenia

2011-10-25

248

Dimer-dimer stacking interactions are important for nucleic acid binding by the archaeal chromatin protein Alba  

PubMed Central

Archaea use a variety of small basic proteins to package their DNA. One of the most widespread and highly conserved is the Alba (Sso10b) protein. Alba interacts with both DNA and RNA in vitro, and we show in the present study that it binds more tightly to dsDNA (double-stranded DNA) than to either ssDNA (single-stranded DNA) or RNA. The Alba protein is dimeric in solution, and forms distinct ordered complexes with DNA that have been visualized by electron microscopy studies; these studies suggest that, on binding dsDNA, the protein forms extended helical protein fibres. An end-to-end association of consecutive Alba dimers is suggested by the presence of a dimer–dimer interface in crystal structures of Alba from several species, and by the strong conservation of the interface residues, centred on Arg59 and Phe60. In the present study we map perturbation of the polypeptide backbone of Alba upon binding to DNA and RNA by NMR, and demonstrate the central role of Phe60 in forming the dimer–dimer interface. Site-directed spin labelling and pulsed ESR are used to confirm that an end-to-end, dimer–dimer interaction forms in the presence of dsDNA.

Jelinska, Clare; Petrovic-Stojanovska, Biljana; Ingledew, W. John; White, Malcolm F.

2010-01-01

249

Nuclear Saturation with In-Medium Meson Exchange Interactions  

SciTech Connect

We show that the assumption of dropping meson masses together with conventional many-body effects, implemented in the relativistic Dirac-Brueckner formalism, explains nuclear saturation. We use a microscopic model for correlated 2{pi} exchange and include the standard many-body effects on the in-medium pion propagation, which initially increase the attractive nucleon-nucleon (NN ) potential with density. For the vector meson exchanges in both the {pi}{pi} and NN sector, we assume Brown-Rho scaling which{emdash}in concert with {open_quotes}chiral{close_quotes} {pi}{pi} contact interactions{emdash}reduces the attraction at higher densities. {copyright} {ital 1999} {ital The American Physical Society}

Rapp, R.; Durso, J.W.; Brown, G.E. [Department of Physics, SUNY at Stony Brook, Stony Brook, New York 11794-3800 (United States); Machleidt, R. [Department of Physics, University of Idaho, Moscow, Idaho 83844 (United States); Durso, J.W. [Physics Department, Mount Holyoke College, South Hadley, Massachusetts 01075 (United States)

1999-03-01

250

Role of stacking interactions in the binding sequence preferences of DNA bis-intercalators: insight from thermodynamic integration free energy simulations  

PubMed Central

The major structural determinant of the preference to bind to CpG binding sites on DNA exhibited by the natural quinoxaline bis-intercalators echinomycin and triostin A, or the quinoline echinomycin derivative, 2QN, is the 2-amino group of guanine (G). However, relocation of this group by means of introduction into the DNA molecule of the 2-aminoadenine (=2,6-diaminopurine, D) base in place of adenine (A) has been shown to lead to a drastic redistribution of binding sites, together with ultratight binding of 2QN to the sequence DTDT. Also, the demethylated triostin analogs, TANDEM and CysMeTANDEM, which bind with high affinity to TpA steps in natural DNA, bind much less tightly to CpI steps, despite the fact that both adenosine and the hypoxanthine-containing nucleoside, inosine (I), provide the same hydrogen bonding possibilities in the minor groove. To study both the increased binding affinity of 2QN for DTDT relative to GCGC sites and the remarkable loss of binding energy between CysMeTANDEM and ICIC compared with ATAT, a series of thermodynamic integration free energy simulations involving conversions between DNA base pairs have been performed. Our results demonstrate that the electrostatic component of the stacking interactions between the heteroaromatic rings of these compounds and the bases that make up the intercalation sites plays a very important role in the modulation of their binding affinities.

Marco, Esther; Negri, Ana; Luque, F. Javier; Gago, Federico

2005-01-01

251

Understanding Java Stack Inspection  

Microsoft Academic Search

Current implementations of Java make security decisions by searching the runtime call stack. These systems have attractive security properties, but they have been criticized as being dependent on specific artifacts of the Java imple- mentation. This paper models the stack inspection algorithm in terms of a well-understood logic for access control and demonstrates how stack inspection is a useful tool

Dan S. Wallach; Edward W. Felten

1998-01-01

252

A simple machine simulator for teaching stack frames  

Microsoft Academic Search

Stack frames are a fundamental concept in computer science often taught in an operating systems or an assembly language programming course. Computer security courses also rely on an understanding of stack frame concepts when teaching buffer overflow attacks. To assist students in learning the fundamentals of stack frames and related concepts, we have developed an interactive Simple Machine Simulator tool

Dino Schweitzer; Jeff Boleng

2010-01-01

253

Nature and magnitude of aromatic stacking of nucleic acid bases.  

PubMed

This review summarises recent advances in quantum chemical calculations of base-stacking forces in nucleic acids. We explain in detail the very complex relationship between the gas-phase base-stacking energies, as revealed by quantum chemical (QM) calculations, and the highly variable roles of these interactions in nucleic acids. This issue is rarely discussed in quantum chemical and physical chemistry literature. We further extensively discuss methods that are available for base-stacking studies, complexity of comparison of stacking calculations with gas phase experiments, balance of forces in stacked complexes of nucleic acid bases, and the relation between QM and force field descriptions. We also review all recent calculations on base-stacking systems, including details analysis of the B-DNA stacking. Specific attention is paid to the highest accuracy QM calculations, to the decomposition of the interactions, and development of dispersion-balanced DFT methods. Future prospects of computational studies of base stacking are discussed. PMID:18464974

Sponer, Jirí; Riley, Kevin E; Hobza, Pavel

2008-04-07

254

Stacking of Interferometric Data  

NASA Astrophysics Data System (ADS)

Radio and mm observations play an important role in determining the star formation properties of high redshift galaxies. However, most galaxies at high redshift are too faint to be detected individually at these wavelengths. A way to study this population of galaxies is to use stacking. By averaging the emission of a large number of galaxies detected in optical or near infrared surveys, we can achieve statistical detection. We investigate methods for stacking data from interferometric surveys. Interferometry poses unique challenges in stacking due to the nature of imaging of this data. We have compared directly stacking the uv data with stacking of the imaged data, the latter being the typically used approach. Using simulated data, we find that uv-stacking may provide around 50% less noise and that image based stacking systematically loses around 10% of the flux.

Lindroos, Lukas; Knudsen, Kirsten K.

2013-07-01

255

B^0 to \\pi^+ \\pi^- \\pi^0Time Dependent Dalitz Analysis at BaBar  

SciTech Connect

The author presents here results of a time-dependent analysis of the Dalitz structure of neutral B meson decays to {pi}{sup +}{pi}{sup -}{pi}{sup 0} from a dataset of 346 million B{bar B} pairs collected at the {Upsilon}(4S) center of mass energy by the BaBar detector at the SLAC PEP-II e{sup +}e{sup -} accelerator. No significant CP violation effects are observed and 68% confidence interval is derived on the weak angle {alpha} to be [75,152].

Cavoto, Gianluca

2007-04-06

256

Stacking with stochastic cooling  

NASA Astrophysics Data System (ADS)

Accumulation of large stacks of antiprotons or ions with the aid of stochastic cooling is more delicate than cooling a constant intensity beam. Basically the difficulty stems from the fact that the optimized gain and the cooling rate are inversely proportional to the number of particles `seen' by the cooling system. Therefore, to maintain fast stacking, the newly injected batch has to be strongly `protected' from the Schottky noise of the stack. Vice versa the stack has to be efficiently `shielded' against the high gain cooling system for the injected beam. In the antiproton accumulators with stacking ratios up to 105 the problem is solved by radial separation of the injection and the stack orbits in a region of large dispersion. An array of several tapered cooling systems with a matched gain profile provides a continuous particle flux towards the high-density stack core. Shielding of the different systems from each other is obtained both through the spatial separation and via the revolution frequencies (filters). In the `old AA', where the antiproton collection and stacking was done in one single ring, the injected beam was further shielded during cooling by means of a movable shutter. The complexity of these systems is very high. For more modest stacking ratios, one might use azimuthal rather than radial separation of stack and injected beam. Schematically half of the circumference would be used to accept and cool new beam and the remainder to house the stack. Fast gating is then required between the high gain cooling of the injected beam and the low gain stack cooling. RF-gymnastics are used to merge the pre-cooled batch with the stack, to re-create free space for the next injection, and to capture the new batch. This scheme is less demanding for the storage ring lattice, but at the expense of some reduction in stacking rate. The talk reviews the `radial' separation schemes and also gives some considerations to the `azimuthal' schemes.

Caspers, Fritz; Möhl, Dieter

2004-10-01

257

A histidine/tryptophan pi-stacking interaction stabilizes the heme-independent folding core of microsomal apocytochrome b5 relative to that of mitochondrial apocytochrome b5.  

PubMed

The outer mitochondrial membrane isoform of mammalian cytochrome b5 (OM b5) is considerably more stable than its microsomal counterpart (Mc b5), whereas the corresponding apoproteins (OM and Mc apo-b5) exhibit similar stability. OM and Mc apo-b5 are also similar in that their empty heme-binding pockets (core 1) are highly disordered but that the remainder of each apoprotein (core 2) displays substantial hololike structure. Core 1 residue 71 is leucine in all known mammalian OM b5's and serine in the corresponding Mc proteins. Replacing Leu-71 in rat OM (rOM) b5 with Ser has been shown to (1) decrease apoprotein thermodynamic stability by >2 kcal/mol and (2) extend conformational disorder beyond core 1 and into core 2, as evidenced in part by loss of a near-UV circular dichroism signal associated with the side chain of invariant residue Trp-22. Herein we report identification of a conserved Mc b5 core 2 packing motif that plays a key role in stabilizing apoprotein conformation in the vicinity of Trp-22, thereby compensating for the presence of Ser at position 71: a pi-stacking interaction between the side chains of Trp-22 and His-15 that is extended by hydrogen bonding between the side chains of His-15, Ser-20, and Glu-11. The corresponding conserved packing motif in OM b5's differs in having arginine at position 15 and glutamate at position 20. We also present evidence indicating that the conserved Mc b5 packing motif noted above contributes to the unusually extensive secondary structure exhibited by bovine Mc apo-b5 in the urea-denatured state. PMID:17105194

Wang, Lijun; Sun, Na; Terzyan, Simon; Zhang, Xuejun; Benson, David R

2006-11-21

258

Determination of partial-wave inelasticities for elastic pion-nucleon scattering with the aid of experimental data on {pi}N {yields} {pi}{pi}N processes in the beam-momentum range 300 < P{sub beam} < 500 MeV/c  

SciTech Connect

The partial-wave inelasticity parameters of the amplitude for elastic pion-nucleon scattering are determined with the aid of the phenomenological amplitude for inelastic {pi}N {yields} {pi}{pi}N processes in the energy range extending to the threshold for the production of two pions. The resulting inelasticity parameters are compared with their counterparts derived from modern partial-wave analyses. The largest inelastic-scattering cross section in the P11 wave is in excellent agreement with the analogous value from the analysis performed at the George Washington University in 2006. For other waves, however, the present results differ in the majority of cases from respective values given by partial-wave analyses (the distinctions are especially large for the isospin-3/2 amplitudes).

