Physics (Internal)

Precision Comparison of the Proton and Antiproton Magnetic Moments in a Penning Trap"

This event is part of the HEE Seminar Series.

Invariance under the simultaneous action of charge conjugation, parity inversion, and time reversal (CPT) is a fundamental feature of the Standard Model. However, physics beyond the Standard Model is required to explain basic features of the universe, including matter-antimatter asymmetry. A precise comparison of the properties of matter-antimatter partners represents a direct laboratory test of CPT invariance. At Harvard, Northwestern, and the CERN Antiproton Decelerator (AD), our effort is underway to precisely compare the magnetic moments of a single proton or antiproton in a Penning trap, as a test of CPT invariance in the baryon sector. Recent improvements to our Penning trap methods have opened the door to a sub-PPB comparison. In this talk I will describe the methods and motivations for a Penning trap magnetic moment measurement; the ongoing work at the AD; and the current status of the next-generation experimental effort at Harvard.