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The two-loop soft current in dimensional regularization

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arxiv 1309.4393 v1 pith:DZ4FYK46 submitted 2013-09-17 hep-ph hep-th

Claude Duhr , Thomas Gehrmann This is my paper · ORCID
classification hep-phhep-th
keywords currentsoftdimensionalpartonsregularizationtwo-loopamplitudesbehavior
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The soft current describes the factorization behavior of quantum chromodynamics (QCD) scattering amplitudes in the limit of vanishing energy of one of the external partons. It is process-independent and can be expanded in a perturbative series in the coupling constant. To all orders in the dimensional regularization parameter, we compute the two-loop correction to the soft current for processes involving two hard partons.

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  1. Low-energy theory of jet processes and PDF factorization

    hep-ph 2025-09 conditional novelty 6.0 of 10

    A three-loop Glauber contribution to low-energy soft-collinear matrix elements exactly cancels the collinear factorization-violating terms, so DGLAP running and PDF factorization are consistent with super-leading logarithms.

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