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arxiv: 2409.08146 · v2 · pith:7WA5XZKRnew · submitted 2024-09-12 · ✦ hep-ph

Two-loop amplitudes for mathcal{O}(α_s²) corrections to Wγγ production at the LHC

Simon Badger , Heribertus Bayu Hartanto , Zihao Wu , Yang Zhang , Simone Zoia This is my paper
classification ✦ hep-ph
keywords amplitudestwo-loopcolourcompactgammaproductionallowingalpha
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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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