Progress towards improved precision of the electron and positron magnetic moment measurement
POSTER
Abstract
The measurement of the electron magnetic moment, measured to a precision of 0.28 ppt [1], gives one of the most stringent tests of the standard model, with an intriguing discrepancy of 2.4 standard deviations between the measurement and the prediction [2,3]. An apparatus has been developed~which reduces the effects from external magnetic and vibration noise, thought to have caused the largest systematic uncertainty in the previous measurement. These advances and new techniques are aimed at~obtaining a measurement an order of magnitude more precise [4]. Positrons from a student safe source will be used to measure the positron magnetic moment two orders of magnitude more precisely and give the most precise lepton test of CPT invariance.~ 1. D. Hanneke, S. Fogwell, and G. Gabrielse,~Physical Review Letters~100~(2008) 120801 2. T. Aoyama, T. Kinoshita, M. Nio, Atoms 7 (2019) 28. 3. R. H. Parker,~C. Yu,~W. Zhong, B. Estey, and H. M\"{u}ller,~Science~360~(2018) 191 4. G. Gabrielse, S. E. Fayer, T.G. Myers, X. Fan, Atoms 7 (2019) 45.~~
*Supported by the National Science Foundation.