Effective Lagrangian approach to the omega meson photoproduction near threshold

Abstract

We apply the effective Lagrangian approach to investigate the role of the nucleon resonances in $\omega$ meson photoproduction at energies near the threshold. The resonant amplitudes are calculated from effective Lagrangians with the gamma NN* and omega NN* coupling constants fixed by the empirical helicity amplitudes and the vector meson dominance model. The contributions from the nucleon resonances are found to be significant in changing the differential cross sections in a wide interval of t and various spin observables.

25 pages, 10 figures

References in corpus (2)

• Form factors and photoproduction amplitudes
• Effect of form factors in fits to photoproduction data

Cited by in corpus (29)

• 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
• 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
• Differential cross sections and spin density matrix elements for the reaction gamma p -> p omega
• Light Baryon Spectroscopy
• Photoproduction of the $\omega$ meson off the proton near threshold
• Spin effects and baryon resonance dynamics in phi-meson photoproduction at few GeV
• Partial wave analysis of the reaction gamma p -> p omega$ and the search for nucleon resonances
• Spin-5/2 resonance contributions to the pion-induced reactions for energies $\sqrt{s}⩽$2.0 GeV
• $\varphi$ photoprodution with coupled-channel effects
• Near-threshold $\omega$ and $\varphi$ meson productions in $pp$ collisions
• Coherent Theta^+ and Lambda(1520) photoproduction off the deuteron
• $N^{\ast }$ decays to $N\omega$ from new data on $\gamma p\to \omega p$
• Dimuon production by laser-wakefield accelerated electrons
• Beam asymmetry in near threshold omega photoproduction off the proton
• K*Sigma photoproduction off the proton target with baryon resonances
• Nucleon resonances in $\gamma p\to \omega p$ reaction
• eta photoproduction and N* resonances
• Vector meson photoproduction studied in its radiative decay channel
• Channel coupling effects in $\rho$-meson photoproduction
• Polarization degrees of freedom in near-threshold photoproduction of omega mesons in the pi^0 gamma decay channel
• Measurement of the Σ beam asymmetry for the ω photo-production off the proton and the neutron at GRAAL
• Features of $\omega$ photoproduction off nucleon target at forward angles : Dominance of $\pi$ exchange with Regge cuts and scaling of differential cross sections
• Some aspects of ${\Theta }^{+}$ parity determination in the reaction $\gamma N\to {\Theta }^{+}\bar{K}\to NK\bar{K}$
• Features of forward $\pi N$ scattering from a Reggeized model
• Selected vector-meson decay-distributions in reactions of polarized photons with protons
• In-medium modification and decay asymmetry of omega mesons in cold nuclear matter
• A new nucleon resonance in eta photoproduction
• First Measurements of the Double-Polarization Observables $F$, $P$, and $H$ in $\omega$ Photoproduction off Transversely Polarized Protons in the $N^{\ast }$ Resonance Region