Flavor-violating ALPs, electron g − 2 , and the Electron-Ion Collider

Davoudiasl, Hooman; Marcarelli, Roman; Neil, Ethan T.

doi:10.1103/PhysRevD.109.115013

Flavor-violating ALPs, electron $g - 2$ , and the Electron-Ion Collider

Journal Article · Fri Jun 14 00:00:00 EDT 2024 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.109.115013· OSTI ID:2373269

; Marcarelli, Roman;

We revisit the possibility that light axionlike 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.

Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0012704; SC0010005; SC0014664

OSTI ID:: 2373269

Alternate ID(s):: OSTI ID: 2352199

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 11 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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