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doi:10.1103/physrevlett.115.222002

Cited by 81 publications

(43 citation statements)

References 31 publications

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“…[61]. BESIII also reported a neutral state Z c (3885) 0 in the e + e − → (DD * ) 0 π 0 process with the mass M = (3885.7 +4.3 −5.7 ± 8.4) MeV and width Γ = (35 +11 −12 ± 15) MeV [165]. Besides, a search for the Z c (3900) ± state in the exclusive production process by virtual photons was performed in the channel Z c (3900) ± → J/ψπ ± at COMPASS [166].…”

Section: Charged Charmonium-like Z C Statesmentioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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Section: Charged Charmonium-like Z C Statesmentioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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“…A neutral structure in the DD * system around the DD * mass threshold, which is denoted as Z c (3885) 0 is observed in the process e + e − → π 0 (D +D * − ) and e + e − → π 0 (D 0D * 0 ) at √ s = 4.23 and 4.26 GeV [9]. As shown in the left plot of Fig.…”

Section: New Informations Of Z C Statesmentioning

confidence: 74%

Recent progress on exotic charmonium from BESIII

Guo¹

2016

Proceedings of XXIV International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2016)

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(On behalf of the BESIII collaboration) Deutsches Elektronen-Synchrotron, Hamburge, Gemmany Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China E-mail: guoaq@ihep.ac.cnThe BESIII experiment is an unique electron-position machine operating at τ-charm energy region. It has collected about 5 fb −1 data at centre-mass-energy between 3.8 and 4.6 GeV from 2011 and a series of charged exotic charmomium states, which were named as Z c states, were observed. These observations provide strong evidence that the new type of hadrons beyond meson and baryon exist. Besides, lots of new informations about neutral exotic states, labeled as XY states, were also observed. These observations include the new production mechanism of X(3872) and a candidate of ψ(1 3 D 2 ). Some new structures were also found from the cross section measurement in several exclusive processes. In this proceeding, we report these progresses from BESIII experiment in detail.

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“…and e + e − → D 0D * 0 π 0 + c.c. at √ s = 4.226 and 4.257 GeV the neutral structure Z c (3885) 0 was observed with the pole mass (3885.7 +4.3 −5.7 (stat)±8.4 (syst)) MeV/c 2 and pole width (35 +11 −12 (stat)±15 (syst)) MeV [35]. In a very recent study of D0 Collaboration, the authors presented evidence for the Z ± c (3900) state decaying to J/ψπ ± in semi-inclusive weak decays of b−flavored hadrons [36].…”

Section: Introductionmentioning

confidence: 92%

Properties of Zc(3900) tetraquark in a cold nuclear matter

Azizi

2020

Phys. Rev. D

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The study of medium effects on properties of particles embedded in nuclear matter is of great importance for understanding the nature and internal quark-gluon organization as well as exact determination of the quantum numbers of especially the exotic states. In this context, we study the physical properties of one of the famous charmonium-like states, Zc(3900), in a cold dense matter. We investigate the possible shifts in the mass and current-meson coupling of the Zc(3900) state due to the dense medium at saturation density, ρ sat , by means of the in-medium sum rules. We also estimate the vector self-energy of this stated at saturation nuclear matter density. We discuss the behavior of the spectroscopic parameters of this state with respect to the density up to a high density corresponding to the core of neutron stars, ρ ≈ 5ρ sat . Both the mass and current-coupling of this state show nonlinear behavior and decrease with respect to the density of the medium: the mass reach to 30% of its vacuum value at ρ = 5ρ sat , while the current-coupling approaches to zero at ρ ≈ 2.1ρ sat .

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Observation of a Neutral Structure near theDD¯*Mass Threshold ine+

Cited by 81 publications

References 31 publications

The hidden-charm pentaquark and tetraquark states

The hidden-charm pentaquark and tetraquark states

Recent progress on exotic charmonium from BESIII

Properties of Zc(3900) tetraquark in a cold nuclear matter

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