A Large Muon EDM from Dark Matter

Abstract

We explore a model of dark matter (DM) that can explain the reported discrepancy in the muon anomalous magnetic moment and predict a large electric dipole moment (EDM) of the muon. The model contains a DM fermion and new scalars whose exclusive interactions with the muon radiatively generate the observed muon mass. Constraints from DM direct and indirect detection experiments as well as collider searches are safely evaded. The model parameter space that gives the observed DM abundance and explains the muon $g-2$ anomaly leads to the muon EDM of $d_{\mu }\simeq (4$-$5)\times 10^{-22}e\mathrm{cm}$ that can be probed by the projected PSI muEDM experiment. Another viable parameter space even achieves $d_{\mu }=\mathcal{O}(10^{-21})e\mathrm{cm}$ reachable by the ongoing Fermilab Muon $g-2$ experiment and the future J-PARC Muon $g-2$/EDM experiment.

arXiv comment41 pages, 5 figures, v2

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Cited by in corpus (1)

• Predictions for Muon Electric and Magnetic Dipole Moments from $h\to {\mu }^{+}{\mu }^{-}$ in Two-Higgs-Doublet Models with New Leptons