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

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

Bakul Agarwal , Federico Buccioni , Andreas von Manteuffel , Lorenzo Tancredi This is my paper · ORCID
classification hep-phhep-th
keywords gammatwo-loopcolourcorrectionsleadingresultsadvancementsalgorithms
verification ladder T0 review T1 audit T2 compute T3 formal
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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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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Analytic two-loop amplitudes for $q\bar{q}\to \gamma \gamma$ and $gg \to \gamma \gamma$ mediated by a heavy-quark loop

    hep-ph 2025-01 accept novelty 8.0 of 10

    The two-loop amplitudes for q qbar -> gamma gamma and gg -> gamma gamma with a heavy-quark loop are computed analytically in terms of elliptic iterated integrals, with validated fast series expansions for numerical ev...

  2. Two-loop helicity amplitudes for diphoton production with massive quark loop

    hep-ph 2025-02 conditional novelty 7.0 of 10

    Two-loop helicity amplitudes for diphoton production with a massive top quark loop are computed, providing new analytic results for gluon fusion and benchmark numbers for both channels.

  3. Precise Predictions for Event Shapes in Diphoton Production at the LHC

    hep-ph 2025-01 accept novelty 7.0 of 10

    First NNLO (O(alpha_s^3)) QCD predictions for diphoton event shapes at the LHC, with full-color two-loop amplitudes and NLO loop-induced corrections.

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