A schematic model of baryons and mesons

Gell‐Mann, Murray

doi:10.1016/s0031-9163(64)92001-3

Cited by 2,542 publications

(1,460 citation statements)

References 10 publications

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“…In fact, at the birth of the quark model [18,19], Gell-Mann and Zweig proposed not only the existence of the qq mesons and qqq baryons but also the possible existence of the qqqq tetraquarks and qqqqq pentaquarks. The concept of the multiquarks was proposed even before the advent of quantum chromodynamics (QCD)!…”

Section: Exotic States and Multiquark Statesmentioning

confidence: 99%

“…In Ref. [18], M. Gell-Mann wrote: "Baryons can now be constructed from quarks by using the combinations (qqq), (qqqqq), etc., while mesons are made out of (qq), (qqqq), etc. "…”

Section: Exotic States and Multiquark Statesmentioning

confidence: 99%

“…At the birth of the quark model (QM), the multiquark states with configurations like (qqqq) and (qqqqq) were proposed together with the conventional mesons and baryons [18,182]. In general, the possible hadron configurations include…”

Section: Theoretical Interpretations Of the Hidden-charm Pentaquark Smentioning

confidence: 99%

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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: Exotic States and Multiquark Statesmentioning

confidence: 99%

“…In Ref. [18], M. Gell-Mann wrote: "Baryons can now be constructed from quarks by using the combinations (qqq), (qqqqq), etc., while mesons are made out of (qq), (qqqq), etc. "…”

Section: Exotic States and Multiquark Statesmentioning

confidence: 99%

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The hidden-charm pentaquark and tetraquark states

et al. 2016

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“…The concept of diquark was put forth and was extensively studied in strong interactions [11,12,13,14,15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

D and D _s in mass loaded flux tube

Shan

Zhang

2010

Chinese Phys. C

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Heavy-light hadrons are studied in a mass loaded flux tube model. The study indicates that the dynamics of mesons and baryons containing a c quark is well described by the mass loaded flux tube. The hypothesis of good diquark-antiquark degeneracy is found reasonable in heavy-light quark systems. The spectrum of charmed (D) and charmed strange (Ds) mesons is systematically computed. D and Ds in 1D multiplets are predicted to have lower masses in comparison with other theoretical predictions. The predicted masses of the 1 − (1 3 D1) and the 3 − (1 3 D3) Ds agree well with those of recently observed Ds1(2700) ± and DsJ (2860), respectively.

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“…History of exotic hadrons is as old as that of the quark model [1], and the subject has been studied for long time [2]. Yet the recent observation of the evidence of the pentaquark particle Θ + has triggered enormous amount of research activities both in experimental and theoretical hadron physics [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

Structure and reactions of pentaquark baryons

Hosaka

2006

Pramana - J Phys

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We review the current status of the exotic pentaquark baryons. After a brief look at experiments of both positive and negative results, we discuss theoretical methods to study the structure and reactions for the pentaquarks. First we introduce the quark model and the chiral soliton model, where we discuss the relation of mass spectrum and parity with some emphasis on the role of chiral symmetry. It is always useful to picture the structure of the pentaquarks in terms of quarks. As for other methods, we discuss a model independent method, and briefly mention the results from the lattice and QCD sum rule. Decay properties are then studied in some detail, which is one of the important properties of Θ + . We investigate the relation between the decay width and the quark structure having certain spin-parity quantum numbers. Through these analyses, we consider as plausible quantum numbers of Θ + , J P = 3/2 − . In the last part of this note, we discuss production reactions of Θ + which provide links between the theoretical models and experimental information. We discuss photoproductions and hadron-induced reactions which are useful to explore the nature of Θ + .

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A schematic model of baryons and mesons

Cited by 2,542 publications

References 10 publications

The hidden-charm pentaquark and tetraquark states

The hidden-charm pentaquark and tetraquark states

D and D _s in mass loaded flux tube

Structure and reactions of pentaquark baryons

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A schematic model of baryons and mesons

Cited by 2,542 publications

References 10 publications

The hidden-charm pentaquark and tetraquark states

The hidden-charm pentaquark and tetraquark states

D and D s in mass loaded flux tube

Structure and reactions of pentaquark baryons

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Product

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D and D _s in mass loaded flux tube