期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.132002
关键词
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资金
- Japan Society for the Promotion of Science (JSPS)
- Ministry of Education, Culture, Sports, Science and Technology, Japan [22105512]
- WCU program
- National Research Foundation
- Center for Korean J-PARC Users
- Ministry of Education, Science, and Technology (Korea)
- [17070001]
- [17070003]
- [17070006]
- Grants-in-Aid for Scientific Research [24540305, 24105001, 23244043, 21684011, 21105003, 24105002, 10J00350, 10J03038, 22105512, 24105003, 24740138] Funding Source: KAKEN
The Theta(+) pentaquark baryon was searched for via the pi(-) p -> K- X reaction with a missing mass resolution of 1.4 MeV/c(2) (FWHM) at the Japan Proton Accelerator Research Complex (J-PARC). pi(-) meson beams were incident on the liquid hydrogen target with a beam momentum of 1.92 GeV/c. No peak structure corresponding to the Theta(+) mass was observed. The upper limit of the production cross section averaged over the scattering angle of 2 degrees to 15 degrees in the laboratory frame is obtained to be 0.26 mu b/sr in the mass region of 1.51-1.55 GeV/c(2). The upper limit of the Theta(+) decay width is obtained to be 0.72 and 3.1 MeV for J(Theta)(P) = 1/2(+) and J(Theta)(P) = 1/2(-), respectively, using the effective Lagrangian approach.
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