Eta, eta-prime photoproduction and electroproduction off nucleons

Abstract

The photo- and electroproduction of eta, eta-prime mesons on nucleons are investigated within a relativistic chiral unitary approach based on coupled channels. The s-wave potentials for electroproduction and meson-baryon scattering are derived from a chiral effective Lagrangian which includes the eta-prime as an explicit degree of freedom and incorporates important features of the underlying QCD Lagrangian such as the axial U(1) anomaly. The effective potentials are iterated in a Bethe-Salpeter equation and cross sections for eta, eta-prime photo- and electroproduction from nucleons are obtained. The results for the eta-prime photoproduction cross section on protons reproduce the appearance of an S_{11} resonance around 1.9 GeV observed at ELSA. The inclusion of electromagnetic form factors increases the predicted eta electroproduction cross sections on the proton, providing a qualitative explanation for the hard form factor of the photocoupling amplitude observed at CLAS.

arXiv comment26 pages

References in corpus (30)

• Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited
• Non perturbative chiral approach to s-wave \bar{K}N interactions
• Chiral Symmetry Amplitudes in the S-Wave Isoscalar and Isovector Channels and the σ, f_0(980), a_0(980) Scalar Mesons
• Chiral symmetry amplitudes in the s-wave isoscalar and isovector channels and the $\sigma ,f_0(980),a_0(980)$ scalar mesons
• Chiral Dynamics and the Low Energy Kaon-Nucleon Interaction
• Meson-Meson interaction in a non-perturbative chiral approach
• SU(3) Chiral Dynamics with Coupled Channels: Eta and Kaon Photoproduction
• Chiral Dynamics and the $S_{11}(1535)$ Nucleon Resonance
• Large N_c in chiral perturbation theory
• Chiral unitary approach to S-wave meson baryon scattering in the strangeness S=0 sector
• Chiral expansion of baryon masses and $\sigma$-terms
• Bethe-Salpeter Approach for Unitarized Chiral Perturbation Theory
• Consistent Analysis of the Spin Content of the Nucleon
• Electroproduction of the Delta Resonance at High Momentum Transfer
• Decuplet Baryon Structure from Lattice QCD
• Effective Lagrangian Approach to the Theory of Eta Photoproduction in the $N^{\ast }(1535)$ Region
• The $\eta$NN Coupling in Eta Photoproduction
• Chiral Effective Lagrangian in the large-Nc limit: the nonet case
• The e p -> e' p eta reaction at and above the S11(1535) baryon resonance
• Bounds on the light quark masses
• Electroproduction of the S11(1535) Resonance at High Momentum Transfer
• Baryon axial currents
• Chiral SU(3) Dynamics with Coupled Channels: Inclusion of P-Wave Multipoles
• Photoproduction of the Eta-Prime Mesons as a New Tool to Probe Baryon Resonances
• Eta-eta' mixing in U(3) chiral perturbation theory
• The eta-prime -> eta pi pi decay in U(3) chiral perturbation theory
• The eta' in baryon chiral perturbation theory
• The ${\eta }^{\prime }$ Photoproduction off the Nucleon in the quark model
• Axial U(1) dynamics in eta and eta' photoproduction
• Threshold eta and eta' electroproduction off nucleons

Cited by in corpus (22)

• K^- p scattering length from scattering experiments
• Chiral dynamics of kaon-nucleon interactions, revisited
• Kaonic hydrogen and K^- p scattering
• Eta photoproduction in a combined analysis of pion- and photon-induced reactions
• Chiral dynamics in the gamma p --> pi^0 eta p and gamma p --> pi^0 K^0 Sigma^+ reactions
• A gauge invariant chiral unitary framework for kaon photo- and electroproduction on the proton
• $S=-1$ meson-baryon interaction and the role of isospin filtering processes
• Transition form factors of the N*(1535) as a dynamically generated resonance
• Photoproduction of eta meson within a coupled-channels K-matrix approach
• Analyzing eta' photoproduction data on the proton at energies of 1.5--2.3 GeV
• Hadronic decays of eta and eta-prime with coupled channels
• Gauge invariance in two-particle scattering
• The chiral S=-1 meson-baryon interaction with new constrains on the NLO contributions
• Eta-photoproduction in a gauge-invariant chiral unitary framework
• Final state interactions in nonleptonic hyperon decays
• Spectral function of the ${\eta }^{\prime }$ meson in nuclear medium based on phenomenological models
• Limitations of the heavy-baryon expansion as revealed by a pion-mass dispersion relation
• Baryon polarization in low-energy unpolarized meson-baryon scattering
• Effect of the final state interaction of ${\eta }^{\prime }N$ on the ${\eta }^{\prime }$ photoproduction off nucleon
• Polarized $p{K}^{-}$ scattering in Unitary Baryon Chiral Perturbation Theory
• Radiative decay into gamma-baryon of dynamically generated resonances from the vector-baryon interaction
• Nuclear Reactions at Intermediate Energies