Search for bosonic stop decays in R-parity violating supersymmetry in e^+ p collisions at HERA
arXiv:hep-ex/0405070 · doi:10.1016/j.physletb.2004.08.032
Abstract
A search for scalar top quarks in R-parity violating supersymmetry is performed in e^+ p collisions at HERA using the H1 detector. The data, taken at sqrt{s}=319 GeV and 301 GeV, correspond to an integrated luminosity of 106 pb^-1. The resonant production of scalar top quarks \tilde{t} in positron quark fusion via an R-parity violating Yukawa coupling lambda' is considered with the subsequent bosonic stop decay \tilde{t} -> \tilde{b} W. The R-parity violating decay of the sbottom quark tilde{b} -> d \bar{nu_e} and leptonic and hadronic W decays are considered. No evidence for stop production is found in the search for bosonic stop decays nor in a search for the direct R-parity violating decay \tilde{t} -> eq. Mass dependent limits on lambda' are obtained in the framework of the Minimal Supersymmetric Standard Model. Stop quarks with masses up to 275 GeV can be excluded at the 95% confidence level for a Yukawa coupling of electromagnetic strength.
20 pages, 5 figures and 2 tables
References in corpus (5)
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- Hadronic production of top-squark pairs with electroweak NLO contributions
- Searches for Supersymmetry at High-Energy Colliders
- Events with Isolated Leptons and Missing Transverse Momentum and Measurement of W Production at HERA
- Search for stop production in R-parity-violating supersymmetry at HERA
- Search for Light Gravitinos in Events with Photons and Missing Transverse Momentum at HERA
- Isolated Lepton Events at HERA: SUSY R-Parity Violation?