A measurement of the weak form factors of the proton gives access to the contribution of the strange quarks to the vector form factors of the nucleon due to the electro-weak mixing. The parity violation of the weak interaction gives rise to a parity violating cross section asymmetry and is utilized to measure the ...

Specific features are considered for effects of the parity violation in N anti N systems. A parity violating N anti N potential is constructed and the circular polarization P sub (gamma) is estimated for gamma quanta emitted by the system. The obtained va...

A short history of parity violation is given, leading to the present use of parity violating electron scattering for studying the nucleon internal structure. The status of the G0 and HAPPEX experiments presently running at Jefferson Lab is discussed. Some preliminary results are shown.

A short history of parity violation is given, leading to the present use of parity violating electron scattering for studying the nucleon internal structure. The status of the G and HAPPEX experiments presently running at Jefferson Lab is discussed. Some preliminary results are shown.

�invariant parity violating operators from spontaneously acquiring vacuum expectation values. However, it does not rule out Lorentz�noninvariant parity�violating operators from acquiring expectation values. Other a vacuum expectation value. However, this does not rule at parity violation ...

This paper briefly discusses parity violation in certain electron reaction experiments. Neutral weak currents and Weinberg angles measurements are discussed. (LSP)

Using a new operator notation, the authors present a systematic study of all possible R-parity violating signals at a hadron collider.

The potential for utilizing parity violating effects, associated with polarized protons, to study the standard model, proton structure, and new physics at the SPS Collider is summarized. 24 references.

The generalization of the Vafa-Witten theorem, ruling out parity violation to QCD at finite temperature is considered. It is shown that this generalization of the theorem rules out Lorentz-invariant parity violating operators from spontaneously acquiring vacuum expectation values. However, it does not rule out ...

The report mentions dispersion theory, algebraic theory, and charge parity violations of elementary particles.

I have been asked to set stage for the more specialized talks to follow and to review the history of parity nonconservation in electron scattering. In electron scattering, parity violation (PV) is the unique signal which allows us to study the weak intera...

The historical background behind the discovery of the violation of parity by T. D. Lee and (N. Yand is described. The experimental techniques used by Chien-Shiung Wu, Ernst Ambler, and their collaborators at the Cryogenic Physics Laboratory of the NBS to first demonstrate the violation of parity are also described. ...

The A4 collaboration at the MAMI accelerator at Mainz investigates the contribution of strange quarks to the form factors of the nucleon by measuring the parity violating asymmetry A PV in the cross section of elastic scattering of longitudinally polarized electrons off hydrogen and deuterium. Recently, measurements at backward angles at a four momentum ...

We analyze the CP violation in the semileptonic |{delta}S|=1 {tau} decays in supersymmetric extensions of the standard model with R parity violating term. We show that the CP asymmetry of {tau} decay is enhanced significantly and the current experimental limits obtained by CLEO collaborations can be easily accommodated. We argue that ...

New bounds on long-range parity violation in gravitation are reported from inconclusive searches of parity violating energy differences (PVED) in chiral molecules. In particular, it is found that Leitner-Okubo-Hari Dass's {alpha}{sub 2} (or A{sub 2}) parameter is constrained by current experimental ...

We discuss time-reversal-violation in the nucleon-nucleon interaction, both parity-conserving and with simultaneous parity violation, and consider its effects in some low-energy nuclear processes. 59 refs.

The status of the TRIUMF 221 MeV proton-proton violation experiment is reviewed. Several other proton-proton parity violation experiments in the in the intermediate energy range, currently in various stages of preparation, are discussed. A new experiment ...

and thus Lorentz invariance of vacuum expectation values is contradicted by parity violation. In particle on physical requirement of vacuum expectation values; besides doubts on parity violation, the assumption################ Revised Version arXiv:hep�ph/0211005 v4 18 Oct 2004 The Origin of CP ...

This report contains papers on the following: the Bates parity violation experiment; parity violation in the nuclear domain; the weak neutral current in the standard model; measurement of parity nonconservation in the proton-proton total cross section at ...

We study parity violation in graviton non-gaussianity generated during inflation. We develop a useful formalism to calculate graviton non-gaussianity. Using this formalism, we explicitly calculate the parity violating part of the bispectrum for primordial gravitational waves in the exact de Sitter spacetime and ...

The minimal flavor violation hypothesis (MFV) is extended to the R-parity violating minimal supersymmetric standard model, supplemented with a simple seesaw mechanism. The requirement of MFV is shown to suppress lepton- and baryon-number violating couplings sufficiently to pass all experimental bounds, in ...

A violation of the requirements of this subpart is a violation of the applicable provisions of the Act and is subject to the penalty provisions thereunder. (1) A person who violates § 90.1003(a)(1), (a)(4), or (a)(5), or a manufacturer or dealer who violates §...

The contribution of strange quark/anti-quark pairs to the properties of the nucleon has been a topic of considerable interest for some time. While ss pairs are clearly observed in deep-inelastic scattering processes, and have reasonably well-determined parton distribution functions, their influence on static nucleon properties, such as the scaler, axial and vector matrix elements, is more ...

We present a new powerful liquid hydrogen target developed for the precise study of parity violating electron scattering on hydrogen and deuterium. This target has been designed to have minimal target density fluctuations under the heat load of a 20$\\mu$A CW 854.3 MeV electron beam without rastering the electron beam. The target cell has a wide aperture ...

We present a new powerful liquid hydrogen target developed for the precise study of parity violating electron scattering on hydrogen and deuterium. This target has been designed to have minimal target density fluctuations under the heat load of a 20?A CW 854.3 MeV electron beam without rastering the electron beam. The target cell has a wide aperture for ...

It is shown that the observed parity violation in neutral weak interactions can be explained in the framework of the SU (6) model of vector-like weak currents. The resulting solution imposes strong constraints on the character of the interactions of heavy quarks.

The simplest way of explaining the result A(sigma-plus/neutron pion-plus) = 0 is to assume an effective parity-violating Hamiltonian. With no further assumptions, this Hamiltonian predicts two sum rules which are closely related to the Lee-Sugawara triang...

