2000 character limit reached
On the Subleading-Soft Behaviour of QCD Amplitudes (1411.1669v1)
Published 6 Nov 2014 in hep-th and hep-ph
Abstract: 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.