New Charmonium States in QCD Sum Rules: a Concise Review

Abstract

In the past years there has been a revival of hadron spectroscopy. Many interesting new hadron states were discovered experimentally, some of which do not fit easily into the quark model. This situation motivated a vigorous theoretical activity. This is a rapidly evolving field with enormous amount of new experimental information. In the present report we include and discuss data which were released very recently. The present review is the first one written from the perspective of QCD sum rules (QCDSR), where we present the main steps of concrete calculations and compare the results with other approaches and with experimental data.

sections, tables, details and references added

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• Search for B+ --> X(3872) K+, X(3872) --> J/psi gamma
• Evidence for a new resonance and search for the Y(4140) in $\gamma \gamma \to \varphi J/\psi$
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• The Tcc = DD* molecular state
• X(3872) as a hadronic molecule and its decays to charmonium states and pions
• Study of the $B\to X(3872)(\to D^{\ast 0}{\bar{D}}^0)K$ decay
• Power corrections to alpha_s(M_τ),|V_{us}| and m_s
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• Evidence that the Y(4660) is a f_0(980)psi' bound state
• Measurement of the near-threshold $e^{+}{e}^{-}\to D^{(\ast )\pm }D{}^{\ast \mp }$ cross section using initial-state radiation
• Is X(3872) a possible candidate of hybrid meson
• Direct extraction of the chiral quark condensate and bounds on the light quark masses
• A study of B->X(3872) K, with X(3872)->J/Psi pi+ pi-
• A fresh look into the heavy quark-mass values
• Precision Measurement of the X(3872) Mass in J/psi pi+ pi- Decays
• Stable multiquark states with heavy quarks in a diquark model
• Is Z^+(4430) a loosely bound molecular state?
• Heavy Quarks on Anisotropic Lattices: The Charmonium Spectrum
• X(3915) and X(4350) as new members in P-wave charmonium family
• QCD sum rule approach for the light scalar mesons as four-quark states
• Detailed Analysis of the Tetraquark Potential and Flip-Flop in SU(3) Lattice QCD
• One Explanation for the Exotic State Y(4260)
• Study of the X(3872) and Y(4260) in B0-->J/psi pi+ pi- K0 and B-->J/psi pi+ pi- K- decays
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• A schematic model for pentaquarks based on diquarks
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• Decays of the X(3872) and ${\chi }_{c1}(2P)$ charmonium
• Charmonium's K2 peak
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• Heavy quark spin selection rule and the properties of the X(3872)
• Can Y(4140) be a $c\bar{c}s\bar{s}$ tetraquark ?
• Strange-quark mass from combined e+e- and tau-decay data:test of the isospin symmetry and implications on epsilon'/εand m_{u,d}
• How Resonances can synchronise with Thresholds
• $Z^{+}(4430)$ as a $D_1^{\prime }{D}^{\ast }$ ($D_1{D}^{\ast }$) molecular state
• Exclusive Production of the X(3872) in B Meson Decay
• Effects of S-wave thresholds
• A QCD sum rule calculation for the Y(4140) narrow structure
• Analysis of the Y(4140) with QCD sum rules
• Canonical Charmonium Interpretation for Y(4360) and Y(4660)
• Y(4140): Possible options
• Erratum: QCD sum rules study of the $J^{PC}=1^{--}$ charmonium $Y$ mesons
• The Y(4260) as a $J/\psi K\bar{K}$ system
• Are ${\Theta }^{+}$ and the Roper resonance diquark-diquark-antiquark states?
