Triple-real contribution to the quark beam function in QCD at next-to-next-to-next-to-leading order

• DOI: 10.1007/jhep06(2019)033
• Publication Date: 2019-06-12T07:51:52Z
• Authors: K. Melnikov; R. Rietkerk; L. Tancredi; C. Wever
• Keywords: Physics; ddc:530; FOS: Physical sciences; QC770-798; QCD Phenomenology; 530; 01 natural sciences; High Energy Physics - Phenomenology; High Energy Physics - Phenomenology (hep-ph); NLO Computations; Nuclear and particle physics. Atomic energy. Radioactivity; 0103 physical sciences; info:eu-repo/classification/ddc/530

We compute the three-loop master integrals required for calculation of triple-real contribution to N$^3$LO quark beam function due splitting a into virtual and three collinear gluons, $q \to q^*+ggg$. This provides an important ingredient leading-color at N$^3$LO.