The two-loop soft current in dimensional regularization
arXiv:1309.4393 · doi:10.1016/j.physletb.2013.10.063
Abstract
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.
4 pages