Testing CPT with antiprotonic helium and antihydrogen: The ASACUSA experiment at CERN-AD

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2005

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Abstract: (Elsevier)
The precision spectroscopy of antiprotonic helium has steadily advanced in recent years, yielding a CPT test of the difference of antiproton and proton charge and mass of < 10 ppb. Experiments with a new laser system currently under way promise to improve the accuracy by a factor 5–10. An experiment being developed to measure the hyperfine splitting of antihydrogen is described.