It is shown that the number of independent operators in the nucleon-nucleon parity violating contact Lagrangian at the leading order in the low-momentum expansion can be reduced to five by using Fierz rearrangements of the nucleon fields.

We find that quark model calculations tend to produce large (approx. 10/sup -6/) values for the parity violating asymmetry in polarized proton-unpolarized nucleon scattering.

Parity-violating nuclear force, as may be accessed from parity-violation studies in nuclear systems, represents an area of nonleptonic weak interactions that has been the subject of experimental investigations for several decades. In the simple meson-exchange picture, a parity-violating nuclear force may be parametrized as arising from ...

Parity-violating nuclear force, as may be accessed from parity-violation studies in nuclear systems, represents an area of nonleptonic weak interactions that has been the subject of experimental investigations for several decades. In the simple meson-exchange picture, a parity-violating nuclear force may be parametrized as arising from ...

With longitudinally polarized protons at RHIC, even a 1 month dedicated run utilizing both approved major detectors could produce a significant search for new physics in hadron collisions via parity violation. Additionally, in the energy range of RHIC, la...

The current status of investigations into parity and time-reversal violation in nuclei is reviewed. The author focuses on the P-odd NN interaction and its use as a probe of the weak interaction. This approach uses reactions involving light nuclei where st...

We review the program of parity violation in the scattering of polarized electrons at JLab. Results are presented from recent experiments measuring the weak form factors, which in turn measure the contribution of strange quarks to the elastic form factors...

The Weinberg-Salam Unified Model of weak and electromagnetic interactions has been very successful in explaining parity violation and neutral current effects in neutrino-nucleon, electron-nucleon and neutrino-electron interactions. A wide variety of nucle...

Measuring the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from protons is a practical technique for determining the contribution of strange quarks to the charge radius and magnetic moment of the nucleon. First results have recently been published by JLab and MIT-Bates.

This paper discusses the use of electron scattering experiments for exploring parity violation in the nuclear domain. It is shown how such experiments can test the structure of strong interactions, the local gauge theory quantum chromodynamics based on color, and the unified gauge theory of electroweak interactions.

A parity violating effect of interest in the n + p implies d + gamma reaction is the asymmetry alpha in the photon angular distribution with respect to an initial neutron polarization. Calculations of alpha , using a two-nucleon Reid soft core potential, ...

Parity violating asymmetry in high energy proton-nucleon scattering has been studied using the Glauber theory and meson exchange potential model for weak interactions. By varying the weak interaction parameters within the allowed range, we find that it is...

This report discusses the measurement of parity-violating asymmetries in the compound nucleus; summary of data on this process; theories of the random asymmetry, M(sup 2); and theories of the constant asymmetry.

This report discusses the measurement of parity-violating asymmetries in the compound nucleus; summary of data on this process; theories of the random asymmetry, M{sup 2}; and theories of the constant asymmetry.

We study in the framework of R-parity violating supersymmetric theories the effect of R-parity violation due to the operator LiLjEkoverline on the (V-A) structure of the muon decay. The precisely measured muon decay parameters can constrain a product of R-parity ...

We consider parity-violating observables from the processes n?p?d? and np?d?⥀. We perform calculations using pionless effective field theory both with and without explicit dibaryon fields. After combining these results with ones we have already obtained on parity-violating asymmetries in N?N scattering, experimental input would in principle ...

Searches for parity violating effects of quark substructure and tests of spin dependence predicted by QCD are discussed.

A measurement of parity-violating spin-dependent {gamma}p(vector sign) Compton scattering will provide a theoretically clean determination of the parity-violating pion-nucleon coupling constant h{sub {pi}}{sub NN}{sup (1)}. We calculate the leading parity-violating amplitude arising from one-loop pion graphs in chiral perturbation ...

... Descriptors : (*DECAY SCHEMES, *K MESONS), PIONS, MUONS, PROTONS, GAMMA RAYS, NUCLEAR SPINS, PARITY, INTERACTIONS, BETA ...

This paper discusses: neutrino interactions at LAMPF; parity violation in polarized ep scattering; and superconducting detector development.

A proposal is made to measure the parity-violating energy difference between enantiomers of chiral molecules by modifying the dynamics of the two-state system using an external chiral field, in particular, circularly polarized light. The intrinsic molecular parity-violating energy could be compensated by this external chiral field, with the subsequent ...

A proposal is made to measure the parity-violating energy difference between enantiomers of chiral molecules by modifying the dynamics of the two-state system using an external chiral field, in particular, circularly polarized light. The intrinsic molecular parity-violating energy could be compensated by this external chiral field, with the subsequent ...

The model of parity violation in the fission of atomic nuclei by polarized s-neutrons followed by asymmetry of fragment angular distribution is developed. The model is based on the assumption of mixing the opposite parity states in the region of the first...

This paper describes three proposed experiments for observing the breakdown of parity in atomic transitions due to the exchange of neutral, parity-violating currents arising from some of the new gauge models (e.g., the Weinberg model) for the weak interac...

Supersymmetric models with explicit R-parity violation can induce new rare decay modes of the Z boson into single supersymmetric particles. Here, the rate and signature for one such decay, Z {yields} {tilde {upsilon}} {gamma}, is examined, where it is found that the rate is at least an order of magnitude smaller than that for the process Z{yields} ...

Supersymmetric models with explicit R-parity violation can induce new rare decay modes of the Z boson into single supersymmetric particles. Here, the rate and signature for one such decay, Z {yields} {tilde {upsilon}} {gamma}, is examined, where it is found that the rate is at least an order of magnitude smaller than that for the process Z{yields} ...

Temperature-dependent ultrasonic study on parity-violating phase transitions of D- and L-alanine technology was utilized to probe the molecular parity violation on phase transitions of alanine enantiomers. Temperature-dependent longitudinal ultrasonic attenuation and velocity were measured in D- and L-alanine

We consider the s-channel R-parity-violating production of a single light top squark (tilde t)(sub 1) and its subsequent R-parity-conserving decay. For masses in the range 180-325 GeV, and R-parity-violating couplings (lambda)(sub 3ij)(double-prime) &...

The existence of R-parity violating interactions in supersymmetric models leads to various rare processes at low energies, deviations from the standard model predictions on weak interactions and new signals in collider experiments. The present limits on R-violating couplings in the minimal low energy supergravity model are derived. The ...

