TY - JOUR
T1 - Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm
AU - Aguillard, D. P.
AU - Albahri, T.
AU - Allspach, D.
AU - Anisenkov, A.
AU - Badgley, K.
AU - Baeßler, S.
AU - Bailey, I.
AU - Bailey, L.
AU - Baranov, V. A.
AU - Barlas-Yucel, E.
AU - Barrett, T.
AU - Barzi, E.
AU - Bedeschi, F.
AU - Berz, M.
AU - Bhattacharya, M.
AU - Binney, H. P.
AU - Bloom, P.
AU - Bono, J.
AU - Bottalico, E.
AU - Bowcock, T.
AU - Braun, S.
AU - Bressler, M.
AU - Cantatore, G.
AU - Carey, R. M.
AU - Casey, B. C.K.
AU - Cauz, D.
AU - Chakraborty, R.
AU - Chapelain, A.
AU - Chappa, S.
AU - Charity, S.
AU - Chen, C.
AU - Cheng, M.
AU - Chislett, R.
AU - Chu, Z.
AU - Chupp, T. E.
AU - Claessens, C.
AU - Convery, M. E.
AU - Corrodi, S.
AU - Cotrozzi, L.
AU - Crnkovic, J. D.
AU - Dabagov, S.
AU - Debevec, P. T.
AU - Di Falco, S.
AU - Di Sciascio, G.
AU - Drendel, B.
AU - Driutti, A.
AU - Duginov, V. N.
AU - Fatemi, R.
AU - Gorringe, T.
AU - Plaster, B.
N1 - Publisher Copyright:
© 2023 authors. Published by the American Physical Society.
PY - 2023/10/20
Y1 - 2023/10/20
N2 - We present a new measurement of the positive muon magnetic anomaly, aμ(gμ-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, p′, and of the anomalous precession frequency corrected for beam dynamics effects, ωa. From the ratio ωa/p′, together with precisely determined external parameters, we determine aμ=116 592 057(25)×10-11 (0.21 ppm). Combining this result with our previous result from the 2018 data, we obtain aμ(FNAL)=116 592 055(24)×10-11 (0.20 ppm). The new experimental world average is aμ(exp)=116 592 059(22)×10-11 (0.19 ppm), which represents a factor of 2 improvement in precision.
AB - We present a new measurement of the positive muon magnetic anomaly, aμ(gμ-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, p′, and of the anomalous precession frequency corrected for beam dynamics effects, ωa. From the ratio ωa/p′, together with precisely determined external parameters, we determine aμ=116 592 057(25)×10-11 (0.21 ppm). Combining this result with our previous result from the 2018 data, we obtain aμ(FNAL)=116 592 055(24)×10-11 (0.20 ppm). The new experimental world average is aμ(exp)=116 592 059(22)×10-11 (0.19 ppm), which represents a factor of 2 improvement in precision.
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U2 - 10.1103/PhysRevLett.131.161802
DO - 10.1103/PhysRevLett.131.161802
M3 - Article
C2 - 37925710
AN - SCOPUS:85175608272
SN - 0031-9007
VL - 131
JO - Physical Review Letters
JF - Physical Review Letters
IS - 16
M1 - 161802
ER -