Axial Contributions at the Top Threshold
J.H. Kuhn, T. Teubner
TL;DR
This paper calculates the axial current contributions to top quark pair production at threshold in e+ e- collisions, incorporating QCD effects up to two loops and showing how beam polarization can isolate these contributions.
Contribution
It provides a detailed calculation of axial current effects in top pair production near threshold, including QCD corrections and polarization dependence, which was not previously fully explored.
Findings
Axial current contributions significantly affect the cross section.
Beam polarization enables independent extraction of axial current effects.
QCD corrections up to two loops are essential for accurate predictions.
Abstract
We calculate the contributions of the axial current to top quark pair production in e+ e- annihilation at threshold. The QCD dynamics is taken into account by solving the Lippmann-Schwinger equation for the P wave production using the QCD potential up to two loops. We demonstrate that the dependence of the total and differential cross section on the polarization of the e+ and e- beams allows for an independent extraction of the axial current induced cross section.
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