IMPLICATIONS OF GENERALIZED Z-Z' MIXING

We discuss experimental implications of extending the gauge structure of the standard model to include an additional U(1) interaction broken at or near the weak scale. We work with the most general, renormaliza ble Lagrangian for the SU(2)x U(1)x U(1) sector, with emphasis on the phenomenon of gauge kinetic mixing between the two U(1) gauge fields, and do not restrict ourselves to any of the ''canonical'' Z' models of ten discussed in the literature. Low-energy processes and Z(0)-pole pr ecision measurements an specifically addressed.