Measurement of the Electron Magnetic Moment

被引：95
作者：
Fan, X. [1 ,2 ]
Myers, T. G. [2 ]
Sukra, B. A. D. [2 ]
Gabrielse, G. [2 ]
机构：
[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
[2] Northwestern Univ, Ctr Fundamental Phys, Dept Phys & Astron, Evanston, IL 60208 USA
来源：
PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 07期
基金：
美国国家科学基金会;
关键词：
INFLATIONARY UNIVERSE SCENARIO; CYCLOTRON MOTION; MICROWAVE CAVITY; MUON; ALPHA(3); FLATNESS; HORIZON; MODELS; ION; G-2;
D O I：
10.1103/PhysRevLett.130.071801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The electron magnetic moment, -mu=mu B = g=2 = 1.001 159 652 180 59 (13) [0.13 ppt], is determined 2.2 times more accurately than the value that stood for fourteen years. The most precisely determined property of an elementary particle tests the most precise prediction of the standard model (SM) to 1 part in 1012. 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 ppb] with an uncertainty 10 times smaller than the current disagreement between measured alpha values.
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页数：6
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