We summarize recent results on parity-violation in few-nucleon systems, including pp elastic scattering and np radiative capture. These results are relevant to recent or present experimental measurements at TRIUMF and LANSCE, respectively. We also present results for other potential or planned experiments, summarizing the contributions they will make to understanding the weak ...

Parity violation induced by the chromo-anapole form factor of the bottom quark, generated from weak corrections, is studied in polarized hadron collisions. The forward-backward asymmetry in the bottom quark pair production at polarized pp and p{anti p} colliders is evaluated in the Standard Model and in a Two Higgs Doublet Model to examine the effects of ...

We discuss a new parity-violating mechanism specific for nucleons bound in the nucleus. The mechanism consists of weak emissions and absorptions of mesons by a single nucleon in the presence of the strong nuclear field, and generates a parity-violating correction to the nuclear potential. The contribution of the low-mass mesons ..pi.., rho, and ..omega.. ...

We briefly review the apparent experimental discrepancies that sustain interest in the field of lowenergy few-nucleon parity violation. We argue that it is not possible to determine whether present experimental measurements are consistent unless each is understood in terms of a complete EFT with consistent power counting. Towards this end, we present the ...

We review the program of parity violation in the scattering of polarized electrons at JLab. Results are presented from recent experiments measuring the weak form factors, which in turn measure the contribution of strange quarks to the elastic form factors. In addition, we discuss the physics of parity violation in ...

We review the program of parity violation in the scattering of polarized electrons at JLab. Results are presented from recent experiments measuring the weak form factors, which in turn measure the contribution of strange quarks to the elastic form factors. In addition, we discuss the physics of parity violation in ...

We present results from direct searches for leptoquarks and R-parity violating SUSY particles by the CDF experiment. These results strongly constrain the interpretation of the recently reported high Q{sup 2} event excess at HERA as leptoquark or R-parity violating SUSY production.

Fundamental symmetry studies using intense polarized beams of epithermal neutrons are underway at the LANSCE facility of the Los Alamos National Laboratory. Three classes of symmetry experiments can be explored: parity violation, and time reversal invariance violation for both parity-violating and ...

We consider a three-dimensional model of two-component spinors with a quadrilinear self-interaction. In the 1/{ital N} expansion the model turns out to be renormalizable and a mass term is generated, violating parity. This allows for the generation of a Chern-Simons term if the spinor is coupled to an external gauge field. Parity ...

At low energies, parity violation in NN scattering (including photons) is described by an effective field theory (EFT) that includes only contact interactions. I will discuss this EFT, and its application to observables that would be zero in the absence of parity violation: longitudinal asymmetries in polarized ...

observable in the #12;nal state which has a nonzero expectation value, this demonstrates a violation of parity in the interaction. If it is true that an expected signal due to parity violation is too small to be observed of the expected CP violation can and should lead us in our choice of ...

It has recently been shown that by measuring the transverse polarizations of the final particles in ?+?e+e-e+, it is possible to extract information on the phases of the effective couplings leading to this decay. We examine this possibility within the context of R-parity violating Minimal Supersymmetric Standard Model (MSSM) in which the ?+?e+e-e+ process ...

For modern parity violation experiments it is crucial to measure and monitor the electron beam polarization continuously. In the recent years different high-luminosity concepts, for precision Compton backscattering polarimetry, have been developed, to be used at modern CW electron beam accelerator facilities. As Compton backscattering polarimetry is free ...

Charge conjugation (C) and parity (P) are introduced, and understanding of P and C violation is reviewed. The origin of CP violation; conditions for CP violation; angle-independent parametrization of the quark mixing matrix; and CP triangles and the CP-vi...

Atomic parity violation has been observed in the 6s(2 1)S(0)-->5d6s(3)D(1) 408-nm forbidden transition of ytterbium. The parity-violating amplitude is found to be 2 orders of magnitude larger than in cesium, where the most precise experiments to date have been performed. This is in accordance with theoretical predictions and ...

We calculate in chiral perturbation theory the parity-violating two-pion exchange nucleon-nucleon potentials at leading one-loop order. At a distance of r=m{sub {pi}}{sup -1}{approx_equal}1.4 fm they amount to about {+-}16% of the parity-violating 1{pi} exchange potential. We evaluate also the parity-violating effects arising from ...

I'll discuss the experiments in which parity violation has been measured in low energy neutron-nucleus scattering. The interest is two-fold: to understand how parity violation in the nucleon-nucleon (NN) interaction manifests itself in a complicated many-body system and to show that the large enhancements ...

We present a method for measuring atomic parity violation in the absence of static external electric and magnetic fields. Such measurements can be achieved by observing the interference of parity-conserving and parity-violating two-photon transition amplitudes between energy eigenstates of zero electronic angular ...

We point out the possibility of spontaneous and hard {ital CP} violation in the scalar potential of the {ital R}-parity broken supersymmetric standard model. The existence of spontaneous {ital CP} violation depends crucially on the {ital R}-parity-breaking terms in the superpotential and, in addition, on the choice ...

The parity non-conserving asymmetry for elastic scattering of polarized neutrons in the energy region around compound nucleus resonances is considered. The mechanism of virtual excitation of the parity admixed compound nucleus state is used. The parity conserving elastic amplitudes are dominated by s wave, but the simultaneous presence ...

Discrete symmetries in {ital N}=2 supersymmetric theories are investigated by the method of harmonic superspace. The theorem of the strict conservation of spatial parity in these theories without central charges and with one central charge is proved. For two central charges the theorem is no longer true, and a corresponding example of an {ital N}=2 theory in which spatial ...

Two investigations by the parity violating electron scattering are performed theoretically: one is to investigate the properties of the surface for neutron-rich nuclei such as {sup 124}Sn and {sup 208}Pb, and the other is to predict the parity violating asymmetries for some isotopic chains, such as Ba and Pb, which ...

Two investigations by the parity violating electron scattering are performed theoretically: one is to investigate the properties of the surface for neutron-rich nuclei such as Sn124 and Pb208, and the other is to predict the parity violating asymmetries for some isotopic chains, such as Ba and Pb, which have been ...

