2007/12/31 by Tetsuo Hyodo, Daisuke Jido, Luis Roca +1 · 1 citation
Physics and Astronomy · #Baryon #High-Energy Particle Collisions Research #Lambda #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Resonance (particle physics) #Singlet state #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevd.77.056010
published as Phys.Rev.D77:056010,2008 · RevTeX4, 4 pages, 2 figures, title changed, final version to appear in Phys. Rev. D
openalex publication_date 2008/03/27 · arxiv created 2008/03/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the behavior with the number of colors (Nc) of the two poles associated to the \ensuremathΛ(1405) resonance obtained dynamically within the chiral unitary approach. The leading order chiral meson-baryon interaction manifests a nontrivial Nc dependence for SU(3) baryons, which gives a finite attractive interaction in some channels in the large Nc limit. As a consequence, the SU(3) singlet (KN) component of the \ensuremathΛ(1405) survives in the large Nc limit as a bound state, while the other components dissolve into the continuum. The Nc dependence of the decay widths shows different behavior from the general counting rule for a qqq state, indicating the dynamical origin of the two poles for the \ensuremathΛ(1405) resonance.