Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider
| Autor: | Davoudiasl, Hooman, Marcarelli, Roman, Neil, Ethan T. |
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| Rok vydání: | 2024 |
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| Zdroj: | Phys.Rev.D 109 (2024) 11, 115013 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevD.109.115013 |
| Popis: | 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. Comment: 5 pages, 3 figures. v2: update to published version |
| Databáze: | arXiv |
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