Photoproduction of eta meson within a coupled-channels K-matrix approach

Abstract

We investigate photoproduction of eta mesons off protons and neutrons within a coupled-channels effective-Lagrangian method which is based on the K-matrix approach. The two-body final channels included are pi-N, eta-N, phi-N, rho-N, gamma-N, K-Lambda, and K-Sigma. Non-resonant meson-baryon interactions are included in the model via nucleon intermediate states in the s- and u-channels, meson exchanges in the t-channel amplitude and the u-channel resonances. The nucleon resonances S_{11}(1535), S_{11}(1650), S_{31}(1620), P_{11}(1440), P_{11}(1710), P_{13}(1720), P_{33}(1232), P_{33}(1600), D_{13}(1520), D_{13}(1700), and D_{33}(1700) are included explicitly in calculations. Our model describes simultaneously the available data as well on total and differential cross sections as on beam and target asymmetries. This holds for the p(gamma,eta)p reaction for photon energies ranging from very close to threshold to up to 3 GeV. The polarization observables show strong sensitivity to resonances that otherwise contribute only weakly to the total cross section. It is found that the pronounced bump-like structure seen in the excitation function of the n(gamma,eta)n cross section at gamma energies around 1 GeV, can be explained by the interference effects of S_{11}, P_{11} and P_{13} resonance contributions.

arXiv comment36 pages, 14 figures, one new figure added, discussions revised, version to appear in Phys. Rev. C

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Cited by in corpus (34)

• Photoproduction of $\eta$ and $\eta \prime$ Mesons off Protons
• Eta-meson production in the resonance energy region
• On the cross section ratio sigma_n/sigma_p in eta photoproduction
• Quasi-free photoproduction of eta-mesons off the deuteron
• Light Baryon Spectroscopy
• Quasifree photoproduction of $\eta$ mesons off protons and neutrons
• Interaction of eta mesons with nuclei
• Photoproduction of mesons off nuclei
• A narrow structure in the excitation function of eta-photoproduction off the neutron
• P-wave excited baryons from pion- and photo-induced hyperon production
• $\eta$ photoproduction on the quasi-free nucleons in the chiral quark model
• $\bar{K}+N\to K+\Xi$ reaction and $S=-1$ hyperon resonances
• The associated photoproduction of K+ meson off proton within a coupled-channels K-matrix approach
• Insight into the narrow structure in {\boldmath{$\eta$}}-photoproduction on the neutron from helicity dependent cross sections
• Quasi-free photoproduction of eta-mesons off 3He nuclei
• Production of a cascade hyperon in the K^- - proton interaction
• Helicity-dependent cross sections and double-polarization observable E in eta photoproduction from quasi-free protons and neutrons
• Neutral pion photoproduction on the nucleon in a chiral quark model
• Sign ambiguity in the K Sigma channel
• A chiral quark model for meson electro-production in the S11 partial wave
• Photoproduction of eta mesons from the neutron: cross sections and double polarization observable E
• Evidence for narrow resonant structures at $W\approx 1.68$ and $W\approx 1.72$ GeV in real Compton scattering off the proton
• Photoproduction of hypernuclei within the quark-meson coupling model
• Is there a narrow $N(1685)$?
• Observation of Narrow $N^{+}(1685)$ and $N^0(1685)$ Resonances in $\gamma N\to \eta \pi N$ Reactions
• A relativistic description of the A(pi+,K+)_ΛA reaction
• Pion Photoproduction off Nucleon with Hamiltonian Effective Field Theory
• Eta and kaon production in a chiral quark model
• Effects of nucleon resonances on $\eta$ photoproduction off the neutron reexamined
• Binding of hypernuclei, and phtoproduction of $\Lambda$-hypernuclei in the latest quark-meson coupling model
• Charmed-baryon production in antiproton-proton collisions within an effective Lagrangian model
• New Narrow $N(1685)$ and $N(1726)$? Remarks on the Interpretation of the Neutron Anomaly as an Interference Phenomenon
• New narrow nucleon resonances $N^{\ast }(1685)$ and $N^{\ast }(1726)$ within the chiral quark-soliton model
• Nuclear Reactions at Intermediate Energies