====== TTP95-48 Top Quark Polarization in Polarized <EM>e+e-</EM> Annihilation near Threshold ======
 
 
   <hidden TTP95-48  Top Quark Polarization in Polarized <EM>e+e-</EM> Annihilation near Threshold > Top quark polarization in $e^+e^-$ annihilation into $t\bar t$
 is calculated for linearly polarized beams.
 The Green function formalism is applied
 to this reaction near threshold.
 The Lippmann--Schwinger equations for the $S$-wave and
 $P$-wave Green functions are solved numerically for the
 QCD chromostatic potential given by the two-loop formula
 for large momentum transfer and Richardson's ansatz
 for intermediate and small momenta.
 $S$-$P$--wave interference contributes to all
 components of the top quark polarization vector. Rescattering of
 the decay products is considered.
 The mean values $\langle n \ell \rangle$
 of the charged lepton four-momentum projections on appropriately chosen 
 directions $n$ in semileptonic top decays are proposed as experimentally
 observable quantities sensitive
 to top quark polarization.
 The results for $\langle n \ell \rangle$ are obtained
 including $S$-$P$--wave interference and rescattering of the decay
 products.
 It is demonstrated that for the longitudinally polarized
 electron beam a highly polarized sample of top quarks can
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|**R. Harlander, M. Jezabek, J.H. Kuehn and M. Peter**  | 
|** Z. Phys. C 73 477-494 1997  **  |
| {{preprints:1995:ttp95-48.pdf|PDF}} {{preprints:1995:ttp95-48.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9604328|arXiv]]   |
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