Path-integral derivation of one-parameter dependent nonminimal anomalies and effective actions in Schwinger model and its variants

The one-parameter dependent nonminimal anomalies and effective actions are derived by the path-integral method using the one-parameter family of Euclidean regularization operator in Schwinger model with vector, chiral, and chirally asymmetric couplings. The authors also investigate the factorizability of fermion determinant and the physical role of regularization ambiguity in chiral Schwinger model