Published September 8, 2006
| Version v1
Journal article
Search for Θ++ Pentaquarks in the Exclusive Reaction γp→K+K-p
Creators
- Kubarovsky, V.1, 2
- Battaglieri, M.3
- Vita, R. De3
- Anghinolfi, M.3
- Ricco, G.3
- Ripani, M.3
- Taiuti, M.3
- Goett, J.2
- Stoler, P.2
- Cummings, J. P.2
- Li, Ji2
- Guo, L.1
- Weygand, D. P.1
- Avakian, H.1
- Boiarinov, S.1
- Brooks, W. K.1
- Burkert, V. D.1
- Degtyarenko, P. V.1
- Deur, A.1
- Egiyan, H.1
- and others
- CLAS Collaboration
- 1. Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
- 2. Rensselaer Polytechnic Institute, Troy, New York 12180-3590 (United States)
- 3. Istituto Nazionale di Fisica Nucleare, Sezione di Genova, and Dipartimento di Fisica, Universita di Genova, 16146 Genova (Italy)
Description
The reaction γp→pK+K- was studied at Jefferson Lab with photon energies from 1.8 to 3.8 GeV using a tagged photon beam. The goal was to search for a Θ++ pentaquark, a narrow, doubly charged baryon state having strangeness S=+1 and isospin I=1, in the pK+ invariant mass spectrum. No statistically significant evidence of a Θ++ was found. Upper limits on the total and differential cross section for the reaction γp→K-Θ++ were obtained in the mass range from 1.5 to 2.0 GeV/c2, with an upper limit for a narrow resonance with a mass MΘ++=1.54 GeV/c2 of about 0.15 nb, 95% C.L.. This result places a stringent upper limit on the Θ++ width ΓΘ++<0.1 MeV/c2
Additional details
Identifiers
- DOI
- 10.1103/PhysRevLett.97.102001;
- arXiv
- arXiv:hep-ex/0605001v1;
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 97
- Journal Issue
- 10
- Journal Page Range
- p. 102001-102001.5
- ISSN
- 0031-9007
- CODEN
- PRLTAO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38023741
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- BARYONS; CEBAF ACCELERATOR; DIFFERENTIAL CROSS SECTIONS; GAMMA RADIATION; GEV RANGE 01-10; ISOSPIN; KAONS MINUS; KAONS PLUS; MASS; MASS SPECTRA; PAIR PRODUCTION; PARTICLE WIDTHS; PHOTON BEAMS; PHOTONS; PROTON BEAMS; PROTON REACTIONS; STRANGENESS
- Descriptors DEC
- ACCELERATORS; BARYON REACTIONS; BEAMS; BOSONS; CHARGED-PARTICLE REACTIONS; CROSS SECTIONS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRON REACTIONS; HADRONS; INTERACTIONS; IONIZING RADIATIONS; KAONS; LINEAR ACCELERATORS; MASSLESS PARTICLES; MESONS; NUCLEAR REACTIONS; NUCLEON BEAMS; NUCLEON REACTIONS; PARTICLE BEAMS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PSEUDOSCALAR MESONS; RADIATIONS; SPECTRA; STRANGE MESONS; STRANGE PARTICLES
Optional Information
- Notes
- (c) 2006 The American Physical Society
- Collaborations
- CLAS Collaboration