Two-loop electroweak threshold corrections to the bottom and top Yukawa couplings

Link:

https://doi.org/10.1016/j.nuclphysb.2014.05.029

Autor/in:

Erscheinungsjahr:

2014

Medientyp:

Text

Beschreibung:

We study the relationship between the MS- Yukawa coupling and the pole mass for the bottom and top quarks at the two-loop electroweak order O(α2) in the gaugeless limit of the standard model. We also consider the MS- to pole mass relationships at this order, which include tadpole contributions to ensure the gauge independence of the MS- masses. In order to suppress numerically large tadpole contributions, we propose a redefinition of the running heavy-quark mass in terms of the MS- Yukawa coupling. We also present δ. r in the MS- scheme at O(α2) in the gaugeless limit. As an aside, we also list the exact two-loop expression for the mass counterterms of the bottom and top quarks. © 2014 The Authors.

Lizenz:

info:eu-repo/semantics/openAccess

Quellsystem:

Forschungsinformationssystem der UHH

Interne Metadaten

Quelldatensatz: oai:www.edit.fis.uni-hamburg.de:publications/e0513e66-8180-498a-9ecd-18e84afa9fef