New measurement of the electron magnetic moment using a one-electron quantum cyclotron

B. Odom*, D. Hanneke, B. D'urso, G. Gabrielse

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

250 Scopus citations

Abstract

A new measurement resolves cyclotron and spin levels for a single-electron quantum cyclotron to obtain an electron magnetic moment, given by g/2=1.00115965218085(76)[0.76ppt]. 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.

Original languageEnglish (US)
Article number030801
JournalPhysical review letters
Volume97
Issue number3
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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