• QCD sum rules study of the meson Z^+(4430)
• QCD sum rules study of the $J^{PC}=1^{--}$ charmonium $Y$ mesons
• The $J/\psi DD$ Vertex in QCD Sum Rules
• Charmonium Hybrid Production in Exclusive B Meson Decays
• Charmonium spectroscopy above thresholds
• Search for tetraquark candidate Z(4430) in meson photoproduction
• $D_s{D}^{\ast }$ molecule as an axial meson
• $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ and $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}{\pi }^0$ decay widths from QCD sum rules
• Threshold effect and π^\pm ψ(2S) peak
• $\{Q\bar{q}\}\{{\bar{Q}}^{{(}^{\prime })}q\}$ molecular states
• The Y(4260) as an omega chi_{c1} molecular state
• The hidden charm decay of Y(4140) by the rescattering mechanism
• Charmed Exotics in Heavy Ion Collisions
• J/psi D*D* vertex from QCD sum rules
• A Uniform Description of the States Recently Observed at B-factories
• Exotic Tetraquark ud bar[s] bar[s] of J^P=0^+ in the QCD Sum Rule
• $(Q\bar{s}{)}^{(\ast )}(\bar{Q}s{)}^{(\ast )}$ molecular states from QCD sum rules: a view on Y(4140)
• $\{Q\bar{s}\}\{{\bar{Q}}^{{(}^{\prime })}s\}$ molecular states in QCD sum rules
• A Precision Determination of the D^0 Mass
• Penta-quark baryon in anisotropic lattice QCD
• ρD^*D^* vertex from QCD sum rules
• Spectra and decays of hybrid charmonia
• Pentaquarks
• The meson $Z^{+}(4430)$ as a tetraquark state
• Interpretations for the X(4160) observed in the double charm production at B factories
• Theoretical Overview of the Pentaquark Baryons
• An Alternative Interpretation of X(3872)
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• Light Quark Masses 99
• Isospin properties of the X state near the D {\bar D}^{*} threshold
• Low-energy $D^{\ast +}{D}_1^0$ Scattering and the Resonance-like Structure $Z^{+}(4430)$
• Do the QCD sum rules support four-quark states?
• Partners of Z(4430) and Productions in B Decays
• Mixings of 4-quark components in light non-singlet scalar mesons in QCD sum rules
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• Gluonic excitation of non-exotic hybrid charmonium from lattice QCD
• Hadronic Spectrum - Multiquark States
• ${\mathrm{Z}}^{+}(4430)$ and Analogous Heavy Flavor States
• Line Shapes of the Z(4430)
• The line shape of the radiative open-charm decay of Y(4140) and Y(3930)
• Bottomed Analog of Z+(4433)
• Magnetic moments of antidecuplet pentaquarks
• The Charged Z(4433): Towards a New Spectroscopy
• Analysis of the X(4350) as a scalar $\bar{c}c$ and $D_s^{\ast }{\bar{D}}_s^{\ast }$ mixing state with QCD sum rules
• omega-rho^0 mixing as a possible origin of the hypothetical isospin non-conservation in the X(3872) --> pi^+ pi^- J/psi decay
• Hadron Spectroscopy (theory): Diquarks, Tetraquarks, Pentaquarks and no quarks
• Lattice calculations of hadron properties
• Width of the J^P=1/2^+ pentaquark in the quark-diquark model
• Bound States of the Heavy Flavor Vector Mesons and Y(4008) and $Z_1^{+}(4050)$
• The X(3872) Meson and "Exotic" Spectroscopy at CDF II
• Search for X(3872) in gamma gamma Fusion and ISR at CLEO
• Stability of the pentaquark in a naive string model
• Understanding the newly observed Y(4008) by Belle
• Is the Z^+(4430) a radially excited state of D_s?
• Can the X(4350) narrow structure be a $1^{-+}$ exotic state?
