1995/07/24 by Norbert Kaiser, N. Kaiser, P. B. Siegel +1 · 13 citations
Physics and Astronomy · #Baryon #Energy (signal processing) #High-Energy Particle Collisions Research #Isospin #Lagrangian #Mathematical physics #Meson #Nucleon #Order (exchange) #Partial wave analysis #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Range (aeronautics) #Resonance (particle physics) #nucl-th
paper · pdf · doi:10.1016/0370-2693(95)01203-3
published as Phys.Lett. B362 (1995) 23-28 · 9 pages, 6 postscript figures, e-mail: [email protected] ; [email protected] [email protected]
arxiv created 1995/07/24 · openalex publication_date 1995/11/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The SU(3) chiral effective lagrangian at next-to-leading order is applied to the S-wave meson-baryon interaction in the energy range around the ηN threshold. Potentials are derived from this lagrangian and used in a coupled channel calculation of the πN, ηN, K Λ, K Σ system in the isospin-1/2, l=0 partial wave. Using the same parameters as obtained from a fit to the low energy K N data it is found that a quasi-bound K Σ-state is formed, with properties remarkably similar to the S11(1535) nucleon resonance. In particular, we find a large partial decay width into ηN consistent with the empirical data.