Fig. i. The amplitude for e-hadron scattering consists of an electromagnetic piece, shown as a single virtual photon exchange, and a weak neutral current piece. The characteristic strengths are a/Q2 and G, respecti.Jely. Under parity, the wea!k term contains parts which cknge sqp, lsading to weak-electr>)mag*e;iL: interference effects in the cross eection for scatirering of polarized electrons....

The lepton or baryon number violating top quark interactions in the supersymmetric standard model with R parity violation contribute to the process dd̄ → tt̄ at the tree level via the tor u-channel sfermion exchange. Since these interactions are chiral, they induce polarization to the top quark in the tt̄ events at hadron colliders. We show in this article that the polarization can be a useful obs...

The photon is one of the fundamental gauge bosons of the Standard Model without selfcouplings and without intrinsic structure. However, at high energies photon-hadron and photon-photon interactions are dominated by quantum fluctuations of the photons into fermion-antifermion pairs and into vector mesons which have the same spin-parity (JPC = 1) as the photon. This is called photon structure. El...

We present an improved direct measurement of the parity-violation parameter Ab in the Z boson–b quark coupling using a self-calibrating track-charge technique applied to a sample enriched in Z → bb̄ events via the topological reconstruction of the B hadron mass. Manipulation of the SLC electron-beam polarization permits the measurement of Ab to be made independently of other Z-pole coupling para...

We investigate the mass spectra of Θ(ududs̄) in quenched lattice QCD, with overlap and Wilson fermions respectively. Using three different interpolating operators, we measure their correlation matrix, and extract the mass spectra in even and odd parity channels, for 100 gauge configurations generated with single plaquette action at β = 6.1 on the 203 × 40 lattice. The lowest 1/2− state agrees wi...

The discovery of the electroweak theory crowned long years of investigation on weak interactions. The key earlier developments included Fermi’s phenomenological four-fermion interactions for the beta decay, discovery of parity violation and establishment of V − A structure of the weak currents, the Feynman-Gell-Mann CVC (conserved vector current) hypothesis, current algebra and its beautiful ap...

The lepton or baryon number violating top quark interactions in the supersymmetric standard model with R parity violation contribute to the process dd̄ → tt̄ at the tree level via the tor u-channel sfermion exchange. Since these interactions are chiral, they induce polarization to the top quark in the tt̄ events at hadron colliders. We show in this article that the polarization can be a useful obs...

We present selected new results on strong interaction physics from the SLD experiment at the SLAC Linear Collider (SLC), symmetry tests of bb̄g vertex, the rate of secondary bb̄ production via gluon splitting, the B hadron energy spectrum and rapidity correlations between identified charged hadrons. The parity violation in Z → bb̄g decays is consistent with electroweak theory plus QCD. New tests o...

We present selected new results on strong interaction physics from the SLD experiment at the SLAC Linear Collider (SLC), symmetry tests of b bg vertex, the rate of secondary b b production via gluon splitting, the B hadron energy spectrum and rapidity correlations between identi ed charged hadrons. The parity violation in Z ! b bg decays is consistent with electroweak theory plus QCD. New tests...

The resonant production of sneutrinos at the LHC via the R-parity violating couplings λ′ijkLiQjD c k is studied through its three-leptons signature. A detailed particle level study of signal and background is performed using a fast simulation of the ATLAS detector. Through the full reconstruction of the cascade decay, a model-independent and precise measurement of the masses of the involved spa...