Improved measurement of the positive muon anomalous magnetic moment

H. N. Brown*, G. Bunce, R. M. Carey, P. Cushman, G. T. Danby, P. T. Debevec, H. Deng, W. Deninger, S. K. Dhawan, V. P. Druzhinin, L. Duong, W. Earle, E. Efstathiadis, G. V. Fedotovich, F. J.M. Farley, S. Giron, F. Gray, M. Grosse-Perdekamp, A. Grossmann, U. HaeberlenM. F. Hare, E. S. Hazen, D. W. Hertzog, V. W. Hughes, M. Iwasaki, K. Jungmann, D. Kawall, M. Kawamura, B. I. Khazin, J. Kindem, F. Krienen, I. Kronkvist, R. Larsen, Y. Y. Lee, I. Logashenko, R. McNabb, W. Meng, J. Mi, J. P. Miller, W. M. Morse, C. J.G. Onderwater, Y. Orlov, C. Özben, C. Polly, C. Pai, J. M. Paley, J. Pretz, R. Prigl, G. Zu Putlitz, S. I. Redin, O. Rind, B. L. Roberts, N. Ryskulov, S. Sedykh, Y. K. Semertzidis, Yu M. Shatunov, E. Solodov, M. Sossong, A. Steinmetz, L. R. Sulak, C. Timmermans, A. Trofimov, D. Urner, P. Von Walter, D. Warburton, D. Winn, A. Yamamoto, D. Zimmerman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)


A new measurement of the positive muon's anomalous magnetic moment has been made at the Brookhaven Alternating Gradient Synchrotron using the direct injection of polarized muons into the superferric storage ring. The angular frequency difference ωa between the angular spin precession frequency ωs and the angular orbital frequency ωc is measured as well as the free proton NMR frequency ωp. These determine R =ωap=3.707 201(19)×10-3. With μμp=3.183 345 39(10) this gives aμ+=11 659 191(59)×10-10 (±5 ppm), in good agreement with the previous CERN and BNL measurements for μ+ and μ-, and with the standard model prediction.

Original languageEnglish
Article number091101
Pages (from-to)1-4
Number of pages4
JournalPhysical Review D
Issue number9
Publication statusPublished - 1 Nov 2000
Externally publishedYes


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