Abstract
Properties of the nucleon resonances are investigated within a coupled channel model of πN, γN → πN, ηN, KΛ, KΣ and ππN reactions. The pole positions and the residues of the nucleon resonances are extracted by using the analytic continuation of the scattering amplitudes.
Highlights
One of the important issue in hadron physics is to understand the baryon spectrum and the structure of excited states within Quantum Chromodynamics (QCD)
We report on our recent results[1] on the nucleon resonances from the dynamical coupled-channel model(DCC) developed in Ref. 12
The nucleon resonances are extracted by using careful analytic continuation of the scattering amplitudes.[18]
Summary
One of the important issue in hadron physics is to understand the baryon spectrum and the structure of excited states within Quantum Chromodynamics (QCD). The study of the excitations of nucleon resonances in πN and γN reactions has been a well recognized important task in advancing our understanding of the structure of baryons. The extraction of nucleon resonances has a long history and several different approaches have been developed.[1,2,3,4,5,6,7,8,9,10,11] In this paper, we report on our recent results[1] on the nucleon resonances from the dynamical coupled-channel model(DCC) developed in Ref. 12. We have extended the dynamical coupled-channels model to include the KΛ and KΣ channels and have completed a combined analysis of the data of πN, γN → πN, ηN, KΛ, KΣ reactions and extracted the resonance parameters.
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