SIGNATURES OF SPONTANEOUS BREAKING OF R-PARITY IN GLUINO CASCADE DECAYS AT LHC

We study the pattern of gluino cascade decays in a class of supersymme tric models where R-parity is spontaneously broken. We give a detailed discussion of the R-parity violating decays of the lightest neutralin o, the second lightest neutralino and the lightest chargino. The multi -lepton and same-sign dilepton signal rates expected in these models a re compared with those predicted in the Minimal Supersymmetric Standar d Model. We show that these rates can be substantially enhanced in bro ken R-parity models. (C) 1997 Elsevier Science B.V.