The eta Photoproduction of Nucleons and The structure of the Resonance S11(1535) in The Quark Model

Abstract

In this paper, we present our study on the $\eta$ photoproduction based on the chiral quark model. We find that quark model provides a very good description of the $\eta$ production with much less parameters, and the threshold region is not a reliable source to determine the $\eta NN$ coupling constant due to its strong dependence on the properties of the resonance $S_{11}(1535)$. We suggest that the systematic data in $E_{lab}=1.2\sim 1.4$ GeV region may help us to determine the $\eta NN$ coupling constant more precisely. The structure of the resonance $S_{11}(1535)$ is discussed, we find that the recent data from Mainz group bring the helicity amplitude much closer to the quark model prediction. However, more studies need to be done to understand the large $\eta N$ branching ratio of the resonance $S_{11}(1535)$. Our results show that the quark model is a very good approach to study the underlying structure of baryon resonances from the meson photoproduction data.

21 pages in LaTex file, 6 postscript figures can be obtained from the author

References in corpus (4)

• Quasi-Two-Body Decays of Nonstrange Baryons
• Effective Lagrangian Approach to the Theory of Eta Photoproduction in the $N^{\ast }(1535)$ Region
• The Kaon-Photoproduction Of Nucleons In The Quark Model
• The Threshold Pion-Photoproduction of Nucleons In The Chiral Quark Model

Cited by in corpus (29)

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• Vector Meson Photoproduction with an Effective Lagrangian in the Quark Model
• Pion photoproduction on the nucleon in the quark model
• Strong decays of qqq baryons
• Possible 2S and 1D charmed and charmed-strange mesons
• $\eta$ photoproduction on the quasi-free nucleons in the chiral quark model
• ${\eta }^{\prime }$ photoproduction on the nucleons in the quark model
• Study of π^{-}p \to ηn at low energies in a chiral constituent quark model
• Quark model approach to the $\eta$ meson electroproduction on the proton
• eta-meson photoproduction off protons and deuterons
• Properties of $N^{\ast }$(1535) at Finite Density in the Extended Parity-Doublet Models
• The $K^{-}p\to {\Sigma }^0{\pi }^0$ reaction at low energies in a chiral quark model
• Nucleonic resonance effects in the $\varphi$ meson photoproduction
• Model-Independent Extraction of the N*(1535) Electrostrong Form Factor from Eta Electroproduction
• ${\eta }^{\prime }$ photoproduction near threshold
• Low energy reactions $K^{-}p\to {\Sigma }^0{\pi }^0$, $\Lambda {\pi }^0$, ${\bar{K}}^{0}n$ and the strangeness $S=-1$ hyperons
• The ${\eta }^{\prime }$ Photoproduction off the Nucleon in the quark model
• QCD Sum Rule for S_{11}(1535)
• Low energy reaction $K^{-}p\to \Lambda \eta$ and the negative parity $\Lambda$ resonances
• Combined analysis of the ${\pi }^{-}p\to K^0\Lambda$, $\eta n$ reactions in a chiral quark model
• Calculation of $g_{\pi N{S}_{11}}$ and $g_{\eta N{S}_{11}}$ Couplings in QCD Sum Rules
• $Q^2$--Dependence of the Gerasimov-Drell-Hearn Sum Rule
• Quark model study of the $\pi N\to \pi N$ reactions up to the $N(1440)$ resonance region
• Quasifree eta photoproduction from nuclei and medium modifications of resonances