On the Subleading-Soft Behaviour of QCD Amplitudes
classification
✦ hep-th
hep-ph
keywords
amplitudesbehavioursoftcontrolledderiveddifferentialelaborateemission
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We elaborate on the radiative behaviour of tree-level scattering amplitudes in the soft regime. We show that the sub-leading soft term in single-gluon emission of quark-gluon amplitudes in QCD is controlled by differential operators, whose universal form can be derived from both on-shell recursion relation and gauge invariance, as it was shown to hold for graviton- and gluon-scattering.
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Cited by 1 Pith paper
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NLP threshold corrections to W+jet production
Computes helicity-dependent NLP leading logs in W+jet production via spinor shifts and soft quark operators, confirming agreement with a universal NLP structure for massive colourless final states plus jet.
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