Gauge Model of Generation Nonuniversality

Abstract

An electroweak gauge model is discussed, where generations are associated with separate gauge groups with different couplings. The observed $\mu -e$ universality is the result of a mass-scale inequality, ${\nu }_{03}\ll {\nu }_{12}$, in much the same way as strong isospin is the result of $m_u$, $m_d\ll 1$ GeV. However, in contrast to the standard model, it is now possible to have (1) a longer $\tau$ lifetime, (2) an observable $B^0-{\overline{B}}^0$ mixing, and (3) many gauge bosons $W_i$,$Z_i$ in place of $W$,$Z$ with $M_{W_i}>M_W$ and $M_{Z_i}>M_Z$.