Heavy-quark production in massless quark scattering at two loops in QCD

Details Heavy-quark production in massless quark scattering at two loops in QCD Heavy-quark production in massless quark scattering at two loops in QCD

2007-05-14

arxiv.org/abs/0705.1975v1

Phys.Lett.B651:147-159,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages latex, 2 figures

Scientific paper

10.1016/j.physletb.2007.06.020

We present the two-loop virtual QCD corrections to the production of heavy quarks in the quark--anti-quark--annihilation channel in the limit when all kinematical invariants are large compared to the mass of the heavy quark. Our result is exact up to terms suppressed by powers of the heavy-quark mass. The derivation is based on a simple relation between massless and massive scattering amplitudes in gauge theories proposed recently by two of the authors as well as a direct calculation of the massive amplitude at two loops. The results presented here form an important part of the next-to-next-to-leading order QCD contributions to heavy-quark production in hadron-hadron collisions.

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