KIP-Veröffentlichungen

A search for squarks in R-parity violating supersymmetry is performed in e+-p collisions at HERA
using the H1 detector. The full data sample taken at a centre-of-mass energy √s = 319 GeV
is used for the analysis, corresponding to an integrated luminosity of 438 pb-1. The resonant
production of squarks via a Yukawa coupling λ’ is considered, taking into account direct and
indirect R-parity violating decay modes. No evidence for squark production is found in the
(multi-)lepton and (multi-)jet final state topologies investigated. Mass dependent limits on λ’ are
obtained in the framework of the Minimal Supersymmetric Standard Model and in the minimal
Supergravity Model. In the considered part of the parameter space, for a Yukawa-type coupling of
electromagnetic strength λ’ = 0.3, squarks of all flavours are excluded up to masses of 275 GeV
at 95% confidence level, with down-type squarks further excluded up to masses of 290 GeV.