The phase and pole structure of the N*(1535) in piN-->piN and gammaN-->piN

Abstract

The nature of some baryonic resonances is still an unresolved issue. The case of the N*(1535) is particularly interesting in this respect due to the nearby etaN threshold and interference with the N*(1650). The N*(1535) has been described as a threshold effect, as a genuine 3-quark resonance, or as dynamically generated from the interaction of the octet of baryons with the octet of mesons. In the scheme of dynamical generation, predictions for the interaction of the N*(1535) with the photon can be made. In this study, we simultaneously analyze the role of the N*(1535) in the piN-->piN and gammaN-->piN reactions and compare to the respective amplitudes from partial wave analyses. This test is very sensitive to the meson-baryon components of the N*(1535).

22 pages, 16 figures; updated to revised version accepted by EPJA

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Cited by in corpus (35)

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• Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model
• Electromagnetic Excitation of Nucleon Resonances
• Photocouplings at the Pole from Pion Photoproduction
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• On the cross section ratio sigma_n/sigma_p in eta photoproduction
• Pion photoproduction in a dynamical coupled-channels model
• Dynamical coupled-channel approaches on a momentum lattice
• Pion photoproduction off the proton in a gauge-invariant chiral unitary framework
• A covariant model for the gamma N -> N(1535) transition at high momentum transfer
• Relevance of complex branch points for partial wave analysis
• Electromagnetic Transition Form Factors of Baryon Resonances
• Finite volume effects and quark mass dependence of the N(1535) and N(1650)
• Strong decay of low-lying $S_{11}$ and $D_{13}$ nucleon resonances to pseudoscalar mesons and octet baryons
• Associated strangeness production in the pp to pK^+K^-p and pp to pK^+ pi^0 Sigma^0 reactions
• Helicity Amplitudes of the Lambda(1670) and two Lambda(1405) as dynamically generated resonances
• Nucleon resonance parameters from Roy-Steiner equations
• Evaluation of the polarization observables I^S and I^C in the reaction gamma p --> pi^0 eta p
• Role of the $N^{\ast }(1535)$ in the ${\Lambda }_c^{+}\to {\bar{K}}^0\eta p$ decay
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• A chiral quark model for meson electro-production in the S11 partial wave
• Correlations of $\mathbf{\pi N}$ Partial Waves for Multi-Reaction Analyses
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• Nucleon resonances in the ${\pi }^{-}p\to K^0\Lambda$ reaction near threshold
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• Combined analysis of the ${\pi }^{-}p\to K^0\Lambda$, $\eta n$ reactions in a chiral quark model
• Pion photoproduction of nucleon excited states with Hamiltonian effective field theory
• How does the $S_{11}$ $N^{\ast }(890)$ state emerge from a naive $K$ matrix fit?
• Quark model study of the $\pi N\to \pi N$ reactions up to the $N(1440)$ resonance region
• Dispersive analysis of low energy ${\gamma }^{\ast }N\to \pi N$ process
• The pseudoscalar meson and baryon octet interaction with strangeness zero in the unitary coupled-channel approximation
• Dynamically generated resonances
• Review on recent progress in the study of the $N^{\ast }(920)$ subthreshold singularity and the $\sigma /f_0(500)$ meson
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