Searches for R-parity violating decays of Gauginos at 183 GeV at LEP

Searches for pair-produced charginos and neutralinos with R-parity violatingdecays have been performed using a data sample corresponding to an integratedluminosity of 56 pb-1 collected with the OPAL detector at LEP at acentre-of-mass energy of 183 GeV. An important consequence of R-parityviolation is that the lightest supersymmetric particle becomes unstable. Thesearches have been performed under the assumptions that the lightestsupersymmetric particle promptly decays and that only one R-parity violatingcoupling is dominant for each of the decay modes considered. Such processeswould yield multiple leptons, leptons plus jets, or multiple jets with orwithout significant missing energy in the final state. No excess of such eventsabove Standard Model backgrounds has been observed. Limits are presented on theproduction cross-sections of gauginos in R-parity violating scenarios. Limitsare also presented in the framework of the Minimal Supersymmetric StandardModel.Comment: 57 pages, LaTeX, 25 eps figures included, submitted to European Physical Journal