Two-loop form factors for diphoton production in quark annihilation channel with heavy quark mass dependence

TL;DR

This paper computes two-loop form factors for diphoton production in quark annihilation, including heavy quark mass effects, which are crucial for precise NNLO QCD predictions at the LHC.

Contribution

It provides the first full-mass dependence two-loop form factors for diphoton production in the quark annihilation channel.

Findings

Master integrals evaluated using differential equations.

Results enable more accurate NNLO QCD calculations.

Enhances understanding of heavy quark effects in diphoton production.

Abstract

We present the computation of the two-loop form factors for diphoton production in the quark annihilation channel. These quantities are relevant for the NNLO QCD corrections to diphoton production at LHC recently presented in arXiv:2308.10885. The computation is performed retaining full dependence on the mass of the heavy quark in the loops. The master integrals are evaluated by means of differential equations which are solved exploiting the generalised power series technique.