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