2007/01/01 by R. L. Jaffe, Pietro Colangelo, D. Creanza +4 · 49 citations
Physics and Astronomy · #Hadron #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quantum, superfluid, helium dynamics #Scattering #hep-ph
paper · pdf · doi:10.1063/1.2823850
published in AIP conference proceedings 964, 1-13 (American Institute of Physics) · 18 pages, 10 figures, talk presented at the 2006 Yukawa International Seminar: New Frontiers in QCD, Kyoto University, November 2006. This talk is dedicated to the memory of R. H. Dalitz
openalex publication_date 2007/01/01 · arxiv created 2007/01/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Resonances and enhancements in meson‐meson scattering can be divided into two classes distinguished by their behavior as the number of colors (Nc) in QCD becomes large: The first are ordinary mesons that become stable as Nc→∞. This class includes textbook q̄q mesons as well as glueballs and hybrids. The second class, extraordinary mesons, are enhancements that disappear as Nc→∞; they subside into the hadronic continuum. This class includes indistinct and controversial objects that have been classified as qq¯qq mesons or meson‐meson molecules. Ordinary mesons resemble Feshbach resonances while extraordinary mesons look more like effects due to potentials in meson‐meson scattering channels. I build and explore toy models along these lines.