NNLO subtraction for any massless final state: a complete analytic expression
arxiv(2022)
摘要
We use the Local Analytic Sector Subtraction scheme to construct a completely
analytic set of expressions implementing a fully local infrared subtraction at
NNLO for generic coloured massless final states. The cancellation of all
explicit infrared poles appearing in the double-virtual contribution, in the
real-virtual correction and in the integrated local infrared counterterms is
explicitly verified, and all finite contributions arising from integrated local
counterterms are analytically evaluated in terms of ordinary polylogarithms up
to weight three. The resulting subtraction formula can readily be implemented
in any numerical framework containing the relevant matrix elements up to NNLO.
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