Updated determination of N* resonance parameters using a unitary, multichannel formalism

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Abstract
Results are presented for an updated multichannel energy-dependent partial-wave analysis of πN scattering. Our earlier work incorporated single-energy amplitudes for πN→πN, γN→πN, πN→ππN, πN→ηN, and πN→KΛ. The present work incorporates new single-energy solutions for γp→ηp up to a center-of-mass (c.m.) energy of 1990 MeV, γp→K+Λ up to a c.m. energy of 2230 MeV, and γn→ηn up to a c.m. energy of 1885 MeV, as well as updated single-energy solutions for πN→ηN, πN→KΛ, and γN→πN. 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.
Funding Information
  • U.S. Department of Energy (DE-FG02-01ER41194, DE-SC0014323)
  • Office of Science
  • Kent State University

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