POSSIBLE SNEUTRINO-PAIR SIGNATURES WITH R-PARITY BREAKING

If sneutrinos are the lightest supersymmetry partners and R-parity is not conserved, the process e(+)e(-) --> <v(v)over tilde> can have striking signatures due to the decay modes (v) over tilde --> l(+)l'(-) or (v) over tilde --> <q(q)over bar'>. We present cross section formulas and discuss event rates and detection at the upgraded e(+)e(-) collider LEP. Four-lepton signals should be detectable up to sneutrino mass <(m)over tilde(v)> = 80 GeV and maybe beyond; four-jet signals should be detectable up to <(m)over tilde(v)> = 70 GeV, but would probably be obscured thereafter by WW background.