Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm.

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Aguillard, DP, Albahri, T, Allspach, D, Anisenkov, A, Badgley, K, Baeßler, S, Bailey, I, Bailey, L, Baranov, VA, Barlas-Yucel, E et al (show 182 more authors) , Barrett, T, Barzi, E, Bedeschi, F, Berz, M, Bhattacharya, M, Binney, HP, Bloom, P, Bono, J, Bottalico, E ORCID: 0000-0003-2238-8803, Bowcock, T ORCID: 0000-0002-3505-6915, Braun, S, Bressler, M, Cantatore, G, Carey, RM, Casey, BCK, Cauz, D, Chakraborty, R, Chapelain, A, Chappa, S, Charity, S ORCID: 0000-0003-0322-933X, Chen, C, Cheng, M, Chislett, R, Chu, Z, Chupp, TE, Claessens, C, Convery, ME, Corrodi, S, Cotrozzi, L ORCID: 0000-0002-0375-0611, Crnkovic, JD, Dabagov, S, Debevec, PT, Di Falco, S, Di Sciascio, G, Drendel, B, Driutti, A, Duginov, VN, Eads, M, Edmonds, A, Esquivel, J, Farooq, M, Fatemi, R, Ferrari, C, Fertl, M, Fienberg, AT, Fioretti, A, Flay, D, Foster, SB, Friedsam, H, Froemming, NS, Gabbanini, C, Gaines, I, Galati, MD, Ganguly, S, Garcia, A, George, J, Gibbons, LK, Gioiosa, A, Giovanetti, KL, Girotti, P, Gohn, W, Goodenough, L, Gorringe, T, Grange, J, Grant, S, Gray, F, Haciomeroglu, S, Halewood-Leagas, T, Hampai, D, Han, F, Hempstead, J, Hertzog, DW, Hesketh, G, Hess, E, Hibbert, A, Hodge, Z, Hong, KW, Hong, R, Hu, T, Hu, Y, Iacovacci, M, Incagli, M, Kammel, P, Kargiantoulakis, M, Karuza, M, Kaspar, J, Kawall, D, Kelton, L, Keshavarzi, A, Kessler, DS, Khaw, KS, Khechadoorian, Z, Khomutov, NV, Kiburg, B, Kiburg, M, Kim, O, Kinnaird, N, Kraegeloh, E, Krylov, VA, Kuchinskiy, NA, Labe, KR, LaBounty, J, Lancaster, M, Lee, S, Li, B, Li, D, Li, L, Logashenko, I, Lorente Campos, A, Lu, Z, Lucà, A, Lukicov, G, Lusiani, A, Lyon, AL, MacCoy, B, Madrak, R, Makino, K, Mastroianni, S, Miller, JP, Miozzi, S, Mitra, B, Morgan, JP, Morse, WM, Mott, J, Nath, A, Ng, JK, Nguyen, H, Oksuzian, Y, Omarov, Z, Osofsky, R, Park, S, Pauletta, G, Piacentino, GM, Pilato, RN ORCID: 0000-0002-4325-7530, Pitts, KT, Plaster, B, Počanić, D, Pohlman, N, Polly, CC, Price, J ORCID: 0000-0002-1435-5449, Quinn, B, Qureshi, MUH, Ramachandran, S, Ramberg, E, Reimann, R, Roberts, BL, Rubin, DL, Santi, L, Schlesier, C, Schreckenberger, A, Semertzidis, YK, Shemyakin, D, Sorbara, M, Stöckinger, D, Stapleton, J, Still, D, Stoughton, C, Stratakis, D, Swanson, HE, Sweetmore, G, Sweigart, DA, Syphers, MJ, Tarazona, DA, Teubner, T ORCID: 0000-0002-0680-0776, Tewsley-Booth, AE, Tishchenko, V, Tran, NH, Turner, W, Valetov, E, Vasilkova, D ORCID: 0000-0001-8704-3254, Venanzoni, G ORCID: 0000-0002-3525-476X, Volnykh, VP, Walton, T, Weisskopf, A, Welty-Rieger, L, Winter, P, Wu, Y, Yu, B, Yucel, M, Zeng, Y, Zhang, C ORCID: 0000-0001-9167-2715 and Muon <math xmlns="http://www.w3.org/1998/Math/MathML" display="i (2023) Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm. Physical review letters, 131 (16). p. 161802. ISSN 0031-9007, 1079-7114

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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.

Item Type:	Article
Uncontrolled Keywords:	Muon <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>g</mi><mo>−</mo><mn>2</mn></math> Collaboration
Divisions:	Faculty of Science & Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	09 Jan 2024 10:44
Last Modified:	24 Apr 2026 19:36
DOI:	10.1103/physrevlett.131.161802
Open Access URL:	https://journals.aps.org/prl/abstract/10.1103/Phys...
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3177763
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