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

1999/08/31 by S. Catani, M. Grazzini · 1 citation
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1016/s0550-3213(99)00778-6

published as Nucl.Phys. B570 (2000) 287-325 · latex, 38 pages, 11 eps figures

arxiv created 1999/08/31 · arxiv updated 2015/06/25

Abstract

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(as²).

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