SEARCHES FOR AND SEPARATION OF EFFECTS OF LEPTON AND BOSON MIXING AT LINEAR E(-) COLLIDERS()E()

Within models involving an extended gauge sector, a method is proposed for separating signals induced by new neutral gauge bosons and exotic leptons in electron-positron annihilation into a Fair of W+/- bosons. This method is based on use of polarization observables for various v ersions of initial and final polarization states. It is shown that, in the case of specified final polarization states, experiments with lon gitudinally polarized e(+)e(-) beams at next-generation colliders will make it possible not only to obtain constraints on individual paramet ers of mixing of ordinary and exotic leptons, as well as on the angle of Z-Z' mixing, but also to toughen considerably the constraints that are expected from the corresponding experiments with unpolarized parti cles.