Revisiting the double-soft asymptotics of one-loop amplitudes in massless QCD

Autor:	Michał Czakon, Felix Eschment, Tom Schellenberger
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	Nuclear and High Energy Physics High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) FOS: Physical sciences ddc:530
Zdroj:	Journal of high energy physics : JHEP 2023(4), 65 (2023). doi:10.1007/JHEP04(2023)065 Journal of High Energy Physics
DOI:	10.1007/JHEP04(2023)065
Popis:	We evaluate the one-loop soft current for the emission of two soft gluons or a soft quark-anti-quark pair in massless Quantum Chromodynamics. The results are exact in dimensional regularisation up to a single Feynman integral. Two terms of the Taylor series of the latter integral as a function of $\epsilon \equiv (4-d)/2$ with $d$ the dimension of spacetime are available from a recent calculation of one-loop triple-collinear splitting functions. Our formulae are necessary for the construction of a subtraction scheme for the evaluation of next-to-next-to-next-to-leading order cross sections in massless QCD. Comment: 27 pages, 14 figures
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::299bca40f72680df1251651d59f46919 http://arxiv.org/abs/2211.06465 Zobrazit plný text záznamu