Phys. Rev. Lett. 97, 030802 (2006) [4 pages]New Determination of the Fine Structure Constant from the Electron g Value and QEDSee Also: Erratum
Quantum electrodynamics (QED) predicts a relationship between the dimensionless magnetic moment of the electron (g) and the fine structure constant (α). A new measurement of g using a one-electron quantum cyclotron, together with a QED calculation involving 891 eighth-order Feynman diagrams, determine α-1=137.035 999 710 (96) [0.70 ppb]. The uncertainties are 10 times smaller than those of nearest rival methods that include atom-recoil measurements. Comparisons of measured and calculated g test QED most stringently, and set a limit on internal electron structure. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.030802
DOI:
10.1103/PhysRevLett.97.030802
PACS:
06.20.Jr, 12.20.Fv, 13.40.Em, 14.60.Cd
See AlsoErratum: 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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