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

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... Show more