Anomalous Magnetic Moment of the Muon and Search for New Physics

Abstract

Measurement of the anomalous magnetic moment of the muon is one of the most promising low-energy experiments which have sensitivity to new physics beyond the standard model. At present, the discrepancy between theory and experiment is reported to be about 2.7σ level, which may indicate a contribution from new physics, possibly from a supersymmetric theory. In this article I would like to explain how the theoretical prediction for muon g-2 is calculated, with a special emphasis on the hadronic contribution, which is most poorly known. I also discuss near future prospects for reducing theoretical uncertainties and implications for the minimal supersymmetric standard model.