Kozhevnikov, V. A., E-mail: vadim.kozhevnikov@gmail.co [St. Petersburg State Polytechnical University (Russian Federation); Sherman, S. G., E-mail: sherman@pnpi.spb.r [Russian Academy of Sciences, Petersburg Nuclear Physics Institute (Russian Federation)

2008-11-15

259

Stack gas treatment  

DOEpatents

Hot stack gases transfer contained heat to a gravity flow of pebbles treated with a catalyst, cooled stacked gases and a sulfuric acid mist is withdrawn from the unit, and heat picked up by the pebbles is transferred to air for combustion or other process. The sulfuric acid (or sulfur, depending on the catalyst) is withdrawn in a recovery unit.

Reeves, Adam A. (P.O. Box 781, Rifle, CO 81650)

1977-04-12

260

Stack automata and compiling  

Microsoft Academic Search

Compilation consists of two parts, recognition and translation. A mathematical model is presented which embodies salient features of many modern compiling techniques. The model, called the stack automaton, has the desirable feature of being deterministic in nature. This deterministic device is generalized to a nondeterministic device (nondeterministic stack automaton) and particular instances of this more general device are noted. Sets

Seymour Ginsburg; Sheila A. Greibach; Michael A. Harrison

1967-01-01

261

StackGhost: Hardware Facilitated Stack Protection  

Microsoft Academic Search

Conventional security exploits have relied on over- writing the saved return pointer on the stack to hijack the path of execution. Under Sun Micro- system's Sparc processor architecture, we were able to implement a kernel modification to transparently and automatically guard applications' return point- ers.

Mike Frantzen; Mike Shuey

2001-01-01

262

Tunneling through nanographene stacks  

NASA Astrophysics Data System (ADS)

We present a scanning tunneling microscopy (STM) and spectroscopy (STS) study of a nanographene, hexa-peri-hexabenzocoronene (HBC), in different stacked geometries, covalently bound in cyclophanes or physisorbed in double layers consisting either of HBCs only or of a mixture of HBC and an alkylated disk-type electron acceptor, coronenediimide. Tunneling bias-dependent STM and STS at the solid-liquid interface reveal that the lateral offset between the stacked molecules strongly influences the electron transport through the stacks, which is attributed to different highest occupied and lowest unoccupied molecular orbital splittings in the stacks. The results imply that the control over the stacking in nanographene multilayers or columns can be used to control their electron transport properties.

Jäckel, F.; Watson, M. D.; Müllen, K.; Rabe, J. P.

2006-01-01

263

Solvent influence on base stacking.  

PubMed Central

In this paper we present a detailed analysis of the base-stacking phenomenon in different solvents, using nanosecond molecular dynamics simulations. The investigation focuses on deoxyribo- and ribodinucleoside monophosphates in aqueous and organic solutions. Organic solvents with a low dielectric constant, such as chloroform, and solvents with intermediate dielectric constants, such as dimethyl sulfoxide and methanol, were analyzed. This was also done for water, which is highly polar and has a high dielectric constant. Structural parameters such as the sugar puckering and the base-versus-base orientations, as well as the energetics of the solute-solvent interactions, were examined in the different solvents. The obtained data demonstrate that base stacking is favored in the high dielectric aqueous solution, followed by methanol and dimethyl sulfoxide with intermediate dielectric constants, and chloroform, with a low dielectric constant.

Norberg, J; Nilsson, L

1998-01-01

264

Measurement of pi(0)pi(0) production in the nuclear medium by pi(-) interactions at 0.408 GeV/c.  

PubMed

We report on an investigation of the (pi(-),pi(0)pi(0)) reaction by means of measurements of the pi(0)pi(0) invariant mass distributions from pi(-) interactions on H, D, C, Al, and Cu targets at p(pi(-)) = 0.408 GeV/c. The sharp, strong peak in the pi(+)pi(-) invariant mass near 2m(pi) reported by the CHAOS Collaboration is not seen in our pi(0)pi(0) data. However, we do observe a change in the shape of the pi(0)pi(0) invariant mass spectrum for the different targets, indicating that the pi(0)pi(0) interaction diminishes in the nuclear medium as represented by nuclei D, C, Al, and Cu, compared to hydrogen. PMID:11136041

Starostin, A; Staudenmaier, H M; Allgower, C E; Bekrenev, V; Berger, E; Briscoe, W J; Clajus, M; Comfort, J R; Craig, K; Grosnick, D; Isenhower, D; Knecht, N; Koetke, D; Koulbardis, A; Kozlenko, N; Kruglov, S; Kycia, T; Lolos, G; Lopatin, I; Manley, D M; Manweiler, B; Marusi?, A; McDonald, S; Nefkens, B M; Olmsted, J; Papandreou, Z; Peaslee, D; Peterson, R J; Phaisangittisakul, N; Prakhov, S; Pulver, M; Ramirez, A F; Sadler, M; Shafi, A; Slaus, I; Spinka, H; Stanislaus, S; Supek, I; Tippens, W B

2000-12-25

265

Stacking faults in magnesium  

SciTech Connect

The energetics of various low-energy intrinsic, extrinsic, and twinlike stacking fault configurations in hexagonal-close-packed magnesium are determined from first-principles calculations. To zeroth-order, the ordering of the energies can be understood in terms of the number of fcc-like planes in the sequence of close-packed planes. However, such a simple model fails to quantitatively reproduce the calculated energies of the faults. We propose a model based on a local bond orientation scheme which reproduces the calculated results and is able to accurately predict the energies of arbitrary stacking sequences. This model has only two independent parameters, the energy of the intrinsic I{sub 1} stacking fault and the energy difference between hcp and fcc Mg. Both energy and entropy considerations suggest that isolated I{sub 1} stacking faults should predominate. {copyright} {ital 1997} {ital The American Physical Society}

Chetty, N. [Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)]|[Department of Physics, University of Natal, Private Bag X01, Scottsville 3209 (South Africa); Weinert, M. [Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)

1997-11-01

266

Properties of K*(890) and K*(1400) Produced in Kp Interactions at 4.1 and 5.5 GeV\\/c  

Microsoft Academic Search

The results presented in this paper were obtained from an analysis of K-p interactions in the 30-in. hydrogen bubble chamber at the Argonne ZGS using incident K- beams of momenta 4.1 and 5.5 GeV\\/c. The K¯piN final states were studied extensively; the most prominent feature of these is production of the K*(890) and K*(1400) resonances. The K¯0pi-pi+n final state was

F. Schweingruber; M. Derrick; T. Fields; David Griffiths; L. G. Hyman; R. J. Jabbur; J. Loken; R. Ammar; R. E. Davis; W. Kropac; J. Mott

1968-01-01

267

Nature and Magnitude of Aromatic Stacking of Nucleic Acid Bases  

SciTech Connect

This review summarises recent advances in quantum chemical calculations of base-stacking forces in nucleic acids. We explain in detail the very complex relationship between the gas-phase basestacking energies, as revealed by quantum chemical (QM) calculations, and the highly variable roles of these interactions in nucleic acids. This issue is rarely discussed in quantum chemical and physical chemistry literature. We further extensively discuss methods that are available for basestacking studies, complexity of comparison of stacking calculations with gas phase experiments, balance of forces in stacked complexes of nucleic acid bases, and the relation between QM and force field descriptions. We also review all recent calculations on base-stacking systems, including details analysis of the B-DNA stacking. Specific attention is paid to the highest accuracy QM calculations, to the decomposition of the interactions, and development of dispersion-balanced DFT methods. Future prospects of computational studies of base stacking are discussed.

Sponer, Jiri; Riley, Kevin E.; Hobza, Pavel

2008-04-07

268

A ?-stacked phenylacetylene dimer.  

PubMed

The structure of the phenylacetylene-dimer has been elucidated using IR-UV double resonance spectroscopy in combination with high level ab initio calculations at the CCSD(T)/CBS level. The IR spectra in the acetylenic and the aromatic C-H stretching regions indicate that the two phenylacetylene moieties are in identical environments and very similar to the phenylacetylene monomer. Calculated stabilization energies and the free energies at the CCSD(T)/CBS level favor the formation of an anti-parallel ?-stacked structure. The DFT-SAPT energy decomposition analysis points out that the anti-parallel ?-stacked structure maximizes electrostatic as well as the dispersion components of energy. The observed IR spectra are consistent with the anti-parallel ?-stacked structure. PMID:21858279

Maity, Surajit; Patwari, G Naresh; Sedlak, Robert; Hobza, Pavel

2011-08-19

269

Stochastic stacking without filters  

SciTech Connect

The rate of accumulation of antiprotons is a critical factor in the design of p anti p colliders. A design of a system to accumulate higher anti p fluxes is presented here which is an alternative to the schemes used at the CERN AA and in the Fermilab Tevatron I design. Contrary to these stacking schemes, which use a system of notch filters to protect the dense core of antiprotons from the high power of the stack tail stochastic cooling, an eddy current shutter is used to protect the core in the region of the stack tail cooling kicker. Without filters one can have larger cooling bandwidths, better mixing for stochastic cooling, and easier operational criteria for the power amplifiers. In the case considered here a flux of 1.4 x 10/sup 8/ per sec is achieved with a 4 to 8 GHz bandwidth.

Johnson, R.P.; Marriner, J.

1982-12-01

270

Stack filter classifiers  

SciTech Connect

Just as linear models generalize the sample mean and weighted average, weighted order statistic models generalize the sample median and weighted median. This analogy can be continued informally to generalized additive modeels in the case of the mean, and Stack Filters in the case of the median. Both of these model classes have been extensively studied for signal and image processing but it is surprising to find that for pattern classification, their treatment has been significantly one sided. Generalized additive models are now a major tool in pattern classification and many different learning algorithms have been developed to fit model parameters to finite data. However Stack Filters remain largely confined to signal and image processing and learning algorithms for classification are yet to be seen. This paper is a step towards Stack Filter Classifiers and it shows that the approach is interesting from both a theoretical and a practical perspective.

Porter, Reid B [Los Alamos National Laboratory; Hush, Don [Los Alamos National Laboratory

2009-01-01

271

Effect of interaction on the exfoliation and dispersion of a stack of platelets in a dynamic polymer matrix and solvent particles by a coarse-grained Monte Carlo simulation  

NASA Astrophysics Data System (ADS)

We consider a stack (layer) of four sheets in host matrix of mobile polymer chains and solvent particles and study their exfoliation and dispersion on a discrete lattice. Sheets and chains are created by tethering particles (nodes) by the bond-fluctuation mechanism. Each component interacts and executes their stochastic motion via Metropolis algorithm. Entropic constraints (excluded volume and entanglement [1]) play a critical role in a relatively dense matrix. Therefore, the density of these constituents and their molecular weight are carefully selected to make this study feasible. Exfoliation of the sheets is examined by varying the interactions among different components, i.e., solvent particles, polymer chains, and platelets. The relaxation time for dispersion in the self-organizing dynamic mixture increases on increasing the molecular weight. Exfoliation ceases in a matrix with chains beyond a certain length. [1] R.B. Pandey and B.L. Farmer, J. Polym. Sci. Part B 46, 2696 (2008).

