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

Searches for pair-produced charginos and neutralinos with R-parity violatin g decays have been performed using a data sample corresponding to an integr ated luminosity of 56 pb(-1) collected with the OPAL detector at LEP at a c entre-of-mass energy of root s = 183 GeV. An important consequence of R-par ity violation is that the lightest supersymmetric particle becomes unstable . The searches have been performed under the assumptions that the lightest supersymmetric particle promptly decays and that only one R-parity violatin g coupling is dominant for each of the decay modes considered. Such process es would yield multiple leptons, jets plus leptons, or multiple jets with o r without significant missing energy in the final state. No excess of such events above Standard Model backgrounds has been observed. Limits are prese nted on the production cross-sections of gauginos in R-parity violating sce narios. Limits are also presented in the framework of the Minimal Supersymm etric Standard Model.