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preprints:1995:ttp95-48 [2016/03/17 11:03] (current)
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 +====== 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 
 + </​hidden>​ 
 +|**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]] ​  | 
 +| |