Massive QCD amplitudes at higher orders

Details Massive QCD amplitudes at higher orders Massive QCD amplitudes at higher orders

2007-11-07

arxiv.org/abs/0711.1121v1

Acta Phys.Polon.B38:3507-3516,2007; PoS RADCOR2007:027,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, presented at the conferences `Matter to the Deepest', Ustron (Poland), September '07, and Radcor 2007, Florence (Ital

Scientific paper

We consider the factorization properties of on-shell QCD amplitudes with massive partons in the limit when all kinematical invariants are large compared to the parton mass and discuss the structure of their infrared singularities. The dimensionally regulated soft poles and the large collinear logarithms of the parton masses exponentiate to all orders. Based on this factorization a simple relation between massless and massive scattering amplitudes in gauge theories can be established. We present recent applications of this relation for the calculation of the two-loop virtual QCD corrections to the hadro-production of heavy quarks.

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