Threshold Top Quark Production in $e^+e^-$ Annihilation: Rescattering Corrections

Abstract

Top quark pair production close to threshold at a next linear collider is discussed, with special focus on the influence of rescattering corrections. Numerical results are shown for the differential cross-section, i.e. the momentum distribution and the forward backward asymmetry, and for moments of the angular distribution of leptons arising from the semileptonic top quark decay.

17 pages LaTeX, 8 figures. Talk presented at the XXXVI Cracow School of Theoretical Physics, Zakopane, June 1-10. The complete paper, including figures, is also available via anonymous ftp at ftp://www-ttp.physik.uni-karlsruhe.de/ , or via www at http://www-ttp.physik.uni-karlsruhe.de/cgi-bin/preprints/