R-parity violating terms in the minimal supersymmetric extension of the Standard Model are studied within a parametrization characterized by a single vacuum expectation value for the scalar components of the Y=-1/2 superfields. The benefits of this efficient parametrization are that it enables phenomenological analyses of R-parity ...

We investigate the possible measurement of parity-violating spin asymmetries in jet pair production in proton-proton collisions at the Brookhaven Relativistic Heavy Ion Collider (RHIC), with the goal to constrain longitudinally polarized quark and antiquark distribution functions. A measurable asymmetry could be observed in the vicinity of the massive weak W boson resonance, ...

We investigate the possible measurement of parity-violating spin asymmetries in jet pair production in proton-proton collisions at the Brookhaven Relativistic Heavy Ion Collider (RHIC), with the goal to constrain longitudinally polarized quark and antiquark distribution functions. A measurable asymmetry could be observed in the vicinity of the massive weak W boson resonance, ...

In this Letter, I argue that a parity violating extension to general relativity can simultaneously explain the observed loss in power and provides a first step for explaining the alignment at a preferred axis (�Axis of Evil�) in the low multipole moments of the WMAP data. This observational possibility also provides an experimental window for an ...

Single-top-squark production probes R-parity-violating extensions of the minimal supersymmetric standard model though the (lambda)(sub 3ij)(double-prime) coupling. For top-squark masses in the range 180-325 GeV, and (lambda)(sub 3ij)(double-prime) > 0.02-...

I discuss the present status of our understanding of parity nonconservation (PNC) in the nucleon-nucleon interaction, and some of the difficulties inherent in nuclear tests of PNC. I also discuss the nucleon/nuclear anapole moment, the parity violating coupling of the photon, and its relation to the PNC NN interaction. 13 refs., 1 ...

Recent observations of parity violation in inelastic scattering of electrons at high energy is discussed with reference to the process e(polarized) + D(unpolarized) ..-->.. e + X. The kinetics of this process, the idealized case of scattering from free quark targets, experimental techniques and results, and relations to atomic physics of ...

The study of parity violation in total (n,(gamma)) cross sections on (sup 139)La and (sup 117)Sn targets was performed at the LANSCE pulsed neutron source using longitudinally polarized neutrons and a BaF(sub 2) detector. The effect of parity nonconservat...

Parity violating electron scattering has become a well established tool which has been used, for example, to probe the Standard Model and the strange-quark contribution to the nucleon. While much of this work has focused on elastic scattering, the RES-Parity experiment, which has been proposed to take place at Jefferson Laboratory, ...

Parity violating electron scattering has become a well established tool which has been used, for example, to probe the Standard Model and the strange-quark contribution to the nucleon. While much of this work has focused on elastic scattering, the RES-Parity experiment, which has been proposed to take place at Jefferson Laboratory, ...

The results of broad searches for schemes that are convenient for observing effects of time-inversion-invariance violation (T violation) simultaneously with parity violation (PT violation) in electromagnetic transitions in nuclei are presented. The main problems in observing such effects are ...

Details of the calculation of two-boson exchange effects in parity-violating elastic ep scattering within a simple hadronic model, including both the nucleon and the ?(1232)-resonance intermediate states, are presented. We examine the sensitivity of our results with respect to choice of form factors. We emphasize the importance of using correct relations relating N?? and ??N ...

with high multiplicities. BHF occurs, might expect large violations baryon number, charge conjugation parity conserved only in hadronic interactions, can expected show large violations if BHF subsequent decay HawkingarXiv:hep�ph/0211365 v1 22 Nov 2002 ################ Charge Conjugation and Parity ...

The advent of the 12-GeV upgrade at JLab will present an excellent opportunity to study parity violation in deep inelastic scattering at high values of x. The physics issues in this domain include charge symmetry violation, quark-quark correlations in the nucleon, and tests of the Standard Model. This program will require a ...

R-parity-violating supersymmetry (with a conserved baryon number B) provides a framework for particle physics with lepton number (L) violating interactions. We examine in detail the structure of the most general R-parity-violating (B-conserving) model of low-energy supersymmetry. We analyze the mixing of Higgs bosons with sleptons and ...

A logical analysis is undertaken on the meaning of the statement of parity conservation for magnetic monopoles. A comparison is made with similar classical situations. A twofold meaning of parity arises from the discussion, and a group-theoretical method is employed in order to define a weak and a strong parity. Such a ...

We propose a theoretical framework for R-parity violation. It is realized by a class of Calabi-Yau compactification of heterotic string theory. Trilinear R-parity violation in superpotential is either absent or negligibly small without an unbroken symmetry, due to a selection rule based on charge counting of a ...

The Coulomb electron scattering on even-even nuclei and the magnetic electron scattering on odd-A nuclei have been investigated in the relativistic eikonal approximation and in the plane wave Born approximation, respectively. In this article, we generalize the relativistic eikonal approximation to the parity violating electron scattering on even-even ...

The Coulomb electron scattering on even-even nuclei and the magnetic electron scattering on odd-A nuclei have been investigated in the relativistic eikonal approximation and in the plane wave Born approximation, respectively. In this article, we generalize the relativistic eikonal approximation to the parity violating electron scattering on even-even ...

We investigate parity-violating asymmetries in np radiative capture at thermal neutron energies and in deuteron electro-disintegration in quasi-elastic kinematics, using the DDH model for the parity-violating nucleon-nucleon interaction. We find dramatic cancellations between the asymmetries induced by the parity-violating interactions ...

A review of atomic calculations relevant to the Bi parity nonconservation experiments is presented. The following were included to date: relativistic Hartree-Fock, intermediate coupling, configuration mixing and RPA-type shielding. There is disagreement b...

The authors present an outlook for possible discovery of supersymmetry with broken R-parity at Run II of the Tevatron. They first present a review of the literature and an update of the experimental bounds. In turn they then discuss the following processe...

Several experiments are in progress to measure parity violation in strong interactions. The g-factors of eight high-spin isomeric states in four gadolinium isotopes have been added to the previously determined spin and parity data. Existing data on neutro...

