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题名: Distinguishing near-threshold pole effects from cusp effects
作者: Zhou, ZY;  Xiao, ZG
刊名: PHYSICAL REVIEW D
出版日期: 2015
卷号: 92, 期号:9, 页码:94024
学科分类: Astronomy & Astrophysics ;  Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.92.094024
通讯作者: Zhou, ZY (reprint author), Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China.
文章类型: Article
英文摘要: We make use of a unitarized coupled-channel model to analyze the mass distribution data of final states in production processes of X(4260). By analyzing the analytical structures of the decay amplitudes, we find that the line shape of the Z(c)(3900) signal is related to the combined effect of a pair of near-threshold "shadow" poles and the (D (D) over bar*)(+/-) thresholds, in which the third-sheet pole might provide a dominant contribution. As all the coupled channels effects are tuning off, the trajectories of these two poles suggest that the Z(c)(3900) might originate from the attractive interaction of (D*(D) over bar*)(+/-) through a long-distance interaction, e.g., pi-exchange interaction, as a "deuteron-like" state. There is no nearby pole structure corresponding to the Z(c)(4025) signal in the (D*(D) over bar*)(+/-) mass distribution.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: STATES
收录类别: SCI
项目资助者: National Natural Science Foundation of China [11375044, 11105138, 11235010, 11575177]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20787
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Zhou, ZY,Xiao, ZG. Distinguishing near-threshold pole effects from cusp effects[J]. PHYSICAL REVIEW D,2015,92(9):94024.
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