Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1999-04-14
Eur.Phys.J.C12:1-24,2000
Physics
High Energy Physics
High Energy Physics - Experiment
50 pages, LaTeX, including 22 eps figures, submitted to European Physical Journal C
Scientific paper
10.1007/s100529900226
A search for pair produced scalar fermions with couplings that violate R-parity has been performed using a data sample corresponding to an integrated luminosity of 56 pb-1 at a centre-of-mass energy of sqrt{s}= 183 GeV collected with the OPAL detector at LEP. An important consequence of R-parity breaking interactions is that the lightest supersymmetric particle is expected to be unstable. Searches for R-parity violating decays of charged sleptons, sneutrinos and stop quarks have been performed under the assumptions that the lightest supersymmetric particle decays promptly and that only one of the R-parity violating couplings is dominant for each of the decay modes considered. Such processes would yield multi-leptons, jets plus leptons or multi-jets, with or without missing energy, in the final state. No significant excess of such events has been observed. Limits on the production cross-sections of scalar fermions in R-parity violating scenarios are obtained. Mass exclusion regions are also presented in the framework of the Constrained Minimal Supersymmetric Standard Model.
et al Abbiendi G.
The OPAL Collaboration
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