Effective theories with broken flavor symmetry

Abstract

We generalize the work of Ovrut and Schnitzer on effective theories derived from a non-Abelian gauge theory to include the physically interesting case of broken flavor symmetry. Our calculations are performed at the one-loop level. We show that at an intermediate stage in the calculations two distinct renormalized gauge coupling constants appear, one describing gauge field coupling to heavy particles and the other describing coupling to light particles. Appropriately modified Slavnov-Taylor identities are shown to hold. We also consider a simple alternative to the Ovrut-Schnitzer rules for calculating with effective theories.