Constraints on the dark photon from parity violation and the $W$ mass
Abstract
We present an analysis of the experimental data for parity-violating electron scattering (PVES) and atomic parity-violation, including the effects of a dark photon. We derive the favored region of dark photon parameter space, which provides a good description of the experimental data from the Qweak Collaboration and the Jefferson Lab PVDIS Collaboration and simultaneously relieves the tension between the neutron skin thickness determined in the PREX-II experiment and nuclear-model predictions. In addition, we extract the parameter region required to explain the latest W-boson mass anomaly. Our results indicate that a heavy dark photon with mass above the Z boson mass is favored, while other sources of new physics beyond the Standard Model in addition to the dark photon would also be expected.
Keywords
Cite
@article{arxiv.2205.01911,
title = {Constraints on the dark photon from parity violation and the $W$ mass},
author = {A. W. Thomas and X. G. Wang},
journal= {arXiv preprint arXiv:2205.01911},
year = {2022}
}
Comments
6 pages, 1 table, 1 figure. The fit result is updated. More references are added