Search for Bs->mu+mu- and Bd->mu+mu- Decays in ppbar Collisions at sqrt(s)=1.96 TeV
ArXiv hep-ex/0403032 (2004)
Bose-Einstein correlations in one and two dimensions in deep inelastic scattering
Physics Letters Section B Nuclear Elementary Particle and High Energy Physics 583:3-4 (2004) 231-246
Abstract:
Bose-Einstein correlations in one and two dimensions have been studied in deep inelastic ep scattering events measured with the ZEUS detector at HERA using an integrated luminosity of 121 pb-1. The correlations are independent of the virtuality of the exchanged photon, Q2, in the range 0.1 < Q2 < 8000 GeV2. There is no significant difference between the correlations in the current and target regions of the Breit frame for Q2 > 100 GeV2. The two-dimensional shape of the particle-production source was investigated, and a significant difference between the transverse and the longitudinal dimensions of the source is observed. This difference also shows no Q2 dependence. The results demonstrate that Bose-Einstein interference, and hence the size of the particle-production source, is insensitive to the hard subprocess. © 2004 Published by Elsevier B.V.Cresst-II: dark matter search with scintillating absorbers
NUCL INSTRUM METH A 520:1-3 (2004) 108-111
Abstract:
In the CRESST-II experiment, scintillating CaWO4 crystals are used as absorbers for direct weakly interacting massive particles (WIMP) detection. Nuclear recoils can be discriminated against electron recoils by measuring phonons and scintillation light simultaneously. The absorber crystal and the silicon light detector are read out by tungsten superconducting phase transition thermometers. Results on the sensitivity of the phonon and the light channel, radiopurity, the scintillation properties of CaWO4, and on the WIMP sensitivity are presented. (C) 2003 Elsevier B.V. All rights reserved.Isolated tau leptons in events with large missing transverse momentum at HERA
Physics Letters Section B Nuclear Elementary Particle and High Energy Physics 583:1-2 (2004) 41-58
Abstract:
A search for events containing isolated tau leptons and large missing transverse momentum, not originating from the tau decay, has been performed with the ZEUS detector at the electron-proton collider HERA, using 130 pb -1 of integrated luminosity. A search was made for isolated tracks coming from hadronic tau decays. Observables based on the internal jet structure were exploited to discriminate between tau decays and quark- or gluon-induced jets. Three tau candidates were found, while 0.40Optimized search for single-top-quark production at the Fermilab Tevatron
Physical Review D American Physical Society (APS) 69:5 (2004) 052003