Exotic hadrons: review and perspectives

Abstract

The physics of exotic hadrons is revisited and reviewed, with emphasis on flavour configurations which have not yet been investigated. The constituent quark model of multiquark states is discussed in some detail, as it can serve as a guide for more elaborate approaches.

24 pages, review article, last update of references, to be published in Few-Body Systems, special issue for the 30th anniversary of this journal

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• Big-Bang Nucleosynthesis
• Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts
• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Observation of the doubly charmed baryon ${\Xi }_{cc}^{++}$
• Hadro-Charmonium
• Baryons with two heavy quarks: Masses, production, decays, and detection
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• Evidence for a Bound H-dibaryon from Lattice QCD
• Can the X(3872) be a 1^{++} four-quark state?
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• Observation of $J/\psi \varphi$ structures consistent with exotic states from amplitude analysis of $B^{+}\to J/\psi \varphi K^{+}$ decays
• Hybrid Mesons
• Is X(3872) a molecule?
• Search for new charmonium states in the processes e+ e- --> J/psi D(*) D(*) at sqrt{s} ~ 10.6 GeV
• Model-independent evidence for $J/\psi p$ contributions to ${\Lambda }_b^0\to J/\psi p{K}^{-}$ decays
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• Evidence for exotic hadron contributions to ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ decays
• Stability of multiquarks in a simple string model
• Observation of the doubly strange b baryon Omega_b-
• Employing spin symmetry to disentangle different models for the XYZ states
• Studying the P_c(4450) resonance in J/psi photoproduction off protons
• Exotic nuclei with open heavy flavor mesons
• Are there compact heavy four-quark bound states?
• Neutron-Proton Scattering in the Context of the $d^{\ast }$(2380) Resonance
• The Y(2175) State in the QCD Sum Rule
• Observation of two new ${\Xi }_b^{-}$ baryon resonances
• Hadronic Molecular States Composed of Heavy Flavor Baryons
• Chromomagnetism, flavour symmetry breaking and S-wave tetraquarks
• New Heavy-Light Mesons $Q\bar{q}$
• Production of doubly charmed tetraquarks with exotic color configurations in electron-positron collisions
• Observation of the ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ decay
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• Doubly heavy hadrons and the domain of validity of doubly heavy diquark--anti-quark symmetry
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• Puzzles in Hadronic Physics and Novel Quantum Chromodynamics Phenomenology
• The string-junction picture of multiquark states: an update
• Strong three-body decays of Lambdac(2940)+
• The lightest neutral hypernuclei with strangeness -1 and -2
• Meson/Baryon/Tetraquark Supersymmetry from Superconformal Algebra and Light-Front Holography
• Search for the deeply bound $K^{-}pp$ state from the semi-inclusive forward-neutron spectrum in the in-flight $K^{-}$ reaction on helium-3
• Search for doubly-heavy dibaryons in a quark model
• A Search for the LHCb Charmed 'Pentaquark' using Photo-Production of $J/\psi$ at Threshold in Hall C at Jefferson Lab
• Maximal isospin few-body systems of nucleons and $\Xi$ hyperons
• Stability of asymmetric tetraquarks in the minimal-path linear potential
• Adiabaticity and color mixing in tetraquark spectroscopy
• Level rearrangement in exotic atoms and quantum dots
• Static-light meson-meson potentials
• Low-lying spectrum of the Y-string three-quark potential using hyper-spherical coordinates
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Cited by in corpus (116)

