Mainz 2017 – scientific programme

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SYAM: Symposium Atomic Anti-Matter Physics

SYAM 2: Atomic Anti-Matter Physics II

SYAM 2.1: Invited Talk

Thursday, March 9, 2017, 14:30–15:00, P 1

Muon g-2 — •Klaus Jungmann — Van Swinderen Institute, University of Groningen, The Netherlands

The magnetic anomaly of the muon has been measured to o.54ppm at the Brookhaven National Laboratory, USA. The theoretical value of this quantity has been calculated using several approaches which have converged at a value which differs from the experimental result by about 3.5 standard deviations. In order to clarify whether a significant difference ( >5 standard deviations) exists an improved experiment is underway at the Fermi National Laboratory, USA. It uses in all essential parts the same approach and technological concepts, in particular the very same storage ring of 7m radius in which muons at magic momentum are stored in 1.45 Tesla magnetic field. At J-PARC, Japan, a second experiment is underway. It uses different rather technology in many essential parts, in particular higher magnetic field and a much smaller radius magnet. The perspectives for both experiments will be discussed together with the possible implications of a measurement at higher accuracy.