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- Title
SEARCH FOR PENTAQUARK ϴ<sup>+</sup> IN HADRONIC REACTION AT J-PARC.
- Authors
NARUKI, MEGUMI
- Abstract
A variety of nuclear and hadron physics experiments are being performed using meson beams at the J-PARC Hadron Facility. As the first experiment at the facility, the pentaquark ϴ+ was searched for in the π-p → K+X reaction with a missing-mass resolution of 2 MeV (FWHM). The number of accumulated beam pions are 7.8 × 1010 and 8.1 × 1010 for different beam momenta of 1.92 and 2.01 GeV/c, respectively. No significant structure was observed in the missing-mass spectra. Upper limits of the production cross section are obtained to be 0.28 μb/sr in the laboratory frame at 90% confidence level for each beam momenta. With a help of theoretical models, an upper limit of the total decay width of ϴ+ was estimated to be 0.36 and 1.9 MeV for JP = 1/2+ and 1/2- states, respectively.
- Subjects
PENTAQUARK; EXOTIC baryons; HADRONS; NUCLEAR physics; MESONS
- Publication
Acta Physica Polonica B, 2016, Vol 47, Issue 2, p385
- ISSN
0587-4254
- Publication type
Article
- DOI
10.5506/APhysPolB.47.385