OFF-SHELL Z(0) PAIR PRODUCTION IN E(-) ANNIHILATION()E()

A study of the standard model reaction e(+)e(-) --> (Z(0)Z(0)) --> f(1 ) $($) over bar$$ f(1)f(2) $$($) over bar f(2) including the effects o f the finite Z(0) width and initial state radiative corrections is pre sented. All angular phase space integrations are performed analyticall y. The remaining invariant masses are integrated numerically. Semianal ytical and numerical results in the energy range root s = 200 GeV to 1 TeV are reported. The generalization of the analytical method to incl ude photon exchange and also models with more neutral gauge bosom is o utlined.