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Albaladejo, M; Guo, FK; Hidalgo-Duque, C; Nieves, J2
Z(c)(3900): What has been really seen?
Source PublicationPHYSICS LETTERS B
AbstractThe 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.
Subject AreaAstronomy & Astrophysics ; Physics
Indexed BySCI
Funding OrganizationThousand 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]
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Document Type期刊论文
Affiliation1.[Albaladejo, Miguel
2.Hidalgo-Duque, Carlos
3.Ctr Mixto CSIC Univ Valencia, Inst Invest Paterna, Inst Fis Corpuscular, Aptd 22085, E-46071 Valencia, Spain
4.Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
5.Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany
6.Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany
Recommended Citation
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.(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.
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