Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm
Creators: name: Aguillard, D. P.
name: Albahri, T.
name: Allspach, D.
name: Anisenkov, A.
name: Badgley, K.
name: Baeßler, S.
name: Bailey, I.
name: Bailey, L.
name: Baranov, V. A.
name: Barlas-Yucel, E.
name: Barrett, T.
name: Barzi, E.
name: Bedeschi, F.
name: Berz, M.
name: Bhattacharya, M.
name: Binney, H. P.
name: Bloom, P.
name: Bono, J.
name: Bottalico, E.
name: Bowcock, T.
name: Braun, S.
name: Bressler, M.
name: Cantatore, G.
name: Carey, R. M.
name: Casey, B. C. K.
name: Cauz, D.
name: Chakraborty, R.
name: Chapelain, A.
name: Chappa, S.
name: Charity, S.
name: Chen, C.
name: Cheng, M.
name: Chislett, R.
name: Chu, Z.
name: Chupp, T. E.
name: Claessens, C.
name: Convery, M. E.
name: Corrodi, S.
name: Cotrozzi, L.
name: Crnkovic, J. D.
name: Dabagov, S.
name: Debevec, P. T.
name: Di Falco, S.
name: Di Sciascio, G.
name: Drendel, B.
name: Driutti, A.
name: Duginov, V. N.
name: Eads, M.
name: Edmonds, A.
name: Esquivel, J.
name: Farooq, M.
name: Fatemi, R.
name: Ferrari, C.
name: Fertl, M.
name: Fienberg, A. T.
name: Fioretti, A.
name: Flay, D.
name: Foster, S. B.
name: Friedsam, H.
name: Froemming, N. S.
name: Gabbanini, C.
name: Gaines, I.
name: Galati, M. D.
name: Ganguly, S.
name: Garcia, A.
name: George, J.
name: Gibbons, L. K.
name: Gioiosa, A.
name: Giovanetti, K. L.
name: Girotti, P.
name: Gohn, W.
name: Goodenough, L.
name: Gorringe, T.
name: Grange, J.
name: Grant, S.
name: Gray, F.
name: Haciomeroglu, S.
name: Halewood-Leagas, T.
name: Hampai, D.
name: Han, F.
name: Hempstead, J.
name: Hertzog, D. W.
name: Hesketh, G.
name: Hess, E.
name: Hibbert, A.
name: Hodge, Z.
name: Hong, K. W.
name: Hong, R.
name: Hu, T.
name: Hu, Y.
name: Iacovacci, M.
name: Incagli, M.
name: Kammel, P.
name: Kargiantoulakis, M.
name: Karuza, M.
name: Kaspar, J.
name: Kawall, D.
name: Kelton, L.
name: Keshavarzi, A.
name: Kessler, D. S.
name: Khaw, K. S.
name: Khechadoorian, Z.
name: Khomutov, N. V.
name: Kiburg, B.
name: Kiburg, M.
name: Kim, O.
name: Kinnaird, N.
name: Kraegeloh, E.
name: Krylov, V. A.
name: Kuchinskiy, N. A.
name: Labe, K. R.
name: LaBounty, J.
name: Lancaster, M.
name: Lee, S.
name: Li, B.
name: Li, D.
name: Li, L.
name: Logashenko, I.
name: Campos, A. Lorente
name: Lu, Z.
name: Lucà, A.
name: Lukicov, G.
name: Lusiani, A.
name: Lyon, A. L.
name: MacCoy, B.
name: Madrak, R.
name: Makino, K.
name: Mastroianni, S.
name: Miller, J. P.
name: Miozzi, S.
name: Mitra, B.
name: Morgan, J. P.
name: Morse, W. M.
name: Mott, J.
name: Nath, A.
name: Ng, J. K.
name: Nguyen, H.
name: Oksuzian, Y.
name: Omarov, Z.
name: Osofsky, R.
name: Park, S.
name: Pauletta, G.
name: Piacentino, G. M.
name: Pilato, R. N.
name: Pitts, K. T.
name: Plaster, B.
name: Počanić, D.
name: Pohlman, N.
name: Polly, C. C.
name: Price, J.
name: Quinn, B.
name: Qureshi, M. U. H.
name: Ramachandran, S.
name: Ramberg, E.
name: Reimann, R.
name: Roberts, B. L.
name: Rubin, D. L.
name: Santi, L.
name: Schlesier, C.
name: Schreckenberger, A.
name: Semertzidis, Y. K.
name: Shemyakin, D.
name: Sorbara, M.
name: Stapleton, J.
name: Still, D.
name: Stöckinger, D.
name: Stoughton, C.
name: Stratakis, D.
name: Swanson, H. E.
name: Sweetmore, G.
name: Sweigart, D. A.
name: Syphers, M. J.
name: Tarazona, D. A.
name: Teubner, T.
name: Tewsley-Booth, A. E.
name: Tishchenko, V.
name: Tran, N. H.
name: Turner, W.
name: Valetov, E.
name: Vasilkova, D.
name: Venanzoni, G.
name: Volnykh, V. P.
name: Walton, T.
name: Weisskopf, A.
name: Welty-Rieger, L.
name: Winter, P.
name: Wu, Y.
name: Yu, B.
name: Yucel, M.
name: Zeng, Y.
name: Zhang, C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present a new measurement of the positive muon magnetic anomaly, $a_μ\equiv (g_μ- 2)/2$, 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, $\tildeω'^{}_p$, and of the anomalous precession frequency corrected for beam dynamics effects, $ω_a$. From the ratio $ω_a / \tildeω'^{}_p$, together with precisely determined external parameters, we determine $a_μ= 116\,592\,057(25) \times 10^{-11}$ (0.21 ppm). Combining this result with our previous result from the 2018 data, we obtain $a_μ\text{(FNAL)} = 116\,592\,055(24) \times 10^{-11}$ (0.20 ppm). The new experimental world average is $a_μ(\text{Exp}) = 116\,592\,059(22)\times 10^{-11}$ (0.19 ppm), which represents a factor of 2 improvement in precision.
description: 8 pages, 3 figures