Some consequences of possible violation of parity (P), charge conjugation (C), time reversal (T), and TCP invariance in the gravitation interaction are discussed and compared with existing experimental evidence. The evidence is suggestive of TCP (or CP or...

The abilities to observe the parity violation at the radiofrequency transitions between the hyperfine and Zeeman terms of the atomic levels are considered. The E-1 amplitudes fo the Zeeman transitions of heavy atoms in weak magnetic fields are larger than...

Results of a measurement of parity nonconservation in the anti p-p total cross sections at 800-MeV are presented. The dependence of transmission on beam properties and correction for systematic errors are discussed. The measured longitudinal asymmetry is ...

The possibility to extract from the experiment the necessary informations concerning the neutral current contributions to the structure of the weak interactions that violate the parity conservation low is investigated. The parity nonconservation (PNC) ind...

The consequences are considered of the experiments performed by Wu et al. (1956) and by Fitch, Cronin et al. (1964). A hypothesis is discussed that explains these experiments without violation of the parity and charge symmetries. An experimental test of t...

Experiments are described to test a theory for the origin of optical activity wherein the longitudinally polarized electrons resulting from parity violation during radioactive beta decay, and their resulting circularly polarized Bremsstrahlung, might inte...

Fifteen excited 'even-parity' levels of donor impurities in Si are identified. Observed photoexcitation to these levels in violation of electric-dipole selection rules is attributed to effects of polarization of the donor by other defects and to breakdown...

The contribution from the inner shells to the matrix elements of a parity violating weak interaction is examined. It is shown that the correction thus obtained does not compensate the effect but rather increases it by 20 to 40%.

A comparison of the phenomenological matrix elements of the neutron-nucleus weak interaction obtained from the analysis of experiments of integral and differential types is performed. The relative contribution of different parity-mixing mechanisms into ob...

of the \\Lambda. The coupling constants A and B are deter� mined by the parity conserving and parity violating Ministerio de Ciencia y Tecnolog'ia. References [1] E. Oset, P. Fernandez de Cordoba, L. L. Salcedo and R

In this Rapid Communication we discuss some observations concerning the possible local parity violation in heavy ion collisions recently announced by the STAR Collaboration. Our results can be summarized as follows (i) the measured correlations for same-charge pairs are mainly in-plane and not out of plane, (ii) if there is a ...

The ALEPH collaboration has recently reported a significant excess of four-jet events at the LEP 1.5 and LEP 2 experiments. While not yet confirmed by the other collaborations, it was recently proposed that this excess may be explained by certain R-parity violating operators in supersymmetric models. R-parity ...

In supersymmetric models with R-parity violation, sneutrinos may be produced as channel resonances at {mu}{sup +}{mu}{sup {minus}} colliders. The authors demonstrate that, for R-parity violating couplings as low as 10{sup {minus}4}, sneutrino resonances may be observed and may be exploited to yield high precision ...

The parity-violating E1 transitions between the n = 2 levels of atomic helium, induced by the electron-electron neutral weak interaction have been computed by using Coulomb-type wave functions and (up to 84 parameter) Hylleraas wave functions. The parity-violating matrix elements turn out to be of the same order of magnitude as those due to the ...

Parity violation in p-wave neutron resonances of 121Sb, 123Sb, and 127I has been measured by transmission of a longitudinally polarized neutron beam through natural antimony and iodine targets. The measurements were performed at the pulsed spallation neutron source of the Los Alamos Neutron Science Center. Five statistically significant ...

Parity-violating effects for low-energy elastic neutron deuteron scattering are calculated for Desplanques, Donoghue, and Holstein (DDH) and effective field theory types of weak potentials in a distorted-wave Born approximation, using realistic hadronic strong interaction wave functions, obtained by solving three-body Faddeev equations in configuration space. The resulting ...

Geometrical scaling is a remarkable phenomena found in HERA. In this paper, we study the small-x behavior for the parity violating deep inelastic scattering, in particular considering the neutral current and charge current contributions, through photon, Z and W bosons exchanges by using their wave functions. We find geometrical scaling not only in the case ...

A measurement of the weak form factor of the proton allows a flavor separation of the strangeness contribution to the electromagnetic form factors. The weak form factor is accessed experimentally by the measurement of a parity violating (PV) asymmetry in the scattering of polarized electrons on unpolarized protons. An extended experimental program to ...

Determinations of vuds with super-allowed Fermi beta-decay in nuclei and of the weak charge of the cesium in atomic parity-violation deviate from the Standard Model predictions by 2 sigma or more. In both cases, the Standard Model over-predicts the magnitudes of the relevant observables. I discuss the implications of these results for R-parity ...

We show that a supersymmetric standard model exhibiting anomaly mediated supersymmetry breaking can generate naturally the observed neutrino mass spectrum as well mixings when we include bilinear R-parity violation interactions. In this model, one of the neutrinos gets its mass due to the tree-level mixing with the neutralinos induced by the ...

QED radiative corrections have been calculated for leptonic and hadronic variables in parity-violating elastic ep scattering. For the first time, the calculation of the asymmetry in the elastic radiative tail is performed without the peaking-approximation assumption in hadronic variables configuration. A comparison with the PV-A4 data validates our approach. This method has ...

We investigate effects of cluster particle correlations on two- and three-particle azimuth correlator observables sensitive to local strong parity violation. We use two-particle angular correlation measurements as inputs and estimate the magnitudes of the effects with straightforward assumptions. We found that the measurements of the azimuth correlator ...

Racemic mixtures of (+) and (?) sodium potassium tartrate, tris(1,2-ethanediamine)cobalt(III), and tris(1,2-ethanediamine)iridium(III) molecules were crystallized, and the optical activities of the resulting crystalline materials, dissolved in water, were carefully measured to study the influence of the parity-violating energy difference in the crystallization process. ...

In R-parity-violating supersymmetric models (with a conserved baryon number), there are no quantum numbers that distinguish the lepton-doublet and down-type Higgs supermultiplets. As a result, the R-parity-violating parameters depend on the basis choice for these superfields, although physical observables are independent of the choice of basis. This paper ...

