Top quark polarization at a polarized linear e+ e- collider
Abstract
We discuss the polarization of top quarks produced at a polarized linear e+ e- collider. Close-to-maximal values of the top quark polarization can be achieved with longitudinal beam polarizations (h- = -0.80, h+ = +0.625) or (h- = +0.80, h+ = -0.625) at intermediate beam energies. The option (h- = -0.80, h+ = +0.625) has to be preferred since this choice is quite stable against variations of the beam polarization. All our quantitative results have been obtained at NLO QCD.
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