Inverse Mass Expansion of the One-Loop Effective Action

Abstract

A method is described for the development of the one-loop effective action expansion as an asymptotic series in inverse powers of the fermion mass. The method is based on the Schwinger-DeWitt proper-time technique, which allows for loop particles with non-degenerate masses. The case with SU(2)xSU(2) as the symmetry group is considered. The obtained novel series generalizes the well-known Schwinger-De Witt inverse mass expansion for equal masses, and is chiral invariant at each order. We calculate the asymptotic coefficients up to fifth order and clarify their relationship with the standard Seeley-DeWitt coefficients.

4 pages, RevTex style, no figures. Modified title, slight changes in text, additional references, version published in Phys. Lett. B. Original title: Generalized Proper-Time Expansion of the Effective Action

References in corpus (1)

• Generalized Proper-Time Approach For The Case Of Broken Isospin Symmetry

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