Unextended Hypercolor and Unification

Abstract

Phenomenologically acceptable quark and lepton masses result if the known light fermions are coupled to heavy fermions and bosons (mass order ${10}^{15}$ GeV) with SU(2) ⊗ U(1)- breaking mass mixing of order 100 GeV. It is argued that adequate mixing may be obtained in a hypercolor theory which has a nontrivial fixed point. This is illustrated in a toy model based on SU(5) ⊗ SU(2).