Pole structure from energy-dependent and single-energy fits to $\pi N$ elastic scattering data

Abstract

The pole structure of the current GW/SAID partial-wave analysis of elastic $\pi N$ scattering and $\eta N$ production data is studied. Pole positions and residues are extracted from both the energy-dependent and single-energy fits, using two different methods. For the energy-dependent fits, both contour integration and a Laurent+Pietarinen approach are used. In the case of single-energy fits, the Laurent+Pietarinen approach is used. Errors are estimated and the two sets of results are compared to other recent and older fits to data.

12 pages,5 tables,2 figures. arXiv admin note: substantial text overlap with arXiv:1401.1947, arXiv:1404.1544

References in corpus (6)

• Extended Partial-Wave Analysis of piN Scattering Data
• Model independent extraction of the proton charge radius from electron scattering
• Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model
• Relevance of complex branch points for partial wave analysis
• Pole positions and residues from pion photoproduction using the Laurent+Pietarinen expansion method
• Analysis of averaged multichannel delay times

Cited by in corpus (10)

• Eta photoproduction in a combined analysis of pion- and photon-induced reactions
• Novel approaches in Hadron Spectroscopy
• Strong evidence for nucleon resonances near 1900\,MeV
• Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
• $N^{\ast }$ resonances from $K\Lambda$ amplitudes in sliced bins in energy
• The f0(1370) controversy from dispersive meson-meson scattering data analyses
• Application of the single-channel, single-energy AA/PWA method to $K^{+}\Lambda$ photoproduction
• Laurent+Pietarinen Partial Wave Analysis
• Dispersive determination of resonances from $\pi \pi$ scattering data
• The $\Lambda (1405)$ resonance as a genuine three-quark or molecular state