Phys. Rev. Lett.
82,
1632–1635
(1999)
New Measurement of the Anomalous Magnetic Moment of the Positive Muon
R. M. Carey et al.
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R. M. Carey1, W. Earle1, E. Efstathiadis1, M. F. Hare1, E. S. Hazen1, B. J. Hughes1, F. Krienen1, J. P. Miller1, V. Monich1, J. Ouyang1, O. Rind1, B. L. Roberts1, L. R. Sulak1, A. Trofimov1, G. Varner1, W. A. Worstell1, E. Benedict1, I. Logashenko1,3, J. Benante2, H. N. Brown2, G. Bunce2, J. Cullen2, G. T. Danby2, J. Geller2, H. Hseuh2, J. W. Jackson2, L. Jia2, S. Kochis2, R. Larsen2, Y. Y. Lee2, M. Mapes2, W. Meng2, W. M. Morse2, C. Pai2, C. Pearson2, I. Polk2, R. Prigl2, S. Rankowitz2, J. Sandberg2, Y. K. Semertzidis2, R. Shutt2, L. Snydstrup2, A. Soukas2, A. Stillman2, T. Tallerico2, M. Tanaka2,*, F. Toldo2, D. von Lintig2, D. Warburton2, K. Woodle2, A. Chertovskikh3, V. P. Druzhinin3, G. V. Fedotovich3, D. N. Grigorev3, V. B. Golubev3, B. I. Khazin3, A. Maksimov3, Yu. Merzliakov3,†, N. Ryskulov3, S. Serednyakov3, Yu. M. Shatunov3, E. Solodov3, Y. Orlov4, D. Winn5, A. Grossmann6, J. Gerhaeuser6, K. Jungmann6, P. von Walter6, G. zu Putlitz6, B. Bunker7, W. Deninger7, P. T. Debevec7, D. W. Hertzog7, T. D. Jones7, C. Polly7, S. Sedykh7, D. Urner7, U. Haeberlen8, K. Endo9, H. Hirabayashi9, S. Kurokawa9, A. Yamamoto9, M. A. Green10, P. Cushman11, J. Kindem11, L. Duong11, S. Giron11, R. McNabb11, D. Miller11, C. Timmermans11, D. Zimmerman11, Y. Mizumachi12, M. Iwasaki13, H. E. Ahn14, H. Deng14, S. K. Dhawan14, A. Disco14, F. J. M. Farley14, X. Fei14, M. Grosse-Perdekamp14, V. W. Hughes14, D. Kawall14, S. I. Redin14, and A. Steinmetz14
1Department of Physics, Boston University, Boston, Massachusetts 02215
2Brookhaven National Laboratory, Upton, New York 11973
3Budker Institute of Nuclear Physics, Novosibirsk, Russia
4Newman Laboratory, Cornell University, Ithaca, New York 14853
5Fairfield University, Fairfield, Connecticut 06430
6Physikalisches Institut der Universität Heidelberg, 69120 Heidelberg, Germany
7Physics Department, University of Illinois at Urbana-Champaign, Urbana-Champaign, Illinois 61801
8MPI für Medizinische Forschung, 69120 Heidelberg, Germany
9KEK, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
10Lawrence Berkeley National Laboratory, Berkeley, California 94720
11Department of Physics, University of Minnesota, Minneapolis, Minnesota 55455
12Science University of Tokyo, Tokyo, Japan
13Tokyo Institute of Technology, Tokyo, Japan
14Department of Physics, Yale University, New Haven, Connecticut 06511
Received 12 October 1998; published in the issue dated 22 February 1999
The muon anomalous magnetic moment has been measured in a new experiment at Brookhaven. Polarized muons were stored in a superferric ring, and the angular frequency difference, ωa, between the spin precession and orbital frequencies was determined by measuring the time distribution of high-energy decay positrons. The ratio R of ωa to the Larmor precession frequency of free protons, ωp, in the storage-ring magnetic field was measured. We find R = 3.707220(48)×10-3. With μμ/μp = 3.18334547(47) this gives aμ+ = 1165925(15)×10-9 ( ±13ppm), in good agreement with the previous CERN measurements for μ+ and μ- and of approximately the same precision.
© 1999 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.1632
DOI:
10.1103/PhysRevLett.82.1632
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