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Phys Rev Lett. 2004 Apr 23;92(16):161802. Epub 2004 Apr 23.

Measurement of the negative muon anomalous magnetic moment to 0.7 ppm.

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1
Brookhaven National Laboratory, Upton, New York 11973, USA.

Abstract

The anomalous magnetic moment of the negative muon has been measured to a precision of 0.7 ppm (ppm) at the Brookhaven Alternating Gradient Synchrotron. This result is based on data collected in 2001, and is over an order of magnitude more precise than the previous measurement for the negative muon. The result a(mu(-))=11 659 214(8)(3) x 10(-10) (0.7 ppm), where the first uncertainty is statistical and the second is systematic, is consistent with previous measurements of the anomaly for the positive and the negative muon. The average of the measurements of the muon anomaly is a(mu)(exp)=11 659 208(6) x 10(-10) (0.5 ppm).

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