Physics – High Energy Physics
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf..463c&link_type=abstract
HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi
Physics
High Energy Physics
Scientific paper
The anomalous magnetic moment of the muon has been measured to 0.5 ppm in a series of precision experiments at the Brookhaven Alternating Gradient Synchrotron. The individual results for each polarity: aμ + = 11 659 204(7)(5)×10-10 and aμ - = 11 659 214(8)(3) × 10-10 are consistent with each other, so that we can write the average anomaly as aμ(exp) = 11 659 208(6) × 10-10 (0.5 ppm). A discrepancy, Δaμ, between the measured value aμ(exp) and the Standard Model aμ(SM) would be a signal for new physics. Currently the standard model prediction is calculated to 0.6 ppm precision and is dominated by the uncertainty of the hadronic contributions. We expect that the error on aμ(SM) will be reduced by a factor of two within the next decade, which, when combined with another experimental run at BNL, would put serious constraints on dark matter and supersymmetry.
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