Radiative corrections to the axial anomaly
Ansel'm A. A. , Iogansen A. A.
The anomaly in the divergence of the axial current is not exhausted by a single loop. A component which has previously been neglected comes from the diagrams representing the scattering of light by light. The radiative corrections are calculated for QED, a non-Abelian gauge theory, and a supersymmetric gauge theory.