SEARCH FOR HEAVY CHARGED LEPTONS AT HADRON COLLIDERS

Four models are considered which contain heavy leptons beyond the thre e families of the standard model. Two are fourth-generation extensions of the standard model in which the right-handed heavy leptons are eit her isosinglets or in an isodoublet; the other two are motivated by th e aspon model of CP violation. In all these models, the heavy neutrino can either be heavier than, or comparable in mass to, the charged lep ton leading to the possibility that the charged lepton is very, long l ived. Production cross section and signatures for such leptons are com puted for the SSC and CERN LHC.