Low-energy scattering of the (D(D)over-bar)± system and the resonancelike structure Zc(4025)

被引：23

作者：

Chen, Ying ^{[1
]}

Gong, Ming ^{[1
]}

Lei, Yu-Hong ^{[2
]}

Li, Ning ^{[3
]}

Liang, Jian ^{[1
]}

Liu, Chuan ^{[4
,5
,6
]}

Liu, Jin-Long ^{[2
]}

Liu, Yong-Fu ^{[2
]}

Liu, Yu-Bin ^{[7
]}

Liu, Zhaofeng ^{[1
]}

Ma, Jian-Ping ^{[8
]}

Wang, Zhan-Lin ^{[2
]}

Zhang, Jian-Bo ^{[9
]}

机构：

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

[2] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[3] Xian Technol Univ, Sch Sci, Xian 710032, Peoples R China

[4] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

[5] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China

[6] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

[7] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China

[8] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China

[9] Zhejiang Univ, Dept Phys, Hangzhou 311027, Zhejiang, Peoples R China

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 05期

基金：

美国国家科学基金会;

关键词：

MOLECULE; STATES;

D O I：

10.1103/PhysRevD.92.054507

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, low-energy scattering of the (D*(D) over bar*)(+/-) meson system is studied within Luscher's finite-size formalism using N-f = 2 twisted-mass gauge field configurations. With three different pion mass values, the s-wave threshold scattering parameters-namely the scattering length a(0) and the effective range r(0)-are extracted in the J(PC) = 1(+-) channel. Our results indicate that, in this particular channel, the interaction between the two vector charmed mesons is weakly repulsive in nature and hence it does not support the possibility of a shallow bound state for the two mesons, at least for the pion mass values being studied. However, these results might suffer from undetermined systematic errors due to low-lying states ignored in this exploratory study. Still, it provides some useful information on the nature of the newly discovered resonance-like structure Z(c)(4025) observed in various experiments.

引用

页数：13

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Low-energy scattering of the (D*(D)over-bar*)± system and the resonancelike structure Zc(4025)

Low-energy scattering of the (D(D)over-bar)± system and the resonancelike structure Zc(4025)