Practical Parametrization for Line Shapes of Near-Threshold States

被引：49

作者：

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

Kalashnikova, Yu S. ^{[3
]}

Matuschek, P. ^{[1
,2
]}

Mizuk, R. V. ^{[3
,4
,5
]}

Nefediev, A. V. ^{[3
,4
,5
]}

Wang, Q. ^{[1
,2
]}

机构：

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

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

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

[4] Natl Res Nucl Univ, MEPhI, Moscow 115409, Russia

[5] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 115卷 / 20期

基金：

俄罗斯科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.115.202001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Numerous quarkonium(like) states lying near S-wave thresholds are observed experimentally. We propose a self-consistent approach to these near-threshold states compatible with unitarity and analyticity. The underlying coupled-channel system includes a bare pole and an arbitrary number of elastic and inelastic channels treated fully nonperturbatively. The resulting analytical parametrization is ideally suited for a combined analysis of the data available in various channels that is exemplified by an excellent overall description of the data for the charged Z(b)(10610) and Z(b)(10650) states.

引用

页数：5

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