A weak interaction between nucleons is induced by the quark-quark weak interaction in the Standard Model. At present the NN weak interaction is poorly constrained by experiment. We conducted an experiment to search for parity violation in the rotation of the plane of polarization of slow neutrons in liquid 4He at the Center for Neutron Research at the ...

For a test of parity conservation in compound nucleus reactions in the Ericson regime we used the reaction 27Al(p, ?0,1)24Mg at ?lab = 167.2�. The parity-violating asymmetry was determined at six bombarding energies between 10 and 12 MeV. The analysis is done with the help of the probability distribution of the P-violating reaction ...

As a test of parity conservation in compound nucleus reactions in the regime of Ericson fluctuations we use the reaction 27Al(p, ?0.1)24Mg at ?lab=167.2�. The parity-violating asymmetry was determined at six bombarding energies between 10 and 12 MeV. An upper limit of 7�10-4 at a confidence level of 80% for the average ...

Possible ways of detecting weak neutral currents in atomic physics through parity-violating effects in heavy atoms are analyzed from a theoretical point of view. (auth)

contract HPRN-CT-2002-00311 EURIDICE and by Polish�French Scientific Agreement Polonium is acknowledged

A new generation of parity violating electron scattering experiments began running in Summer 2004 at the Thomas Jefferson National Accelerator Facility. HAPPEX-H will measure the parity violating asymmetry in polarized electron scattering from protons at Q2 = 0.11 (GeV/c)2. This asymmetry is sensitive to a linear ...

We review a recent theoretical determination of the strange quark content of the electromagnetic form factors of the nucleon. These are compared with a global analysis of current experimental measurements in parity-violating electron scattering.

We review a recent theoretical determination of the strange quark content of the electromagnetic form factors of the nucleon. These are compared with a global analysis of current experimental measurements in parity-violating electron scattering.

A search for stop production in R-parity-violating supersymmetry has been performed in e+p interactions with the ZEUS detector at HERA, using an integrated luminosity of 65 pb-1. At HERA, the R-parity-violating coupling ?� allows resonant squark production, e^+dtotilde{q}. Since the lowest-mass squark state in most supersymmetry models is the light stop, ...

Dec 14, 2001... constraining Lorentz and Charge-Parity-Time (CPT) symmetry violation of the proton using a hydrogen maser double resonance technique. ...

We study a simple extension of the minimal supersymmetric standard model in which the Abelian sector of the theory consists of B-L and right-handed isospin. In the minimal model this Abelian gauge structure is broken to the standard model hypercharge gauge group by nonvanishing vacuum expectation values of the right-handed sneutrinos, resulting in spontaneous R-parity ...

The parity-violation energy difference between enantiomeric forms of the same amino acid sequence, from the amyloid ?-peptide involved in Alzheimer's desease, in both ?-helix and ?-sheet configurations, is investigated with ab-initio techniques. To this end, we develop an extension of the N2 computational scheme that selectively includes neighboring amino acids to preserve the ...

If the inflaton phi is a pseudoscalar, then it naturally interacts with gauge fields through the coupling proptophi F?? tilde F??. Through this coupling, the rolling inflaton produces quanta of the gauge field, that in their turn source the tensor components of the metric perturbations. Due to the parity-violating nature of the system, the right- and the left-handed tensor ...

TRIUMF experiment 497 has measured the parity-violating longitudinal analyzing power Az in p?p elastic scattering at 221.3 MeV incident proton energy. This comprehensive paper includes details of the corrections, some of magnitude comparable to Az itself, required to arrive at the final result. The largest correction was for the effects of first moments of transverse ...

This paper reviews the present status of our understanding of parity violation in few-nucleon systems. At low energies, nuclear parity-violating forces can be parametrized in the framework of meson-exchange potentials. The pertinent weak meson-nucleon couplings can be calculated by invoking either the quark or the soliton model of the ...

With longitudinally polarized protons at RHIC, even a 1 month dedicated run utilizing both approved major detectors could produce a significant search for new physics in hadron collisions via parity violation. Additionally, in the energy range of RHIC, large ``conventional`` parity violating effects are predicted ...

The leading contribution of O ($alpha$G/sub F/) to the parity violating piece of the electron Compton amplitude is calculated in the Weinberg Salam unified theory and is shown to vanish. The reason for this is the nonexistence of parity violating charge and electric dipole moment. In the computation, a ...

Recent experimental results indicate that the dark matter sector may have a non-minimal structure with a spectrum of states and interactions. Inelastic scattering has received particular attention in light of DAMA's annual modulation signal. Composite inelastic dark matter (CiDM) provides a dynamical origin for the mass splittings in inelastic dark matter models. We show that higher ...

It is shown that the current-current model of the weak Hamiltonian is consistent with the nonvanishing of the parity-violating nonleptonic decays KS-->?? and B-->pvB'?.

In an ingenious application of parity violation, physicists are measuring interstitial magnetic fields and diffusion in solids by analyzing the anisotropy in the decay of injected spin-polarized positive muons.

The model-space approach is the basis of both shell model and statistical spectroscopy analyses of nuclear phenomena. The goal of this session is to bring out the main theoretical issues involved in its application to parity violation in the compound nucleus. Section 1 of the current paper sets the stage for the session, and Sect. 2 introduces and explores ...

The paper discusses application of parity violating polarized electron scattering off nucleons to study strange form factors of the nucleon. The results from the recent HAPPEX experiment are discussed in more detail.

) Nafis Rahnama. Supervisor. Sexual dimorphism in locomotory performance in spiders. 2006- 2007. (6) Kuhan

We compute a full set of the first order QED corrections to the parity-violating observables in polarized Moeller scattering. We employ a covariant method of removing infrared divergences, computing corrections without introducing any unphysical parameters. When applied to the kinematics of the SLAC E158 experiment, the QED corrections reduce the parity ...

The branching ratios of the decays of the states [psi](3770) and [Upsilon](10580) into [pi][sup +][pi][sup [minus

An exact solution is given of the stationary Boltzmann equation for a gas confined in a space region of finite volume moving inside a constant force field. (LBS)

We analyze parity-violating nucleon-nucleon scattering at energies Eparity-violating NN interactions is written in an operator basis that encodes the five partial-wave transitions that dominate at these energies. We calculate the leading-order ...

