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

Along with π 0 and η mesons, a resonance structure in the invariant mass spectrum of two photons at M γγ = 360 ± 7 ± 9 MeV is observed in d C interactions at momentum 2.75 GeV/ c per nucleon. This resonance structure is not observed in p C collisions at the beam momentum 5.5 GeV/ c . The result obta...

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Veröffentlicht in:	Physics of atomic nuclei 2012-06, Vol.75 (6), p.657-660
Hauptverfasser:	Abraamyan, Kh. U., Baznat, M. I., Friesen, A. V., Gudima, K. K., Kozhin, M. A., Lebedev, S. A., Nazarenko, M. A., Nikitin, S. A., Ososkov, G. A., Reznikov, S. G., Sigov, A. S., Sissakian, A. N., Sorin, A. S., Toneev, V. D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Elementary Particles and Fields Particle and Nuclear Physics Physics Physics and Astronomy
Online-Zugang:	Volltext
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Zusammenfassung:	Along with π 0 and η mesons, a resonance structure in the invariant mass spectrum of two photons at M γγ = 360 ± 7 ± 9 MeV is observed in d C interactions at momentum 2.75 GeV/ c per nucleon. This resonance structure is not observed in p C collisions at the beam momentum 5.5 GeV/ c . The result obtained in the reaction d C 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.
ISSN:	1063-7788 1562-692X
DOI:	10.1134/S1063778812060026