The nature of near-threshold XYZ states

被引：1

作者：

Cleven, Martin ^{[1
,2
]}

Guo, Feng-Kun ^{[3
,4
,5
]}

Hanhart, Christoph ^{[6
,7
]}

Wang, Qian ^{[6
,7
]}

Zhao, Qiang ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China

[3] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

[4] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany

[5] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China

[6] Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany

[7] Forschungszentrum Julich, Inst Adv Simulat, D-52425 Julich, Germany

来源：

PROCEEDINGS OF THE 10TH INTERNATIONAL WORKSHOP ON THE PHYSICS OF EXCITED NUCLEONS (NSTAR2015) | 2016年

关键词：

Exotic mesons; Meson-meson interactions;

D O I：

10.7566/JPSCP.10.010017

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 demonstrate that the recently observed X, Y, Z states cannot be purely from kinematic effect. Especially the narrow near-threshold structures in elastic channels call for nearby poles of the S - matrix which can be used to distinguish them from the normal kinematic cusp effect. In addition, it is also discussed how spectra can be used to distinguish different scenarios proposed for the structure of those poles, such as hadro-quarkonia, tetraquarks and hadronic molecules. The basic tool employed is heavy quark spin symmetry.

引用

页数：8

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