Implications of $\Delta\rho$ and charm II data for Z' physics

Özet

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.