# Search for bosonic stop decays in R-parity violating supersymmetry in $e^+p$ collisions at HERA

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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00023184
Contributor : Sabine Starita <>
Submitted on : Friday, October 8, 2004 - 9:50:03 AM
Last modification on : Wednesday, April 7, 2021 - 3:26:01 PM

### Citation

A. Aktas, V. Andreev, T. Anthonis, A. Asmone, A. Babaev, et al.. Search for bosonic stop decays in R-parity violating supersymmetry in $e^+p$ collisions at HERA. Physics Letters B, Elsevier, 2004, 599, pp.159-172. ⟨in2p3-00023184⟩

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