Farmer, Barry; Pandey, Ras

2009-03-01

272

The stacking-fault energy of graphite  

Microsoft Academic Search

Stacking-fault energies can be obtained from electron transmission micrographs by two methods. The first, due to Whelan (1958), involves measurement of the radius of curvature of a partial dislocation at an extended node. The interaction of the various partial dislocations at the measuring point is neglected and the value to be taken for the line tension of the partial dislocation

C. Baker; Y. T. Chou; A. Kelly

1961-01-01

273

Typical snead stacks, lower (first) stack level, view facing northwest. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Typical snead stacks, lower (first) stack level, view facing northwest. - Army War College, Fort Lesley J. McNair, entrance on P Street between Third & Fourth Streets Southwest, Washington, District of Columbia, DC

274

GENERAL PERSPECTIVE VIEW OF BOTH FURNACE STACKS LOOKING SOUTHWEST (STACK ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

GENERAL PERSPECTIVE VIEW OF BOTH FURNACE STACKS LOOKING SOUTHWEST (STACK NO. 1 TO LEFT, NO. 2 TO RIGHT) - Greenwood Furnace, East of McAlevy's Fort on State Route 305, McAlevys Fort, Huntingdon County, PA

275

STACK GAS REHEAT EVALUATION  

EPA Science Inventory

The report gives results of technical and economic evaluations of stack gas reheat (SGR) following wet flue gas desulfurization (FGD) for coal-fired power plants. The evaluations were based on information from literature and a survey of FGD users, vendors, and architect/engineer ...

276

Stacking up the Atmosphere  

NSDL National Science Digital Library

In this hands-on activity, participants learn the characteristics of the five layers of the atmosphere and make illustrations to represent them. They roll the drawings and place them in clear plastic cylinders, and then stack the cylinders to make a model column of the atmosphere.

Youngman, Betsy; Pennycook, Jean; Huffman, Louise; Dahlman, Luann; Nebraska, Andrill- U.

277

Stack Gas Reheat Evaluation.  

National Technical Information Service (NTIS)

The report gives results of technical and economic evaluations of stack gas reheat (SGR) following wet flue gas desulfurization (FGD) for coal-fired power plants. The evaluations were based on information from literature and a survey of FGD users, vendors...

W. R. Menzies C. A. Muela G. P. Behrens

1980-01-01

278

Issues in Stacked Generalization  

Microsoft Academic Search

Stacked generalization is a general method of using a high-level model to combine lower-level models to achieve greater predictive accuracy. In this paper we address two crucial issues which have been considered to be a `black art\\

Kai Ming Ting; Ian H. Witten

1999-01-01

279

Coherent emission of light using stacked gratings  

NASA Astrophysics Data System (ADS)

The possibility of temporally and spatially coherent thermal emission has been demonstrated utilizing stacked gratings. We demonstrate that the metallic grating with narrow air slit behaves like a homogeneous slab with large permittivity and small permeability and find that the interaction between the metallic grating and the Bragg grating gives rise to impendence matching at wavelengths located in the photonic band gap of the Bragg grating, which enables the stacked gratings to perform high emission with ultranarrow spectrum and antenna-like spatial response. This paves the way towards the design of a novel infrared source platform for applications such as thermal analysis, imaging, security, biosensing, and medical diagnoses.

Gong, Yongkang; Liu, Xianliang; Li, Kang; Huang, Jungang; Martinez, J. J.; Rees-Whippey, Daniel; Carver, Sara; Wang, Leiran; Zhang, Wenfu; Duan, Tao; Copner, Nigel

2013-05-01

280

Observation of pi+pi-pi+pi- photoproduction in ultraperipheral heavy-ion collisions at sqrt sNN = 200 GeV at the STAR detector  

Microsoft Academic Search

We present a measurement of {sup +}{sup +} photonuclear production in ultra-peripheral Au-Au collisions at s{sub NN} = 200 GeV from the STAR experiment. The {sup +}{sup +} final states are observed at low transverse momentum and are accompanied by mutual nuclear excitation of the beam particles. The strong enhancement of the production cross section at low transverse momentum is

B. I. Abelev; Z. Ahammed; A. V. Alakhverdyants; B. D. Anderson; D. Arkhipkin; G. S. Averichev; J. Balewski; L. S. Barnby; S. Baumgart; D. R. Beavis; R. Bellwied; F. Benedosso; M. J. Betancourt; R. R. Betts; A. K. Bhati; H. Bichsel; J. Bielcikova; B. Biritz; L. C. Bland; B. E. Bonner; J. Bouchet; E. Braidot; A. Bridgeman; E. Bruna; S. Bueltmann; I. Bunzarov; T. P. Burton; X. Z. Cai; H. Caines; M. Calderón de la Barca Sánchez; O. Catu; D. Cebra; R. Cendejas; M. C. Cervantes; Z. Chajecki; P. Chaloupka; S. Chattopadhyay; H. F. Chen; J. H. Chen; J. Cheng; M. Cherney; A. Chikanian; K. E. Choi; W. Christie; P. Chung; S. U. Chung; R. F. Clarke; M. J. M. Codrington; R. Corliss; J. G. Cramer; H. J. Crawford; D. Das; S. Dash; A. Davila Leyva; L. C. De Silva; R. R. Debbe; T. G. Dedovich; M. DePhillips; A. A. Derevschikov; R. Derradi de Souza; L. Didenko; P. Djawotho; S. M. Dogra; X. Dong; J. L. Drachenberg; J. E. Draper; J. C. Dunlop; M. R. Dutta Mazumdar; L. G. Efimov; E. Elhalhuli; M. Elnimr; J. Engelage; G. Eppley; B. Erazmus; M. Estienne; L. Eun; O. Evdokimov; P. Fachini; R. Fatemi; J. Fedorisin; R. G. Fersch; P. Filip; E. Finch; V. Fine; Y. Fisyak; C. A. Gagliardi; D. R. Gangadharan; M. S. Ganti; E. J. Garcia-Solis; A. Geromitsos; F. Geurts; V. Ghazikhanian; P. Ghosh; Y. N. Gorbunov; A. Gordon; O. Grebenyuk; D. Grosnick; B. Grube; S. M. Guertin; A. Gupta; N. Gupta; W. Guryn; B. Haag; T. J. Hallman; A. Hamed; L.-X. Han; J. W. Harris; J. P. Hays-Wehle; M. Heinz; S. Heppelmann; A. Hirsch; E. Hjort; A. M. Hoffman; G. W. Hoffmann; D. J. Hofman; R. S. Hollis; H. Z. Huang; T. J. Humanic; L. Huo; G. Igo; A. Iordanova; P. Jacobs; W. W. Jacobs; P. Jakl; C. Jena; F. Jin; C. L. Jones; P. G. Jones; J. Joseph; E. G. Judd; S. R. Klein; K. Kajimoto; K. Kang; J. Kapitan; K. Kauder; D. Keane; A. Kechechyan; D. Kettler; D. P. Kikola; J. Kiryluk; A. Kisiel; A. G. Knospe; A. Kocoloski; D. D. Koetke; T. Kollegger; J. Konzer; M. Kopytine; I. Koralt; W. Korsch; L. Kotchenda; V. Kouchpil; P. Kravtsov; K. Krueger; M. Krus; L. Kumar; P. Kurnadi; M. A. C. Lamont; J. M. Landgraf; S. LaPointe; J. Lauret; A. Lebedev; R. Lednicky; C.-H. Lee; J. H. Lee; W. Leight; M. J. LeVine; C. Li; L. Li; N. Li; W. Li; X. Li; Y. Li; Z. Li; G. Lin; S. J. Lindenbaum; M. A. Lisa; F. Liu; H. Liu; J. Liu; T. Ljubicic; W. J. Llope; R. S. Longacre; W. A. Love; Y. Lu; G. L. Ma; Y. G. Ma; D. P. Mahapatra; R. Majka; O. I. Mall; L. K. Mangotra; R. Manweiler; S. Margetis; C. Markert; H. Masui; H. S. Matis; Yu. A. Matulenko; D. McDonald; T. S. McShane; A. Meschanin; R. Milner; N. G. Minaev; S. Mioduszewski; A. Mischke; M. K. Mitrovski; B. Mohanty; M. M. Mondal; D. A. Morozov; M. G. Munhoz; B. K. Nandi; C. Nattrass; T. K. Nayak; J. M. Nelson; P. K. Netrakanti; M. J. Ng; L. V. Nogach; S. B. Nurushev; G. Odyniec; A. Ogawa; H. Okada; V. Okorokov; D. Olson; M. Pachr; B. S. Page; S. K. Pal; Y. Pandit; Y. Panebratsev; T. Pawlak; T. Peitzmann; V. Perevoztchikov; C. Perkins; W. Peryt; S. C. Phatak; P. Pile; M. Planinic; M. A. Ploskon; J. Pluta; D. Plyku; N. Poljak; A. M. Poskanzer; B. V. K. S. Potukuchi; C. B. Powell; D. Prindle; C. Pruneau; N. K. Pruthi; P. R. Pujahari; J. Putschke; R. Raniwala; S. Raniwala; R. L. Ray; R. Redwine; R. Reed; J. M. Rehberg; H. G. Ritter; J. B. Roberts; O. V. Rogachevskiy; J. L. Romero; A. Rose; C. Roy; L. Ruan; M. J. Russcher; R. Sahoo; S. Sakai; I. Sakrejda; T. Sakuma; S. Salur; J. Sandweiss; E. Sangaline; J. Schambach; R. P. Scharenberg; N. Schmitz; T. R. Schuster; J. Seele; J. Seger; I. Selyuzhenkov; P. Seyboth; E. Shahaliev; M. Shao; M. Sharma; S. S. Shi; E. P. Sichtermann; F. Simon; R. N. Singaraju; M. J. Skoby; N. Smirnov; P. Sorensen; J. Sowinski; H. M. Spinka; B. Srivastava; T. D. S. Stanislaus; D. Staszak; J. R. Stevens; R. Stock; M. Strikhanov; B. Stringfellow; A. A. P. Suaide; M. C. Suarez; N. L. Subba; M. Sumbera; X. M. Sun; Y. Sun; Z. Sun; B. Surrow; T. J. M. Symons; A. Szanto de Toledo; J. Takahashi; A. H. Tang; Z. Tang; L. H. Tarini; T. Tarnowsky; D. Thein; J. H. Thomas; J. Tian; A. R. Timmins; S. Timoshenko; D. Tlusty; M. Tokarev; T. A. Trainor; V. N. Tram; S. Trentalange; R. E. Tribble; O. D. Tsai; J. Ulery; T. Ullrich; D. G. Underwood; G. Van Buren; G. van Nieuwenhuizen; J. A. Vanfossen; R. Varma; G. M. S. Vasconcelos; A. N. Vasiliev; F. Videbaek; Y. P. Viyogi; S. Vokal; S. A. Voloshin; M. Wada; M. Walker; F. Wang; G. Wang; H. Wang; J. S. Wang; Q. Wang; X. Wang; Y. Wang; G. Webb; J. C. Webb; G. D. Westfall; C. Whitten; H. Wieman; E. Wingfield; S. W. Wissink; R. Witt; Y. Wu; W. Xie; N. Xu; Q. H. Xu; W. Xu; Y. Xu; Z. Xu; L. Xue; Y. Yang; P. Yepes; K. Yip; I.-K. Yoo; Q. Yue; M. Zawisza; H. Zbroszczyk; W. Zhan; S. Zhang; W. M. Zhang; X. P. Zhang; Y. Zhang; Z. P. Zhang; J. Zhao; C. Zhong; J. Zhou; W. Zhou; X. Zhu; Y. H. Zhu; R. Zoulkarneev; Y. Zoulkarneeva

