2005/07/22 by Thomas D. Cohen, Richard F. Lebed · 18 citations
Physics and Astronomy · #Baryon #High-Energy Particle Collisions Research #Multiplet #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Resonance (particle physics) #Spectral line #hep-ph
paper · pdf · doi:10.1103/physrevd.72.056001
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 72(5) (American Physical Society) · 26 pages, ReVTeX
arxiv created 2005/07/22 · openalex publication_date 2005/09/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We examine the multiplet structure and decay channels of baryon resonances in the large Nc QCD generalization of the Nc=3 SU(6) spin-flavor 70. We show that this ``70,'' while a construct of large Nc quark models, actually consists of five model-independent irreducible spin-flavor multiplets in the large Nc limit. The preferred decay modes for these resonances fundamentally depend upon which of the five multiplets to which the resonance belongs. For example, there exists an SU(3) ``8'' of resonances that is \ensuremathη-philic and \ensuremathπ-phobic, and an ``8'' that is the reverse. Moreover, resonances with a strong SU(3) ``1'' component prefer to decay via a K rather than via a \ensuremathπ. Remarkably, available data appears to bear out these conclusions.