New determination of the fine structure constant from the electron g value and QED

G. Gabrielse*, D. Hanneke, T. Kinoshita, M. Nio, B. Odom

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

218 Scopus citations

Abstract

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=137.035999710(96)â€â€[0.70ppb]. 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.

Original languageEnglish (US)
Article number030802
JournalPhysical review letters
Volume97
Issue number3
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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