The three-loop cusp anomalous dimension in QCD and its supersymmetric extensions
The three-loop cusp anomalous dimension in QCD and its supersymmetric extensions
We present the details of the analytic calculation of the three-loop angle-dependent cusp anomalous dimension in QCD and its supersymmetric extensions, including the maximally supersymmetric $$ \mathcal{N}=4 $$ super Yang-Mills theory. The three-loop result in the latter theory is new and confirms a conjecture made in our previous paper. We …