JILA’s search for the electron electric dipole moment (eEDM): constraining beyond Standard Model physics and time-varying eEDM

We have performed a measurement of the electron’s permanent electric dipole moment (eEDM) using trapped molecular ions polarized in rotating bias fields. Our initial analysis of the data yielded a mean consistent with zero, assuming no time-variation in the signal. We have recently re-analyzed the data to constrain possible oscillations in the signal over eight orders of magnitude in frequency. This re-analysis allows us to constrain the mass of the hypothetical axion, which (if present) would generate an oscillatory signal in the eEDM channel. In this talk, I will review the essence of our measurement as well as our most recent re-analysis.