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Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider

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arxiv 2402.17821 v2 pith:ZQHWI7IM submitted 2024-02-27 hep-ph

Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider

classification hep-ph
keywords couplingchiralitycouplingselectronflavoralpscolliderelectron-ion
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Neutron stars can shine a light on elusive lepton-flavor-violating dark matter

    hep-ph 2025-11 conditional novelty 7.0

    Flavor blocking keeps lepton-flavor-violating dark matter from thermalizing inside neutron stars, so p-wave annihilation stays efficient and heats the star to observable temperatures.

  2. On Exclusive Coherent Production of Bosons in Electron-Proton Collisions

    hep-ph 2026-04 unverdicted novelty 6.0

    A phenomenological 2-to-3 framework is constructed for exclusive boson electroproduction that matches flux-factorized predictions near Q^{2}=0 while capturing finite-Q^{2} effects at larger virtualities.

  3. Braking protons at the EIC: from invisible meson decay to new physics searches

    hep-ph 2025-12 unverdicted novelty 6.0

    The EIC can probe invisible pseudoscalar meson decays down to branching ratios of 10^{-8} and invisibly decaying ALPs with couplings up to 10^5 GeV for masses 0.1-2 GeV.

  4. Axion-like Particles and Lepton Flavor Violation in Muonic Atoms

    hep-ph 2026-04 unverdicted novelty 5.0

    In a simplified ALP model with flavor-violating e-μ couplings, constraints from Δa_e, μ→3e, and other processes limit the branching ratio of μ⁻e⁻→e⁻e⁻ in aluminum muonic atoms to O(10^{-20}), with resonant regions mor...

  5. Flavor physics at the EIC with b-jet tagging

    hep-ph 2026-01 conditional novelty 5.0

    Single b-jet counting in charged-current events at the EIC could probe new flavor-changing physics up to Λ_eff ≈ 5 TeV, about 30 times the collider energy, assuming tight b-tagging and polarized beams.

  6. A search for heavy axion-like particles in light-by-light scattering at the FCC-hh

    hep-ph 2026-03 unverdicted novelty 3.0

    Computes production cross sections and sensitivity limits for heavy ALPs in light-by-light scattering at FCC-hh across pp, pPb, and PbPb modes.