Two-loop leading colour QCD corrections to $$ q\overline{q} $$ → γγg and qg → γγq

• DOI: 10.1007/jhep04(2021)201
• Publication Date: 2021-04-21T20:03:34Z
• Authors: Bakul Agarwal; Federico Buccioni; Andreas von Mante...; Lorenzo Tancredi
• Keywords: High Energy Physics - Theory; High Energy Physics - Phenomenology; NLO Computations; Nuclear and particle physics. Atomic energy. Radioactivity; 0103 physical sciences; QC770-798; QCD Phenomenology; 01 natural sciences

A bstract We present the leading colour and light fermionic planar two-loop corrections for production of two photons a jet in quark-antiquark quark-gluon channels. In particular, we compute interference amplitudes with corresponding tree level ones, summed over colours polarisations. Our calculation uses latest advancements algorithms integration-by-parts reduction multivariate partial fraction decomposition to produce compact easy-to-use results. have implemented our results an efficient C++ numerical code. also provide their analytic expressions Mathematica format.