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Two-loop leading colour QCD corrections to q bar{q} to γ γ g and q g to γ γ q

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arxiv 2102.01820 v2 pith:2NKSXMW6 submitted 2021-02-03 hep-ph hep-th

Two-loop leading colour QCD corrections to q bar{q} to γ γ g and q g to γ γ q

classification hep-ph hep-th
keywords gammatwo-loopcolourcorrectionsleadingresultsadvancementsalgorithms
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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. We also provide their analytic expressions in Mathematica format.

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