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

Journal Article · Fri Jul 21 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.030801· OSTI ID:20860524

Odom, B; Hanneke, D; D'Urso, B; Gabrielse, G ^[1]

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1. Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)

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.

• OSTI ID: 20860524
• Journal Information: Physical Review Letters, Vol. 97, Issue 3; Other Information: DOI: 10.1103/PhysRevLett.97.030801; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ATOMS
CYCLOTRONS
ELECTRONS
FINE STRUCTURE
GEV RANGE 100-1000
MAGNETIC MOMENTS
QUANTUM ELECTRODYNAMICS
RECOILS
SPIN