Interplay of quark and meson degrees of freedom in a near-threshold resonance: Multi-channel case

被引：0
|
作者：
C. Hanhart
Yu. S. Kalashnikova
A. V. Nefediev
机构：
[1] Institute for Advanced Simulation,Forschungszentrum Jülich
[2] Institut für Kernphysik (Theorie) and Jülich Center for Hadron Physics,undefined
[3] Institute for Theoretical and Experimental Physics,undefined
来源：
The European Physical Journal A | 2011年 / 47卷
关键词：
Line Shape; Full Complexity; Baru; Quark State; Riemann Sheet;
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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 multiple continuum channels. The aim is to demonstrate the full complexity of possible near-threshold phenomena. It turns out that those are especially rich, if both quark and meson dynamics generate simultaneously weakly coupled near-threshold poles in the S-matrix. We study the properties of this scenario in detail, such as t-matrix and production amplitude zeros, as well as various effects of the continuum channels interplay.
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