title: New determination of the fine structure constant from the electron value and QED.
abstract: Quantum electrodynamics (QED) predicts a relationship between the dimensionless magnetic moment of the electron (g) and the fine structure constant (alpha). A new measurement of g using a one-electron quantum cyclotron, together with a QED calculation involving 891 eighth-order Feynman diagrams, determine alpha(-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.
authors.affiliation: Lyman Laboratory, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: G
authors.initials: G
authors.lastname: Gabrielse
authors.forename: D
authors.initials: D
authors.lastname: Hanneke
authors.forename: T
authors.initials: T
authors.lastname: Kinoshita
authors.forename: M
authors.initials: M
authors.lastname: Nio
authors.forename: B
authors.initials: B
authors.lastname: Odom