Published September 2009
| Version v1
Journal article
Resonance structure in the γγ invariant mass spectrum in pC and dC interactions
Creators
- Abraamyan, Kh. U.1, 2, 3, 4, 5, 6
- Friesen, A. V.1, 2, 3, 4, 5, 6
- Kozhin, M. A.1, 2, 3, 4, 5, 6
- Nikitin, S. A.1, 2, 3, 4, 5, 6
- Reznikov, S. G.1, 2, 3, 4, 5, 6
- Baznat, M. I.1, 2, 3, 4, 5, 6
- Gudima, K. K.1, 2, 3, 4, 5, 6
- Lebedev, S. A.1, 2, 3, 4, 5, 6
- Nazarenko, M. A.1, 2, 3, 4, 5, 6
- Ososkov, G. A.1, 2, 3, 4, 5, 6
- Sissakian, A. N.1, 2, 3, 4, 5, 6
- Sorin, A. S.1, 2, 3, 4, 5, 6
- Toneev, V. D.1, 2, 3, 4, 5, 6
- 1. BLTP JINR, Moscow region, RU-141980 Dubna (Russian Federation)
- 2. LIT JINR, Moscow region, RU-141980 Dubna (Russian Federation)
- 3. Moscow State Institute of Radioengineering, Electronics and Automation, RU-119454 Moscow (Russian Federation)
- 4. LIT JINR, Moscow region, RU-141980 Dubna, Russia and Gesellschaft fuer Schwerionenforschung, D-64291 Darmstadt (Germany)
- 5. Institute of Applied Physics, MD-2028 Kishinev (Moldova, Republic of)
- 6. VBLHEP JINR, Moscow region, RU-141980 Dubna (Russian Federation)
Description
Along with π0 and η mesons, a resonance structure in the invariant mass spectrum of two photons at Mγγ=360±7±9 MeV is observed in the reaction dC→γ+γ+X at momentum 2.75 GeV/c per nucleon. Estimates of its width and production cross section are Γ=63.7±17.8 MeV and σγγ=98±24-67+93 μb, respectively. The collected statistics amount to 2339±340 events of 1.5x106 triggered interactions of a total number ∼1012 of dC interactions. This resonance structure is not observed in pC collisions at the beam momentum 5.5 GeV/c. Possible mechanisms of this ABC-like effect are discussed.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevC.80.034001;
- arXiv
- arXiv:0806.2790v5;
Publishing Information
- Journal Title
- Physical Review. C, Nuclear Physics
- Journal Volume
- 80
- Journal Issue
- 3
- Journal Page Range
- p. 034001-034001.18
- ISSN
- 0556-2813
- CODEN
- PRVCAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41039868
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- BEAMS; COLLISIONS; CROSS SECTIONS; DEUTERONS; ETA MESONS; GAMMA RADIATION; INTERACTIONS; ION-ATOM COLLISIONS; MASS SPECTRA; MEV RANGE; NUCLEONS; PHOTONS; PIONS NEUTRAL; RESONANCE
- Descriptors DEC
- ATOM COLLISIONS; BARYONS; BOSONS; CHARGED PARTICLES; COLLISIONS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; HADRONS; ION COLLISIONS; IONIZING RADIATIONS; MASSLESS PARTICLES; MESONS; PIONS; PSEUDOSCALAR MESONS; RADIATIONS; SPECTRA
Optional Information
- Notes
- (c) 2009 The American Physical Society