Virtual Photons in Chiral Perturbation Theory

Abstract

In the framework of chiral perturbation theory virtual photons are included. We calculate the divergences of the generating functional to one loop and determine the structure of the local action that incorporates the counterterms which cancel the divergences. As an application we discuss the corrections to Dashen's theorem at order [e^2*m(quark)].

Comments: 19 pages , LaTex, 1 figure appended as PostScript file, (little corrections on the pages 8 and 17 - the physical results are not affected), BUTP-94/9