Theory Seminar

Gauge Invariance and Finite Counterterms in Chiral Gauge Theories

by Claudia Cornella (Uni Mainz)

Europe/Berlin
Wegelerstraße 10/2-2.019 - Seminar Room BCTP I (PI)

Wegelerstraße 10/2-2.019 - Seminar Room BCTP I

PI

25
Description

Any consistent regularization scheme induces an apparent violation of gauge invariance in non-anomalous chiral gauge theories. This violation shows up in perturbative calculations, and can be removed by including appropriate finite counterterms. In this talk I will discuss the derivation of such counterterms for a renormalizable chiral gauge theory.  I will use the background field method, which ensures background gauge invariance in the quantized theory. As a concrete application, I will show the finite counterterm at one loop in the Standard Model, within dimensional regularization and the Breitenlohner-Maison-'t Hooft-Veltman prescription for gamma5.