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

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• 作者：Kh. U. Abraamyan (12) abraam@sunhe.jinr.ru
  M. I. Baznat (3)
  A. V. Friesen (4)
  K. K. Gudima (3)
  M. A. Kozhin (1)
  S. A. Lebedev (56)
  M. A. Nazarenko (7)
  S. A. Nikitin (1)
  G. A. Ososkov (5)
  S. G. Reznikov (1)
  A. S. Sigov (7)
  A. N. Sissakian (4)
  A. S. Sorin (4)
  V. D. Toneev (4)
• 刊名：Physics of Atomic Nuclei
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：75
• 期：6
• 页码：657-660
• 全文大小：589.8 KB
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• 作者单位：1. Veksler and Baldin Laboratory of High Energy Physics, JINR, Dubna, Russia2. International Center for Advanced Studies, YSU, Yerevan, Armenia3. Institute of Applied Physics, Kishinev, Moldova4. Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna, Russia5. Laboratory of Information Technologies, JINR, Dubna, Russia6. Gesellschaft für Schwerionenforschung, Darmstadt, Germany7. Moscow State Institute of Radioengineering, Electronics and Automation, Moscow, Russia
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Nuclei
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1562-692X

文摘

Along with π 0 and η mesons, a resonance structure in the invariant mass spectrum of two photons atM ub> γγ ub> = 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.