Search for $$\Theta^+(1540)$$ pentaquark in high statistics measurement of $$\gamma p \to \bar K^0 K^+ n$$ at CLAS
The exclusive reaction {gamma}p {yields} {bar K}{sup 0}K{sup +}n was studied in the photon energy range between 1.6-3.8 GeV searching for evidence of the exotic baryon {Theta}{sup +}(1540) {yields} nK{sup +}. The decay to nK{sup +} requires the assignment of strangeness S = +1 to any observed resonance. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility corresponding to an integrated luminosity of 70 pb{sup -1}. No evidence for the {Theta}{sup +} pentaquark was found. Upper limits were set on the production cross section as function of center-of-mass angle and nK{sup +} mass. The 95% CL upper limit on the total cross section for a narrow resonance at 1540 MeV was found to be 0.8 nb.
- Research Organization:
- Office of Scientific and Technical Information (OSTI), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE - Office of Energy Research (ER)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 875476
- Report Number(s):
- JLAB-PHY-05-20; DOE/ER/40150-3684; hep-ex/0510061; TRN: US0601082
- Country of Publication:
- United States
- Language:
- English
Similar Records
Search for the Theta+ pentaquark in the reactions gammap-->[overline K]0K+n and gammap-->[overline K]0K0p
Search for the {theta}{sup +} pentaquark in the reactions {gamma}p{yields}K{sup 0}K{sup +}n and {gamma}p{yields}K{sup 0}K{sup 0}p