Two-loop helicity amplitudes for diphoton plus jet production in full color

TL;DR

This paper provides the first complete two-loop QCD helicity amplitude calculations for diphoton plus jet production, including full color structures, advancing precision in multi-particle scattering processes.

Contribution

It presents the first full-color two-loop helicity amplitudes for diphoton plus jet production in massless QCD, covering all relevant channels and helicity configurations.

Findings

Analytical computation of all two-loop helicity amplitudes.

Validation through independent polarization-summed interference calculations.

First full-color two-loop corrections for five-point scattering processes.

Abstract

We present the complete two-loop corrections in massless QCD for the production of two photons and a jet, taking into account all color structures. In particular, we analytically compute all two-loop helicity amplitudes for the quark-antiquark, quark-gluon, and antiquark-gluon channel, and check them with an independent calculation of the polarization-summed interference with the tree amplitude. This is the first time that two-loop QCD corrections to a five-point scattering process have been computed beyond the leading-color approximation for all helicity configurations.