Signatures of spontaneous breaking of R-parity in gluino cascade decays at LHC

Abstract We study the pattern of gluino cascade decays in a class of supersymmetric models where R -parity is spontaneously broken. We give a detailed discussion of the R -parity violating decays of the lightest neutralino, the second lightest neutralino and the lightest chargino. The multi-lepton and same-sign dilepton signal rates expected in these models are compared with those predicted in the Minimal Supersymmetric Standard Model. We show that these rates can be substantially enhanced in broken R-parity models.