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.

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

References in corpus (5)

• Extended Partial-Wave Analysis of piN Scattering Data
• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• Dynamical Coupled-Channel Model of $\pi N$ Scattering in the W $\le$ 2 GeV Nucleon Resonance Region
• The spectral function of the omega meson in nuclear matter from a coupled-channel resonance model
• Nucleon resonances in πN scattering up to energies \sqrt(s) < 2.0 GeV

Cited by in corpus (5)

• Photoproduction of the $\omega$ meson off the proton near threshold
• Relevance of complex branch points for partial wave analysis
• 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
• Combined analysis of eta and eta-prime hadro- and photo-production off nucleons