R-parity violation and uses of the rare decay (nu)over-tilde ->gamma gammain hadron and photon colliders - art. no. 035010.

We consider implications of the loop process <(nu)over tilde>-->gamma gamma in the minimal supersymmetric standard model with R-parity violation (R-p) for future experiments, where the sneutrino is produced as the only supers ymmetric particle. We present a scenario for the R-p couplings, where this clean decay, although rare with Br(<(nu)over tilde>-->gamma gamma) similar to 10(-6), may be useful for sneutrino detection over a range of sneutrino masses at the CERN Large Hadron Collider. Furthermore, the new <(nu)over ti lde>gamma gamma effective coupling may induce detectable sneutrino resonant production in gamma gamma collisions, over a considerably wide mass range. We compare <(nu)over tilde>-->gamma gamma, gg throughout the paper with th e analogous yet quantitatively very different, Higgs boson -->gamma gamma, gg decays and comment on the loop processes <(nu)over tilde>--> WW, ZZ. [S0 556-2821(99)06701-6].