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A precise measurement of the anomalous g value, a(mu) = (g-2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron. The result a(mu+) = 11 659 202(14) (6) x 10(-10) (1.3 ppm) is in good agreement with previous measurements and has an error one third that of the combined previous data. The current theoretical value from(More)
b The muon (g−2) experiment at Brookhaven National Laboratory has measured the anomalous magnetic moment of the positive muon with a precision of 0.7 ppm. This paper presents that result, concentrating on some of the important experimental issues that arise in extracting the anomalous precession frequency from the data. The spin of the muon generates a(More)
Using 11.6 pb of data collected in the energy range 0.864-1.06 GeV by CMD-2 at VEPP-2M, the rare decay mode φ → ηγ was observed via the decay chain η → π+π−η, η → π+π−π0 or η → π+π−γ. The following branching ratio was obtained: Br(φ → ηγ) = (4.9 −1.8 ± 0.6) · 10 −5 .
We present the final report from a series of precision measurements of the muon anomalous magnetic moment, aμ = (g − 2)/2. The details of the experimental method, apparatus, data taking, and analysis are summarized. Data obtained at Brookhaven National Laboratory, using nearly equal samples of positive and negative muons, were used to deduce aμ(Expt) = 11(More)
News from the Muon (g-2) Experiment at BNL M. Deile for the Muon (g-2) Collaboration: G.W. Bennett, B. Bousquet, H.N. Brown, G. Bunce, R.M. Carey, P. Cushman, G.T. Danby, P.T. Debevec, M. Deile, H. Deng, W. Deninger, S.K. Dhawan, V.P. Druzhinin, L. Duong, E. Efstathiadis, F.J.M. Farley, G.V. Fedotovich, S. Giron, F. Gray, D. Grigoriev, M. Große-Perdekamp,(More)
A higher precision measurement of the anomalous g value, a(mu)=(g-2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron, based on data collected in the year 2000. The result a(mu(+))=11 659 204(7)(5)x10(-10) (0.7 ppm) is in good agreement with previous measurements and has an error about one-half that of the combined(More)
We propose to measure the muon anomalous magnetic moment, aμ , to 0.14 ppm—a fourfold improvement over the 0.54 ppm precision obtained in the Brookhaven E821 experiment. The muon anomaly is a fundamental quantity and its precise determination will have lasting value. The current measurement was statistics limited, suggesting that greater precision can be(More)
The Muon (g − 2) Experiment (E821) at Brookhaven National Laboratory (BNL) has measured the anomalous magnetic moment of the positive muon to an unprecedented precision of 1.3 parts per million. The result, aμ+ = g−2 2 = 11 659 202(14)(6) × 10, is based on data recorded in 1999 and is in good agreement with previous measurements. Upcoming analysis of data(More)
The muon g-2 experiment at Brookhaven National Laboratory measures the anomalous magnetic moment of the muon, aμ, very precisely. This measurement tests the Standard Model. The analysis for the data collected in 2000 (a μ run) is completed and the accuracy on aμ is improved to 0.7 ppm, including statistical and systematic errors. The data analysis was(More)
The spin precession frequency of muons stored in the (g-2) storage ring has been analyzed for evidence of Lorentz and CPT violation. Two Lorentz and CPT violation signatures were searched for a nonzero delta omega a(=omega a mu+ - omega a mu-) and a sidereal variation of omega a mu+/-). No significant effect is found, and the following limits on the(More)