Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider
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| Format: | Preprint |
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2024
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| _version_ | 1866917712682287104 |
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| author | Davoudiasl, Hooman Marcarelli, Roman Neil, Ethan T. |
| author_facet | Davoudiasl, Hooman Marcarelli, Roman Neil, Ethan T. |
| contents | 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 $e$-$τ$ 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2402_17821 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider Davoudiasl, Hooman Marcarelli, Roman Neil, Ethan T. High Energy Physics - Phenomenology 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 $e$-$τ$ 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. |
| title | Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2402.17821 |