Natural Gauge Model Allowing All Weak Bosons above the StandardWandZ

Abstract

We construct a natural SU(2) ⊗ U(1) ⊗ [SU(2)]′ gauge model in which the lightest weak bosons can be heavier than those of the standard model. At energies below the $Z$ boson, the model could be distinguished from the standard model by precision measurements of $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}$.