Schwinger terms and covariant bjorken expansions for two- and three-point functions

Abstract

We show how the limitations on the Schwinger terms due to covariance requirements allow us to get a covariant asymptotic expansion for the Fourier transforms ofT*-products, when the relevant momenta go to ∞. The resulting recipe is given explicitly for two-and three-point functions and can be generalized ton-point functions.