Electroweak nuclear radii constrain the isospin breaking correction to $V_{ud}$
Nuclear Theory
2023-01-13 v2 High Energy Physics - Experiment
High Energy Physics - Phenomenology
Nuclear Experiment
Abstract
We lay out a novel formalism to connect the isospin-symmetry breaking correction to the rates of superallowed nuclear beta decays, , to the isospin-breaking sensitive combinations of electroweak nuclear radii that can be accessed experimentally. We individuate transitions in the superallowed decay chart where a measurement of the neutron skin of a stable daughter even at a moderate precision could already help discriminating between models used to compute . We review the existing experimental situation and make connection to the existing and future experimental programs.
Keywords
Cite
@article{arxiv.2208.03037,
title = {Electroweak nuclear radii constrain the isospin breaking correction to $V_{ud}$},
author = {Chien-Yeah Seng and Mikhail Gorchtein},
journal= {arXiv preprint arXiv:2208.03037},
year = {2023}
}
Comments
Version to appear on PLB. Some typos (e.g. the expansion formula of $\bar{f}_+(t)$) are corrected and a new section on experimental feasibility is included