The muon anomalous magnetic moment measurement, when compared with theory, can be used to test many extensions to the standard model. The most recent measurement made by the Brookhaven E821 Collaboration reduces the uncertainty on the world average of aμ to 0.7 ppm, comparable in precision to theory. This paper describes the experiment and the current theoretical efforts to establish a correct standard model reference value for the muon anomaly.
Bibliographical noteFunding Information:
The (g-2) experiment is supported in part by the U.S. Department of Energy, the U.S. National Science Foundation, the German Bundesminister fiir Bildung und Forschung, the Russian Minsitry of Science, and the US-Japan Agreement in High Energy Physics. The author thanks his collaborators, and the organizers of PANIC’02 for an excellent meeting.