We investigate the effects of the full two-loop R-parity violating ?-functions in the framework of the minimal supersymmetric standard model. We shell consider the impact of the two-loop running on the sparticle spectrum.

Minor changes to the standard supersymmetric model, such as soft flavor violation and R parity violation, cause large changes in the signatures. The origin of these changes and the resulting signatures are discussed. 15 refs., 7 figs., 2 tabs.

Violations of symmetries have been used to determine (or test) the theoretical dynamics or to study structure. Recent experiments on parity non-conservation and time reversal symmetry, and that depend on spin properties, are used to illustrate both applications.

Violations of symmetries have been used to determine (or test) the theoretical dynamics or to study structure. Recent experiments on parity non-conservation and time reversal symmetry, and that depend on spin properties, are used to illustrate both applications.

Violations of symmetries have been used to determine, or test, theoretical dynamics or to study structure. Recent experiments on parity non-conservation and time reversal symmetry, experiments that depend on spin properties, are used to illustrate both applications.

All experimental evidence for violation of discrete spacetime symmetries: Parity and Time reversal and the related Charge conjugation/Parity combination (P, T and CP, respectively) has been obtained on Earth in a gravitational potential that is P and T anisotropic. It is suggested that the origin of the observed CP ...

R-parity-violating supersymmetry with a conserved baryon number $B$ provides a framework for particle physics with lepton number ($L$) violating interactions. Two important probes of the $L$-violating physics are neutrino masses and sneutrino-antisneutrino mass-splittings. We evaluate these quantities in the context of the most general ...

In this report, the papers on symmetry violation under space reflection and time reversal and neutron spin, neutron spin rotation and P-violation, parity nonconservation in neutron capture reaction, some advantage of the search for CP-violation in neutron...

The conference began with an introductory lecture by Bunakov. It is very appropriate that this workshop be held in Dubna as Bunakov reminded us that the experiments that motivated the current interest in the study of symmetry violation with neutrons were started here at Dubna by Alfimenkov, Pikelner, and collaborators. Bunakov discussed the fact that is the complexity of the ...

Radiative corrections to the parity-violating asymmetry measured in elastic electron-proton scattering are analyzed in the framework of the Standard Model. The new method of constrained differential renormalization is used. We include the complete set of one-loop contributions to one quark current amplitudes. The contribution of soft photon emission to the asymmetry is also ...

SLC/SLD provides the ideal experimental environment to directly measure the parity violation parameters at the Zb{anti b}, Zc{anti c} vertex decays. Three different analysis techniques exploit the multi-purpose detector capabilities and are briefly described; the updated result obtained with the semileptonic decay method is presented.

The spontaneous generation of parity- (P) and time-reversal- (T) violating masses in (2+1)-dimensional QED is studied in the large-N limit, where N is the number of two-component complex fermions. Energy considerations of various symmetry-breaking patterns indicate that P and T are not spontaneously broken, even though masses which individually ...

The gamma -quanta yields for direct transitions near p-wave parity violating /sup 111/Cd and /sup 113/Cd neutron resonances for which parity violating have been obtained earlier have been measured. Investigations were carried out by the time-of-flight met...

Searches for R-parity violating supersymmetry with the D0 detector at the Fermilab Tevatron p(bar p)-collider are presented. In the case of non-zero LL(bar E) couplings (lambda)(sub ijk) (approx.)> 0.01, multi-lepton final states, and for a small coupling...

�pole come from atomic parity violation (APV) and #A scattering. In APV the most sensitive measurements come from the cesium atom [2, 3]. Unfortunately, the interpretation of APV results have been somewhat as the understanding of atomic structure has advanced. The most recent calculations of cesium APV appear to disagree

We argue that there are no charged current contributions to the parity-violating NN pi coupling except for small contributions from flavor symmetry-breaking effects. From the neutral current product only the left-right chiral component contributes; the co...

The NPD{gamma} experiment at the Los Alamos Neutron Science Center (LANSCE) is dedicated to measure with high precision the parity violating asymmetry in the {gamma} emission after capture of spin polarized cold neutrons in para-hydrogen. The measurement will determine unambiguously the weak pion-nucleon-nucleon ({pi}NN) coupling constant f{sub {pi}}{sup ...

The NPD{gamma} experiment at the Los Alamos Neutron Science Center (LANSCE) is dedicated to measure with high precision the parity violating asymmetry in the {gamma} emission after capture of spin polarized cold neutrons in para-hydrogen. The measurement will determine unambiguously the weak pion-nucleon-nucleon ({pi} NN) coupling constant (line ...

The NPD? experiment at the Los Alamos Neutron Science Center (LANSCE) is dedicated to measure with high precision the parity violating asymmetry in the ? emission after capture of spin polarized cold neutrons in para-hydrogen. The measurement will determine unambiguously the weak pion-nucleon-nucleon (?NN) coupling constant f?1.

We evaluate in closed form the parity-violating one-loop six-point function with external gauge bosons in type-I superstring theory. The amplitude is proven finite for arbitrary internal symmetry. The axial-vector anomaly is obtained for general internal symmetry and is shown to vanish in the case of SO(32).

The parity-violating one-loop functions with three and four external gauge bosons accompanied by five external massless scalars in lower-dimensional type-I string theory are evaluated in closed form. The finiteness and anomaly freedom of the amplitudes are also proved independent of the internal symmetry.

A gauge-invariant formalism is developed to describe the effect of parity-violating weak-nuclear interactions on nuclear magnetic chemical shift in molecules. Such effect is computed for two molecules with ab initio techniques and it is found to be orders of magnitude smaller than experimental resolution for the molecules considered.

Parity-violating asymmetries are calculated for elastic scattering of electrons on nuclei of arbitrary spin and isospin. Possible dependences on nuclear-model input are shown to be weak. Elastic electron scattering at intermediate energies may become an important tool in studying the structure of hadronic weak neutral currents.

Parity violations in e sup + e sup minus yields hadrons may be detectable in correlations of the form (p right vector sub 1 times r right vector sub 2). R right vector sub e between two hadrons and the electron beam. In the absence of specific guidance as...

