articleLanzhou University Institutional RepositoryJun 10, 2016Closed access

The hidden-charm pentaquark and tetraquark states

CHChen, HXCWChen, WLXLiu, XZSZhu, SL

Peking University · State Key Laboratory of Nuclear Physics and Technology · +5 more institutions

Abstract

In the past decade many charmonium-like states were observed experimentally. Especially those charged charmonium-like Z(c) states and bottomonium-like Z(b) states cannot 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…

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Authors

4
  • CH
    Chen, HX

    Peking University, State Key Laboratory of Nuclear Physics and Technology, Beihang University

  • CW
    Chen, W

    University of Saskatchewan

  • LX
    Liu, XCorresponding

    Institute of Modern Physics, Lanzhou University

  • ZS
    Zhu, SLCorresponding

    Peking University, Collaborative Innovation Center of Quantum Matter, State Key Laboratory of Nuclear Physics and Technology

Topics & keywords

Topics
Keywords
  • Tetraquark
  • Pentaquark
  • Physics
  • Particle physics
  • Charm (quantum number)
  • Meson
  • Charm quark
  • Quark model
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