One-loop hexagon integral to higher orders in the dimensional regulator

• DOI: 10.1007/jhep01(2023)096
• Publication Date: 2023-01-19T07:21:48Z
• Authors: Johannes M. Henn; Antonela Matijašić; Julian Miczajka
• Keywords: Dimensional regularization; Regularization; Helicity

A bstract The state-of-the-art in current two-loop QCD amplitude calculations is at five-particle scattering. Computing six-particle processes requires knowledge of the corresponding one-loop amplitudes to higher orders dimensional regulator. In this paper we compute analytically hexagon integral via differential equations. particular identify its function alphabet for general D -dimensional external states. We also provide representations all integrals up weight four. With this, basis ready applications. study detail difference between conventional regularization and four-dimensional helicity scheme level master their space.