• Axial vector tetraquark with S=+2
• Spectroscopy of Mesons with Heavy Quarks
• Tetraquarks with charm in coupled-channel formalism
• $Z^{+}(4430)$ as a resonance in the $D_1(D_1^{\prime })D^{\ast }$ channel
• Topics in Hadron Spectroscopy in 2009
• The signal of $Z^{\pm }(4430)$ in nucleon-antinucleon scattering
• The Y(4140), X(4260), psi(2D), psi(4S) and tentative psi(3D)
• Role of Large Gluonic Excitation Energy for Narrow Width of Penta-Quark Baryons in QCD String Theory
• Anti-charmed pentaquark from B decays
• The charge conjugation quantum number in multiquark systems
• Microscopic calculation of the decay of Jaffe-Wilczek tetraquarks, and the Z(4433)
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• Pentaquarks in the Chiral Symmetry Limit
• No Radial Excitations in Low Energy QCD. I. Diquarks and Classification of Mesons
• Search for Prompt Production of ${\chi }_c$ and X(3872) in e^+e^- Annihilations
• Possible nature of $Z^{+}(4430)$
• Hadron Spectroscopy Results from Belle
• The spectrum of charmonium in the Resonance-Spectrum Expansion
• Radially Excited States of 1P Charmonia and X(3872)
• Exotic c c-bar Mesons
• Steiner-tree confinement and tetraquarks
• Challenges in Hadron Physics
• The double life of the X meson
• Properties of Exotic Charmonium-like States at CDF

Cited by in corpus (228)

• Heavy quarkonium: progress, puzzles, and opportunities
• The hidden-charm pentaquark and tetraquark states
• Multiquark Resonances
• Pentaquark and Tetraquark states
• Heavy-Quark QCD Exotica
• An updated review of the new hadron states
• Exotics: Heavy Pentaquarks and Tetraquarks
• A review of the open charm and open bottom systems
• The nature of the Lambda(1405) resonance in chiral dynamics
• Exotic Hadrons with Heavy Flavors -X, Y, Z and Related States-
• Implications of LHCb measurements and future prospects
• Towards exotic hidden-charm pentaquarks in QCD
• Four-Quark Hadrons: an Updated Review
• Analysis of the $P_c(4380)$ and $P_c(4450)$ as pentaquark states in the diquark model with QCD sum rules
• Exotic hadrons: review and perspectives
• Exotic Hadrons from Heavy Ion Collisions
• A non-relativistic model for the $[cc][\bar{c}\bar{c}]$ tetraquark
• The Vector and Axial-Vector Charmonium-like States
• Weak decays of heavy hadrons into dynamically generated resonances
• Studying Exotic Hadrons in Heavy Ion Collisions
• QCD Sum Rules Approach to the $X,Y$ and $Z$ States
• Gluon Condensates and m_b(m_b) from QCD-Exponential Moments at Higher Orders
• $Z_c^{+}(3900)$ decay width in QCD sum rules
• Recent Progress in QCD Condensate Evaluations and Sum Rules
• Exotic mesons with double charm and bottom flavor
• Could $Z_b(10610)$ be a $B^{\ast }\bar{B}$ molecular state?
• Heavy-light diquark masses from QCD sum rules and constituent diquark models of tetraquarks
• Charm couplings and form factors in QCD sum rules
• Improved QCD sum rule study of $Z_c(3900)$ as a $\bar{D}{D}^{\ast }$ molecular state
• Charged Exotic Charmonium States
• Baryon states with open beauty in the extended local hidden gauge approach
• Strong $Z_c^{+}(3900)\to J/\psi {\pi }^{+};{\eta }_c{\rho }^{+}$ decays in QCD
• Predicted charged charmonium-like structures in the hidden-charm dipion decay of higher charmonia
• Interpreting $Z_c(3900)$ and $Z_c(4025)/Z_c(4020)$ as charged tetraquark states
• Exotic mesons with hidden bottom near thresholds
• Mass and decay constant of the newly observed exotic $X(5568)$ state
