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HK: Fachverband Physik der Hadronen und Kerne

HK 67: Fundamental Symmetries I

HK 67.1: Gruppenbericht

Donnerstag, 14. März 2024, 15:45–16:15, HBR 19: C 103

Improved measurement of the anomalous magnetic moment of the muon with 200ppb precision — •René Reimann, Mohammad Ubaidullah Hassan Qureshi, and Martin Fertl for the Muon g--2 collaboration — Institute of Physics and Cluster of Excellence PRISMA+, Johannes Gutenberg University Mainz, 55099 Mainz, Germany

The magnetic moment anomaly of the muon, that relates the cyclotron and spin precession frequency, provides one of the most stringent tests of the Standard Model of Particle Physics since it is measured and theoretically predicted to very high precision. In August 2023, the Fermilab Muon g-2 experiment reported its result from measurement campaigns 2 and 3 with an increased precision of now 200 ppb, which is both due to increased statistics and reduced systematics. This milestone puts the Muon g-2 experiment well on its way towards its design precision of 140 ppb with final statistics. In this talk we review the key improvements that lead to the reduction of uncertainty on Muon g-2 by a factor of about two and put the measurement in the context of the current theoretical understanding.

Keywords: Muon g-2; Muon Physics; Precision Physics; Magnetic Moment