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

被引：0
|
作者：
V. Baru
C. Hanhart
Yu. S. Kalashnikova
A. E. Kudryavtsev
A. V. Nefediev
机构：
[1] Institute for Theoretical and Experimental Physics,Institut für Kernphysik (Theorie) and Jülich Center for Hadron Physics
[2] Forschungszentrum Jülich,undefined
来源：
The European Physical Journal A | 2010年 / 44卷
关键词：
Left Plot; Pole Structure; Belle Collaboration; Baru; Bare State;
D O I：
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学科分类号：
摘要：
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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页码：93 / 103
页数：10
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