Top quark longitudinal polarization near the threshold in l+ l- annihilation

Details Top quark longitudinal polarization near the threshold in l+ l- annihilation Top quark longitudinal polarization near the threshold in l+ l- annihilation

1998-02-03

arxiv.org/abs/hep-ph/9802234v2

Mod.Phys.Lett. A13 (1998) 973-978

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, LaTeX, no figures, added references, corrected typos

Scientific paper

10.1142/S0217732398001042

We show that the longitudinal polarization of the top quarks produced in the annihilation of e+ e- or mu+ mu- into tbar t at energies near the threshold is not affected by the large Coulomb-type corrections, which greatly modify the total cross section. Thus the longitudinal polarization, although small, may provide an independent information on the mass and the width of the top quark, largely independent of the uncertainty in alpha_s.

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