Precise Measurement of Anomalous Magnetic Moment of Muon

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  • MIBE Tsutomu
    Institute of Particle and Nuclear Studies, KEK, I-1 Oho, Tsukuba 305-0801

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  • ミュオン異常磁気能率<i>g</i>–2の超精密測定

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<p>Muon is one of elementary particles, called lepton, with spin 1/2. Muon's spin interacts with magnetic and electric fields through its dipole moments. The anomalous magnetic (dipole) moment is calculated in the theory of particle physics, called the standard model, with a precision better than 0.5 parts-per-million. The past experiment indicated that the measured anomalous magnetic moment of muon is larger than the theoretical prediction. There has been a long-standing discussion that this anomaly might be a signature of new physics beyond the standard model. A new experiment with a novel technique of accelerating cold muon beam is under preparation in Japan. In this article, a concise review of anomalous magnetic moment of muon is given.</p>

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