Double-trap measurement of the proton magnetic moment at 0.3 parts per billion precision
Double-trap measurement of the proton magnetic moment at 0.3 parts per billion precision
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质子磁矩的双陷阱测量,精度为 0 3 ppb
DOI:
10.1126/science.aan0207
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发表时间:
2017
期刊:
影响因子:
56.9
通讯作者:
Matsuda
中科院分区:
文献类型:
--
作者:
Schneider;Mooser;Bohman;Schön;Harrington;Higuchi;Matsuda
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 μpof 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 10−10level.
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