Two-loop leading colour QCD corrections to $q \bar{q} \to \gamma \gamma g$ and $q g \to \gamma \gamma q$

Understand

We present the leading colour and light fermionic planar two-loop corrections for the production of two photons and a jet in the quark-antiquark and quark-gluon channels.

• In particular, we compute the interference of the two-loop amplitudes with the corresponding tree level ones, summed over colours and polarisations.
• Our calculation uses the latest advancements in the algorithms for integration-by-parts reduction and multivariate partial fraction decomposition to produce compact and easy-to-use results.
• We have implemented our results in an efficient C++ numerical code.