Search for the Theta+ Pentaquark in the Reaction gammad-->pK0K-(p) with CLAS [electronic resource]
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| Online Access: |
Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Department of Energy. Office of Science ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2007.
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| Subjects: |
| Abstract: | A search for photo-production of the Theta+(1540) pentaquark and its decay to pK0 was performed with the CLAS detector system at Jefferson Lab. In the exclusive channel gammad-->pK0sK-(p), about twenty-thousand events with a slow missing proton, pi+pi- decay of the neutral kaon, and photon energy between 1.6 and 3.6 GeV are fully reconstructed. Included are numerous hyperon and meson resonances, with their decays to pK- and K0K- respectively. To understand the possibility of a pentaquark signal amidst the backgrounds, a phenomenological isobar-inspired model of complex Breit-Wigner amplitudes and decay angular distributions for the resonances is fit to the data with a maximum likelihood method. No pentaquark signal is found above the background. The upper limit on the total production cross section is measured to be consistent with other channels published by the collaboration, but systematic studies are still in progress. |
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| Item Description: | Published through SciTech Connect. 10/01/2007. "jlab-phy-07-754" " doe/or/23177-0246" AIP Conference Proceedings 947. VII Latin American Symposium on Nuclear Physics and Applications, Cusco, Peru, June 11-16, 2007. Baltzell, Nathan A. |
| Physical Description: | p. 158-161 : digital, PDF file. |