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Journal Article

New measurement of the anomalous magnetic moment of the positive muon


Haeberlen,  U.
Research Group Prof. Dr. Haeberlen, Max Planck Institute for Medical Research, Max Planck Society;

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Carey, R. M., Earle, W., Efstathiadis, E., Hare, M. F., Hazen, E. S., Hughes, B. J., et al. (1999). New measurement of the anomalous magnetic moment of the positive muon. Physical Review Letters, 82(8), 1632-1635. doi:10.1103/PhysRevLett.82.1632.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-AA17-B
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, omegaa, between the spin precession and orbital frequencies was determined by measuring the time distribution of high-energy decay positrons. The ratio R of omegaa to the Larmor precession frequency of free protons, omegap, in the storage-ring magnetic field was measured. We find R = 3.707 220(48) 103. With /p = 3.183 345 47(47) this gives a+ = 1 165 925(15) 109 (13 ppm), in good agreement with the previous CERN measurements for + and and of approximately the same precision