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Phys. Rev. Lett. 97, 030801 (2006) [4 pages]

New Measurement of the Electron Magnetic Moment Using a One-Electron Quantum Cyclotron

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B. Odom*, D. Hanneke, B. D’Urso†, and G. Gabrielse‡
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA

See Also: Erratum

Received 17 May 2006; published 17 July 2006

A new measurement resolves cyclotron and spin levels for a single-electron quantum cyclotron to obtain an electron magnetic moment, given by g/2=1.001 159 652 180 85 (76) [0.76  ppt]. The uncertainty is nearly 6 times lower than in the past, and g is shifted downward by 1.7 standard deviations. The new g, with a quantum electrodynamics (QED) calculation, determines the fine structure constant with a 0.7 ppb uncertainty—10 times smaller than for atom-recoil determinations. Remarkably, this 100 mK measurement probes for internal electron structure at 130 GeV.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.030801
DOI:
10.1103/PhysRevLett.97.030801
PACS:
06.20.Jr, 12.20.Fv, 13.40.Em, 14.60.Cd

*Present address: University of Chicago, Chicago, IL 60637, USA.

†Present address: Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.

‡Electronic address: gabrielse@physics.harvard.edu

See Also

Erratum: G. Gabrielse, D. Hanneke, T. Kinoshita, M. Nio, and B. Odom, Erratum: New Determination of the Fine Structure Constant from the Electron g Value and QED [Phys. Rev. Lett. 97, 030802 (2006)], Phys. Rev. Lett. 99, 039902 (2007).

 
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