The cross-sections for both elastic longitudinal W + W − scattering (W

by the DØ experiment in Run II of the upgraded Fermilab Tevatron Collider at a center of mass energy of √ s = 1.96 TeV have been used to search for evidence of supersymmetry in eµ + final states accompanied by missing transverse energy. In supersymmetry models, such topologies are expected to contain contributions from associated chargino and neutralino production. Data corresponding to an inte...

We examine the role of neutron capture on Sn during r-process freezeout in the neutrino-driven wind environment of the core-collapse supernova. We find that the global r-process abundance pattern is sensitive to the magnitude of the neutron capture cross section of Sn. The changes to the abundance pattern include not only a relative decrease in the abundance of Sn and an increase in the abundan...

The measurement of the beauty quark production cross section in deep inelastic scattering with the ZEUS detector at HERA is presented. The cross section for beauty quarks, measured in the kinematic range Q > 2 GeV and 0.05 < y < 0.7, and for events with at least one muon and one jet in the Breit frame, is somewhat above the next-to-leading order (NLO) QCD prediction, but in agreement within the...

We present a study of the reaction e+e−→π+π−π0 at the φ peak, W = M(φ) =1019.4 MeV, observed with the KLOE detector at DAΦNE. The reaction is dominated by φ production and decay, e+e−→φ→π+π−π0. From a fit to the Dalitz plot density distribution we obtain the ρ-meson parameters for its three charge states. We also find the relative amplitudes for φ→ρπ and φ→π+π−π0 and the cross section for e+e− ...

Drees and Godbole have proposed that, at the interaction point of an e+e− linear collider, one expects a high rate of hadron production by γγ collisions, providing an additional background to studies in e+e− annihilation. Using a simplified model of the γγ cross section with soft and jet-like components, we estimate the expected rate of these hadronic events for a variety of realistic machine d...

The propagator in the instanton background in the (−λφ4) scalar model in four dimensions is studied. Leading and sub-leading terms of its asymptotics for large momenta and its on-shell double residue are calculated analytically. These results are applied to the analysis of the initial-state and initial-final-state corrections and the calculation of the next-to-leading (propagator) correction to...

Deeply virtual Compton scattering has recently been studied by three HERA experiments, H1, ZEUS and HERMES, covering a broad range of kinematic regimes. We present cross section measurements of the two collider experiments in the kinematic region 2<Q<100 GeV and 30<W<140 GeV, and compare them to QCDbased calculations. HERMES measurements of azimuthal asymmetries and their kinematical dependence...

We present a study of the reaction e+e−→π+π−π0 at the φ peak, W = M(φ) =1019.4 MeV, observed with the KLOE detector at DAΦNE. The reaction is dominated by φ production and decay, e+e−→φ→π+π−π0. From a fit to the Dalitz plot density distribution we obtain the ρ-meson parameters for its three charge states. We also find the relative amplitudes for φ→ρπ and φ→π+π−π0 and the cross section for e+e− ...