The reaction $\pi N\to \omega N$ in a dynamical coupled-channel approach

Abstract

A refined investigation on light flavor meson-baryon scatterings is performed using a dynamical coupled-channel approach, the Jülich-Bonn model, that respects unitartiy and analyticity constraints. The channel space of $\pi N$, $\pi \Delta$, $\sigma N$, $\rho N$, $\eta N$, $K\Lambda$ and $K\Sigma$ is extended by adding the $\omega N$ final state. The spectra of $N^{\ast }$ and $\Delta$ resonances are extracted in terms of complex poles of the scattering amplitudes, based on the result of a global fit to a worldwide collection of data, in the energy region from the $\pi N$ threshold to center-of-mass energy $z=2.3$ GeV. A negative value of the $\omega N$ elastic spin-averaged scattering length is extracted, questioning the existence of bound states of the $\omega$ meson in the nuclear matter.

23 pages, 16 figures, one supplemental material

References in corpus (20)

• Extended Partial-Wave Analysis of piN Scattering Data
• Electromagnetic excitation of the Delta(1232)-resonance
• In-medium nuclear interactions of low-energy hadrons
• Dynamical coupled-channel model of meson production reactions in the nucleon resonance region
• Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model
• Chiral dynamics of the S11(1535) and S11(1650) resonances revisited
• Chiral perturbation theory
• Meson-nucleus potentials and the search for meson-nucleus bound states
• Analyses of pion-nucleon elastic scattering amplitudes up to $O(p^4)$ in extended-on-mass-shell subtraction scheme
• Eta photoproduction in a combined analysis of pion- and photon-induced reactions
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• Photoproduction of the $\omega$ meson off the proton near threshold
• The spectral function of the omega meson in nuclear matter from a coupled-channel resonance model
• Jülich-Bonn-Washington Model for Pion Electroproduction Multipoles
• Chiral corrections to the Roper mass
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
• Resonances in heavy meson - heavy baryon coupled-channel interactions
• Dynamical coupled channel calculation of pion and omega meson production
• Resonance parameters from K-matrix and T-matrix poles
• On Lowest Lying ${\frac{1}{2}}^{-}$ Octet Baryons

Cited by in corpus (5)

• Accessing the strong interaction between $\Lambda$ baryons and charged kaons with the femtoscopy technique at the LHC
• Review of the low-lying excited baryons ${\Sigma }^{\ast }(1/2^{-})$
• Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom
• Global Data-Driven Determination of Baryon Transition Form Factors
• Coupled-channel contributions to the GDH sum rule from the Jülich-Bonn approach