2010-01-01

281

Observation of pi+ pi- pi+pi- photoproduction in ultraperipheral heavy-ion collisons at sqrt sNN = 200 GeV at the STAR Detector  

SciTech Connect

We present a measurement of {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} photonuclear production in ultraperipheral Au-Au collisions at {radical}s{sub NN} = 200 GeV from the STAR experiment. The {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} final states are observed at low transverse momentum and are accompanied by mutual nuclear excitation of the beam particles. The strong enhancement of the production cross section at low transverse momentum is consistent with coherent photoproduction. The {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} invariant mass spectrum of the coherent events exhibits a broad peak around 1540 {+-} 40 MeV/c{sup 2} with a width of 570 {+-} 60 MeV/c{sup 2}, in agreement with the photoproduction data for the {rho}{sup 0}(1700). We do not observe a corresponding peak in the {pi}{sup +}{pi}{sup -} final state and measure an upper limit for the ratio of the branching fractions of the {rho}{sup 0}(1700) to {pi}{sup +}{pi}{sup -} and {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} of 2.5% at 90% confidence level. The ratio of {rho}{sup 0}(1700) and {rho}{sup 0}(770) coherent production cross sections is measured to be 13.4 {+-} 0.8{sub stat.}{+-}4.4{sub syst.}%.

Abelev, B.I.; Dunlop, J.; et al. STAR Collaboration

2010-04-02

282

ETR WASTE GAS STACK. ABOVE GROUND DUCTWORK AND ETR STACK, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

ETR WASTE GAS STACK. ABOVE GROUND DUCTWORK AND ETR STACK, CLOSER VIEW. PERSONNEL LADDER AND CIRCULAR WORK PLATFORM MIDWAY UP STACK. CAMERA FACES NORTH. INL NEGATIVE NO. HD42-7-2. Mike Crane, Photographer, 3/2004 - Idaho National Engineering Laboratory, Test Reactor Area, Materials & Engineering Test Reactors, Scoville, Butte County, ID

283

GENERAL PERSPECTIVE VIEW OF BOTH FURNACE STACKS LOOKING NORTHEAST (STACK ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

GENERAL PERSPECTIVE VIEW OF BOTH FURNACE STACKS LOOKING NORTHEAST (STACK NO. 2 TO LEFT, REMAINS OF NO. 1 AT CENTER RIGHT) - Greenwood Furnace, Stack No. 2, East of McAlevy's Fort on State Route 305, McAlevys Fort, Huntingdon County, PA

284

Stack inspection: theory and variants  

Microsoft Academic Search

Stack inspection is a security mechanism implemented in runtimes such as the JVM and the CLR to accommodate components with diverse levels of trust. Although stack inspection enables the fine-grained expression of access control policies, it has rather a complex and subtle semantics. We present a formal semantics and an equational theory to explain how stack inspection affects program behaviour

Cédric Fournet; Andrew D. Gordon

2002-01-01

285

Reactions of the phthalimide N-oxyl radical (PINO) with activated phenols: the contribution of ?-stacking interactions to hydrogen atom transfer rates.  

PubMed

The kinetics of reactions of the phthalimide N-oxyl radical (PINO) with a series of activated phenols (2,2,5,7,8-pentamethylchroman-6-ol (PMC), 2,6-dimethyl- and 2,6-di-tert-butyl-4-substituted phenols) were investigated by laser flash photolysis in CH(3)CN and PhCl in order to establish if the reactions with PINO can provide a useful tool for evaluating the radical scavenging ability of phenolic antioxidants. On the basis of the small values of deuterium kinetic isotope effects, the relatively high and negative ? values in the Hammett correlations and the results of theoretical calculations, we suggest that these reactions proceed by a hydrogen atom transfer (HAT) mechanism having a significant degree of charge transfer resulting from a ?-stacked conformation between PINO and the aromatic ring of the phenols. Kinetic solvent effects were analyzed in detail for the hydrogen transfer from 2,4,6-trimethylphenol to PINO and the data obtained are in accordance with the Snelgrove-Ingold equation for HAT. Experimental rate constants for the reactions of PINO with activated phenols are in accordance with those predicted by applying the Marcus cross relation. PMID:23289435

D'Alfonso, Claudio; Bietti, Massimo; DiLabio, Gino A; Lanzalunga, Osvaldo; Salamone, Michela

2013-01-18

286

The modulation by xanthines of the DNA-damaging effect of polycyclic aromatic agents. Part II. The stacking complexes of caffeine with doxorubicin and mitoxantrone.  

PubMed

Recently accumulated statistical data indicate the protective effect of caffeine consumption against several types of cancer diseases. There are also reports about protective effect of caffeine and other xanthines against tumors induced by polycyclic aromatic hydrocarbons. One of the explanations of this phenomenon is based on biological activation of such carcinogens by cytochromes that are also known for metabolism of caffeine. In the accompanying paper [Kapuscinski et al., this issue] we provide evidence (flow cytometry and the cell cycle analysis) that the cytostatic effects of caffeine (CAF) on two DNA alkylating agents, which do not require the biological activation, depend on their ability to form stacking (pi-pi) complexes. In this study, we use physicochemical techniques (computer aided light absorption and microcalorimetry), and molecular modeling to examine previously published qualitative data. This is published both by our and other group's data, indicates that CAF is able to modify the cytotoxic and/or cytostatic action of the two well known antitumor drugs doxorubicin (DOX) and mitoxantrone (MIT). To obtain the quantitative results from the experimental data we used the statistical-thermodynamical model of mixed aggregation, to find the association constants K(AC) of the CAF-drug interaction (128+/-10 and 356+/-21M(-1) for DOX-CAF and MIT-CAF complex formation, respectively). In addition, the favorable enthalpy change of CAF-MIT (DeltaH=-11.3kcal/mol) was measured by microcalorimetry titration. The molecular modeling (semi-empirical and force field method) allowed us to obtain the geometry of these complexes, which indicated the favorable energy (DeltaE) of complex formation of the protonated drug's molecules in aqueous environment (-7.4 and -8.7kcal/mol for DOX-CAF.5H(2)O and MIT-CAF.8H(2)O complex, respectively). The molecular modeling calculation indicates the existence of CAF-drug complexes in which the MIT molecules are intercalated between two CAF molecules (DeltaE=-29.9kcal/mol). These results indicate that the attenuating effect of caffeine on cytotoxic or mutagenic effects of some polycyclic aromatic mutagens cannot be the result of metabolic activation in the cells, but simply is the physicochemical process of the sequestering of aromatic molecules (e.g. carcinogens or mutagens) by formation of the stacking complexes. The caffeine may then act as the "interceptor" of potential carcinogens (especially in the upper part of digesting track) where its concentration can reach the mM level). There is, however, no indication, both, in the literature or from our experiments, that the xanthines can reverse the damage to nucleic acids at the point when the damage to DNA has already occurred. PMID:11992631

Piosik, Jacek; Zdunek, Malgorzata; Kapuscinski, Jan

2002-02-15

287

An atomic force microcopy study of the mechanical and electricalproperties of monolayer films of molecules with aromatic end groups  

SciTech Connect

The effect of intermolecular {pi}-{pi} stacking on the electrical and mechanical properties of monolayer films molecules containing aromatic groups was studied using atomic force microscopy. Two types of aromatic molecules, (4-mercaptophenyl) anthrylacetylene (MPAA) and (4-mercaptophenyl)-phenylacetylene (MPPA) were used as model systems with different {pi}-{pi} stacking strength. Monolayer films of these molecules on Au(111) surfaces exhibited conductivities differing by more than one order of magnitude, MPAA being the most conductive and MPPA the least conductive. The response to compressive loads by the AFM tip was also found to be very different for both molecules. In MPAA films distinct molecular conductivity changes are observed upon mechanical perturbation. This effect however was not observed on the MPPA film, where intermolecular {pi}-{pi} interactions are likely weaker.

Fang, Liang; Park, J.Y.; Ma, H.; Jen, A.K.-Y.; Salmeron, M.

2007-09-06

288

Atomic force microcopy study of the mechanical and electrical properties of monolayer films of molecules with aromatic end groups.  

PubMed

The effect of intermolecular pi-pi stacking on the electrical and mechanical properties of monolayer film molecules containing aromatic groups was studied using atomic force microscopy. Two types of aromatic molecules, (4-mercaptophenyl) anthrylacetylene (MPAA) and (4-mercaptophenyl)-phenylacetylene (MPPA), were used as model systems with different pi-pi stacking strength. Monolayer films of these molecules on Au(111) surfaces exhibited conductivities differing by more than 1 order of magnitude, with MPAA being the most conductive and MPPA being the least conductive. The response to compressive loads by the AFM tip was also found to be very different for both molecules. In MPAA films, distinct molecular conductivity changes are observed upon mechanical perturbation. This effect, however, was not observed on the MPPA film, where intermolecular pi-pi interactions are likely weaker. PMID:17924672

Fang, Liang; Park, J Y; Ma, H; Jen, A K-Y; Salmeron, M

2007-10-09

289

Effect of nitrogen on stacking fault energy of f.c.c. iron-based alloys  

Microsoft Academic Search

A method is proposed to estimate the stacking fault energies of face-centered-cubic (f.c.c.) iron-based alloys. The segregation of alloying elements to stacking faults and the interaction of substitutional and interstitial alloying elements in solid solution and their effect on stacking fault energy have been taken into account. It is shown that at low nitrogen concentrations (e.g. 0.05wt%), the stacking fault

I. A. Yakubtsov; A. Ariapour; D. D. Perovic

1999-01-01

290

Conformation-Specific and Mass-Resolved Infrared-Population Transfer Spectroscopy of the Model ?^{2}-PEPTIDE Ac-?^{2}-hPhe-NHMe: Evidence for the Presence of Intramolecular Amide-Amide Stacking Interactions.  

