Artikel ; Online: Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm.
2023 Band 131, Heft 16, Seite(n) 161802
Abstract: We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from the Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. We have analyzed more than 4 times the number of positrons from muon decay than in our ... ...
Abstract | We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from the Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. We have analyzed more than 4 times the number of positrons from muon decay than in our previous result from 2018 data. The systematic error is reduced by more than a factor of 2 due to better running conditions, a more stable beam, and improved knowledge of the magnetic field weighted by the muon distribution, ω[over ˜]_{p}^{'}, and of the anomalous precession frequency corrected for beam dynamics effects, ω_{a}. From the ratio ω_{a}/ω[over ˜]_{p}^{'}, together with precisely determined external parameters, we determine a_{μ}=116 592 057(25)×10^{-11} (0.21 ppm). Combining this result with our previous result from the 2018 data, we obtain a_{μ}(FNAL)=116 592 055(24)×10^{-11} (0.20 ppm). The new experimental world average is a_{μ}(exp)=116 592 059(22)×10^{-11} (0.19 ppm), which represents a factor of 2 improvement in precision. |
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Sprache | Englisch | |||||
Erscheinungsdatum | 2023-11-05 | |||||
Erscheinungsland | United States | |||||
Dokumenttyp | Journal Article | |||||
ZDB-ID | 208853-8 | |||||
ISSN | 1079-7114 ; 0031-9007 | |||||
ISSN (online) | 1079-7114 | |||||
ISSN | 0031-9007 | |||||
DOI | 10.1103/PhysRevLett.131.161802 | |||||
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Datenquelle | MEDical Literature Analysis and Retrieval System OnLINE |
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