[2209.13084] Measurement of the Electron Magnetic Moment
source link: https://arxiv.org/abs/2209.13084
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[Submitted on 27 Sep 2022 (v1), last revised 7 Dec 2022 (this version, v2)]
Measurement of the Electron Magnetic Moment
The electron magnetic moment,-\mu/\mu_B = g/2 = 1.001 \, 159 \, 652 \, 180 \, 59 \, (13) \, [0.13\, \rm{ppt}], is determined 2.2 times more accurately than the value that stood for 14 years. The most precisely determined property of an elementary particle tests the most precise prediction of the Standard Model (SM) to 1 part in 10^{12}. The test would improve an order of magnitude if the uncertainty from discrepant measurements of the fine structure constant \alpha is eliminated since the SM prediction is a function of \alpha. The new measurement and SM theory together predict \alpha^{-1}=137.035 \, 999 \, 166 \, (15) \, [0.11 \, \rm{ppb}] with an uncertainty ten times smaller than the current disagreement between measured \alpha values.
| Comments: | 6 pages, 5 figures |
| Subjects: | Atomic Physics (physics.atom-ph); High Energy Physics - Experiment (hep-ex); Quantum Physics (quant-ph) |
| Cite as: | arXiv:2209.13084 [physics.atom-ph] |
| (or arXiv:2209.13084v2 [physics.atom-ph] for this version) | |
| https://doi.org/10.48550/arXiv.2209.13084 | |
| Related DOI: |
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