• A fresh look into m_{c,b} and precise f_{D_(s),B_(s)} from heavy-light QCD spectral sum rules
• QCD sum rule study of hidden-charm pentaquarks
• $0^{+}$ fully-charmed tetraquark states
• Three Lectures on Hadron Physics
• Heavy quark dynamics for charm and bottom flavor on Fermi surface at zero temperature
• On $X(3872)$ production in high energy heavy ion collisions
• Study of $B{\bar{B}}^{\ast }$ and $B^{\ast }{\bar{B}}^{\ast }$ interactions in $I=1$ and relationship to the $Z_b(10610)$, $Z_b(10650)$ states
• Modification of the B Meson Mass in a Magnetic Field from QCD Sum Rules
• Hadronic effects on the X(3872) meson abundance in heavy ion collisions
• Decoding the $X(5568)$ as a fully open-flavor $su\bar{b}\bar{d}$ tetraquark state
• Understanding the internal structures of the $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$
• Production of doubly charmed tetraquarks with exotic color configurations in electron-positron collisions
• Magnetic dipole moments of the hidden-charm pentaquark states: $P_c(4440)$, $P_c(4457)$ and $P_{cs}(4459)$
• Magnetic dipole moments of the $T_{cc}^{+}$ and $Z_V^{++}$ tetraquark states
• Zc(4200)+ decay width as a charmonium-like tetraquark state
• $\bar{\mathrm{D}}$ and $\mathrm{B}$ mesons in nuclear medium
• XYZ-like Spectra from Laplace Sum Rule at N2LO in the Chiral Limit
• $\{Q\bar{s}\}\{{\bar{Q}}^{{(}^{\prime })}s\}$ molecular states in QCD sum rules
• $X(3872)$ production and absorption in a hot hadron gas
• Relation between $T_{cc,bb}$ and $X_{c,b}$ from QCD
• Establishing low-lying doubly charmed baryons
• Four-quark structure of Zc(3900), Z(4430) and Xb(5568) states
• The Doubly-heavy Tetraquarks ($q{q}^{\prime }\bar{Q}\overline{Q^{\prime }}$) in a Constituent Quark Model with a Complete Set of Harmonic Oscillator Bases
• Heavy-Light Mesons on the Light Front
• Investigating different structures of the Z_{b}(10610) and Z_{b}(10650)
• $S$-wave $D^{(\ast )}N$ molecular states: ${\Sigma }_c(2800)$ and ${\Lambda }_c(2940{)}^{+}$?
• Width of the exotic $X_b(5568)$ state through its strong decay to $B_s^0{\pi }^{+}$
• Investigation of magnetic moment of $P_{cs}(4338)$ and $P_{cs}(4459)$ pentaquark states
• An open charm tetraquark candidate: note on $X_0(2900)$
• Could $Z_c(3900)$ be a $I^G{J}^P=1^{+}{1}^{+}$ $D^{\ast }\bar{D}$ molecular state?
• On the nature of the X(3872) from QCD
• Testing the molecular nature of ${\mathbf{D}}_{\mathbf{s}0}^{\ast }(2317)$ and ${\mathbf{D}}_0^{\ast }(2400)$ in semileptonic ${\mathbf{B}}_{\mathbf{s}}$ and $\mathbf{B}$ decays
• Heavy quark symmetry and weak decays of the $b$-baryons in pentaquarks with a $c\bar{c}$ component
• Exploring a ${\Sigma }_c\bar{D}$ state: with focus on $P_c(4312{)}^{+}$
• QCD sum rule calculation for the charmonium-like structures in the J/psi phi and J/psi omega invariant mass spectra
• Tetraquark Production in Double Parton Scattering
• $D^{\ast }D\rho$ vertex from QCD sum rules
• Hadronic molecules with both open charm and bottom
• Charmed partner of the exotic $X(5568)$ state and its properties
• A QCD sum rule study for a charged bottom-strange scalar meson
• A QCD sum rule calculation of the $X^{\pm }(5568)\to B_s^0{\pi }^{\pm }$ decay width
• Mass Spectrum of Heavy Quarkonium Hybrids
• Predicition for the decay width of a charged state near the $D_s{\bar{D}}^{\ast }/D_s^{\ast }\bar{D}$ threshold
• Color spin wave functions of heavy tetraquark states
• The $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state: Y(4260) or Y(4660)?