• Hadronic molecules
• Multiquark Resonances
• Pentaquark and Tetraquark states
• An updated review of the new hadron states
• A review of the open charm and open bottom systems
• Observation of an exotic narrow doubly charmed tetraquark
• Study of the doubly charmed tetraquark $T_{cc}^{+}$
• Threshold cusps and triangle singularities in hadronic reactions
• A survey of heavy-heavy hadronic molecules
• Observation of a $J/\psi \Lambda$ resonance consistent with a strange pentaquark candidate in $B^{-}\to J/\psi \Lambda \bar{p}$ decays
• Explaining the Many Threshold Structures in the Heavy-Quark Hadron Spectrum
• Exotic tetraquark states with the $qq\bar{Q}\bar{Q}$ configuration
• Lattice QCD investigation of a doubly-bottom $\bar{b}\bar{b}ud$ tetraquark with quantum numbers $I(J^P)=0(1^{+})$
• Evidence for a new structure in the $J/\psi p$ and $J/\psi \bar{p}$ systems in $B_s^0\to J/\psi p\bar{p}$ decays
• String dynamics and metastability of fully-heavy tetraquarks
• $P_c(4457{)}^{+}$, $P_c(4440{)}^{+}$, and $P_c(4312{)}^{+}$: molecules or compact pentaquarks?
• Masses of doubly heavy tetraquarks $T_{Q{Q}^{\prime }}$ in a relativized quark model
• Few-body quark dynamics for doubly-heavy baryons and tetraquarks
• Selected Science Opportunities for the EicC
• Fully-heavy tetraquarks in strongly interacting medium
• Quark model estimate of hidden-charm pentaquark resonances
• Spectroscopy, lifetime and decay modes of the $T_{bb}^{-}$ tetraquark
• Study of the $DK$ interaction with femtoscopic correlation functions
• A study of the decays of $S-$wave ${\bar{D}}^{\ast }{K}^{\ast }$ hadronic molecules: the scalar $X_0(2900)$ and its spin partners $X_{J(J=1,2)}$
• Systematic studies of charmonium-, bottomonium-, and $B_c$-like tetraquark states
• Spectrum and rearrangement decays of tetraquark states with four different flavors
• Masses of positive- and negative-parity hadron ground-states, including those with heavy quarks
• $X_{0,1}$(2900) and $(D^{-}{K}^{+})$ invariant mass from QCD Laplace sum rules at NLO
• What can we learn from the electromagnetic properties of hidden-charm molecular pentaquarks with single strangeness?
• Z_c -like spectra from QCD Laplace sum rules at NLO
• Emergence of molecular-type characteristic spectrum of hidden-charm pentaquark with strangeness embodied in the $P_{\psi s}^{\Lambda }(4338)$ and $P_{cs}(4459)$
• Surveying exotic pentaquarks with the typical $QQqq\bar{q}$ configuration
• Pentaquarks with hidden charm as hadroquarkonia
• Molecular picture for $X_0(2900)$ and $X_1(2900)$
• Spectroscopy behavior of fully heavy tetraquarks
• Non-linear Regge trajectories with AdS/QCD
• Very heavy flavored dibaryons
• Triply heavy tetraquark states with the $QQ\bar{Q}\bar{q}$ configuration
• Heavy Baryons and their Exotics from Instantons in Holographic QCD
• Production of exotic tetraquarks $QQ\bar{q}\bar{q}$ in heavy-ion collisions at the LHC
• Search for $\bar{b}\bar{b}us$ and $\bar{b}\bar{c}ud$ tetraquark bound states using lattice QCD
• Stable heavy pentaquarks in constituent models
• Doubly heavy tetraquark multiplets as heavy antiquark-diquark symmetry partners of heavy baryons
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Exploring the electromagnetic properties of the ${\Xi }_c^{(\prime ,\ast )}{\bar{D}}_s^{\ast }$ and ${\Omega }_c^{(\ast )}{\bar{D}}_s^{\ast }$ molecular states
• Mass spectra and decays of open-heavy tetraquark states
• Holographic Heavy-Light Chiral Effective Action
• Ground state baryons in the flux-tube three-body confinement model using Diffusion Monte Carlo
• Pentaquark states with the $QQQq\bar{q}$ configuration in a simple model
• New Perspective on Hybrid Mesons
• Surveying the mass spectra and the electromagnetic properties of the ${\Xi }_c^{(\prime ,\ast )}{D}^{(\ast )}$ molecular pentaquarks
• Understanding the $0^{++}$ and $2^{++}$ charmonium(-like) states near 3.9 GeV
• Heavy flavor pentaquarks with four heavy quarks
• $\bar{K}\Lambda$ molecular explanation to the newly observed $\Xi (1620{)}^0$
• Revisiting $X(3872)\to D^0{\bar{D}}^0{\pi }^0$ in XEFT
• Higher molecular $P_{\psi s}^{\Lambda /\Sigma }$ pentaquarks arising from the ${\Xi }_c^{(\prime ,\ast )}{\bar{D}}_1/{\Xi }_c^{(\prime ,\ast )}{\bar{D}}_2^{\ast }$ interactions
• Heavy Holographic Exotics: Tetraquarks as Efimov States
• Radiative decays and magnetic moments of the predicted $B_c$-like molecules
