A coupled-channel analysis of $KΛ$ production in the nucleon resonance region

Details A coupled-channel analysis of $KΛ$ production in the nucleon resonance region A coupled-channel analysis of $KΛ$ production in the nucleon resonance region

2005-05-03

arxiv.org/abs/nucl-th/0505010v1

Phys.Rev.C72:015210,2005

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

10.1103/PhysRevC.72.015210

A unitary coupled-channel effective Lagrangian model is applied to the combined analysis of the $(\pi,\gamma) N \to K\Lambda$ reactions in the energy region up to 2 GeV. To constrain the resonance couplings to the $K\Lambda$ final state the recent photoproduction data obtained by the SAPHIR, SPring-8, and CLAS groups are included into the calculations. The main resonance contributions to the process stem from the $S_{11}(1650)$, $P_{13}(1720)$, and $P_{13}(1900)$ states. The second bump at 1.9 GeV seen in the photoproduction cross section data is described as a coherent sum of the resonance and background contributions. The prediction for the beam polarization observable is presented.

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