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arxiv: hep-ph/9403246 · v1 · submitted 1994-03-08 · ✦ hep-ph

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Top quark polarization as a probe of tbar{t} threshold dynamics

V.S. Fadin , V.A. Khoze , M.I. Kotsky
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classification ✦ hep-ph
keywords polarizationquarkpropertiesthresholdallowalphacollisionsdetermine
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We study the spin properties of top quarks produced in collisions of polarized photons in the threshold region. For a relatively heavy top quark the influence of non-perturbative effects is small and its polarization parameters can be predicted in perturbative QCD. The measurements of the top polarization may allow a novel test of QCD in the $t\bar{t}$ system. In particular, they may provide a new way to determine the precise value of $\alpha_s$ and to study the properties of the top quark.

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