Stability of the Zagreb Carnegie-Mellon-Berkeley model

Abstract

In ref. [1] we have used the Zagreb realization of Carnegie-Melon-Berkeley coupled-channel, unitary model as a tool for extracting pole positions from the world collection of partial wave data, with the aim of eliminating model dependence in pole-search procedures. In order that the method is sensible, we in this paper discuss the stability of the method with respect to the strong variation of different model ingredients. We show that the Zagreb CMB procedure is very stable with strong variation of the model assumptions, and that it can reliably predict the pole positions of the fitted partial wave amplitudes.

25 pages, 12 figures, 19 tables

References in corpus (11)

• Extended Partial-Wave Analysis of piN Scattering Data
• 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
• Dynamical Coupled-Channel Model of $\pi N$ Scattering in the W $\le$ 2 GeV Nucleon Resonance Region
• Partial decay widths of baryons in the spin-momentum operator expansion method
• Relevance of complex branch points for partial wave analysis
• Nucleon resonances in πN scattering up to energies \sqrt(s) < 2.0 GeV
• Partial decay widths of baryons in the spin-momentum operator expansion method
• The physical meaning of scattering matrix singularities in coupled-channel formalisms
• The piN --> etaN data demand the existence of N(1710) P11 resonance reducing the 1700 MeV continuum ambiguity
• Poles, the only true resonant-state signals, are extracted from a worldwide collection of partial wave amplitudes using only one, well controlled pole-extraction method

Cited by in corpus (4)

• The chiral representation of the $\pi N$ scattering amplitude and the pion-nucleon sigma term
• Strong decay of low-lying $S_{11}$ and $D_{13}$ nucleon resonances to pseudoscalar mesons and octet baryons
• ${\gamma }^{\ast }N\to N(1710)$ transition at high momentum transfer
• Poles, the only true resonant-state signals, are extracted from a worldwide collection of partial wave amplitudes using only one, well controlled pole-extraction method