Form factors and scattering amplitudes in $ \mathcal{N} = 4 $ SYM in dimensional and massive regularizations
Form factors and scattering amplitudes in $ \mathcal{N} = 4 $ SYM in dimensional and massive regularizations
The IR-divergent scattering amplitudes of N=4 supersymmetric Yang-Mills theory can be regulated in a variety of ways, including dimensional regularization and massive (or Higgs) regularization. The IR-finite part of an amplitude in different regularizations generally differs by an additive constant at each loop order, due to the ambiguity in separating …