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24 April 2024

» arxiv » 1001.0369

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Interplay of quark and meson degrees of freedom in a near-threshold resonance
V. Baru ; C. Hanhart ; Yu.S. Kalashnikova ; A.E. Kudryavtsev ; A.V. Nefediev ;
Date:	3 Jan 2010
Abstract:	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.
Source:	arXiv, 1001.0369
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