On the dipole moments of fermions at two loops

Abstract

Complete two-loop electroweak corrections to leptonic anomalous magnetic moments have been calculated recently using asymptotic expansions of Feynman diagrams. Techniques developed in that context can also be applied to the electric dipole moments (EDM) of fermions. In the Standard Model the EDM was proved to vanish at two loops. In a recent calculation of two-loop electroweak corrections to g − 2 of leptons [1] we have applied computing techniques based on asymptotic expansion of the Feynman diagrams [2]. Similar tools have many other important applications, especially in low energy physics. In the