NASA Astrophysics Data System (ADS)

Recently, double resonance spectroscopy has been utilized to elucidate the conformational preferences of natural peptide mimetics. These studies demonstrated the power of double resonance methods and highlighted the ability of even short peptide mimetics to form a variety of intramolecular hydrogen bonded architectures. Currently, we have undertaken a detailed study of a model ?^{2}-peptide using double resonance spectroscopy. Conformation-specific IR spectra in the amide NH and amide I stretch spectral regions of Ac-?^{2}-hPhe-NHMe provide evidence for three unique conformational isomers in a jet-cooled environment. The results of DFT and MP2 calculations will be presented as a basis for assignment of the experimentally resolved conformers. Two conformers form nine atom, intramolecular hydrogen bonded rings, which differ by the position of the aromatic ring relative to the peptide backbone. The third conformer does not contain intramolecular hydrogen bonding, but forms an intramolecular, amide-amide stacking structural motif, which when analyzed with the quantum theory of Atoms In Molecules is shown to contain an interaction between the carbon atom of the acetylated N-terminal amide and the nitrogen atom of the methylated C-terminal amide. In an effort to quantitatively assess the competition between hydrogen bonded and amide-amide stacked conformers, mass-resolved, infrared-population transfer spectroscopy was developed, where the IR and molecular beams are counter-propagated allowing for a re-cooling step prior to detection via resonant two-photon ionization spectroscopy. Using this method the fractional abundances of each conformer were experimentally determined. W. Chin, F. Piuzzi, I. Dimicoli, and M. Mons, PCCP, 2006, 8, 1033. E. E. Baquero, W. H. James III, S. H. Choi, S. H. Gellman, and T. S. Zwier, J. Am. Chem. Soc., 2008, 130, 4784.

James, William H. James, III; Buchanan, Evan G.; Müller, Christian W.; Zwier, Timothy S.; Nix, Michael G. D.; Guo, Li; Gellman, Samuel H.

2009-06-01

291

Measurement of the Branching Ratio for D Meson Going to Positive KAON(892)POSITIVE Muon Neutrino and Search for Coherent Charm Production in 800 Gev/c Proton-Silicon Interactions  

NASA Astrophysics Data System (ADS)

This thesis reports the results from two independent analyses:. In the first analysis, the branching ratio for the decay mode D^+to|{K }^{*0}mu^+nu has been measured with two methods. The first uses D ^0to K^-mu^+nu for normalization, and yields the result B(D^+ to|{K}^{*0}mu ^+nu) = (3.25 +/- 0.71 +/- 0.75)%. From this method we also obtain the direct measurement Gamma(D ^+to|{K}^{*0 }mu^+nu)/Gamma(D^0 to K^-mu^+nu) = 0.43 +/- 0.09 +/- 0.09. The second method uses the mode D^+ to K^-pi^+pi^+ for normalization and yields B(D^+to |{K}^{*0}mu^+ nu) = (4.18 +/- 0.66 +/- 0.96)%. Combining the results of the two methods yields B(D^+to |{K}^{*0}mu^+ nu) = (3.57 +/- 0.96)%. In the second analysis, coherent charm production in 800 GeV/c proton-Silicon interactions was searched for in the decay modes D^+to K^ -pi^+pi^+, D^0 to K^-pi^+, D ^0to K^-pi^+pi^+ pi^- and Lambda_sp {c}{+}to pK^-pi^+ . The data were recorded in the Fermilab E653 spectrometer. An active silicon wafer target assembly and a multiplicity jump trigger were used. No coherent charm signals were observed, and 90% confidence level upper limit for coherent charm pair production was determined to be 26 mu b per silicon nucleus. The results are interpreted as an upper limit of 0.2% on the amount of intrinsic charm in the proton.

Zhang, Chong

292

Stacking with dual bootstrap resampling  

NASA Astrophysics Data System (ADS)

A new kind of stacking scheme, based on the hypothesis testing of signal significance and coherence, is proposed. The significance of stacked data is evaluated by running two kinds of bootstrap resampling, one for standard bootstrap and the other for preparing noise stacks by scrambling relative time-shifts between traces. This dual bootstrap procedure allows us to formulate a two-sample problem for signal significance, which is shown to be more reliable than standard bootstrap estimates. The statistics of noise obtained in dual bootstrap resampling is also used when assessing the coherence of data with the empirical distribution function, in which the effect of noise is deconvolved by rescaling. Unlike conventional non-linear stacks such as Nth-root stack and phase-weighted stack, the new stack can recover signals even when the signal-to-noise ratio (S/N) is low, and compared to simple linear stack, the number of traces required for unambiguous signal detection is reduced by up to two orders of magnitude. The new scheme, called dual bootstrap stack, could facilitate a range of geophysical data processing when trying to detect subtle signals by stacking low S/N data.

Korenaga, Jun

2013-10-01

293

Pyridinium CH...anion and pi-stacking interactions in modular tripodal anion binding hosts: ATP binding and solid-state chiral induction.  

PubMed

The preparation of two new tripodal "pinwheel" type anion hosts based on a triethylbenzene core and bipyridinium or ethylnicotinium arms is reported. The new materials bind anions via CH...anion interactions. Complexes with Br(-) and PF(6)(-) have been characterised by X-ray crystallography as both solvates in a pure form. In the bipyridinium host CH...F interactions to PF(6)(-) induce a chiral C(3) symmetric conformation that is disrupted in the hydrate. The compound is also selective for ATP(2-) in aqueous acetonitrile. PMID:16493460

Belcher, Warwick J; Fabre, Muriel; Farhan, Tamer; Steed, Jonathan W

2006-01-25

294

Stacked waveguide image slicer.  

NASA Astrophysics Data System (ADS)

A novel image slicer has been developed which is composed of stacked thin-glass plates. Each glass plate works as optical waveguides and the glass plates are prepared so that the beam-exit portions line up linearly in a step-like form. The glass plates are optically polished and are glued with STYCAST that works as a clad for the waveguide. By choosing the pair of refractive indices of the core and clad appropriately, this slicer can be used in an optical system with a F/ratio as fast as 3.

Suto, H.; Takami, H.

295

Hydrogen bonding, stacking and cation binding of DNA bases  

Microsoft Academic Search

Ab initio quantum chemical calculations with inclusion of electron correlation effects significantly contributed to our understanding of molecular interactions of DNA bases. Some of the most important findings are introduced in the present overview: nonplanarity of nucleobases, out-of-plane hydrogen bonds and amino acceptor interactions, structures and energies of hydrogen bonded base pairs, nature of base stacking, and interactions between metal

Ji??? Šponer; Jerzy Leszczynski; Pavel Hobza

2001-01-01

296

Measurement of the Ratios of Branching Fractions B(Bs -> Ds pi pi pi) / B(Bd -> Dd pi pi pi) and B(Bs -> Ds pi) / B(Bd -> Dd pi)  

SciTech Connect

Using 355 pb{sup -1} of data collected by the CDF II detector in p{bar p} collisions at {radical}s = 1.96 TeV at the Fermilab Tevatron, they study the fully reconstructed hadronic decays B{sub (s)}{sup 0} {yields} D{sub (s)}{sup -}{pi}{sup +} and B{sub (s)}{sup 0} {yields} D{sub (s)}{sup -} {pi}{sup +}{pi}{sup +}{pi}{sup -}. They present the first measurement of the ratio of branching fractions {Beta}(B{sub s}{sup 0} {yields} D{sub s}{sup -}{pi}{sup +}{pi}{sup +}{pi}{sup -})/{Beta}(B{sup 0} {yields} D{sup -} {pi}{sup +}{pi}{sup +}{pi}{sup -}) = 1.05 {+-} 0.10(stat.) {+-} 0.22(syst.). They also update their measurement of {Beta}(B{sub s}{sup 0} {yields} D{sub s}{sup -} {pi}{sup +})/{Beta}(B{sup 0} {yields} D{sup -} {pi}{sup +}) to 1.13 {+-} 0.08(stat.) {+-} 0.23(syst.) improving the statistical uncertainty by more than a factor of two. They find {Beta}(B{sub s}{sup 0} {yields} D{sub s}{sup -} {pi}{sup +}) = [3.8 {+-} 0.3(stat.) {+-} 1.3(syst.)] x 10{sup -3} and {Beta}(B{sub s}{sup 0} {yields} D{sub s}{sup -} {pi}{sup +}{pi}{sup +}{pi}{sup -}) = [8.4 {+-} 0.8(stat.) {+-} 3.2(syst.)] x 10{sup -3}.

Abulencia, A.; /Illinois U., Urbana; Adelman, J.; /Chicago U.; Affolder, T.; /UC, Santa Barbara; Akimoto, T.; /Tsukuba U.; Albrow, M.G.; /Fermilab; Ambrose, D.; /Fermilab; Amerio, S.; /Padua U.; Amidei, D.; /Michigan U.; Anastassov, A.; /Rutgers U., Piscataway; Anikeev, K.; /Fermilab; Annovi, A.; /Frascati /Taiwan, Inst. Phys.

2006-10-01

297

Measurements of the branching fractions for B{sub (s)}{yields}D{sub (s)}{pi}{pi}{pi} and {Lambda}{sub b}{sup 0}{yields}{Lambda}{sub c}{sup +}{pi}{pi}{pi}  

SciTech Connect

Branching fractions of the decays H{sub b}{yields}H{sub c}{pi}{sup -}{pi}{sup +}{pi}{sup -} relative to H{sub b}{yields}H{sub c}{pi}{sup -} are presented, where H{sub b} (H{sub c}) represents B{sup 0} (D{sup +}), B{sup -} (D{sup 0}), B{sub s}{sup 0} (D{sub s}{sup +}), and {Lambda}{sub b}{sup 0} ({Lambda}{sub c}{sup +}). The measurements are performed with the LHCb detector using 35 pb{sup -1} of data collected at {radical}(s)=7 TeV. The ratios of branching fractions are measured to be [B(B{sup 0}{yields}D{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -})]/[B(B{sup 0}{yields}D{sup +}{pi}{sup -})]=2.38{+-}0.11{+-}0.21, [B(B{sup -}{yields}D{sup 0}{pi}{sup -}{pi}{sup +}{pi}{sup -})]/[B(B{sup -}{yields}D{sup 0}{pi}{sup -})]= 1.27{+-}0.06{+-}0.11, [B(B{sub s}{sup 0}{yields}D{sub s}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -})]/[B(B{sub s}{sup 0}{yields}D{sub s}{sup +}{pi}{sup -})]=2.01{+-}0.37{+-}0.20, [B({Lambda}{sub b}{sup 0}{yields}{Lambda}{sub c}{sup +}{pi}{sup -} {pi}{sup +}{pi}{sup -})]/[B({Lambda}{sub b}{sup 0}{yields}{Lambda}{sub c}{sup +}{pi}{sup -})]=1.43{+-}0.16{+-}0.13 We also report measurements of partial decay rates of these decays to excited charm hadrons. These results are of comparable or higher precision than existing measurements.

