====== TTP97-40 O(\alpha_s^2) Corrections to Top Quark Production at e^+e^- Colliders ======
 
 
   <hidden 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.
 
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|**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]]   |
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