Polarization effects on W boson pair production with an extra neutral gauge boson at the e+e- linear collider

We perform a comprehensive analysis of the polarization effects on the e(+)e(-) --> W+W- process in the presence of an extra neutral gauge boson at the future e(+)e(-) linear collider energies. The sensitivity for probing the Z-Z' mixing is substantially enhanced when the polarizations of the produced W bosons and the incident beams are considered. We find that the chi-model and the left-right model get stricter constraints from the cross section for both longitudinally polarized W bosons while the psi-model and the eta-model get stricter bounds from the beam polarization asymmetry.