• Exotic ${\bar{D}}_s^{(\ast )}{D}^{(\ast )}$ molecular states and $sc\bar{q}\bar{c}$ tetraquark states with $J^P=0^{+},1^{+},2^{+}$
• Heavy Baryons and their Exotics from Instantons in Holographic QCD
• Theoretical description of the decays ${\Lambda }_b\to {\Lambda }^{(\ast )}({\frac{1}{2}}^{\pm },{\frac{3}{2}}^{\pm })+J/\psi$
• Exotic $1^{--}$ States in QCD Sum Rules
• Magnetic and quadrupole moments of the $Z_c(3900)$
• Gluon condensates in a cold quark gluon plasma
• Electromagnetic multipole moments of the $P_c^{+}(4380)$ pentaquark in light-cone QCD
• Tetraquark-adequate formulation of QCD sum rules
• Magnetic dipole moment of the $Z_{cs}(3985)$ state: diquark-antidiquark and molecular pictures
• Aspects of open-flavour mesons in a comprehensive DSBSE study
• Bottomonium states in hot asymmetric strange hadronic matter
• Application of the QCD light cone sum rule to tetraquarks: the strong vertices $X_b{X}_b\rho$ and $X_c{X}_c\rho$
• Hadronic effects on the $cc\bar{q}\bar{q}$ tetraquark state in relativistic heavy ion collisions
• Relating $D^{\ast }{\bar{D}}^{\ast }$ currents with $J^{\pi }=0^{+},1^{+}$ and $2^{+}$ to $Z_c$ states
• QCD Sum Rules for the production of the X(3872) as a mixed molecule-charmonium state in B meson decay
• Search for doubly-heavy dibaryons in a quark model
• Mass Spectra and Decay Constants of Heavy-Light Mesons: A Case Study of QCD Sum Rules and Quark Model
• Holographic Heavy-Light Chiral Effective Action
• Tetraquark and two-meson states at large $N_{\mathrm{c}}$
• Electromagnetic properties of doubly heavy pentaquark states
• Mixing Angle of Hadrons in QCD: A New View
• Fully-heavy pentaquark states
• Could $Z_c(4025)$ be a $J^P=1^{+}$ $D^{\ast }\overline{D^{\ast }}$ molecular state?
• Open charm-bottom scalar tetraquarks and their strong decays
• Exotic fully-heavy $Q\bar{Q}Q\bar{Q}$ tetraquark states in $8_{[Q\bar{Q}]}\otimes 8_{[Q\bar{Q}]}$ color configuration
• Photoproduction of the charged charmoniumlike $Z_c^{+}(4200)$
• Exotic B_c-like molecules in QCD Sum Rules
• QCD sum rule studies on the $ss\bar{s}\bar{s}$ tetraquark states with $J^{PC}=1^{+-}$
• Monte-Carlo Based QCD Sum Rules Analysis of $X_0(2900)$ and $X_1(2900)$
• Revisiting $D_{s0}^{\ast }(2317)$ as a $0^{+}$ tetraquark state from QCD sum rules
• XYZ-SU3 Breakings from Laplace Sum Rules at Higher Orders
• Y(4260) as a mixed charmonium-tetraquark state
• Magnetic dipole moments of the $Z_c(4020{)}^{+}$, $Z_c(4200{)}^{+}$, $Z_{cs}(4000{)}^{+}$ and $Z_{cs}(4220{)}^{+}$ states in light-cone QCD
• Meson production in two-photon interactions at energies available at CERN Large Hadron Collider
• Production of exotic charmonium in $\gamma \gamma$ interactions at hadronic colliders
• Heavy Exotic Molecules with Charm and Bottom
• Heavy-Light Mesons in Chiral AdS/QCD
• 1-- and 0++ heavy four-quark and molecule states in QCD
• Magnetic moments of the doubly charged axial-vector $T_{cc}^{++}$ states
• X(3872): propagating in a dense medium
• Heavy and Strange Holographic Baryons
• Heavy Holographic Exotics: Tetraquarks as Efimov States
• Investigation of the stability for fully-heavy $bc\bar{b}\bar{c}$ tetraquark states
• Electromagnetic form factors of the $B_c$-like tetraquarks: molecular and diquark-antidiquark pictures
• Test of the multiquark structure of $a_1(1420)$ in strong two-body decays
• Tetraquarks in holographic QCD
• Magnetic dipole moment of $Z_b(10610)$ in light-cone QCD
• Exploring the magnetic dipole moments of $T_{QQ\bar{q}\bar{s}}$ and $T_{QQ\bar{s}\bar{s}}$ states in the framework of QCD light-cone sum rules
• Adiabaticity and color mixing in tetraquark spectroscopy
