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Search for narrow baryonia with negative and positive strangeness

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Zeitschrift für Physik C Particles and Fields

Abstract

A search for baryonia with negative and positive strangeness decaying respectively into\(\Lambda + \bar p + pions\) and\(\bar \Lambda + p + pions\) has been carried out in a neutron beam with a mean momentum of ≅40 GeV/c in an experiment performed at the Serpukhov accelerator. There is a strong indication of the existence of these baryonia. The following four charge states are observed for negative and positive strangeness: neutral, negative, positive and doubly charged. Their mean mass is 3055±25 MeV/c2 and the width Γ≦36±15 MeV/c2. The data show that the isotopic spin of the baryonia is ≧3/2. The baryonia production cross sections in the acceptable kinematic regionX F ≧0.2 andP T ≦1 GeV/c times the branching ratios of the observed decays are of the order of 1 μb per nucleon.

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Authors and Affiliations

  1. Joint Institute for Nuclear Research, Dubna, USSR

    A. N. Aleev, V. A. Arefiev, V. P. Balandin, V. K. Berdyshev, V. K. Birulev, A. S. Chvyrov, I. I. Evsikov, T. S. Grigalashvili, B. N. Gus'kov, I. M. Ivanchenko, M. N. Kapishin, N. N. Karpenko, D. A. Kirillov, I. G. Kosarev, N. A. Kuz'min, M. F. Likhachev, A. L. Lyubimov, A. N. Maksimov, P. V. Moisenz, A. N. Morozov, V. V. Pal'chik, A. V. Pose, T. B. Progulova, A. Prokes, V. V. Rybakov, L. A. Slepets & A. I. Zinchenko

  2. Institute of High Energy Physics of the Kaz.SSR Academy of Science, Alma-Ata, USSR

    A. F. Kamburyan, A. A. Loktionov, Yu. K. Potrebenikov & V. I. Skorobogatova

  3. Central Institute for Physics of the Hungarian Academy of Science, Budapes, Hungary

    I. Pazoni, I. Veress & P. Zalan

  4. Lebedev Physical Institute of the USSR Academy of Science, Moscow, USSR

    A. S. Belousov, E. G. Devitsin, A. M. Fomenko, V. A. Kozlov, E. I. Malinovsky, S. Yu. Potashev, S. V. Rusakov, P. A. Smirnov, Yu. V. Soloviev, A. R. Terkulov, L. N. Shtarkov, Ya. A. Vazdyk & M. V. Zavertyaev

  5. Institute of Nuclear Physics, Moscow State University, Moscow, USSR

    E. A. Chudakov

  6. Hilendarski, University of Plovdiv, Plovdiv, Bulgaria

    V. D. Cholakov

  7. Institute of Physics of the Czechoslovak Academy of Science, Prague, Czechoslovakia

    J. Haladky, M. Novak, M. Smizanska & M. Vetsko

  8. Higher Chemical-Technological Institute, Sofia, Bulgaria

    V. I. Zayachky

  9. Central Laboratory of Automation and Scientific, Instrumentation of the Bulgarian Academy of Science, Sofia, Bulgaria

    V. R. Krastev

  10. Institute of Nuclear Research and Nuclear Energetics of the Bulgarian Academy of Science, Sofia, Bulgaria

    D. T. Burilkov, P. K. Markov, P. T. Todorov & R. K. Trayanov

  11. Institute of High Energy Physics, Tbilisi State University, Tbilisi, USSR

    L. N. Abesalashvili, N. S. Amaglobeli, M. S. Chargeishvili, N. O. Kadagidze, V. D. Kekelidze, R. A. Kvatadze, N. L. Lomidze, G. V. Melitauri, G. I. Nikobadze, T. G. Pitskhelauri, R. G. Shanidze & G. T. Tatishvili

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  1. A. N. Aleev
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  2. V. A. Arefiev
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  3. V. P. Balandin
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  4. V. K. Berdyshev
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  5. V. K. Birulev
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  6. A. S. Chvyrov
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  7. I. I. Evsikov
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  8. T. S. Grigalashvili
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  9. B. N. Gus'kov
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  13. D. A. Kirillov
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  14. I. G. Kosarev
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  15. N. A. Kuz'min
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  16. M. F. Likhachev
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  17. A. L. Lyubimov
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  18. A. N. Maksimov
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  21. V. V. Pal'chik
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  22. A. V. Pose
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  23. T. B. Progulova
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  24. A. Prokes
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  25. V. V. Rybakov
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  26. L. A. Slepets
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  27. A. I. Zinchenko
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  28. A. F. Kamburyan
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  29. A. A. Loktionov
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  30. Yu. K. Potrebenikov
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  31. V. I. Skorobogatova
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  32. I. Pazoni
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  33. I. Veress
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  34. P. Zalan
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  35. A. S. Belousov
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  36. E. G. Devitsin
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  37. A. M. Fomenko
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  38. V. A. Kozlov
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  39. E. I. Malinovsky
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  40. S. Yu. Potashev
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  47. M. V. Zavertyaev
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  48. E. A. Chudakov
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  49. V. D. Cholakov
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  50. J. Haladky
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  51. M. Novak
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  52. M. Smizanska
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  53. M. Vetsko
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  54. V. I. Zayachky
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  60. L. N. Abesalashvili
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  61. N. S. Amaglobeli
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  62. M. S. Chargeishvili
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  63. N. O. Kadagidze
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  64. V. D. Kekelidze
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  65. R. A. Kvatadze
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  66. N. L. Lomidze
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  67. G. V. Melitauri
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  71. G. T. Tatishvili
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BIS-2 Collaboration

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BIS-2 Collaboration., Aleev, A.N., Arefiev, V.A. et al. Search for narrow baryonia with negative and positive strangeness. Z. Phys. C - Particles and Fields 47, 533–537 (1990). https://doi.org/10.1007/BF01552317

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  • DOI: https://doi.org/10.1007/BF01552317

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