Dynamical coupled channel calculation of pion and omega meson production

Abstract

A dynamical coupled channel approach is used to study $\pi$ and $\omega$--meson production induced by pions and photons scattering from the proton. Six intermediate channels including $\pi N$, $\eta N$, $\pi \Delta$, $\sigma N$, $\rho N$ and $\omega N$ are employed to describe unpolarized and polarized data. Bare parameters in an effective hadronic Lagrangian are determined in a fit to data for $\pi N\to \pi N$, $\gamma N\to \pi N$, ${\pi }^{-}p\to \omega n$, and $\gamma p\to \omega p$ reactions at center-of-mass energies from threshold to $W<2.0$ GeV. The $T$ matrix determined in these fits is used to calculate the photon beam asymmetry for $\omega$-meson production and the $\omega N\to \omega N$ total cross section and $\omega N$ scattering lengths.

arXiv comment26 pages, 18 figures, submitted to Phys. Rev. C; corrected typos, added references, minor revisions, same results/figs

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Cited by in corpus (13)

• Coupled-channel dynamics in the reactions piN --> piN, etaN, KLambda, KSigma
• Photocouplings at the Pole from Pion Photoproduction
• Dynamical coupled-channel approaches on a momentum lattice
• Differential cross sections and spin density matrix elements for the reaction gamma p -> p omega
• Photoproduction of the $\omega$ meson off the proton near threshold
• Relevance of complex branch points for partial wave analysis
• Partial wave analysis of the reaction gamma p -> p omega$ and the search for nucleon resonances
• Nucleon resonances in $\gamma p\to \omega p$ reaction
• $\omega N$ scattering length from $\omega$ photoproduction on the proton near the threshold
• The reaction $\pi N\to \omega N$ in a dynamical coupled-channel approach
• Photon beam asymmetry $\Sigma$ in the reaction $\vec{\gamma }p\to p\omega$ for $E_{\gamma }$ = 1.152 to 1.876 GeV
• Measurement of the Σ beam asymmetry for the ω photo-production off the proton and the neutron at GRAAL
• Combined analysis of eta and eta-prime hadro- and photo-production off nucleons