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Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider
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Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider
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Paper
Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider
2024
Overview
We revisit the possibility that light axion-like particles (ALPs) with lepton flavor violating couplings could give significant contributions to the electron's anomalous magnetic moment \\(g_e-2\\). Unlike flavor diagonal lepton-ALP couplings, which are exclusively axial, lepton flavor violating couplings can have arbitrary chirality. Focusing on the \\(e\\)-\\(\\tau\\) ALP coupling, we find that the size of the contribution to \\(g_e-2\\) depends strongly on the chirality of the coupling. A significant part of the parameter space for which such a coupling can explain experimental anomalies in \\(g_e-2\\) can be probed at the Electron-Ion Collider, which is uniquely sensitive to the chirality of the coupling using the polarization of the electron beam.
Publisher
Cornell University Library, arXiv.org
Subject
