Implications of $Deltarho$ and charm II data for Z' physics

Abstract

We discuss the constraints on the $Z^{prime}$ model parameters coming from Z-pole and low-energy $nu_mu-e$ scattering data in the frame work of GUT-motivated models. We find that when the coupling constant of the extra U(1) is small (large) the parameter space is mainly determined by the Z-pole (the low-energy $nu_mu-e$ scattering) data.