Infrared factorization of tree-level QCD amplitudes at the next-to-next-to-leading order and beyond

M. Grazzini; S. Catani

arxiv: hep-ph/9908523 · v1 · pith:D6VISILRnew · submitted 1999-08-31 · ✦ hep-ph

Infrared factorization of tree-level QCD amplitudes at the next-to-next-to-leading order and beyond

S. Catani , M. Grazzini This is my paper

classification ✦ hep-ph

keywords infraredamplitudesordertree-levelbehaviourbeyondcollinearcompute

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We study the infrared behaviour of tree-level QCD amplitudes and we derive infrared-factorization formulae that are valid at any perturbative order. We explicitly compute all the universal infrared factors that control the singularities in the various soft and/or collinear limits at O(as^2).

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