Two-loop amplitude for mixed QCD-EW corrections to $gg\to Hg$

Abstract

We report on the two-loop amplitude computation for the mixed QCD-electroweak corrections to the process $gg\to Hg$, with exact dependence on the electroweak boson masses. This amplitude has been employed in the computation of next-to-leading order (NLO) mixed QCD-electroweak corrections to the Higgs-boson production rate in arXiv:2010.09451. The master integrals that appear in the amplitude are evaluated by means of generalized power series expansions, which allows for fast and high-precision numerical evaluation of the amplitude in the physical phase-space, proving to be a powerful tool for phenomenological applications.

Comments: 23 pages, 2 figures