Precision Measurement of the Anomalous Magnetic Moment of the Muon

Physics – High Energy Physics

Scientific paper

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Scientific paper

The present generation of measurements of the anomalous magnetic moment of the muon have reached sub part per million (ppm) precision, at which level they are not only sensitive to electromagnetic and hadronic interactions, but, for the first time, the electroweak interactions. Therefore comparing the experimental results with Standard Model evaluations provides stringent constraints on physics beyond our current model. From the latest measurements at Brookhaven National Laboratory, the anomalous magnetic moment is now known to within 0.5 ppm. These measurements have sparked much discussion in the physics community, as well as a re-examination of the theoretical evaluations of the anomaly. In 2001, measurements were made with negative muons that give aμ- to 0.7 ppm. I describe the theory, experiment, and analysis techniques used to determine aμ-.

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