# Gauge Invariance and Finite Counterterms in Chiral Gauge Theories

### APA

Cornella, C. (2022). Gauge Invariance and Finite Counterterms in Chiral Gauge Theories. Perimeter Institute. https://pirsa.org/22070001

### MLA

Cornella, Claudia. Gauge Invariance and Finite Counterterms in Chiral Gauge Theories. Perimeter Institute, Jul. 12, 2022, https://pirsa.org/22070001

### BibTex

@misc{ pirsa_PIRSA:22070001, doi = {10.48660/22070001}, url = {https://pirsa.org/22070001}, author = {Cornella, Claudia}, keywords = {Particle Physics}, language = {en}, title = {Gauge Invariance and Finite Counterterms in Chiral Gauge Theories}, publisher = {Perimeter Institute}, year = {2022}, month = {jul}, note = {PIRSA:22070001 see, \url{https://pirsa.org}} }

**Collection**

**Subject**

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.

Zoom Link: https://pitp.zoom.us/j/95507223984?pwd=Y0FDTEJpNDlVaE9Ba1ZNMURXeS9rdz09