Simon Badger, Heribertus Bayu Hartanto, Zihao Wu, Yang Zhang, Simone Zoia
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Two-loop amplitudes for $\mathcal{O}(α_s^2)$ corrections to $Wγγ$ production at the LHC
We present the two-loop helicity amplitudes contributing to the
next-to-next-to-leading order QCD predictions for W-boson production in
association with two photons at the Large Hadron Collider. We derived compact
analytic expressions for the two-loop amplitudes in the leading colour limit,
and provide numerical results for the subleading colour contributions. We
employ a compact system of integration-by-part identities provided by the
NeatIBP package, allowing for an efficient computation of the rational
coefficients of the scattering amplitudes over finite fields.
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