HEP Theory Seminar

Gauge Invariance and Finite Counterterms in Chiral Gauge Theories

by Claudia Cornella (Uni Mainz)

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

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


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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.