The $\eta$NN Coupling in Eta Photoproduction

Abstract

Low-energy eta photoproduction on the nucleon is studied in an effective Lagrangian approach that contains Born terms, vector meson and nucleon resonance contributions. The resonance sector includes the $S_{11}(1535)$, $P_{11}(1440)$ and $D_{13}(1520)$ states whose couplings are fixed by independent electromagnetic and hadronic data. The available $(\gamma ,\eta )$ data are employed to discuss the difference between pseudoscalar and pseudovector Born terms and to determine the magnitude of the $\eta NN$ coupling constant. We present multipoles that are most sensitive to the various model ingredients and demonstrate how these multipoles may be accessed in polarization observables. Cross section calculations are presented for eta photoproduction on light nuclei.

25 pages, 9 figures (available from the authors), Mainz preprint MKPH-T-94-3

Cited by in corpus (102)

• The high-precision, charge-dependent Bonn nucleon-nucleon potential (CD-Bonn)
• Electric Dipole Moments of Nucleons, Nuclei, and Atoms: The Standard Model and Beyond
• SU(3) Chiral Dynamics with Coupled Channels: Eta and Kaon Photoproduction
• Photon- and meson-induced reactions on the nucleon
• Probing exotic phenomena at the interface of nuclear and particle physics with the electric dipole moments of diamagnetic atoms: A unique window to hadronic and semi-leptonic CP violation
• 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
• First measurement of the Gerasimov-Drell-Hearn integral for Hydrogen from 200 to 800 MeV
• A unitary model for meson-nucleon scattering
• Effective Lagrangian Approach to the Theory of Eta Photoproduction in the $N^{\ast }(1535)$ Region
• Photoproduction of eta-mesic 3He
• An isobar model for eta photo- and electroproduction on the nucleon
• Photo- and Electroproduction of Eta Mesons
• Charge Symmetry Breaking and QCD
• The e p -> e' p eta reaction at and above the S11(1535) baryon resonance
• A reggeized model for eta and eta-prime photoproduction
• Photoproduction of Baryons Decaying into N pi and N eta
• Close-to-threshold Meson Production in Hadronic Interactions
• $P$- and $T$-odd two-nucleon interaction and the deuteron electric dipole moment
• Coherent photoproduction of eta-mesons off 3He - search for eta-mesic nuclei
• Nucleon resonances in omega photoproduction
• Eta Meson Production in NN Collisions
• Photoproduction of eta-mesons on the deuteron above S11(1535) in the presence of a narrow P11(1670) resonance
• Are there eta-Helium bound states?
• The Time-Reversal- and Parity-Violating Nuclear Potential in Chiral Effective Theory
• Coherent ${\pi }^0$ and $\eta$ Photoproduction on the Deuteron
• Dependence of calculated binding energies and widths of $\eta$-mesic nuclei on treatment of subthreshold $\eta$-nucleon interaction
• Photoproduction of mesons off nuclei
• Photoproduction of eta meson within a coupled-channels K-matrix approach
• Eta and Etaprime Photoproduction on the Nucleon with the Isobar Model EtaMAID2018
• A new $N^{\ast }(1675)$ resonance in the $\gamma N\to \eta N$ reaction
• Analysis of resonance multipoles from polarization observables in eta photoproduction
• Survey of charge symmetry breaking operators for dd -> alpha pi0
• Finite-Energy Sum Rules in Eta Photoproduction off the Nucleon
• Low-energy etaN interactions: scattering lengths and resonance parameters
• Nucleon resonances in πN scattering up to energies \sqrt(s) < 2.0 GeV
• $\eta$ photoproduction on the quasi-free nucleons in the chiral quark model
• Excitation of S11 resonances in pion scattering and pion photoproduction on the proton
• Level crossing of particle-hole and mesonic modes in eta mesic nuclei
• Study of π^{-}p \to ηn at low energies in a chiral constituent quark model
• Eta, eta-prime photoproduction and electroproduction off nucleons
• On the Coupling of the $\eta$ Meson to the Nucleon
• Singularity structure of the pi N scattering amplitude in a meson-exchange model up to energies W < 2.0 GeV
• $\eta$-Deuteron Scattering
• Realistic Few-Body Physics in the $dd\to \alpha {\pi }^0$ Reaction
• Standard model contribution to the electric dipole moment of the deuteron, ${}^3$H, and ${}^3$He nuclei
