Testing CPT symmetry with antiprotonic helium and antihydrogen
Testing CPT symmetry with antiprotonic helium and antihydrogen
复制标题
用反质子氦和反氢测试 CPT 对称性
DOI：
10.1063/1.3700612
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发表时间：
2012
影响因子：
2.2
通讯作者：
E. Widmann
中科院分区：
文献类型：
--
作者：
E. Widmann
ASACUSA合作正在瑞士日内瓦欧洲核子研究中心的反质子减速器（AD）对含有反质子的奇异原子进行精确的激光和微波光谱学研究。反质子氦是一个包含反质子、氦核和电子的三体系统，通过与最先进的三体QED计算进行比较，反质子氦的激光和微波光谱学得到了反质子电荷和质量的最精确的测定。作为下一个主要项目，ASACUSA正在进行反氢基态超精细结构的测量，这是一个非常精确的氢量。这些测量构成了对CPT基本理论在强子领域的最好检验。
The ASACUSA collaboration is performing precision laser and microwave spectroscopy of exotic atoms containing an antiproton at the Antiproton Decelerator (AD) of CERN, Geneva, Switzerland. The laser and microwave spectroscopy of antiprotonic helium, a three-body system containing an antiproton, a helium nucleus, and an electron, has - through comparison to state-of-the-art three-body QED calculations - yielded the most precise determination of the antiproton charge and mass. As a next major project, ASACUSA is pursuing a measurement of the ground-state hyperfine structure of antihydrogen, a quantity that is know for hydrogen to very high precision. These measurements constitute some of the best test of the fundamental CPT theory in the hadronic sector.