Lepton mass generation and family number violation mechanism in the SU(6)(L)circle times U(1)(Y) model

Lepton family number violation processes arise in the SU(6)(L) x U(1)(Y) mo del due to the presence of an extra neutral gauge boson, Z', with family ch anging couplings, and due to the fact that this model demands the existence of heavy exotic leptons. The mixing of the standard Z with Z' and the mixi ng of ordinary leptons with exotic ones induce together family changing cou plings on the Z and therefore nonvanishing rates for lepton family number v iolation processes, such as Z --> e<(mu)over bar>, mu --> ee(e) over bar an d mu --> e gamma. Additional contributions to the processes mu --> e gamma and mu --> ee(e) over bar are induced from the mass generation mechanism. T his last type of contributions may compete with the above one, depending on the masses of the scalars which participate in the diagrams which generate radiatively the masses of the charged leptons. Using the experimental data we compute some bounds for the mixings parameters and for the masses of th e scalars.