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Triple-real contribution to the quark beam function in QCD at next-to-next-to-next-to-leading order

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arxiv 1904.02433 v2 pith:KOIZ4DGW submitted 2019-04-04 hep-ph

classification hep-ph
keywords quarkbeamcontributionfunctioncalculationtriple-realcollinearcompute
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We compute the three-loop master integrals required for the calculation of the triple-real contribution to the N$^3$LO quark beam function due to the splitting of a quark into a virtual quark and three collinear gluons, $q \to q^*+ggg$. This provides an important ingredient for the calculation of the leading-color contribution to the quark beam function at N$^3$LO.

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Cited by 1 Pith paper

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  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...

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