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题名: Z(c)(3900): What has been really seen?
作者: Albaladejo, M ;  Guo, FK ;  Hidalgo-Duque, C ;  Nieves, J
刊名: PHYSICS LETTERS B
出版日期: 2016
卷号: 755, 页码:337-342
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1016/j.physletb.2016.02.025
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.
文章类型: Article
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.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Nuclear ;  Physics, Particles & Fields
关键词[WOS]: STATE
收录类别: SCI
项目资助者: Thousand Talents Plan for Young Professionals ;  JAE-CSIC Program ;  "Juan de la Cierva" program from the Spanish MINECO [27-13-463B-731] ;  DFG ;  NSFC [11261130311] ;  Spanish MINECO ;  European FEDER [FIS2011-28853-C02-02, FIS2014-51948-C2-1-P, FIS2014-57026-REDT, SEV-2014-0398] ;  Generalitat Valenciana [PROMETEOII/2014/0068] ;  EU HadronPhysics3 project [283286]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21695
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
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.
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