Distinguishing near-threshold pole effects from cusp effects

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	Distinguishing near-threshold pole effects from cusp effects
	Zhou, ZY; Xiao, ZG
刊名	PHYSICAL REVIEW D
	2015
卷号	92 期号:9 页码:94024
通讯作者	Zhou, ZY (reprint author), Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China.
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.
学科主题	Astronomy & Astrophysics ; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
关键词[WOS]	STATES
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/20787]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Zhou, ZY,Xiao, ZG. Distinguishing near-threshold pole effects from cusp effects[J]. PHYSICAL REVIEW D,2015,92(9):94024.
APA	Zhou, ZY,&Xiao, ZG.(2015).Distinguishing near-threshold pole effects from cusp effects.PHYSICAL REVIEW D,92(9),94024.
MLA	Zhou, ZY,et al."Distinguishing near-threshold pole effects from cusp effects".PHYSICAL REVIEW D 92.9(2015):94024.