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In the framework of gauge-mediated supersymmetry breaking models pairproduction of the lightest neutralinos, scalar leptons, or charginos at LEPIIgives rise to interesting signals involving multilepton final states andmissing energy. In the parameter space where the scalar tau, $\tilde{\tau}_1$,is the next-to-lightest supersymmetric particle, we identify three interestingregions, which give rise to distinctly different final states: (i) 2$\tau$-leptons plus missing energy, (ii) 4 charged leptons plus missing energywhere in some regions all four are $\tau$-leptons, or (iii) six chargedleptons, of which four are $\tau$-leptons and the other two are electrons ormuons, plus missing energy. We study in detail the size of these regions in theparameter space of gauge-mediated models and give cross section contours inthese regions for various LEPII energies. We also discuss the possibility ofchargino-pair production at LEPII.Comment: Description of three-body decay of selectron and smuon is added and  other minor changes. Published version in PR

Multilepton signatures of gauge mediated SUSY breaking at CERN LEP II