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A naturally occurring trap for antiprotons

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Abstract

The phenomenon of delayed annihilation of antiprotons in helium is the first instance of a naturally occurring trap for antimatter in ordinary matter. Recent studies of this effect at CERN are summarised, and plans are described for laser excitation experiments to test its interpretation in terms of metastable exotic helium atom formation.

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Authors and Affiliations

  1. CERN, CH-1211, Geneva 12, Switzerland

    J. Eades

  2. Institute for Moleclar Science, Myodaiji, 444, Okazaki, Japan

    N. Morita

  3. Department of Physics and Meson Science Laboratory, University of Tokyo, Bunkyo-ku, 113, Tokyo, Japan

    T. M. Ito, Y. Ito, A. Kawachi, S. N. Nakamura, R. S. Hayano, M. Iwasaki, K. Shigaki & H. Tamura

  4. Institute for Nuclear Study, University of Tokyo, Tanashi, 188, Tokyo, Japan

    I. Sugai, E. Widmann & T. Yamazaki

  5. Tokyo Institute of Technology, Tokyo, Japan

    W. Higemoto & N. Nishida

  6. Physik Department, Technische Universität München, D-8046, Garching, Germany

    F. J. Hartmann, H. Daniel, T. von Egidy, P. Hofmann & Y. -S. Kim

Authors
  1. J. Eades
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  2. N. Morita
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  3. T. M. Ito
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  4. Y. Ito
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  5. A. Kawachi
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  6. S. N. Nakamura
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  7. R. S. Hayano
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  8. M. Iwasaki
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  9. K. Shigaki
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  10. H. Tamura
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  11. I. Sugai
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  12. E. Widmann
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  13. T. Yamazaki
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  14. W. Higemoto
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  15. N. Nishida
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  16. F. J. Hartmann
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  17. H. Daniel
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  18. T. von Egidy
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  19. P. Hofmann
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  20. Y. -S. Kim
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Eades, J., Morita, N., Ito, T.M. et al. A naturally occurring trap for antiprotons. Hyperfine Interact 81, 227–237 (1993). https://doi.org/10.1007/BF00567268

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  • DOI: https://doi.org/10.1007/BF00567268

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