ar X iv : h ep - p h / 94 11 39 5 v 1 2 5 N ov 1 99 4 Polarization in Top Quark Pair Production near Threshold ∗ †
نویسندگان
چکیده
The polarization dependent momentum distributions of top quarks and their decay products are calculated for t ¯ t production at future e + e − colliders with polarized beams. The Green function formalism is applied to this reaction near energy 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 at large momentum transfers and Richardson ansatz at intermediate and small ones. It is demonstrated that for the longitudinally polarized electron beam an optimally polarized sample of top quarks can be produced.
منابع مشابه
ar X iv : h ep - p h / 94 11 37 1 v 1 2 3 N ov 1 99 4 Polarization in Top Pair Production and Decay near Threshold ∗ 2 ] Presented by M .
Theoretical results are presented for top quarks produced in annihilation of polarized electrons on positrons. Polarization studies for t ¯ t 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 ...
متن کاملar X iv : h ep - p h / 97 11 23 3 v 1 4 N ov 1 99 7 Top Quark Pair Production and Decay Near Threshold in e + e − Collisions ∗
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