Search for New Physics with Electron's Dipole Moments

by Xing Fan (Northwestern University)

Wednesday 25 Sept 2024, 14:00 → 16:00 UTC

Meeting ID: 685 9855 1315 Passcode: 144334 (https://ubc.zoom.us/j/68598551315?pwd=U9Kr5AbNNbhbhoadzJlgdBGhs3WyRj.1)

 A major goal of modern particle physics is to search for phenomena that are in conflict with our best theoretical understanding of nature, the Standard Model (SM). One approach in the search occurs at the laboratory scale where the SM?s most precise predictions are tested by the most precise measurements of fundamental particles. Deviations at this high-precision frontier would inform the search for Beyond the SM (BSM) physics. The electron Magnetic Dipole Moment (so-called g-factor) is the most precise prediction of the SM. In our most recent measurement, a 2-sigma deviation was observed with the SM prediction. The deviation, together with the muon g-factor discrepancy, motivates new theories beyond the SM. The key techniques, involving an isolated electron in an ion trap and quantum measurement, will be presented. The electron Electric Dipole Moment (EDM) serves as a sensitive probe of physics Beyond the SM. The ACME experiment uses a cold molecule beam to establish a stringent constraint on the eEDM. With the goal of improving the sensitivity by a factor of 40, a new beamline is being constructed at Northwestern University. I will present the principles of this eEDM measurement and my contribution to the experiment.