Precise laser spectroscopy of the antiprotonic helium atom and CPT test on antiproton mass and charge

H. Yamaguchi, J. Eades, R. S. Hayano, M. Hori, D. Horváth, T. Ishikawa, B. Juhász, J. Sakaguchi, H. A. Torii, E. Widmann, T. Yamazaki

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Abstract

We have measured twelve transition frequencies of the antiprotonic helium atom p̄He+) with precisions of 0.1-0.2 ppm using a laser spectroscopic method. The agreement between the experiment and theories was so good that we can put a limit on the proton-antiproton mass (or charge) difference. The new limit is expected to be much smaller than the already published value, 60 ppb (6 × 10-8).

Original languageEnglish
Pages (from-to)C473-C476
JournalNuclear Physics A
Volume721
DOIs
Publication statusPublished - Jun 30 2003

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Yamaguchi, H., Eades, J., Hayano, R. S., Hori, M., Horváth, D., Ishikawa, T., Juhász, B., Sakaguchi, J., Torii, H. A., Widmann, E., & Yamazaki, T. (2003). Precise laser spectroscopy of the antiprotonic helium atom and CPT test on antiproton mass and charge. Nuclear Physics A, 721, C473-C476. https://doi.org/10.1016/S0375-9474(03)01102-3