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

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).

preprint1999arXivOpen access
S. CataniM. Grazzini
hep-ph
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Open access2 authors1 topic
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S. CataniM. Grazzini

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