• New type of doubly charmed molecular pentaquarks containing most strange quarks: Mass spectra, radiative decays, and magnetic moments
• Improved XTZ masses and mass ratios from Laplace Sum Rules at NLO
• Manifestly exotic pentaquarks with a single heavy quark
• Pentaquarks with anticharm or beauty revisited
• Study of three-flavored heavy dibaryons using lattice QCD
• Holographic charm and bottom pentaquarks II: Open and hidden decay widths
• Semi-inclusive lepto-production of hidden-charm exotic hadrons
• Exotic pentaquark states with the $qqQQ\bar{Q}$ configuration
• Charmed baryon$-$nucleon interaction
• Mass spectra of $N\Omega$ dibaryons in the ${}^3{S}_1$ and ${}^5{S}_2$ channels
• Exotic $\Omega \Omega$ dibaryon states in a molecular picture
• $T_{bbb}$: a three $B-$meson bound state
• Holographic charm and bottom pentaquarks I: Mass spectra with spin effects
• Colloquium: Hadron Production in Open-charm Meson Pair at $e^{+}{e}^{-}$ Collider
• ${\Xi }_{bb}$ and ${\Omega }_{bbb}$ molecular states
• Width of a two-body coupled-channel resonance
• Hidden-flavor pentaquarks
• $\sigma$ exchange in the one-boson exchange model involving the ground state octet baryons
• Covalent hadronic molecules induced by shared light quarks
• Investigating the M1 radiative decay behaviors and the magnetic moments of the predicted triple-charm molecular-type pentaquarks
• Discovery of $T_{c\bar{s}0}^a(2900{)}^{0,++}$ implies new charmed-strange pentaquark system
• Charmed baryons in nuclear matter
• Spectrum of two-flavored spin-zero heavy dibaryons in lattice QCD
• Triply heavy baryon spectroscopy revisited
• Spectroscopic Properties of Double-Strangeness Molecular Tetraquarks
• Molecular states in $D_s^{(\ast )+}{\Xi }_c^{{(}^{\prime },\ast )}$ systems
• Why static bound-state calculations of tetraquarks should be met with scepticism
• Prediction of five-flavored pentaquarks
• Probing exotic $J^{PC}$ resonances from deeply bound charmoniumlike molecules: Insights for identifying exotic hadrons
• Doubly charmed dibaryon states
• Investigation of ${\Delta }^0{\Delta }^0$ dibaryon in QCD
• Effect of relativistic kinematics on the stability of multiquarks
• Probing the structure of $X(3872)$ in photoproduction
• The MC-QTAIM: A framework for extending the atoms in molecules analysis beyond purely electronic systems
• Possible molecules of triple-heavy pentaquarks within the extended local hidden gauge formalism
• Study of the hidden charm pentaquarks ${\Lambda }_{c\bar{c}}$ above $4$ GeV
• Hidden and open heavy-flavor hadronic states
• Electromagnetic properties of possible triple-charm molecular hexaquarks
• Unveiling the Composition of the Single-Charm Molecular Pentaquarks: Insights from Radiative Decay and Magnetic Moment
• Hadrons and Few-Body Physics
• String breaking in a cold wind as seen by string models
• Electromagnetic characteristics as probes into the inner structures of the predicted ${\Xi }_c^{{(}^{\prime },\ast )}{D}_s^{(\ast )}$ molecular states
• Fully heavy multiquarks
• The possible assignments of the scalar $K_0^{\ast }(1950)$ and $K_0^{\ast }(2130)$ within the ${}^3{P}_0$ model
• About the $J/\psi J/\psi$ peak of LHCb: fully-charmed tetraquark?
• Discovering an Unquenched Dynamics Mechanism for Charmonium Scattering
• Exotic Heavy Hadrons
• Hints of the $J^{PC}=0^{--}$ and $1^{--}$ $K^{\ast }{\bar{K}}_1(1270)$ Molecules in the $J/\psi \to \varphi \eta {\eta }^{\prime }$ Decay
• First observation of the ${\Lambda }_b^0\to {\Lambda }_c^{+}{D}_s^{-}{K}^{+}{K}^{-}$ decay and search for pentaquarks in the ${\Lambda }_c^{+}{D}_s^{-}$ system
• Possible ${\Sigma }_c^{\ast }\bar{\Sigma }$ molecular states
• Dynamically generated states from the $\eta K^{\ast }{\bar{K}}^{\ast }$, $\pi K^{\ast }{\bar{K}}^{\ast }$, and $K{K}^{\ast }{\bar{K}}^{\ast }$ systems within the fixed-center approximation
• Five-flavor molecular pentaquarks in the ${\Xi }_b^{(\prime ,\ast )}{\bar{D}}^{(\ast )}$ and ${\Xi }_c^{(\prime ,\ast )}{B}^{(\ast )}$ systems
• Stability of pentaquarks with a two- plus three-body chromoelectric interaction
• Exotic hadrons associated with $b$-quark
• New Types of Hydrogenlike matter Composed of Electron(s) and Meson(s)
• Wigner rotations for cascade reactions
• The dynamically generated $h_1$ state by the $K^{\ast }{\bar{K}}^{\ast }$ interaction and its $K_1(1270)\bar{K}$ and $b_1(1235)\pi$ decays
• Predicting charmed-strange molecular tetraquarks with $K^{(\ast )}$ and $T$-doublet charmed or anticharmed meson