Published February 2009 | Version v1
Journal article Metadata-only

Evidence for the Θ+ in the γd→K+K-pn reaction by detecting K+K- pairs

Creators

  • 1. Research Center for Nuclear Physics, Osaka University, Ibaraki 567-0047 (Japan)
  • 2. Department of Physics, Pusan National University, Busan 609-735 (Korea, Republic of)
  • 3. Department of Physics, Konan University, Kobe 658-8501 (Japan)
  • 4. Japan Synchrotron Radiation Research Institute, Mikazuki 679-5198 (Japan)

Description

The γd→K+K-pn reaction has been studied to search for the evidence of the Θ+ by detecting K+K- pairs at forward angles. The Fermi-motion-corrected nK+ invariant mass distribution shows a narrow peak at 1.524±0.002+0.003 GeV/c2. The statistical significance of the peak calculated from a shape analysis is 5.1 σ, and the differential cross section for the γn→K-Θ+ reaction is estimated to be 12±2 nb/sr in the photon energy range from 2.0 to 2.4 GeV in the LEPS angular range by assuming the isotropic production of the Θ+ in the γn center-of-mass system. The obtained results support the existence of the Θ+

Additional details

Identifiers

DOI
10.1103/PhysRevC.79.025210;
arXiv
arXiv:0812.1035v1;

Publishing Information

Journal Title
Physical Review. C, Nuclear Physics
Journal Volume
79
Journal Issue
2
Journal Page Range
p. 025210-025210.15
ISSN
0556-2813
CODEN
PRVCAN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40069613
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
CENTER-OF-MASS SYSTEM; DEUTERIUM; DIFFERENTIAL CROSS SECTIONS; GAMMA RADIATION; GEV RANGE 01-10; KAONS MINUS; KAONS PLUS; LEP STORAGE RINGS; MASS DISTRIBUTION; PHOTONS
Descriptors DEC
ACCELERATORS; BOSONS; CROSS SECTIONS; CYCLIC ACCELERATORS; DISTRIBUTION; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY RANGE; GEV RANGE; HADRONS; HYDROGEN ISOTOPES; IONIZING RADIATIONS; ISOTOPES; KAONS; LIGHT NUCLEI; MASSLESS PARTICLES; MESONS; NUCLEI; ODD-ODD NUCLEI; PSEUDOSCALAR MESONS; RADIATIONS; SPATIAL DISTRIBUTION; STABLE ISOTOPES; STORAGE RINGS; STRANGE MESONS; STRANGE PARTICLES; SYNCHROTRONS

Optional Information

Notes
(c) 2009 The American Physical Society