The Z Penguin in Generic Extensions of the Standard Model
High Energy Physics - Phenomenology
2021-04-19 v2
Abstract
Precision flavour observables play an important role in the interpretation of results at the LHC in terms of models of new physics. We present the result for the one-loop Z penguin in generic extensions of the standard model which exhibit exact perturbative unitarity. We use Slavnov-Taylor identities to study the implications of unitarity on the renormalisation of the Z penguin, and derive a manifestly finite result that depends on a reduced set of physical couplings.
Keywords
Cite
@article{arxiv.1903.05116,
title = {The Z Penguin in Generic Extensions of the Standard Model},
author = {Joachim Brod and Martin Gorbahn},
journal= {arXiv preprint arXiv:1903.05116},
year = {2021}
}
Comments
28 pages, 2 figures; improved discussion, version as published in JHEP