Aaij, R.; Bauer, Th.; Beuzekom, M. van; Carvalho Akiba, K.; Coco, V.; van Eijk, D.; Farinelli, C.; Heijne, V.; Hulsbergen, W.; Jans, E.; Jansen, F.; Koppenburg, P.; Kozlinskiy, A.; van Leerdam, J.; Merk, M.; Mous, I.; Oggero, S.; Pellegrino, A.; du Pree, T.; Storaci, B. [Nikhef National Institute for Subatomic Physics, Amsterdam (Netherlands)

2011-11-01

298

Dalitz Plot Analysis of B- -> D+ pi- pi-  

SciTech Connect

The author reports on a Dalitz plot analysis of B{sup -} {yields} D{sup +}{pi}{sup -}{pi}{sup -} decays, based on a sample of about 383 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They find the total branching fraction of the three-body decay: {Beta}(B{sup -} {yields} D{sup +} {pi}{sup -}{pi}{sup -}) = (1.08 {+-} 0.01 {+-} 0.05) x 10{sup -3}. the masses and widths of D*{sub 2}{sup 0} and D*{sub 0}{sup 0}, the 2{sup +} and 0{sup +} c{bar u} P-wave states decaying to D{sup +}{pi}{sup -}, are measured: m{sub D*{sub 2}{sup 0}} = (2460.4 {+-} 1.2 {+-} 1.2 {+-} 1.9) MeV/c{sup 2}, {Lambda}{sub D*{sub 2}{sup 0}} = (41.8 {+-} 2.5 {+-} 2.1 {+-} 2.0) MeV, m{sub D*{sub 0}{sup 0}} = (2297 {+-} 8 {+-} 5 {+-} 19) MeV/c{sup 2} and {Lambda}{sub D*{sub 0}{sup 0}} = (273 {+-} 12 {+-} 17 {+-} 45) MeV. The stated errors reflect the statistical and systematic uncertainties, and the uncertainty related to the assumed composition of signal events and the theoretical model.

Aubert, : B.

2009-01-29

299

Photoproduction of pi+pi- meson pairs on the proton  

Microsoft Academic Search

The exclusive reaction gammap-->ppi+pi- was studied in the photon energy range 3.0-3.8 GeV and the momentum transfer range 0.4<-t<1.0GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. In this kinematic range, the integrated luminosity was about 20pb-1. The reaction was isolated by detecting the pi+ and proton in CLAS, and reconstructing the pi- via

Marco Battaglieri; Raffaella De Vita; Adam Szczepaniak; K. P. Adhikari; M. J. Amaryan; M. Anghinolfi; H. Baghdasaryan; I. Bedlinskiy; M. Bellis; L. Bibrzycki; A. S. Biselli; C. Bookwalter; D. Branford; W. J. Briscoe; V. D. Burkert; S. L. Careccia; D. S. Carman; E. Clinton; P. L. Cole; P. Collins; V. Crede; D. Dale; A. D'Angelo; A. Daniel; N. Dashyan; E. de Sanctis; A. Deur; S. Dhamija; C. Djalali; G. E. Dodge; D. Doughty; V. Drozdov; H. Egiyan; P. Eugenio; G. Fedotov; S. Fegan; A. Fradi; M. Y. Gabrielyan; L. Gan; M. Garçon; A. Gasparian; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; O. Glamazdin; J. Goett; J. T. Goetz; W. Gohn; E. Golovatch; R. W. Gothe; K. A. Griffioen; M. Guidal; L. Guo; K. Hafidi; H. Hakobyan; C. Hanretty; N. Hassall; K. Hicks; M. Holtrop; C. E. Hyde; Y. Ilieva; D. G. Ireland; E. L. Isupov; J. R. Johnstone; K. Joo; D. Keller; M. Khandaker; P. Khetarpal; W. Kim; A. Kubarovsky; F. J. Klein; M. Kossov; V. Kubarovsky; S. V. Kuleshov; V. Kuznetsov; J. M. Laget; L. Lesniak; K. Livingston; H. Y. Lu; M. Mayer; M. E. McCracken; B. McKinnon; C. A. Meyer; K. Mikhailov; T. Mineeva; M. Mirazita; V. Mochalov; V. Mokeev; K. Moriya; E. Munevar; P. Nadel-Turonski; I. Nakagawa; C. S. Nepali; S. Niccolai; I. Niculescu; M. R. Niroula; M. Osipenko; A. I. Ostrovidov; E. Pasyuk; S. Anefalos Pereira; S. Pisano; N. Pivnyuk; O. Pogorelko; S. Pozdniakov; J. W. Price; Y. Prok; D. Protopopescu; B. A. Raue; G. Ricco; M. Ripani; B. G. Ritchie; G. Rosner; P. Rossi; F. Sabatié; M. S. Saini; C. Salgado; D. Schott; R. A. Schumacher; H. Seraydaryan; Y. G. Sharabian; D. I. Sober; D. Sokhan; A. Stavinsky; S. Stepanyan; P. Stoler; I. I. Strakovsky; S. Strauch; M. Taiuti; D. J. Tedeschi; A. Teymurazyan; S. Tkachenko; M. Ungaro; M. F. Vineyard; A. V. Vlassov; D. P. Watts; L. B. Weinstein; D. P. Weygand; M. Williams; E. Wolin; M. H. Wood; L. Zana; J. Zhang; B. Zhao; Z. W. Zhao

2009-01-01

300

Study of the D0 ---> K+ K- pi+ pi-  

SciTech Connect

Using data from the FOCUS (E831) experiment at Fermilab, the authors present a new measurement for the Cabibbo-suppressed decay mode D{sup 0} {yields} K{sup +}K{sup -}{pi}{sup +}{pi}{sup -}. They measure: {Lambda}(D{sup 0} {yields} K{sup +}K{sup -}{pi}{sup +}{pi}{sup -})/{Lambda}(D{sup 0} {yields} K{sup -}{pi}{sup -}{pi}{sup +}{pi}{sup +}) = 0.0295 {+-} 0.0011 {+-} 0.0008. An amplitude analysis has been performed in order to determine the resonant substructure of this decay mode. The dominant components are the decays D{sup 0} {yields} K{sub 1}(1270){sup +} K{sup -}, D{sup 0} {yields} K{sub 1}(1400){sup +}K{sup -} and D{sup 0} {yields} {rho}(770){sup 0}{phi}(1020).

Link, J.M.; Yager, P.M.; /UC, Davis; Anjos, J.C.; Bediaga, I.; Gobel, C.; Machado, A.A.; Magnin, J.; Massafferri, A.; de Miranda, J.M.; Pepe, I.M.; Polycarpo, E.; dos Reis, A.C.; /Rio de Janeiro, CBPF; Carrillo, S.; Casimiro, E.; Cuautle, E.; Sanchez-Hernandez, A.; Uribe, C.; Vazquez, F.; /CINVESTAV, IPN; Agostino, L.; Cinquini, L.; Cumalat, J.P. /Colorado U. /Fermilab /Frascati /Guanajuato U. /Illinois U., Urbana /Indiana U. /Korea U. /Kyungpook Natl. U. /INFN, Milan /Milan U. /North Carolina U. /Pavia U. /INFN, Pavia /Puerto Rico U., Mayaguez /South Carolina U. /Tennessee U. /Vanderbilt U. /Wisconsin U., Madison

2004-11-01

301

Rho Meson Decay into pi+pi- on Asymmetrical Lattices  

NASA Astrophysics Data System (ADS)

The computation of the lowest-lying hadron masses was the earliest success of lattice QCD. Current spectroscopy is faced with the task of computing excited-states. This is particularly challenging when excited-states appear as scattering resonances. In this case, the resonance parameters have to be determined by studying the energies of the scattering states. Currently it is only computationally feasible to compute resonances of the simplest systems. In our work, we carry out a calculation of the ?(770) resonance seen in the isospin l = 1 two-pion system in the l = 1 channel. To determine the resonance parameters, we compute the scattering phase shifts from the two-pion spectrum using Luscher's formula. Unlike other studies which employ the moving frame formalism, we use lattices with one spatial direction elongated. To vary the momentum of the two-pion state, we adjust the length of the elongated direction. With this approach, the two-pion momentum can be tuned more finely, which allows one to map out the resonance more accurately. In this work, we employed nHYP-smeared clover fermions with two mass-degenerate quarks. The lattice computations were carried out on large elongated lattices with spatial volumes ? 33 fm3. We carried out an exploratory quenched study and found the two-pion spectrum to be compatible with the results obtained using dynamical fermions. Our results showed a disagreement with the physical decay at the level of 20% which is typical for quenched simulations. After completing the quenched study, we recomputed the resonance parameters on fully dynamical gauge configurations with a pion mass of 304(2) MeV. We found a value m? = 827(3)(5) MeV and g??? = 6.67(42) for the resonance mass and coupling constant. Our results are consistent with other lattice studies at similar pion masses and are in good agreement with the prediction from unitarized Chiral Perturbation Theory at NLO. The scattering phase shifts we computed are more evenly distributed throughout the resonance than other studies, and the uncertainty in our measurements is equal to or better than current lattice results at similar pion masses.

Pelissier, Craig S.

302

Stacked insulator induction accelerator gaps  

SciTech Connect

Stacked insulators, with alternating layers of insulating material and conducting film, have been shown to support high surface electrical field stresses. We have investigated the application of the stacked insulator technology to the design of induction accelerator modules for the Relativistic-Klystron Two-Beam Accelerator program. The rf properties of the accelerating gaps using stacked insulators, particularly the impedance at frequencies above the beam pipe cutoff frequency, are investigated. Low impedance is critical for Relativistic-Klystron Two-Beam Accelerator applications where a high current, bunched beam is trsnsported through many accelerating gaps. An induction accelerator module designs using a stacked insulator is presented.

Houck, T.I.; Westenskow, G.A.; Kim, J.S.; Eylon, S.; Henestroza, E.; Yu, S.S.; Vanecek, D.

1997-05-01

303

Stacking energies in DNA.  

