&+circ; Search in CLAS with γd->pK^0sK^-(p)
Abstract
A search for photo-production of the &+circ;(1540) pentaquark in the pK^0 decay mode was performed with the CLAS detector at Jefferson Lab. About 20,000 γd->pK^0sK^-(p) events with photon beam energies 1.6-3.6GeV were fully reconstructed and kinematically fitted. To investigate the resonant backgrounds, a phenomological model including hyperon and meson production has been developed and fitted to the data w ith a maximum-likelihood method. The model results serve as a background to evaluate the existence of a pentaquark signal in the invariant mass of the pK^0 system. The cross-section upper limit on &+circ; photo-production in this channel will be reported.
- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- October 2006
- Bibcode:
- 2006APS..DNP.BG009B