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Two-loop helicity amplitudes for diphoton plus jet production in full color

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arxiv 2105.04585 v1 pith:XCQAGMHC submitted 2021-05-10 hep-ph

classification hep-ph
keywords two-loophelicityamplitudescolorcorrectionsproductionaccountamplitude
verification ladder T0 review T1 audit T2 compute T3 formal

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We present the complete two-loop corrections in massless QCD for the production of two photons and a jet, taking into account all color structures. In particular, we analytically compute all two-loop helicity amplitudes for the quark-antiquark, quark-gluon, and antiquark-gluon channel, and check them with an independent calculation of the polarization-summed interference with the tree amplitude. This is the first time that two-loop QCD corrections to a five-point scattering process have been computed beyond the leading-color approximation for all helicity configurations.

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Cited by 12 Pith papers

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

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    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...

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    First analytic full-color two-loop five-particle amplitudes for associated Higgs-plus-bottom-quark-pair production at the LHC, with public C++ implementation.

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

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    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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  12. Rational-function interpolation from p-adic evaluations in scattering amplitude calculations

    hep-ph 2024-12 conditional novelty 3.0 of 10

    A p-adic interpolation method reconstructs loop-amplitude rational functions directly in partial-fractioned form, cutting required probes by about 25x and output size by about 134x on a challenging two-loop five-point...

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