PubMed

Variations in base mono- and dipoles result in variations in stacking energies for the 10 unique neighbor pairs in DNA. Stacking energies for pair M on N, expressed as TMN, were derived by matrix decomposition of a large set of linear algebraic expressions relating the measured Tm for subtransitions emanating from large polymeric DNAs, and the fractional neighbor frequencies, fMN, for the domains responsible for the transitions, Tm = sigma fMNTMN. Tm were determined for subtransitions that dissociate in approximately all-or-none fashion in high resolution melting profiles of partially deleted and recombinant forms of pBR322 DNA. Three different analytical maneuvers were undertaken to resolve subtransitions: site-specific cleavage of domains; deletion of domains; and addition of domains. Three dozen domains of widely divergent, quasi-random neighbor frequencies were identified and assigned, resulting in a unique set of values for TMN with standard deviation, sigma = +/- 0.23 degree C. The average difference between calculated and experimental Tm for domains is only +/- 0.17 degree C, indicating that the thermodynamic properties of these domains are not in any way unusual. Assuming delta S to be constant for all pairs, the corresponding delta HMN are found to have a precision of +/- 10 calories.mol-1 and an accuracy of +/- 606 calories.mol-1. TMN used to calculate melting curves by statistical mechanical analysis of sequences of the different plasmid specimens in this study were in quantitative agreement with observed curves for most sequences. These TMN differ significantly from those determined previously and also correlate poorly with values determined by quantum chemical analysis. Stabilities of neighbor pairs, expressed as the difference in free energy between that for a given pair (MN) and that for the average of like pairs (M, N), depend on the relationship of stacked purines and pyrimidines as follows. delta delta Gpu-py(-466 cal) greater than delta delta Gpu-pu(+52 cal) greater than delta delta Gpy-pu(+335 cal) Differences between experimental Tm and Tm calculated with TMN for the isolated neighbor pairs in the B-conformation are useful in the identification of altered structures and unusual modes of dissociation of helixes. A significantly higher Tm is observed for the highly biased repeated sequence synthetic helixes dA.dT, d(AGC).d(GCT), and d(GAT).d(ATC), reflecting auxiliary sources of stability such as bifurcated hydrogen bonds and/or altered structures for these helixes. PMID:1869547

Delcourt, S G; Blake, R D

1991-08-15

304

FAN HOUSE AND STACK NEARLY COMPLETE. CAMERA FACES SOUTHWEST. STACK ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

FAN HOUSE AND STACK NEARLY COMPLETE. CAMERA FACES SOUTHWEST. STACK SHOWS MARKS OF CONCRETE LIFT FORMS. INL NEGATIVE NO. 3381. Unknown Photographer, 9/28/1951 - Idaho National Engineering Laboratory, Test Reactor Area, Materials & Engineering Test Reactors, Scoville, Butte County, ID

305

Measurement of the Branching Fraction and Decay Rate Asymmetry of B to D_pi+ pi- pi0 K-  

SciTech Connect

The authors report the observation of the decay B{sup -} {yields} D{sub {pi}{sup +}{pi}{sup -}{pi}{sup 0}}K{sup -}, where D{sub {pi}{sup +}{pi}{sup -}{pi}{sup 0}} indicates a neutral D meson detected in the final state {pi}{sup +}{pi}{sup -}{pi}{sup 0}, excluding K{sub S}{sup 0}{pi}{sup 0}. This doubly Cabibbo-suppressed decay chain can be used to measure the CKM phase {gamma}. Using about 229 million e{sup +}e{sup -} {yields} B{bar B} events recorded by the BABAR experiment at the PEP-II e{sup +}e{sup -} storage ring, they measure the branching fraction {Beta}(B{sup -} {yields} D{sub {pi}{sup +}{pi}{sup -}{pi}{sup 0}K{sup -}}) = (5.5 {+-} 1.0 (stat.) {+-} 0.7 (syst.)) x 10{sup -6} and the decay rate asymmetry A = -0.02 {+-} 0.16 (stat.) {+-} 0.03 (syst.) for the full decay chain.

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 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. /INFN, Ferrara /Frascati /Genoa U. /INFN, Genoa /Harvard U. /Heidelberg U. /Imperial Coll., London /Iowa U. /Iowa State 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. /INFN, Naples /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /Padua U. /INFN, Padua /Paris U., VI-VII /Pennsylvania U. /Perugia U. /INFN, Perugia /Pisa U. /INFN, Pisa /Prairie View A-M /Princeton U. /Rome U. /INFN, Rome /Rostock U. /Rutherford /DAPNIA, Saclay /South Carolina U. /SLAC /Oregon U. /SLAC /SLAC /Stanford U., Phys. Dept. /SUNY, Stony Brook /Tennessee U. /Texas U. /Texas U., Dallas /Turin U. /INFN, Turin /Trieste U. /INFN, Trieste /Valencia U., IFIC /Vanderbilt U. /Victoria U. /Warwick U. /Wisconsin U., Madison /Yale U.

2005-06-10

306

Observation of $\\Upsilon(4S) decays to$\\pi^+pi^-\\Upsilon(1S)$ and $\\pi^+pi^-\\Upsilon(1S)$  

SciTech Connect

The authors present the first measurement of {Upsilon}(4S) decays to {pi}{sup +}{pi}{sup -} {Upsilon}(1S) and {pi}{sup +}{pi}{sup -} {Upsilon}(2S) based on a sample of 230 x 10{sup 6} {Upsilon}(4S) mesons collected with the BABAR detector. They measure the product branching fractions {Beta}({Upsilon}(4S) {yields} {pi}{sup +}{pi}{sup -} {Upsilon}(1S)) x {Beta}({Upsilon}(1S) {yields} {mu}{sup +}{mu}{sup -}) = (2.23 {+-} 0.25{sub stat} {+-} 0.27{sub sys}) x 10{sup -6} and {Beta}({Upsilon}(4S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(2S)) x {Beta}({Upsilon}(2S) {yields} {mu}{sup +}{mu}{sup -}) = (1.69 {+-} 0.26{sub stat} {+-} 0.20{sub sys}) x 10{sup -6}, from which they derive the partial widths {Lambda}({Upsilon}(4S) {yields} {pi}{sup +}{pi}{sup -} {Upsilon}(1S)) = (1.8 {+-} 0.4) keV and {Lambda}({Upsilon}(4S) {yields} {pi}{sup +}{pi}{sup -}{Upsilon}(2S)) = (2.7 {+-} 0.8) keV.

Aubert, B.

2006-04-19

307

Search for D0--anti-D0 Mixing in the Decays D0 --> K+ pi- pi+ pi-  

SciTech Connect

We present a search for D{sup 0}-{bar D}{sup 0} mixing in the decays D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} using 230.4 fb{sup -1} of data collected with the BABAR detector at the PEP-II e{sup +}e{sup -} collider at SLAC. Assuming CP conservation, we measure the time-integrated mixing rate R{sub M} = (0.019{sub -0.015}{sup +0.016}(stat.) {+-} 0.002(syst.))%, and R{sub M} < 0.048% at the 95% confidence level. Using a frequentist method, we estimate that the data are consistent with no mixing at the 4.3% confidence level. We present results both with and without the assumption of CP conservation. By combining the value of R{sub M} from this analysis with that obtained from an analysis of the decays D{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0}, we find R{sub M} = (0.020{sub -0.010}{sup +0.011})%, where the uncertainty is statistical only. We determine the upper limit R{sub M} < 0.042% at the 95% confidence level, and we find the combined data are consistent with the no-mixing hypothesis at the 2.1% confidence level.

Aubert, B.

2006-09-26

308

Measurement of CP Violation Parameters with a Dalitz Plot Analysis of B+- to D(pi+pi-pi0)K+-  

SciTech Connect

We report the results of a CP violation analysis of the decay B{sup {+-}} {yields} D{sub {pi}{sup +}{pi}{sup -}{pi}{sup 0}}K{sup {+-}}, where D{sub {pi}{sup +}{pi}{sup -}{pi}{sup 0}} indicates a neutral D meson detected in the final state {pi}{sup +}{pi}{sup -}{pi}{sup 0}, excluding K{sub S}{sup 0}{pi}{sup 0}. The analysis makes use of 324 million e{sup +}e{sup -} {yields} B{bar B} events recorded by the BABAR experiment at the PEP-II e{sup +}e{sup -} storage ring. By analyzing the {pi}{sup +}{pi}{sup -}{pi}{sup 0} Dalitz plot distribution and the B{sup {+-}} {yields} D{sub {pi}{sup +}{pi}{sup -}{pi}{sup 0}} K{sup {+-}} branching fraction and decay rate asymmetry, we calculate parameters related to the phase {gamma} of the CKM unitarity triangle. We also measure the magnitudes and phases of the components of the D{sup 0} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup 0} decay amplitude.

Aubert, B.

2007-03-28

309

Amplitude Analysis of the Decay $D_s^+ \\to \\pi^+ \\pi^- \\pi^+$ in the Experiment E831/FOCUS  

SciTech Connect

We present in this thesis the Dalitz Plot analysis of the D{sub s}{sup +} {yields} {pi}{sup +}{pi}{sup -}{pi}{sup +} decay, with the data of the E831/FOCUS, that took data in 1996 and 1997. The masses and widhts of f{sub 0}(980) and f{sub 0}(1370) are free parametres of the fit on Dalitz Plot, objectiving to study in detail these resonances. After this analysis we present the Spectator Model study on the S wave in this decay. For this study we used the formalism developed by M. Svec [2] for scattering. We present the comparison between the Isobar Model, frequently used in Dalitz Plot analysis, and this formalism.

Schilithz, Anderson Correa; /Rio de Janeiro, CBPF

2005-01-01

310

The Search for Exotic Mesons in gamma p -> pi+pi+pi-n with CLAS at Jefferson Lab  

SciTech Connect

The {pi}{sub 1}(1600), a J{sup PC} = 1{sup {-+}} exotic meson has been observed by experiments using pion beams. Theorists predict that photon beams could produce gluonic hybrid mesons, of which the {pi}{sub 1}(1600) is a candidate, at enhanced levels relative to pion beams. The g12 rungroup at Jefferson Lab's CEBAF Large Acceptance Spectrometer (CLAS) has recently acquired a large photoproduction dataset, using a liquid hydrogen target and tagged photons from a 5.71 GeV electron beam. A partial-wave analysis of 502K {gamma}p {yields} {pi}{sup +}{pi}{sup +}{pi}{sup -}n events selected from the g12 dataset has been performed, and preliminary fit results show strong evidence for well-known states such as the a{sub 1}(1260), a{sub 2}(1320), and {pi}{sub 2}(1670). However, we observe no evidence for the production of the {pi}{sub 1}(1600) in either the partial-wave intensities or the relative complex phase between the 1{sup {-+}} and the 2{sup {-+}} (corresponding to the {pi}{sub 2}) partial waves.

Craig Bookwalter

2011-12-01

311

The role of intermolecular interactions in the assemblies of Fe{sup II} and Co{sup II} tetrakis-isothiocyanatometalates with tris(1,10-phenanthroline)-Ru{sup II}: Crystal structures of two dual-metal assemblies featuring octahedral cationic and tetrahedral anionic modules  

SciTech Connect

Two new dual-metal assemblies: 2[Ru(phen){sub 3}]{sup 2+}.[Fe(SCN){sub 4}]{sup 2-}.2SCN{sup -}.4H{sub 2}O 1 and [Ru(phen){sub 3}]{sup 2+}.[Co(SCN){sub 4}]{sup 2-}2, (phen:1,10-phenanthroline), have been prepared and their structures were characterized by X-ray diffraction. In 1, the cationic octahedral enantiomers are arranged with a {lambda}{delta}{lambda}{delta}{lambda} sequence supported by {pi}-{pi} stacking and the anionic inorganic tetrahedral units are oriented between these stacks by interacting with the nearby water molecules through strong O-H...O and O-H...S hydrogen bonds. In 2, homochiral double helices in the b-direction are revealed, with tetrakis-isothiocyanate Co{sup II} anions arranged in the crystal to furnish one-dimensional (1D)-helical chains with S...S intermolecular interactions at 3.512(2) and 3.966(2) A supporting [Ru(phen){sub 3}]{sup 2+}{lambda}- and {delta}-helices with Ru...Ru shortest distance of 8.676(7) A. In both 1 and 2, the supramolecular assembly is maintained by C-H...S hydrogen bonds extending between the phenanthroline aromatic carbons in the cationic nodes and the sulphur atoms of the isothiocyanates anions. Analysis of S...S interactions in isothiocyanate containing compounds using Cambridge structural database (CSD) showed an angle dependence categorizing these interactions into 'type-I' and 'type-II'. - Graphical abstract: Side projection in 2 showing the crankshaft caused by S...S interactions in [Co(NCS){sub 4}]{sup 2-} in-between [Ru{sup II}(phen){sub 3}]{sup 2+} helices. Only isothiocyanates arms of [Co(NCS){sub 4}]{sup 2-} that are part of S...S interactions are shown and [Ru{sup II}(phen){sub 3}]{sup 2+} are presented as polyhedra.

