Electron $g-2$ corrections from axion dark matter

Published 10 Aug 2023 in hep-ph and hep-th | (2308.05375v2)

Abstract: We consider the effects of a local axion dark matter background on the $g-2$ of the electron. We calculate loop corrections to the photon-electron vertex and determine analytical formulas for the spin and cyclotron frequencies when the electron is in an external magnetic field. By comparing with current measurements of these observables, we are able to place the strongest constraint on the axion-elecron coupling for axion masses below $3\times10^{{-18}\text{eV}$.}