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

被引：82

作者：

Hanhart, C. ^{[1
,2
]}

Kalashnikova, Yu S. ^{[3
]}

Nefediev, A. V. ^{[3
]}

机构：

[1] Forschungszentrum Julich, Inst Kernphys Theorie, Inst Adv Simulat, D-52425 Julich, Germany

[2] Julich Ctr Hadron Phys, D-52425 Julich, Germany

[3] Inst Theoret & Expt Phys, Moscow 117218, Russia

来源：

EUROPEAN PHYSICAL JOURNAL A | 2011年 / 47卷 / 08期

关键词：

S-MATRIX; PARTICLES;

D O I：

10.1140/epja/i2011-11101-9

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

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.

引用

页数：10

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