• Vacuum polarization corrections to low energy quark effective couplings
• TRK Sum Rule for Interacting Photons
• Fully open-flavor tetraquark states $bc\bar{q}\bar{s}$ and $sc\bar{q}\bar{b}$ with $J^P=0^{+},1^{+}$
• Tetraquark-adequate QCD sum rules for quark-exchange processes
• Pair structure of heavy tetraquark systems
• $X(3872)$ as virtual companion pole of the charm-anticharm state ${\chi }_{c1}(2P)$
• Production of multi-charmed hadrons by recombination in heavy ion collisions
• Meson-Hybrid Mixing in $J^{PC}=1^{++}$ Heavy Quarkonium from QCD Sum-Rules
• Study of $X_c(3250)$ as a $D_0^{\ast }(2400)N$ molecular state
• Three-body model for $K(1460)$ resonance
• The Polyakov loop in various representations in the confined phase of QCD
• Revisiting hidden-charm pentaquarks from QCD sum rules
• Probing the $X(4350)$ in $\gamma \gamma$ interactions at the LHC
• X(3872) and Its Heavy Quark Spin Symmetry Partners in QCD Sum Rules
• Exotic Charmonium and Bottomonium-like Resonances
• Searching for hidden-charm baryonium signals in QCD sum rules
• Predicting the existence of a 2.9 GeV $D{f}_0(980)$ molecular state
• The electromagnetic multipole moments of the charged open-flavor $Z_{\bar{c}q}$ states
• Doubly-Charged $T_{cc}^{++}$ States in the Dynamical Diquark Model
• Weak Decays of Doubly-Heavy Tetraquarks $b\bar{c}q\bar{q}$
• Charmonium production in ultra-peripheral heavy ion collisions with two-photon processes
• SU(2) higher-order effective quark interactions from polarization
• New molecular candidates: X(1910), X(2200), and X(2350)
• Mass spectra for the $cc\bar{b}\bar{b}$/$bb\bar{c}\bar{c}$ tetraquark states
• Molecular states with hidden charm and strange in QCD Sum Rules
• Exploring the $D^{\ast }\rho$ system within QCD sum rules
• Resonance $X(5568)$ as an exotic axial-vector state
• Understanding close-lying exotic charmonia states within QCD sum rules
• Highly excited and exotic fully-strange tetraquark states
• Analysis of the hidden-charm-hidden-strange tetraquark mass spectrum via the QCD sum rules
• Search for $Z_{s1}^{+}$ and $Z_{s2}^{+}$ strangeonium-like structures
• Magnetic moments of the vector hidden-charmed tetraquark states
• Masses of doubly heavy tetraquarks $QQ\bar{n}\bar{q}$ with $J^P=1^{+}$
• Heavy vector and axial-vector $D$ mesons in hot magnetized asymmetric nuclear matter
• Isospin-violating strong decays of scalar single-heavy tetraquarks
• Strong decay constants of heavy tensor mesons in light cone QCD sum rules
• QCD Sum Rule Study for a Possible Charmed Pentaquark Θc(3250)
• Can the $\psi (4040)$ explain the peak associated with $Y(4008)$?
• Production and absorption of exotic bottomonium-like states in high energy heavy ion collisions
• Deciphering charmoniumlike exotic states in photon - hadron interactions at RHIC and LHC energies
• The discrete contribution to ${\psi }^{\prime }\to J/\psi +\gamma \gamma$
• Fully-strange tetraquark states with the exotic quantum numbers $J^{PC}=0^{+-}$ and $2^{+-}$
• Photoproduction of $a_2(1320)$ in a Regge model
• Magnetic moment of the ${\Xi }_b(6227)$ as a molecular pentaquark state
• Magnetic moment of $X_Q$ state with $J^{PC}=1^{+\pm }$ in light cone QCD sum rules
• Magnetic and quadrupole moments of the $Z_c(4020{)}^{+}$, $Z_c(4050{)}^{+}$, and $Z_c(4600{)}^{+}$ states in the diquark-antidiquark picture
• The electromagnetic multipole moments of the possible charm-strange pentaquarks in light-cone QCD
• Predictions of the hybrid mesons with exotic quantum numbers $J^{PC}=2^{+-}$
• Searching for fully-heavy tetraquark states in QCD moment sum rules
