Axial-vector exchange contribution to the Hyperfine Splitting
High Energy Physics - Phenomenology
2022-01-27 v2
Abstract
We revisit the contribution of axial-vector mesons to the hyperfine splitting of muonic hydrogen. We focus our attention on the doubly-virtual asymptotic behavior of the relevant form factors of axial-vector mesons, together with their coupling to nucleons based on resonance saturation and short-distance constraints. Among others, we find significant differences with respect to previous studies, including an opposite sign and a effect of the doubly-virtual high-energy behavior.
Keywords
Cite
@article{arxiv.2110.11366,
title = {Axial-vector exchange contribution to the Hyperfine Splitting},
author = {Alejandro Miranda and Pablo Roig and Pablo Sanchez-Puertas},
journal= {arXiv preprint arXiv:2110.11366},
year = {2022}
}
Comments
15 pages +references, 2 figures, 4 tables. Matches published version