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 — preprints:1997:ttp97-40 [2016/03/17 11:03] (current) Line 1: Line 1: + ====== TTP97-40 O(\alpha_s^2) Corrections to Top Quark Production at e^+e^- Colliders ====== + + + In this article we evaluate mass corrections up to $O((m^2/q^2)^6)$ to the + three-loop polarization function induced by an axial-vector + current. Special emphasis is put on the evaluation of the singlet + diagram which is absent in the vector case.  As a physical application + $O(\alpha_s^2)$ corrections to the production of top quarks at + future $e^+e^-$ colliders is considered.  It is demonstrated that for + center of mass energies $\sqrt{s} >~ 500$ GeV the inclusion of the + first seven terms into the cross section leads to a reliable + description. + + + |**R. Harlander and M. Steinhauser**  | + |** Eur. Phys. J. C 2 151-158 1998  **  | + | {{preprints:1997:ttp97-40.pdf|PDF}} {{preprints:1997:ttp97-40.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9710413|arXiv]]   | + | |