Search For Supersymmetric Particles With Dominant R- Parity Violating Lle Couplings In Electron-positron Collisions At 189--206 Gev

A search for pair productions of gauginos and sleptons, under the assumption that R-parity conservation is violated via dominant λ couplings, has been performed using data collected at center-of-mass energy of 189–206 GeV with the OPAL detector at LEP. The number of observed candidate events is in agreement with the Standard Model expectation. Upper limits on masses of particles are derived and values of supersymmetric parameters are constrained.