In-beam measurement of the hydrogen hyperfine splitting and prospects for antihydrogen spectroscopy

被引：29
|
作者：
Diermaier, M. [1 ]
Jepsen, C. B. [2 ,3 ]
Kolbinger, B. [1 ]
Malbrunot, C. [1 ,2 ]
Massiczek, O. [1 ]
Sauerzopf, C. [1 ]
Simon, M. C. [1 ]
Zmeskal, J. [1 ]
Widmann, E. [1 ]
机构：
[1] Austrian Acad Sci, Stefan Meyer Inst Subatomare Phys, Boltzmanngasse 3, A-1090 Vienna, Austria
[2] CERN, Expt Phys Dept, CH-1211 Geneva 23, Switzerland
[3] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA
来源：
NATURE COMMUNICATIONS | 2017年 / 8卷
基金：
欧洲研究理事会; 奥地利科学基金会;
关键词：
TRAPPED ANTIHYDROGEN; MAGNETIC-MOMENT; ATOMS; ANTIPROTON; TRANSITION; FREQUENCY; DEUTERIUM; PRECISION; CHARGE; MASER;
D O I：
10.1038/ncomms15749
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Antihydrogen, the lightest atom consisting purely of antimatter, is an ideal laboratory to study the CPT symmetry by comparison with hydrogen. With respect to absolute precision, transitions within the ground-state hyperfine structure (GS-HFS) are most appealing by virtue of their small energy separation. ASACUSA proposed employing a beam of cold antihydrogen atoms in a Rabi-type experiment, to determine the GS-HFS in a field-free region. Here we present a measurement of the zero-field hydrogen GS-HFS using the spectroscopy apparatus of ASACUSA's antihydrogen experiment. The measured value of nu(HF) = 1,420,405,748.4(3.4) (1.6) Hz with a relative precision of 2.7 x 10(-9) constitutes the most precise determination of this quantity in a beam and verifies the developed spectroscopy methods for the antihydrogen HFS experiment to the p.p.b. level. Together with the recently presented observation of antihydrogen atoms 2.7 m downstream of the production region, the prerequisites for a measurement with antihydrogen are now available within the ASACUSA collaboration.
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页数：9
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