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Computation of the Soft Anomalous Dimension Matrix in Coordinate Space

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arxiv 1005.4646 v1 pith:XDIRXUV3 submitted 2010-05-25 hep-ph

Alexander Mitov , George Sterman , Ilmo Sung This is my paper · ORCID
classification hep-ph
keywords coordinatespaceanomalousdimensionmatrixsoftmassivetwo-loop
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We complete the coordinate space calculation of the three-parton correlation in the two-loop massive soft anomalous dimension matrix. The full answer agrees with the result found previously by a different approach. The coordinate space treatment of renormalized two-loop gluon exchange diagrams exhibits their color symmetries in a transparent fashion. We compare coordinate space calculations of the soft anomalous dimension matrix with massive and massless eikonal lines and examine its nonuniform limit at absolute threshold.

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  1. 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.

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