Measurements have been performed on the helicity dependence of the neutron resonance cross section for many nuclei by our TRIPLE Collaboration. A large number of parity violations are observed. Generic enhancements amplify the signal for symmetry breaking and the stochastic properties of the compound nucleus permit the strength of the symmetry-breaking ...

A diquark-quark scattering model for the parity-violating asymmetry in nucleon-nucleon scattering is described. Criticism of the model by Simonius and Unger is refuted. The strong energy dependence of the result, and the possibility of important non-valence contributions to the nucleon polarization, both support the need for further measurements at Fermilab and at Brookhaven ...

A parity violating effect of interest in the n + p $Yields$ d + $gamma$ reaction is the asymmetry $alpha$ in the photon angular distribution with respect to an initial neutron polarization. Calculations of $alpha$, using a two-nucleon Reid soft core potential, are reported. The calculations, exact with respect to the strong interaction, are ...

We discuss some interesting physics goals for measurements of parity violation in deep inelastic scattering with the proposed new 11 GeV polarized electron beam at JLab. Topics discussed include higher twist effects, charge symmetry violation, and the ratio d/u of up quarks to down quarks in the proton structure functions. In addition, ...

We have carried out a precision of the parity-violating asymmetry APV in the scattering of longitudinally polarized electrons off electrons in a liquid hydrogen target. The measurement was performed with the 50 GeV beam line at SLAC. The final result with the full data set collected in three production runs is APV = - 131 +/- 14 (stat) +/- 10 (syst) parts per billion. The ...

We discuss the status and prospects of an experimental program of parity-violating asymmetry measurements in the scattering of longitudinally polarized electrons off unpolarized electrons and nucleons. In particular, we focus on those measurements where judicious choices of target and kinematics makes the theoretical predictions dependent purely on fundamental electroweak ...

Parity violation (PV) in the interaction is considered as due to the Weinberg-Salam quark-quark interaction inside the six-quark bag. The initial and final strong interaction is described within the same quark compound bag (QCB) model, where the NN coupli...

We suggest to start an accelerator physics project called the Mainz Energy recovering Superconducting Accelerator (MESA) as an extension to our experimental facilities. MESA may allow to introduce an innovative internal target regime based on the ERL principle. A second mode of operation will be to use an external polarized electron beam for parity ...

Previous theoretical work has been unable to predict a reliable value for the nuclear parity-violation parameter h/sup() 1prime//sub rho/. Using a 1/2/sup -/ pole model we estimate the size of this term and demonstrate that it is very unlikely to have a significant effect on theoretical calculations.

The parity-violating longitudinal asymmetry of the neutron scattering cross section has been measured for thorium in the off-resonance energy intervals from 30 to 300 eV. The observed result of (0.5{+-}1.6)x10{sup -6} is compared with theoretical predictions. (c) 2000 The American Physical Society.

We present direct measurements of the parity-violation parameters A(sub beta), A( sub c), and A(sub s) at the Z(sup 0) resonance with the SLD detector. The measurements are based on approximately 530k hadronic Z(sup 0) events collected in 1993-98.

This paper uses results on the integrable Chiral Potts chains, the t-J model and the bilinear-biquadratic spin-1 model to discuss the level crossing-spontaneous parity violating mechanism for high T{sub c} superconductivity.

From recent developments in the area of nuclear parity violation we extract evidence for (1) SU(3) soft pion breaking in weak pionic vertices, and (2) larger values of quark masses than have been used in previous evaluations of ''penguin'' matrix elements.

We present results for two-body observables that are sensitive to the parity-violating component of nucleon-nucleon interactions. These interactions are studied using an effective field theory in which the only dynamic degrees of freedom are nucleon fields. The observables we study are cross-section asymmetries in nucleon-nucleon scattering and asymmetries and induced ...

Further measurements of parity-violating asymmetries in inelastic scattering of polarized electrons from deuterium were made for a range of y values from 0.15 to 0.36. Only a small y-dependemce was observed in the asymmetries. Using the quark-parton model...

The (2+1)-dimensional theory with a four-fermion interaction of a general type was investigated. The conditions obtained specify the possibility for the dynamic generation of the Chern-Simons (CS) term. It was shown that a spontaneous P-parity violation does not always result in the generation of CS terms; there is vacuum in which both the chiral ...

Parity violation in nuclear systems was studied by forward-backward asymmetry measurement methods in radiative capture of polarized neutrons in the reactions exp 117 Sn(n, gamma ) exp 118 Sn and exp 35 Cl(n, gamma ) exp 36 Cl. The experimental set ups use...

R-parity violation and extensions of the Standard Model gauge structure offer two non-minimal realizations of supersymmetry at low energies that can lead to similar new physics signatures at existing and future colliders. We discuss techniques that can be employed at the NLC below direct production threshold to distinguish these two new physics scenarios.

Calculations are presented of the E1 amplitude expected in forbidden M1 transitions of Tl and Cs if parity is violated in the neutral weak e-N interaction, as proposed in a number of gauge models, including that of Weinberg and Salam. Valence electron wav...

The atomic parity-violation (APV) parameter QW for a nucleus with n neutrons and z protons has been included in the list of pseudo-observables accessible with the codes TOPAZ0 and ZFITTER. In this way one can add the APV results in the LEP EWWG �global� electroweak fits, checking the corresponding effect when added to the existing precision measurements.

, Italy Abstract The atomic parity�violation (APV) parameter QW for a nucleus with n neutrons and z pro. In this way one can add the APV results in the LEP EWWG `global' electroweak fits, checking the corresponding�parity violation (hereafter APV) parameters in the list of pseudo�observables (hereafter PO) that are accessible

-energy experiment on atomic parity violation (APV) [7, 8]. 1 The SUSY partners of the left- and right-handed top) are also reported. The dotted line is the indirect constraint from atomic parity violation (APV) [7, 8 l` 131 =10 �3 (a) Excluded by D0 Excluded by ZEUS MSSM: 100 APV

produces an experimentally observable parity-violating asymmetry APV in the scattering of longitudinally po electromagnetic amplitudes, it is straightforward to update the formula for the parity-violating asymmetry APV which properly includes the two-photon box contri- butions. The asymmetry takes the form, APV = GF Q 2 4