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Background study for the pentaquark search in the reaction gamma p ->pi(+)Kappa(-)Kappa(+) n

Author:
Guo, L  Weygand, DP  Kubarovsky, V  


Journal:
First Meeting of the APS Topical Group on Hadronic Physics


Issue Date:
2005


Abstract(summary):

A narrow baryon state with strangeness S=+1 and mass M = 1555 +/- 10 MeV/c(2) reported by the CLAS collaboration in the reaction gamma p -> pi(+)K(-)K(+)n, has been observed at Jefferson Lab using a tagged photon beam with an energy range of 3-5.47 GeV. A thorough investigation on whether background processes, such as pi(2)(1670) production, can reflect into the possible Theta(+) peak was conducted by performing a partial wave analysis on the three-body mesonic background in the energy range of 4.8-5.47 GeV. The analysis also probes other possible processes, and does not find evidence for the observed signal being a result of kinematic reflection.


Page:
272---275


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