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Geometric IR subtraction for final state real radiation

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Original languageEnglish
Article number6
JournalJournal of High Energy Physics
Publication statusPublished - 2 Aug 2018


A scheme is proposed for the subtraction of soft and collinear divergences present in massless final state real emission phase space integrals. The scheme is based on a local slicing procedure which utilises the soft and collinear factorisation properties of amplitudes to produce universal counter-terms whose analytic integration is relatively simple. As a first application the scheme is applied to establish a general pole formula for final state real radiation at NLO and NNLO in Yang Mills theory for arbitrary multiplicities. All required counter-terms are evaluated to all orders in the dimensional regulator in terms of Γ — and pFq hypergeometric — functions. As a proof of principle the poles in the dimensional regulator of the H → gggg double real emission contribution to the H → gg decay rate are reproduced.

    Research areas

  • hep-ph, hep-th

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