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Journal Article

Double-trap measurement of the proton magnetic moment at 0.3 parts per billion precision.

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Bohman,  Matthew
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;
RIKEN, Ulmer Fundamental Symmetries Laboratory, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;

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Harrington,  J.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Blaum,  Klaus
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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http://science.sciencemag.org/content/358/6366/1081
(Publisher version)

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Citation

Schneider, G., Mooser, A., Bohman, M., Schön, N., Harrington, J., Higuchi, T., et al. (2017). Double-trap measurement of the proton magnetic moment at 0.3 parts per billion precision. Science, 358(6366), 1081-1084. doi:10.1126/science.aan0207.


Cite as: https://hdl.handle.net/21.11116/0000-0000-621B-4
Abstract
Precise knowledge of the fundamental properties of the proton is essential for our understanding of atomic structure as well as for precise tests of fundamental symmetries. We report on a direct high-precision measurement of the magnetic moment μp of the proton in units of the nuclear magneton μN. The result, μp = 2.79284734462 (±0.00000000082) μN, has a fractional precision of 0.3 parts per billion, improves the previous best measurement by a factor of 11, and is consistent with the currently accepted value. This was achieved with the use of an optimized double–Penning trap technique. Provided a similar measurement of the antiproton magnetic moment can be performed, this result will enable a test of the fundamental symmetry between matter and antimatter in the baryonic sector at the 10−10 level.