A three-loop connected web contributing to the soft anomalous dimension governing long-distance singularities of multileg gauge-theory scattering amplitudes of massless partons.
From the article:
Three-Loop Corrections to the Soft Anomalous Dimension in Multileg ScatteringØyvind Almelid, Claude Duhr, and Einan Gardi
Phys. Rev. Lett. 117, 172002 (2016)
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