2006/09/30 by J. A. Oller, Jose A. Oller, Joaquim Prades +2
Physics and Astronomy · #Baryon #Chiral perturbation theory #Cold Atom Physics and Bose-Einstein Condensates #Meson #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Scattering #Strangeness #Theoretical physics #Unitary state #hep-ph #nucl-th
paper · pdf · doi:10.1140/epja/i2006-10185-6
published as Eur.Phys.J.A31:527-533,2007 · 6 figures, 3 figures, talk given in the IVth International Conference on Quarks and Nuclear Physics (QNP06), Madrid June 5th and 10th, 2006. One reference is updated
arxiv created 2007/02/20 · openalex publication_date 2007/02/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider meson-baryon interactions in S-wave with strangeness -1. This is a sector populated by plenty of resonances interacting in several two-body coupled channels. We consider a large set of experimental data, where the recent experiments are remarkably accurate. This requires a sound theoretical description to account for all the data and we employ Unitary Chiral Perturbation Theory up to and including O(p2). The spectroscopy of our solutions is studied within this approach, discussing the rise from the pole content of two Λ(1405) resonances and of the Λ(1670), Λ(1800), Σ(1480), Σ(1620) and Σ(1750). We finally argue about our preferred fit.