Sep 9 – 13, 2019
Europe/Zurich timezone

Renormalization schemes for mixing angles

Sep 12, 2019, 4:00 PM
25m
Chambre du Trésorier

Chambre du Trésorier

Speaker

Ansgar Denner (Julius Max. Universitaet Wuerzburg (DE))

Description

The proper renormalization of mixing angles in quantum field theories
is a long-standing problem. It is relevant for the renormalization of the
quark mixing matrix in the Standard Model and for various mixing
scenarios in theories beyond. In this talk we specifically consider
theories with extended scalar sectors. We review existing renormalization
schemes for mixing angles and introduce new ones based on on-shell
conditions or symmetry requirements such as rigid or background-field
gauge invariance. Considering in particular the renormalization of the
mixing angles in the Two-Higgs-Doublet Model and the Higgs-Singlet Extension
of the Standard Model, we compare electroweak corrections
within these models for a selection of renormalization schemes.

Primary author

Ansgar Denner (Julius Max. Universitaet Wuerzburg (DE))

Co-authors

Stefan Dittmaier (Albert Ludwigs Universitaet Freiburg (DE)) Jean-Nicolas Lang (University of Zurich)

Presentation materials