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Resonance structure in the γγ invariant mass spectrum in pC, dC, and dCu interactions

Physics of Atomic Nuclei volume 75, pages 657–660 (2012)Cite this article

Abstract

Along with π 0 and η mesons, a resonance structure in the invariant mass spectrum of two photons atM γγ = 360 ± 7 ± 9 MeV is observed in dC interactions at momentum 2.75 GeV/c per nucleon. This resonance structure is not observed in pC collisions at the beam momentum 5.5 GeV/c. The result obtained in the reaction dC is confirmed by the second experiment carried out on the deuteron beam at momentum 3.83 GeV/c per nucleon with a copper target. Some other checks of the observed effect are presented.

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Authors and Affiliations

  1. Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia

    Kh. U. Abraamyan, M. A. Kozhin, S. A. Nikitin & S. G. Reznikov

  2. International Center for Advanced Studies, YSU, Yerevan, Armenia

    Kh. U. Abraamyan

  3. Institute of Applied Physics, Kishinev, Moldova

    M. I. Baznat & K. K. Gudima

  4. Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia

    A. V. Friesen, A. N. Sissakian, A. S. Sorin & V. D. Toneev

  5. Laboratory of Information Technologies, JINR, Dubna, Russia

    S. A. Lebedev & G. A. Ososkov

  6. Gesellschaft für Schwerionenforschung, Darmstadt, Germany

    S. A. Lebedev

  7. Moscow State Institute of Radioengineering, Electronics and Automation, Moscow, Russia

    M. A. Nazarenko & A. S. Sigov

Authors
  1. Kh. U. Abraamyan
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  2. M. I. Baznat
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  3. A. V. Friesen
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  4. K. K. Gudima
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  5. M. A. Kozhin
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  6. S. A. Lebedev
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  7. M. A. Nazarenko
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  8. S. A. Nikitin
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  9. G. A. Ososkov
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  10. S. G. Reznikov
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  11. A. S. Sigov
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  12. A. N. Sissakian
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  13. A. S. Sorin
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  14. V. D. Toneev
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Corresponding author

Correspondence to Kh. U. Abraamyan.

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The text was submitted by the authors in English.

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Abraamyan, K.U., Baznat, M.I., Friesen, A.V. et al. Resonance structure in the γγ invariant mass spectrum in pC, dC, and dCu interactions. Phys. Atom. Nuclei 75, 657–660 (2012). https://doi.org/10.1134/S1063778812060026

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  • DOI: https://doi.org/10.1134/S1063778812060026

Keywords

  • Atomic Nucleus
  • Invariant Mass
  • Invariant Mass Distribution
  • Invariant Mass Spectrum
  • Beam Momentum