SUPERSYMMETRY WITH R-PARITY BREAKING - CONTACT INTERACTIONS AND RESONANCE FORMATION IN LEPTONIC PROCESSES AT LEP2

In supersymmetric theories with R-parity breaking, trilinear couplings of two leptons to scalar sleptons are possible. In electron-positron collisions such interactions would manifest themselves through contact terms in Bhabha scattering, e(+)e(-) --> e(+)e(-), and in the annihil ation to lepton pairs, e(+)e(-) --> mu(+)mu(-) and tau(+)tau(-). Inter preting the high x, high Q(2) DIS HERA events as charm squark producti on with squark masses of order 200 GeV, the formation of tau-sneutrino s, e(+)e(-) --> <(nu)over tilde (tau)>, with a mass in the range close to LEP2 energy or even within the reach of this machine, is an exciti ng speculation which can be investigated in the coming LEP2 runs with energies close to root s = 200 GeV. (C) 1997 Elsevier Science B.V.