Polarization in Top Quark Production and Decay near Threshold
Abstract
Theoretical results are presented for top quarks produced in annihilation of polarized electrons on positrons. Polarization studies for pairs near threshold are free from hadronization ambiguities. This is due to the short lifetime of the top quark. Semileptonic decays are discussed as well as their applications in studying polarization dependent processes involving top quarks. The Green function formalism is applied to production at future colliders with polarized beams. Lippmann--Schwinger equation is solved numerically for the QCD chromostatic potential given by the two-loop formula at large momentum transfers and Richardson ansatz at intermediate and small ones. The polarization dependent momentum distributions of top quarks and their decay products are calculated.
Cite
@article{arxiv.hep-ph/9411371,
title = {Polarization in Top Quark Production and Decay near Threshold},
author = {R. Harlander and M. Jeżabek and J. H. Kühn and T. Teubner},
journal= {arXiv preprint arXiv:hep-ph/9411371},
year = {2009}
}
Comments
6 pages, LaTex (uses epsf.sty, 2 figures appended as uuencoded ps files). The complete paper, including figures, is also available via anonymous ftp at ttpux2.physik.uni-karlsruhe.de (129.13.102.139) as /ttp94-24/ttp94-24.ps, or via www at http://ttpux2.physik.uni-karlsruhe.de/preprints.html/