Lanzhou University Institutional Repository· 2016
The hidden-charm pentaquark and tetraquark states
- 1,112citations
- 2016year
Short summary
New experimental observations of hidden-charm pentaquark and tetraquark states challenge the naive quark model, suggesting complex multiquark structures.
AI-generated from the title and abstract; the full text is not read.
Key points
- Experimental observation of charmonium-like Z(c) and bottomonium-like Z(b) states challenges the naive quark model.
- LHCb Collaboration discovered two hidden-charm pentaquark states, also beyond the quark model.
- These states are candidates for tetraquark, pentaquark, or molecular structures.
- The paper reviews experimental progress and theoretical interpretations of these multiquark states.
AI-generated from the title and abstract; the full text is not read.
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 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. (C) 2016 Elsevier B.V. All rights reserved.
The authors' abstract, as published at the source. Lanzhou University Institutional Repository, 2016 · DOI ↗
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Field: Nuclear and High Energy Physics
Nuclear and High Energy PhysicsPhysics and Astronomy