Top Quark Pair Production at Threshold: Complete Next-to-next-to-leading Order Relativistic Corrections
Abstract
The complete next-to-next-to-leading order (i.e. O(v2), O(v αs) and O(αs2)) relativistic corrections to the total photon mediated t t production cross section at threshold are presented in the framework of nonrelativistic quantum chromodynamics. The results are obtained using semi-analytic methods and ``direct matching''. The size of the next-to-next-to-leading order relativistic corrections is found to be comparable to the size of the next-to-leading order ones.
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