期刊
NATURE COMMUNICATIONS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms4089
关键词
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资金
- Japanese Ministry of Education, Culture, Sports, Science and Technology (Monbukakagu-sho) [24000008]
- Special Research Projects for Basic Science of RIKEN
- RIKEN FPR programme
- RIKEN IRU programme
- European Research Council under European Union [291242]
- Austrian Ministry of Science and Research
- Universita di Brescia
- Istituto Nazionale di Fisica Nucleare
- Grants-in-Aid for Scientific Research [24000008] Funding Source: KAKEN
- European Research Council (ERC) [291242] Funding Source: European Research Council (ERC)
Antihydrogen, a positron bound to an antiproton, is the simplest antiatom. Its counterpart-hydrogen-is one of the most precisely investigated and best understood systems in physics research. High-resolution comparisons of both systems provide sensitive tests of CPT symmetry, which is the most fundamental symmetry in the Standard Model of elementary particle physics. Any measured difference would point to CPT violation and thus to new physics. Here we report the development of an antihydrogen source using a cusp trap for in-flight spectroscopy. A total of 80 antihydrogen atoms are unambiguously detected 2.7 m downstream of the production region, where perturbing residual magnetic fields are small. This is a major step towards precision spectroscopy of the ground-state hyperfine splitting of antihydrogen using Rabi-like beam spectroscopy.
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