Ghazzali, Mohamed [Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Goeteborg (Sweden)], E-mail: mghazz@chalmers.se; Langer, Vratislav; Ohrstroem, Lars [Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-412 96 Goeteborg (Sweden)

2008-09-15

312

Intermolecular interactions in staphylokinase-plasmin(ogen) bimolecular complex: function of His43 and Tyr44.  

PubMed

Staphylokinase (SAK) forms a 1:1 stoichiometric complex with human plasmin (Pm) and switches its substrate specificity to generate a plasminogen (Pg) activator complex. Site-directed mutagenesis of SAKHis43 and SAKTyr44 demonstrated the crucial requirement of a positively charged and an aromatic residue, respectively, at these positions for optimal functioning of SAK-Pm activator complex. Molecular modeling studies further revealed the role of these residues in making cation-pi and pi-pi interactions with Trp215 of Pm and thus establishing the crucial intermolecular contacts within the active site cleft of the activator complex for the cofactor activity of SAK. PMID:21510941

Dahiya, Monika; Singh, Satish; Rajamohan, Govindan; Sethi, Deepti; Ashish; Dikshit, Kanak L

2011-04-16

313

Spherical Torus Center Stack Design  

SciTech Connect

The low aspect ratio spherical torus (ST) configuration requires that the center stack design be optimized within a limited available space, using materials within their established allowables. This paper presents center stack design methods developed by the National Spherical Torus Experiment (NSTX) Project Team during the initial design of NSTX, and more recently for studies of a possible next-step ST (NSST) device.

C. Neumeyer; P. Heitzenroeder; C. Kessel; M. Ono; M. Peng; J. Schmidt; R. Woolley; I. Zatz

2002-01-18

314

Spherical torus center stack design  

SciTech Connect

The low aspect ratio spherical torus (ST) configuration requires that the center stack design be optimized within a limited available space, using materials within their established allowables. This paper presents certer stack design methods developed by the National Spherical Torus Experiment (NSTX) Project Team during the initial design of NSTX, and more recently for studies of a possible next step ST (NSST) device.

Neumeyer, C. L. [Princeton Plasma Physics Laboratory (PPPL); Peng, Yueng Kay Martin [ORNL

2002-01-01

315

One-way stack automata  

Microsoft Academic Search

A number of operations which either preserve sets accepted by one-way stack automata or preserve sets accepted by deterministic one-way stack automata are presented. For example, sequential transduction preserves the former; set complementation, the latter. Several solvability questions are also considered.

Seymour Ginsburg; Sheila A. Greibach; Michael A. Harrison

1967-01-01

316

Die Stacking (3D) Microarchitecture  

Microsoft Academic Search

D die stacking is an exciting new technology that in- creases transistor density by vertically integrating two or more die with a dense, high-speed interface. The result of 3D die stacking is a significant reduction of interconnect both within a die and across dies in a system. For instance, blocks within a microprocessor can be placed vertically on multiple die

Bryan Black; Murali Annavaram; Ned Brekelbaum; John Devale; Lei Jiang; Gabriel H. Loh; Don McCauley; Pat Morrow; Donald W. Nelson; Daniel Pantuso; Paul Reed; Jeff Rupley; Sadasivan Shankar; John Paul Shen; Clair Webb

2006-01-01

317

Mutation detection by stacking hybridization on genosensor arrays.  

PubMed

A new strategy for analysis of point mutations using oligonucleotide array (genosensor) hybridization was investigated. In the new approach, a single-stranded target strand is preannealed with a labeled "stacking oligonucleotide," and then the partially duplex labeled target molecule is hybridized to an array of glass-tethered oligonucleotide probes, targeted to the region on the target immediately adjacent to the stacking oligomer. In this configuration, the base-stacking interactions between the "capture probe" and the contiguously stacking oligomer stabilize the binding of the target molecule to its complementary probe on the genosensor array. The temperature of hybridization can be adjusted so that the target molecule will bind to the glass-tethered probe only in the presence of the stacking oligomer, and a single mismatch at or near the terminal position ol the capture probe disrupts the stacking interactions and thereby eliminates or greatly reduces the hybridization. This stacking hybridization approach was investigated using a collection of synthetic targets, probes, and stacking oligonucleotides, which permitted identification of conditions for optimal base mismatch discrimination. The oligonucleotide probes were tethered to the glass using a simple, improved attachment chemistry in which a 3'-aminopropanol function introduced into the probe during chemical synthesis binds covalently to silanol groups on clean, underivatized glass. "Operating parameters" examined in the stacking hybridization system included length of capture probe, position, type and number of mismatches between the probe and the target, temperature of hybridization and length of washing, and the presence of terminal phosphate group in the probe, at its junction with the stacking oligomer. The results suggest that in the stacking hybridization configuration: 1. Optimal mismatch discrimination with 9-mer probes occurs at 45 degrees C, after which little or no improvement in mispair rejection occurred on lengthy continued washing at 45 degrees C. 2. At 25 degrees C optimal mismatch discrimination occurred with 7- or 8-mer probes, or with 9-mer probes containing an additional internal mismatch. 3. The presence of a phosphate group on the 5'-end of the glass-tethered probe had no general effect on mismatch discrimination, but influenced the relative stability of different mismatches in the sequence context studied. These results provide a motivation for continued development of the stacking hybridization technique for nucleic acid sequence analysis. This approach offers several advantages over the traditional allele-specific oligonucleotide hybridization technique, and is distinct from the contiguous stacking hybridization sitrategy that the Mirzabekov laboratory has introduced (Yershov et al. (1996) Proc. Natl. Acad. Sci. USA 93, 4913-4918; Parinov et al. (1996) Nucleic Acids Res. 24, 2998-3004). PMID:10367279

Maldonado-Rodriguez, R; Espinosa-Lara, M; Loyola-Abitia, P; Beattie, W G; Beattie, K L

1999-02-01

318

Structural Consequences of Anionic Host-Cationic Guest Interactions in a Supramolecular Assembly  

SciTech Connect

The molecular structure of the self-assembled supramolecular assembly [M{sub 4}L{sub 6}]{sup 12-} has been explored with different metals (M = Ga{sup III}, Fe{sup III}, Ti{sup IV}) and different encapsulated guests (NEt{sub 4}{sup +}, BnNMe{sub 3}{sup +}, Cp{sub 2}Co{sup +}, Cp*{sub 2}Co{sup +}) by X-ray crystallography. While the identity of the metal ions at the vertices of the M{sub 4}L{sub 6} structure is found to have little effect on the assembly structure, encapsulated guests significantly distort the size and shape of the interior cavity of the assembly. Cations on the exterior of the assembly are found to interact with the assembly through either {pi}-{pi}, cation-{pi}, or CH-{pi} interactions. In some cases, the exterior guests interact with only one assembly, but cations with the ability to form multiple {pi}-{pi} interactions are able to interact with adjacent assemblies in the crystal lattice. The solvent accessible cavity of the assembly is modeled using the rolling probe method and found to range from 253-434 {angstrom}{sup 3}, depending on the encapsulated guest. Based on the volume of the guest and the volume of the cavity, the packing coefficient for each host-guest complex is found to range from 0.47-0.67.

Pluth, Michael D.; Johnson, Darren W.; Szigethy, Geza; Davis, Anna V.; Teat, Simon J.; Oliver, Allen G.; Bergman, Robert G.; Raymond, Kenneth N.

2008-07-09

319

Structural consequences of anionic host-cationic guest interactions in a supramolecular assembly.  

PubMed

The molecular structure of the spontaneously assembled supramolecular cluster [M(4)L(6)](n-) has been explored with different metals (M = Ga(III), Fe(III), Ti(IV)) and different encapsulated guests (NEt(4)(+), BnNMe(3)(+), Cp(2)Co(+), Cp*(2)Co(+)) by X-ray crystallography. While the identity of the metal ions at the vertices of the M(4)L(6) structure is found to have little effect on the assembly structure, encapsulated guests significantly distort the size and shape of the interior cavity of the assembly. Cations on the exterior of the assembly are found to interact with the assembly through either pi-pi, cation-pi, or CH-pi interactions. In some cases, the exterior guests interact with only one assembly, but cations with the ability to form multiple pi-pi interactions are able to interact with adjacent assemblies in the crystal lattice. The solvent accessible cavity of the assembly is modeled using the rolling probe method and found to range from 253-434 A(3), depending on the encapsulated guest. On the basis of the volume of the guest and the volume of the cavity, the packing coefficient for each host-guest complex is found to range from 0.47-0.67. PMID:19053347

Pluth, Michael D; Johnson, Darren W; Szigethy, Géza; Davis, Anna V; Teat, Simon J; Oliver, Allen G; Bergman, Robert G; Raymond, Kenneth N

2009-01-01

320

Dynamic insight into the interaction between porphyrin and G-quadruplex DNAs: time-resolved fluorescence anisotropy study.  

PubMed

Understanding the nature of the interaction between small molecules and G-quadruplex DNA is crucial for the development of novel anticancer drugs. In this paper, we present the first data on time-resolved fluorescence anisotropy study on the interaction between a water-soluble cationic porphyrin H(2)TMPyP4 and four distinct G-quadruplex DNAs, that is, AG(3)(T(2)AG(3))(3), thrombin-binding aptamer (TBA), (G(4)T(4)G(4))2, and (TG(4)T)4. The anisotropy decay curves show the monoexponential for free H(2)TMPyP4 and the biexponential upon binding to the excess amount of G-quadruplex DNAs. The biexponential anisotropy decay can be well interpreted using a wobbling-in-the-cone model. The orientational diffusion of the bound H(2)TMPyP4 is initially restricted to a limited cone angle within the G-quadruplex DNAs, and then an overall orientational relaxation of the G-quadruplex DNA-H(2)TMPyP4 complexes occurs in a longer time scale. It was found that the dynamics of the restricted internal rotation of bound H(2)TMPyP4 strongly depends on the ending structures of the G-quadruplex DNAs. According to the order parameter (Q) calculated from the wobbling-in-the-cone model, we deduce that the degree of restriction around the bound H(2)TMPyP4 follows the order of TBA > (TG(4)T)4 > AG(3)(T(2)AG(3))(3) > (G(4)T(4)G(4))2. Especially, based on the maximum order parameter (Q) of bound H(2)TMPyP4 within TBA, a new sandwich-type binding mode for TBA-H(2)TMPyP4 complex was proposed in which both terminal G-quartet and T*T base pair stack on the porphyrin ring through pi-pi interaction. This study thus provides a new insight into the interaction between G-quadruplex DNAs and H(2)TMPyP4. PMID:19924868

Jia, Guoqing; Feng, Zhaochi; Wei, Chunying; Zhou, Jun; Wang, Xiuli; Li, Can

2009-12-17