# Three-loop helicity amplitudes for photon+jet production

**Authors:** Piotr Bargiela, Amlan Chakraborty, Giulio Gambuti  
**arXiv:** [2212.14069](https://arxiv.org/abs/2212.14069)  
**Date:** 2022-12-28  
**Summary page:** https://www.summarizepaper.com/fr/arxiv-id/2212.14069v1/

## Abstract

We present three-loop helicity amplitudes for the production of a single photon in association with one jet in Quantum Chromodynamics, a final state which provides a standard candle of the Standard Model at the Large Hadron Collider. We employ a recently-proposed variation of the so-called tensor projection method in the 't Hooft-Veltman scheme (tHV) which avoids the computation of contributions due to unphysical (-2$\epsilon$)-dimensional polarisations of the external states. We obtain compact analytic results expressed in terms of harmonic polylogarithms.