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Interplay of quark and meson degrees of freedom in a near-threshold resonance

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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.

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Authors and Affiliations

  1. Institute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117218, Moscow, Russia

    V. Baru, Yu. S. Kalashnikova, A. E. Kudryavtsev & A. V. Nefediev

  2. Institut für Kernphysik (Theorie) and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany

    V. Baru & C. Hanhart

Authors
  1. V. Baru
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  2. C. Hanhart
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  3. Yu. S. Kalashnikova
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  4. A. E. Kudryavtsev
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  5. A. V. Nefediev
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Corresponding author

Correspondence to A. V. Nefediev.

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Communicated by V. Vento

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Baru, V., Hanhart, C., Kalashnikova, Y.S. et al. Interplay of quark and meson degrees of freedom in a near-threshold resonance. Eur. Phys. J. A 44, 93–103 (2010). https://doi.org/10.1140/epja/i2010-10929-7

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  • DOI: https://doi.org/10.1140/epja/i2010-10929-7

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