• Sum rule for the backward spin polarizability of the nucleon from a backward dispersion relation
• $\Lambda N\to NN$ weak interaction in effective field theory
• The $K^{-}p\to \eta \Lambda$ reaction in an effective Lagrangian model
• Search for Quasi Bound $\eta$ Mesons
• Quark model approach to the $\eta$ meson electroproduction on the proton
• A Covariant OBE Model for $\eta$ Production in NN Collisions
• eta-meson photoproduction off protons and deuterons
• Vector Meson Photoproduction with a Linearly Polarized Beam
• Isobar model analysis of pi0-eta photoproduction on protons
• The role of the $P_{11}(1710)$ in the $NN\to N\Sigma K$ reaction
• The $\eta NN$ coupling constant
• Low-energy scattering and photoproduction of $\eta$-mesons on three-body nuclei
• Combined study of gamma p to eta p and pi-p to eta n in a chiral constituent quark approach
• Comments on differential cross section of phi-meson photoproduction at threshold
• Electromagnetic Production of the Hypertriton
• Photoproduction of phi meson off deuteron near threshold
• Influence of final state interaction on incoherent η-photoproduction on the deuteron near threshold
• Electric dipole moment of the deuteron in the standard model with $NN-\Lambda N-\Sigma N$ coupling
• Extraction of the Ratio of the N^*(1535) Electromagnetic Helicity Amplitudes from Eta Photoproduction off Neutrons and Protons
• Photoproduction of ηmesons on protons in the resonance region:The background problem and the third S_11 resonance
• Final state interactions in the eta-d system
• Coherent $\eta$-photoproduction on ${}^4$He and ${}^{12}$C in the near-threshold region
• Coherent Photoproduction of Eta-Mesons on Spin-Zero Nuclei in a Relativistic, Non-local Model
• eta N S-wave scattering length in a three coupled channel, multiresonance, unitary model
• Novel Weak Decays in Doubly Strange Systems
• $\eta$ production off the proton in a Regge-plus-chiral quark approach
• Dynamical Interpretation of the Nucleon-Nucleon Interaction and Exchange Currents in the Large $N_C$ Limit
• Quasifree Eta Photoproduction from Nuclei
• Coherent eta photoproduction on the deuteron in the $S_{11}$ resonance region
• Interference and nuclear medium effects on the eta-mesic nuclear spectrum
• Asymmetries in phi photoproduction and the OZI violation
• Final state interaction in the reaction NN -> eta NN
• Sidewise dispersion relations and the structure of the nucleon vertex
• An EFT for the weak $\Lambda N$ interaction
• The ${\eta }^{\prime }$ Photoproduction off the Nucleon in the quark model
• Two-body effects in coherent eta-meson photoproduction on the deuteron in the region of the S_11(1535) resonance
• The Coupling of eta Mesons to Quarks and Baryons from D_s^* -> D_s pi^0 Decay
• Eta Photoproduction as a Test of the Extended Chiral Symmetry
• Possible molecular states from the $N\Delta$ interaction
• Nuclear dependence of the coherent eta photoproduction reaction in a relativistic approach
• Combined analysis of the ${\pi }^{-}p\to K^0\Lambda$, $\eta n$ reactions in a chiral quark model
• Energy dependent analysis of eta-meson photoproduction on protons and neutrons without background in the energy region up to 3.4 GeV
• Relativistic Calculations for the Exclusive Photoproduction of Eta Mesons from Complex Nuclei
• Instantons As Unitary Spin Maker
• Relativistic description of the np to eta d reaction near threshold
• Coherent Photoproduction of eta-mesons on Three-Nucleon Systems
• The Okamoto-Nolen-Schiffer anomaly without rho-omega mixing
• Charged current (anti)neutrino induced eta production off the nucleon
• Nucleon-Meson Couplings in One Boson Exchange Potential using Non-Critical String Theory
• Strange Isosinglet Versus Octet Scalar Axial Current
• Rescattering effects in coherent eta-photoproduction on the deuteron
• Chiral quark model approach for the study of baryon resonances
• Quasifree eta photoproduction from nuclei and medium modifications of resonances
• Experimental study of $\eta$ meson photoproduction reaction at MAMI
• Neutral Meson Photoproduction in $S{U}_f(3)$ $\chi$PT
• Exploration of hyperfine interaction between constituent quarks via eta productions