Nucleonic resonance excitations with linearly polarized photon in $\gamma p\to \omega p$

Abstract

In this work, an improved quark model approach to the $\omega$ meson photo-production with an effective Lagrangian is presented. The {\it t}-channel {\it natural}-parity exchange is taken into account through the Pomeron exchange, while the {\it unnatural}-parity exchange is described by the ${\pi }^0$ exchange. With a very limited number of parameters, the available experimental data in the low energy regime can be consistently accounted for. We find that the beam polarization observables show sensitivities to some {\it s}-channel individual resonances in the $SU(6)\otimes O(3)$ quark model symmetry limit. Especially, the two resonances $P_{13}(1720)$ and $F_{15}(1680)$, which belong to the representation $[56{,}^{2}8,2,2,J]$, have dominant contributions over other excited states. Concerning the essential motivation of searching for "missing resonances" in meson photo-production, this approach provides a feasible framework, on which systematic investigations can be done.

16 pages, Revtex, 9 eps figures, to appear in PRC

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Cited by in corpus (36)

• 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
• Strong decays of newly observed $D_{sJ}$ states in a constituent quark model with effective Lagrangians
• Light Baryon Spectroscopy
• Photoproduction of the $\omega$ meson off the proton near threshold
• Strong decays of the newly observed $D(2550)$, $D(2600)$, $D(2750)$, and $D(2760)$
• Strong decays of higher excited heavy-light mesons in a chiral quark model
• Rho meson photoproduction at low energies
• 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
• Mass spectra and strong decays of charmed and charmed-strange mesons
• Quark model predictions for $K^{\ast }$ photoproduction on the proton
• One-loop corrections to omega photoproduction near threshold
• Electric and magnetic form factors of strange baryons
• $N^{\ast }$ decays to $N\omega$ from new data on $\gamma p\to \omega p$
• Towards establishing an abundant $B$ and $B_s$ spectrum up to the second orbital excitations
• Measurement of the helicity asymmetry $E$ in $\omega \to {\pi }^{+}{\pi }^{-}{\pi }^0$ photoproduction
• Nucleon resonances in $\gamma p\to \omega p$ reaction
• Non-diffractive mechanisms in the $\varphi$ meson photoproduction on nucleons
• The reaction $\pi N\to \omega N$ in a dynamical coupled-channel approach
• Contributions of vector meson photoproduction to the Gerasimov-Drell-Hearn sum rule
• Measurement of the beam asymmetry $\Sigma$ and the target asymmetry $T$ in the photoproduction of $\omega$ mesons off the proton using CLAS at Jefferson Laboratory
• Vector meson photoproduction studied in its radiative decay channel
• Channel coupling effects in $\rho$-meson photoproduction
• Photon beam asymmetry $\Sigma$ in the reaction $\vec{\gamma }p\to p\omega$ for $E_{\gamma }$ = 1.152 to 1.876 GeV
• 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
• Near threshold electroproduction of the omega meson at Q2 ~ 0.5 GeV2
• Photoproduction of $\gamma p\to K^{+}{\Lambda }^{\ast }(1520)$ and decay of ${\Lambda }^{\ast }(1520)\to K^{-}p$ in the Reggeized framework
• 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
• pi and rho loop corrections to omega photoproduction in the resonance region
• First Measurements of the Double-Polarization Observables $F$, $P$, and $H$ in $\omega$ Photoproduction off Transversely Polarized Protons in the $N^{\ast }$ Resonance Region