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.

arXiv comment12 pages,5 tables,2 figures. arXiv admin note: substantial text overlap with arXiv:1401.1947, arXiv:1404.1544

References in corpus (17)

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Cited by in corpus (16)

• 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
• Baryon transition form factors at the pole
• The f0(1370) controversy from dispersive meson-meson scattering data analyses
• $N^{\ast }$ resonances from $K\Lambda$ amplitudes in sliced bins in energy
• Generalization of the model-independent Laurent-Pietarinen single-channel pole-extraction formalism to multiple channels
• Regge phenomenology of the $N^{\ast }$ and ${\Delta }^{\ast }$ poles
• Application of the single-channel, single-energy AA/PWA method to $K^{+}\Lambda$ photoproduction
• Quark model study of the $\pi N\to \pi N$ reactions up to the $N(1440)$ resonance region
• Laurent+Pietarinen Partial Wave Analysis
• Dynamical generation of resonances in the P33 partial wave
• Dispersive determination of resonances from $\pi \pi$ scattering data
• The $\Lambda (1405)$ resonance as a genuine three-quark or molecular state
• Resonance Extraction from the SAID Analysis