• Factorization breaking of four-quark condensates in the Nambu Jona Lasinio model
• Why X(3915) is so narrow as a ${\chi }_{c0}(2P)$ state
• Heavy Exotic Molecules
• Masses of tetraquark states in the hidden charm sector above $D-D^{\ast }$ threshold
• Vertices of the heavy spin-3/2 sextet baryons with light vector mesons in QCD
• QCD sum rules study of X(4350)
• Analytic structure of ${\varphi }^4$ theory using light-by-light sum rules
• Exploratory study of X(4140) in QCD sum rules
• No Radial Excitations in Low Energy QCD. I. Diquarks and Classification of Mesons
• $Y(4626)$ as a $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state
• Analytic calculation of doubly heavy hadron spectral density in coordinate space
• Mass Spectrum of Exotic X(5568) State via Artificial Neural Network
• An introduction to the quark model
• Radiative decays of the p-wave charmed heavy baryons
• Nonlocal gluon condensates in QCD sum rules
• Revisiting light-flavor diquarks in the inverse matrix method of QCD sum rules
• Dynamical picture for the exotic XYZ states
• Current Topics in Heavy Quarkonium Physics
• Radiative decays of the heavy tensor mesons in light cone QCD sum rules
• 1-- and 0++ Four-Quarks and Molecules from QCD Spectral Sum Rules
• Searching for a hidden charm $h_1$ state in the $X(4660)\to \eta h_1$ and $X(4660)\to \eta D^{\ast }{\bar{D}}^{\ast }$ decays
• $Z_c(3900)$ as a Four-Quark State
• Double-gluon charmonium hybrid states with various (exotic) quantum numbers
• Mixing of X and Y states from QCD Sum Rules analysis
• Decay widthes of ${}^3{P}_J$ charmonium to $DD,D{D}^{\ast },D^{\ast }{D}^{\ast }$ and corresponding mass shifts of ${}^3{P}_J$ charmonium
• Possibility of ${\Sigma }_c(2800)$ and ${\Lambda }_c(2940{)}^{+}$ as $S$-wave $D^{(\ast )}N$ molecular states
• Reanalysis of lattice QCD spectra leading to the $D_{s0}^{\ast }(2317)$ and $D_{s1}^{\ast }(2460)$
• Electromagnetic properties of the $D{\bar{D}}^{\ast }K$ molecular hexaquark state
• Unraveling $K(1690)$ as a pseudoscalar $ud\bar{d}\bar{s}$ tetraquark state
• Looking for meson molecules in B decays
• Correction to the energy spectrum of ${}^1{S}_0$ heavy quarkonia due to two-gluon annihilation effect
• Two-body strong decays of the hidden-charm tetraquark molecular states via the QCD sum rules
• Mass shifts of ${}^3{P}_J$ heavy quarkonia due to the effect of two-gluon annihilation
• Baryons and baryoniums in the perspective of QCD sum rules
• Looking for a vector charmonium-like state $Y$ in $e^{+}{e}^{-}\to \bar{D}{D}_1(2420)+c.c.$
• Advances in QCD sum rule calculations
• Study of conventional and non-conventional scalar and vector mesons
• Systematic study of fully heavy-flavored tetraquarks $Q_1{Q}_2{\bar{Q}}_1{\bar{Q}}_2(Q_{1;2}\in \left\{b;c\right\})$: Mass spectra, threshold analysis, and confrontation with LHC data
• Charting doubly strange hidden-charm pentaquarks: An electromagnetic mapping of spin-$\frac{1}{2}$ and $\frac{3}{2}$ states
• Meson scattering and tetraquarks in two-dimensional QCD
• X, Y and Z States
• On the description of exotic hadron states within QCD sum rules
• The Role of Flavor in Multiquark Spectroscopy
• Motivations for AdS/QCD from 10D supergravity solutions
• On properties of the exotic hadrons from QCD sum rules
• Strange pentaquark molecules in QCD sum rules
• Exotic charmonium spectroscopy with CMS
• Structural dissection of hadronic molecules: The $D^{(\ast )}{\bar{K}}^{(\ast )}$ family under QCD light-cone sum rules
• Analytic electromagnetic signatures of compact pentaquark structure: A multi-current QCD light-cone sum rules analysis of the $P_{\psi s}^{\Lambda }$ states