SIMPLE AND PREDICTIVE MODEL FOR QUARK AND LEPTON MASSES

A model is proposed which predicts that mt is large, that one family (e, u, and d) has only radiatively generated and hence small masses, and that at the unification scale m 0mb0 but m0 ms0 and me0 md0. An essential feature of the model is a close connection between the pattern of breaking of unified gauge symmetry at large scales and the pattern of fermion masses at low scales, which gives a group-theoretical understanding of many features of the quark and lepton masses. © 1990 The American Physical Society.