New measurement of the electron magnetic moment and the fine structure constant.

By D. Hanneke, S. Fogwell, G. Gabrielse. Physical Review Letters, 2006

927 citations recorded by the source corpus.

A measurement using a one-electron quantum cyclotron gives the electron magnetic moment in Bohr magnetons, g/2=1.001 159 652 180 73 (28) [0.28 ppt], with an uncertainty 2.7 and 15 times smaller than for previous measurements in 2006 and 1987. The electron is used as a magnetometer to allow line shape statistics to accumulate, and its spontaneous emission rate determines the correction for its interaction with a cylindrical trap cavity. The new measurement and QED theory determine the fine structure constant, with alpha{-1}=137.035 999 084 (51) [0.37 ppb], and an uncertainty 20 times smaller than for any independent determination of alpha.

Subfields: Atomic and Molecular Physics, and Optics, Radiation

View Paper: https://www.semanticscholar.org/paper/f3b69d73af7b976526779334172d1dba077c0a66

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Citations in the corpus

Search for New Physics with Atoms and Molecules (2017, methodology): “The most accurate measurement of ae was carried out with a single electron that was suspended for months at a time in a cylindrical Penning trap (Hanneke et al., 2008).”
Theory of the Anomalous Magnetic Moment of the Electron (2019, background): “Their result was [50] a e ( expt.”
The PVLAS experiment: A 25 year effort to measure vacuum magnetic birefringence (2020, background): “Today Quantum Electrodynamics (QED) describes electrodynamics to an incredibly accurate level having been tested in many different systems at a microscopic level: (g − 2)e,μ [1, 2], Lamb-shift [3], Delbrück scattering [4] etc.”
Limiting two-Higgs-doublet models (2014, background): “However, as discussed in [79], in the last few years the situation has been changing thanks to several theoretical [80] and experimental [81] advancements in the determination of ae”
Highly charged ions: Optical clocks and applications in fundamental physics (2018, methodology): “In the first method, the experimental value of the free-electron magnetic-moment anomaly ae (Mohr et al., 2016, 2012) is measured in a Penning trap (Hanneke et al., 2008) and combined with exact QED calculations that include electroweak and hadronic contributions using expansions in powers series…”
Quantum-Spacetime Phenomenology (2008, methodology): “A powerful way to illustrate this success is provided by comparing the results of atom-recoil measurements of Δν/[ν*(ν*+ p/h)] and of measurements [277] of α(2), the square of the fine structure constant.”
Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm. (2021, background): “netic anomaly has been measured to fractions of a part per billion [46], the relative contribution of virtual heavy particles in many cases scales as (mμ/me) 2 ' 43, 000.”
Antinuclei in heavy-ion collisions (2018, background): “The tests represented here involve the mass difference between K0 and K 0 [58, 59], the g-2 for the positron [60, 61, 62] and muon [63, 64], the charge-to-mass ratio and g-factor of the antiproton [65, 66], and two forthcoming comparisons between neutral atoms of antihydrogen and hydrogen [67]: the ”