NNLO QCD corrections to diphoton production with an additional jet at the LHC

TL;DR

This paper presents the first NNLO QCD calculations for diphoton production with an extra jet at the LHC, significantly improving the theoretical accuracy of the diphoton transverse momentum distribution.

Contribution

It provides the first NNLO-accurate prediction for this process, enhancing precision in theoretical modeling of diphoton production at the LHC.

Findings

NNLO corrections improve prediction accuracy by up to a factor of four

The calculation is exact except for a small finite remainder

Results aid understanding of Higgs boson sector and higher-order effects

Abstract

We calculate the NNLO QCD corrections to diphoton production with an additional jet at the LHC. Our calculation represents the first NNLO-accurate prediction for the transverse momentum distribution of the diphoton system. The improvement in the accuracy of the theoretical prediction is significant, by a factor of up to four relative to NLO QCD. Our calculation is exact except for the finite remainder of the two-loop amplitude which is included at leading color. The numerical impact of this approximated contribution is small. The results of this work are expected to further our understanding of the Higgs boson sector and of the behavior of higher-order corrections to LHC processes.