eta-meson photoproduction off protons and deuterons

Abstract

We present a unitary and gauge-invariant model with coupled channels, which provides a consistent description of pion photoproduction off nucleons in the E${}_{0+}$ channel and eta-meson photoproduction off protons and deuterons. An effective field theory with hadrons and photons is constructed, which includes non-resonant Born terms as well as the S${}_{11}$(1535) and S${}_{11}$(1650) baryon resonances. Due to the coupling between the channels, the production of eta-mesons is strongly affected by the S${}_{11}$(1650) although its direct coupling to the $\eta$N channel is negligible. The rho- and omega-meson exchange terms are important for achieving a consistent description of both pion- and photon-induced reactions.

11 pages Latex, 4 Postscript Figures

Cited by in corpus (25)

• Photon- and meson-induced reactions on the nucleon
• Baryon Resonance Extraction from piN Data using a Unitary Multichannel Model
• Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV I: pion-induced results and hadronic parameters
• A unitary model for meson-nucleon scattering
• Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV II: photon-induced results
• Coupled-channel analysis of the $\omega$-meson production in $\pi N$ and $\gamma N$ reactions for c.m. energies up to 2 GeV
• eta-photoproduction in the resonance energy region
• Eta-meson production in the resonance energy region
• eta-Nucleon Scattering Length and Effective Range uncertainties
• Dependence of calculated binding energies and widths of $\eta$-mesic nuclei on treatment of subthreshold $\eta$-nucleon interaction
• Coupled-channels study of the ${\pi }^{-}p\to \eta n$ process
• S-matrix analysis of the baryon electric charge correlation
• Photoproduction of eta meson within a coupled-channels K-matrix approach
• Analysis of resonance multipoles from polarization observables in eta photoproduction
• Low-energy etaN interactions: scattering lengths and resonance parameters
• Eta-N Final State Interaction in incoherent Photoproduction of Eta-mesons from the Deuteron near Threshold
• Excitation of S11 resonances in pion scattering and pion photoproduction on the proton
• Search for Quasi Bound $\eta$ Mesons
• $\eta$-meson in nuclear matter
• $2\pi$ production in the Giessen coupled-channel model
• Coherent pi0-pi0 photoproduction on lightest nuclei
• Extraction of Electrostrong Parameters of $N^{\ast }(1520)$ from Eta Photoproduction
• Coherent phi and omega meson photoproduction from deuteron and non-diffractive channels
• Charged current (anti)neutrino induced eta production off the nucleon
• The role of pion exchange in $\eta$ meson photo production on the deuteron