Four-loop photon quark form factor and cusp anomalous dimension in the large-N c limit of QCD

Abstract

Abstract We compute the four-loop QCD corrections to the massless quark-anti-quark-photon form factor F q in the large-N c limit. From the pole part we extract analytic expressions for the corresponding cusp and collinear anomalous dimensions.

Keywords

• Perturbative QCD
• Scattering Amplitudes