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Two-loop five-point massless QCD amplitudes within the IBP approach

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arxiv 1805.09182 v2 pith:NJTZDUJQ submitted 2018-05-23 hep-ph hep-th

classification hep-phhep-th
keywords five-pointmasslesstwo-loopamplitudesidentitiesnon-planarresultsscales
verification ladder T0 review T1 audit T2 compute T3 formal

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We solve the integration-by-parts (IBP) identities needed for the computation of any planar two-loop five-point massless amplitude in QCD. We also derive some new results for the most complicated non-planar topology with irreducible numerators of power as high as six. We do this by applying a new strategy for solving the IBP identities which scales better for problems with a large number of scales and/or master integrals. Our results are a proof of principle that the remaining non-planar contributions for all two-loop five-point massless QCD amplitudes can be computed in analytic form.

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Cited by 2 Pith papers

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

  1. Multi-Quark Colour Decompositions from Unitarity

    hep-ph 2019-08 accept novelty 8.0 of 10

    New tree-level colour decompositions for multi-quark QCD amplitudes with arbitrary fixed pair of partons, derived from unitarity factorisation, with explicit closed-form colour factors.

  2. Integration-by-parts reductions of Feynman integrals using Singular and GPI-Space

    hep-th 2019-08 conditional novelty 6.0 of 10

    The authors build a parallelized Singular and GPI-Space pipeline for integration-by-parts reductions and use it to compute the two-loop nonplanar double-pentagon family analytically up to numerator degree 4.

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