Updated determination of $N^{\ast }$ resonance parameters using a unitary, multichannel formalism

Abstract

Results are presented for an updated multichannel energy-dependent partial-wave analysis of $\pi N$ scattering. Our earlier work incorporated single-energy amplitudes for $\pi N\to \pi N$, $\gamma N\to \pi N$, $\pi N\to \pi \pi N$, $\pi N\to \eta N$, and $\pi N\to K\Lambda$. The present work incorporates new single-energy solutions for $\gamma p\to \eta p$ up to a c.m.\ energy of 1990~MeV, $\gamma p\to K^{+}\Lambda$ up to a c.m.\ energy of 2230~MeV, and $\gamma n\to \eta n$ up to a c.m.\ energy of 1885~MeV, as well as updated single-energy solutions for $\pi N\to \eta N$, $\pi N\to K\Lambda$, and $\gamma N\to \pi N$. In this paper, we present and discuss the resonance parameters obtained from a combined fit of all these single-energy amplitudes. Our determined energy-dependent amplitudes provide an excellent description of the corresponding measured observables.

arXiv comment41 pages, 26 figures

References in corpus (14)

• Extended Partial-Wave Analysis of piN Scattering Data
• Properties of baryon resonances from a multichannel partial wave analysis
• Unified description of light- and strange-baryon spectra
• The light baryon spectrum in a relativistic quark model with instanton-induced quark forces I. The non-strange baryon spectrum and ground-states
• Strange Decays of Nonstrange Baryons
• Dynamical Coupled-Channel Model of $\pi N$ Scattering in the W $\le$ 2 GeV Nucleon Resonance Region
• Unified Chew-Mandelstam SAID analysis of pion photoproduction data
• Eta photoproduction in a combined analysis of pion- and photon-induced reactions
• Multichannel parametrization of πN scattering amplitudes and extraction of resonance parameters
• High statistics study of the reaction $\gamma p\to p2{\pi }^0$
• Measurement of pi^0 photoproduction on the proton at MAMI C
• Partial-wave analysis of π-p {\to} ηn and π-p {\to} K0Λ reactions
• Partial-Wave Analysis of $\gamma p\to K^{+}\Lambda$ using a multichannel framework
• Partial-wave analyses of $\gamma p\to \eta p$ \ and $\gamma n\to \eta n$ using a multichannel framework

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