Polarized Top Quarks

Abstract

Recent calculations are presented of top quark polarization in $t\bar t$ pair production close to threshold. S-P-wave interference gives contributions to all components of the top quark polarization vector. Rescattering of the decay products is considered. Moments of the fourmomentum of the charged lepton in semileptonic top decays are calculated and shown to be very sensitive to the top quark polarization.

Latex, 12 pages, 4 ps-figures added in a separate file. Invited talk presented at the Workshop on Physics and Experiments with Linear Colliders, September 8-12, 1995, Morioka-Appi, Iwate, Japan, to appear in the proceedings