Sub-GeV $U(1)_{R}$ gauge boson to address the proton radius discrepancy
High Energy Physics - Phenomenology
2021-12-30 v2 High Energy Physics - Experiment
Abstract
We propose a Standard Model extension by a gauge symmetry where only right-handed chiral fermions can carry a non-trivial charge. Here we show that the simplest anomaly-free solution to accommodate the proton charge radius discrepancy takes right-handed muons and first generation quarks, and . Consistency with the latest muon's measurements is achieved through an extra light scalar, which itself must lie in the tens of MeV mass range to be viable.
Keywords
Cite
@article{arxiv.2107.04716,
title = {Sub-GeV $U(1)_{R}$ gauge boson to address the proton radius discrepancy},
author = {Carlos Alvarado and Alfredo Aranda and Cesar Bonilla},
journal= {arXiv preprint arXiv:2107.04716},
year = {2021}
}
Comments
14 pages, 6 figures, 2 tables. v2: typos corrected, references added. Matches published version in PRD