期刊
EUROPEAN PHYSICAL JOURNAL A
卷 44, 期 1, 页码 93-103出版社
SPRINGER
DOI: 10.1140/epja/i2010-10929-7
关键词
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资金
- Helmholtz Association [VH-NG-222, VH-VI-231]
- DFG [SFB/TR 16, 436 RUS 113/991/0-1]
- EU
- RFFI [RFFI-09-02-91342-NNIOa, RFFI-09-02-00629a]
- Presidential programme [NSh-4961.2008.2, NSh-4568.2008.2]
- State Corporation of Russian Federation Rosatom
- Dynasty foundation
- ICFPM [PTDC/FIS/70843/2006-Fisica]
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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