Top quark polarization as a probe of $t\bar{t}$ threshold dynamics

Details Top quark polarization as a probe of $t\bar{t}$ threshold dynamics Top quark polarization as a probe of $t\bar{t}$ threshold dynamics

1994-03-08

arxiv.org/abs/hep-ph/9403246v1

Z.Phys. C64 (1994) 45-56

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages. Figures available upon request

Scientific paper

10.1007/BF01557234

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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