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Observation of the decay η → π0γγ

Наблюдение распада η → π0γγ

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Il Nuovo Cimento A (1965-1970)

Summary

The rare radiative decay η → π0γγ has been effectively observed and studied at the 70 GeV IHEP accelerator with the hodoscope spectrometer GAMS-2000. The branching ratio for this decay is found to be Br(η → π0γγ) = (9.5 ± 2.3)-10-4.

Riassunto

Si è osservato e studiato in maniera efficace il raro decadimento radiativo η → π0γγ all’ acceleratore di 70 GeV IHEP con lo spettrometro dell’odoscopio GAMS-2000. Si è trovato un rapporto di ramificazione per questo decadimento pari a BR(η → π0γγ) = = (9.5 ± 2.3)-10-4.

Резюме

Был эффективно зарегистрирован и исследован редкий радиационный распад η → π0γγ на ускорителе IHEP 70 ГэВ с помощью спектрометра GAMS-2000. Получено, что отношение ветвей для этого распада составляет ВR(η → π0γγ) == =(9.5 ±2.3)·10-4.

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Authors and Affiliations

  1. Joint Experiment of IHEP, Serpukhov, USSR

    F. Binon, C. Bricman, V. A. Davydov, S. V. Donskov, J. Dufournaud, P. Duteil, M. Gouanère, A. V. Inyakin, V. A. Kachanov, D. B. Kakauridze, G. V. Khaustov, A. V. Kulik, J. P. Lagnaux, A. A. Lednev, Yu. V. Mikhailov, J. P. Peigneux, Yu. D. Prokoshkin, Yu. V. Rodnov, S. A. Sadovsky, A. V. Singovsky, A. V. Starzev, J. P. Stroot & V. P. Sugonyaev

  2. CERN, Geneva, Switzerland

    F. Binon, C. Bricman, V. A. Davydov, S. V. Donskov, J. Dufournaud, P. Duteil, M. Gouanère, A. V. Inyakin, V. A. Kachanov, D. B. Kakauridze, G. V. Khaustov, A. V. Kulik, J. P. Lagnaux, A. A. Lednev, Yu. V. Mikhailov, J. P. Peigneux, Yu. D. Prokoshkin, Yu. V. Rodnov, S. A. Sadovsky, A. V. Singovsky, A. V. Starzev, J. P. Stroot & V. P. Sugonyaev

  3. Institute for High Energy Physics, Serpukhov, USSR

    V. A. Davydov, S. V. Donskov, P. Duteil, A. V. Inyakin, V. A. Kachanov, D. B. Kakauridze, G. V. Khaustov, A. V. Kulik, A. A. Lednev, Yu. V. Mikhailov, Yu. D. Prokoshkin, Yu. V. Rodnov, S. A. Sadovsky, A. V. Singovsky, A. V. Starzev & V. P. Sugonyaev

  4. Institute Interuniversitaire des Sciences Nucléaires, Brussels, Belgium

    F. Binon, C. Bricman, J. P. Lagnaux & J. P. Stroot

  5. Laboratoire d’Annecy de Physique des Particules, France

    J. Dufournaud, M. Gouanère & J. P. Peigneux

Authors
  1. F. Binon
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  2. C. Bricman
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  3. V. A. Davydov
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  4. S. V. Donskov
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  5. J. Dufournaud
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  6. P. Duteil
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  7. M. Gouanère
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  8. A. V. Inyakin
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  9. V. A. Kachanov
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  10. D. B. Kakauridze
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  11. G. V. Khaustov
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  12. A. V. Kulik
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  13. J. P. Lagnaux
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  14. A. A. Lednev
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  15. Yu. V. Mikhailov
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  16. J. P. Peigneux
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  17. Yu. D. Prokoshkin
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  18. Yu. V. Rodnov
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  19. S. A. Sadovsky
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  20. A. V. Singovsky
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  21. A. V. Starzev
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  22. J. P. Stroot
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  23. V. P. Sugonyaev
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Binon, F., Bricman, C., Davydov, V.A. et al. Observation of the decay η → π0γγ. Nuov Cim A 71, 497–508 (1982). https://doi.org/10.1007/BF02770988

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  • DOI: https://doi.org/10.1007/BF02770988

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