2010/01/31 by V. Baru, C. Hanhart, Yu. S. Kalashnikova +2 · 1 citation
Physics and Astronomy · #Degrees of freedom (physics and chemistry) #High-Energy Particle Collisions Research #Lattice QCD #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Resonance (particle physics) #Scattering #hep-ph
paper · pdf · doi:10.1140/epja/i2010-10929-7
published as Eur.Phys.J.A44:93-103,2010 · LaTeX2e, 11 pages, minor typo corrections, to appear in Eur.Phys.J.A
arxiv created 2010/02/03 · openalex publication_date 2010/02/19 · arxiv updated 2010/04/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the interplay of quark and meson degrees of freedom in a physical state representing a near-threshold resonance for the case of a single continuum channel. We demonstrate that such a near-threshold resonance may possess quite peculiar properties if both quark and meson dynamics generate weakly coupled near-threshold poles in the S-matrix. In particular, the scattering t-matrix may possess zeros in this case. We also discuss possible implications for production reactions as well as studies within lattice QCD.