Paper
QED vertex form factors at two loops
Authors
Abstract
We present the closed analytic expression of the form factors of the two-loop QED vertex amplitude for on-shell electrons of finite mass and arbitrary momentum transfer . The calculation is carried out within the continuous -dimensional regularization scheme, with a single continuous parameter , the dimension of the space-time, which regularizes at the same time UltraViolet (UV) and InfraRed (IR) divergences. The results are expressed in terms of 1-dimensional harmonic polylogarithms of maximum weight 4.