R-parity violation and uses of the rare decay sneutrino-->gamma+gamma in hadron and photon colliders

摘要

We consider implications of the loop process sneutrino -> gamma gamma in theMSSM with R-parity violation for future experiments, where the sneutrino isproduced as the only supersymmetric particle. We present a scenario for theR-parity violating couplings, where this clean decay, although rare withBr(sneutrino -> gamma gamma) ~ 10^{-6}, may be useful for sneutrino detectionover a range of sneutrino masses at the LHC. Furthermore, the newsneutrino-gamma-gamma effective coupling may induce detectable sneutrinoresonant production in gamma gamma collisions, over a considerably wide massrange. We compare sneutrino -> gamma gamma, gg throughout the paper with theanalogous yet quantitatively very different, Higgs -> gamma gamma, gg decaysand comment on the loop processes sneutrino -> WW, ZZ.