Two-loop Electroweak Corrections to the Top-Quark Contribution to $\epsilon_K$
High Energy Physics - Phenomenology
2022-01-05 v1
Abstract
The parameter measures violation in the neutral kaon system. It is a sensitive probe of new physics and plays a prominent role in the global fit of the Cabibbo-Kobabyashi-Maskawa matrix. The perturbative theory uncertainty is currently dominated by the top-quark contribution. Here, we present the calculation of the full two-loop electroweak corrections to the top-quark contribution to , including the resummation of QED-QCD logarithms. We discuss different renormalization prescriptions for the electroweak input parameters. In the traditional normalization of the weak Hamiltonian with two powers of the Fermi constant , the top-quark contribution is shifted by .
Keywords
Cite
@article{arxiv.2108.00017,
title = {Two-loop Electroweak Corrections to the Top-Quark Contribution to $\epsilon_K$},
author = {Joachim Brod and Sandra Kvedaraitė and Zachary Polonsky},
journal= {arXiv preprint arXiv:2108.00017},
year = {2022}
}
Comments
26 pages, 6 figures