Z(c)(3900): What has been really seen?

doi:http://dx.doi.org/10.1016/j.physletb.2016.02.025

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	Z(c)(3900): What has been really seen?
	Albaladejo, M; Guo, FK; Hidalgo-Duque, C; Nieves, J; Albaladejo, M (reprint author), Ctr Mixto CSIC Univ Valencia, Inst Invest Paterna, Inst Fis Corpuscular, Aptd 22085, E-46071 Valencia, Spain.
刊名	PHYSICS LETTERS B
	2016
卷号	755 页码:337-342
DOI	http://dx.doi.org/10.1016/j.physletb.2016.02.025
英文摘要	The Z(c)(+/-)(3900)/Z(c)(+/-)(3885) resonant structure has been experimentally observed in the Y(4260) -> J/Psi pi pi and Y(4260) -> (D) over bar* D pi decays. This structure is intriguing since it is a prominent candidate of an exotic hadron. Yet, its nature is unclear so far. In this work, we simultaneously describe the (D) over bar* D and J/Psi pi invariant mass distributions in which the Z(c) peak is seen using amplitudes with exact unitarity. Two different scenarios are statistically acceptable, where the origin of the Z(c) state is different. They correspond to using energy dependent or independent (D) over bar D S-wave interaction. In the first one, the Z(c) peak is due to a resonance with a mass around the D (D) over bar threshold. In the second one, the Z(c) peak is produced by a virtual state which must have a hadronic molecular nature. In both cases the two observations, Z(c)(+/-)(3900) and Z(c)(+/-)(3885), are shown to have the same common origin, and a (D) over bar D bound state solution is not allowed. Precise measurements of the line shapes around the D (D) over bar threshold are called for in order to understand the nature of this state. (C) 2016 The Authors. Published by Elsevier B.V.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21695]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Albaladejo, M (reprint author), Ctr Mixto CSIC Univ Valencia, Inst Invest Paterna, Inst Fis Corpuscular, Aptd 22085, E-46071 Valencia, Spain.
推荐引用方式 GB/T 7714	Albaladejo, M,Guo, FK,Hidalgo-Duque, C,et al. Z(c)(3900): What has been really seen?[J]. PHYSICS LETTERS B,2016,755:337-342.
APA	Albaladejo, M,Guo, FK,Hidalgo-Duque, C,Nieves, J,&Albaladejo, M .(2016).Z(c)(3900): What has been really seen?.PHYSICS LETTERS B,755,337-342.
MLA	Albaladejo, M,et al."Z(c)(3900): What has been really seen?".PHYSICS LETTERS B 755(2016):337-342.