Polarization effects in e+e-to W+W$

Abstract

We investigate longitudinal and transverse beam polarization in e+e_ —* W +W~ including electroweak radiative corrections and hard bremsstrahlung. Also final state polarizations are discussed. We show that the transverse beam polarization allows to study the most interesting longitudinal-longitudinal final state polarization without looking at the polarization of the final state particles. However, to detect possible small deviations from the standard model a high luminosity e+e“ -collider, with energy scan from the peak of the cross-section up to about 300 GeV, is necessary.