Testing the Standard Model with Electron Dipole Moments

Our new ACME measurement of the electron electric dipole moment* has a sensitivity greater than past measurements by a factor of 12. The result is consistent with the standard model prediction rather than supersymmetric models, for example. Meanwhile, our measurement of the electron magnetic dipole moment** agrees with the standard model’s most precise prediction to a part in 10$^{12}$ , though there is now a 2.4 standard deviation separation of measurement and prediction. A new measurement has been started.\\ \\ * ACME Collaboration, Nature 562, 355 (2018)\\ \\ ** D. Hanneke, S. Fogwell Hoogerheide and G. Gabrielse, Phys. Rev. A, 83 052122 (2011)