Non-Standard Heavy Mesons and Baryons, an Experimental Review

Abstract

Quantum Chromodynamics (QCD), the generally accepted theory for the strong interactions, describes the interactions between quarks and gluons. The strongly interacting particles that are seen in nature are hadrons, which are composites of quarks and gluons. Since QCD is a strongly coupled theory at distance scales that are characteristic of observable hadrons, there are no rigorous, first-principle methods to derive the spectrum and properties of the hadrons from the QCD Lagrangian, except for Lattice QCD simulations that are not yet able to cope with all aspects of complex and short-lived states. Instead, a variety of "QCD inspired" phenomenological models have been proposed. Common features of these models are predictions for the existence of hadrons with substructures that are more complex than the standard quark-antiquark mesons and the three quark baryons of the original quark model that provides a concise description of most of the low-mass hadrons. Recently, an assortment of candidates for non-standard multi-quark mesons, meson-gluon hybrids and pentaquark baryons that contain heavy (charm or bottom) quarks have been discovered. Here we review the experimental evidence for these states and make some general comparisons of their measured properties with standard quark-model expectations and predictions of various models for non-standard hadrons. We conclude that the spectroscopy of all but simplest hadrons is not yet understood.

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• Search for new charmonium states in the processes e+ e- --> J/psi D(*) D(*) at sqrt{s} ~ 10.6 GeV
• Observation of anomalous Upsilon(1S)pi+pi- and Upsilon(2S)pi+pi- production near the Upsilon(5S) resonance
• Isoscalar meson spectroscopy from lattice QCD
• Observation of X(3872) production in pp collisions at sqrt(s)= 7 TeV
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• Properties of Excited Charm and Charm-Strange Mesons
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• Observation of a peaking structure in the J/psi phi mass spectrum from B(+/-) to J/psi phi K(+/-) decays
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• Dalitz analysis of B --> K pi psi' decays and the Z(4430)+
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• Line Shapes of the X(3872)
• Comment on the new $D_s^{(\ast )+}{\pi }^0$ resonances
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• $Z_b$ and $Z_c$ Exotic States as Coupled Channel Cusps
• Y(4143) is probably a molecular partner of Y(3930)
• Study of $e^{+}{e}^{-}\to \omega {\chi }_{cJ}$ at center-of-mass energies from 4.21 to 4.42 GeV
• Measurement of the Dipion Mass Spectrum in X(3872) -> J/Psi Pi+ Pi- Decays
• Photoproduction of hidden charm pentaquark states $P_c^{+}(4380)$ and $P_c^{+}(4450)$
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• Fate of the Tetraquark Candidate Zc(3900) from Lattice QCD
• Searching for observable effects induced by anomalous triangle singularities
• Could the near-threshold $XYZ$ states be simply kinematic effects?
• BB interactions with static bottom quarks from Lattice QCD
• Observation of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0{h}_c$ and a neutral charmoniumlike structure $Z_c(4020{)}^0$
• Coupled-Channel and Screening Effects in Charmonium Spectrum
• Study of the $B\to X(3872)(\to D^{\ast 0}{\bar{D}}^0)K$ decay
• Very narrow excited ${\Omega }_c$ baryons
• How the Z_c(3900) Reveals the Spectra of Quarkonium Hybrid and Tetraquark Mesons
• Determination of the $\psi (3770)$, $\psi (4040)$, $\psi (4160)$ and $\psi (4415)$ resonance parameters
• P-Wave Charmonium Production in B-Meson Decays
• Quantum numbers of the $X(3872)$ state and orbital angular momentum in its ${\rho }^{0}J\psi$ decay
• A study of B->X(3872) K, with X(3872)->J/Psi pi+ pi-
• Reproducing the $Z_c(3900)$ structure through the initial-single-pion-emission mechanism
• Search for the X(4140) state in B+->J/psi phi K+ decays with the D0 detector
• Precision Measurement of the X(3872) Mass in J/psi pi+ pi- Decays
• Photoproduction of Exotic Baryon Resonances
• X(3872) and Y(4140) using diquark-antidiquark operators with lattice QCD
• Measurement of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\psi (3686)$ from 4.008 to 4.600$\sim$GeV and observation of a charged structure in the ${\pi }^{\pm }\psi (3686)$ mass spectrum
• Observation of h_c(^1P_1) State of Charmonium
• Study of the reaction e^{+}e^{-} -->J/psiπ^{+}π^{-} via initial-state radiation at BaBar
• Observation of the chi_c2(2P) meson in the reaction gamma gamma -> D Dbar at BABAR
• Search for a Charged Partner of the X(3872) in the B Meson Decay B --> X- K, X- --> J/psi pi- pi0
• J/psi gamma and psi(2S) gamma decay modes of the X(3872)
• $Z_c(3900)$: what has been really seen?
• Measurement of the $b$-quark production cross-section in 7 and 13 TeV $pp$ collisions
• Where is the χ_{c0}(2P)?
• Study of $D_J$ meson decays to $D^{+}{\pi }^{-}$, $D^0{\pi }^{+}$ and $D^{\ast +}{\pi }^{-}$ final states in pp collision
• Study of the $Z_c^{+}$ channel using lattice QCD
• Study of X(3915) --> J/ψω in two-photon collisions
• Confirmation of a charged charmoniumlike state $Z_c(3885{)}^{\mp }$ in $e^{+}{e}^{-}\to {\pi }^{\pm }(D{\bar{D}}^{\ast }{)}^{\mp }$ with double $D$ tag
• A case for hidden $b\bar{b}$ tetraquarks based on $e^{+}{e}^{-}\to b\bar{b}$ cross section between $\sqrt{s}=10.54$ and 11.20 GeV
• Strange and nonstrange baryon spectra in the relativistic interacting quark-diquark model with a Gürsey and Radicati-inspired exchange interaction
• The $\eta$ and ${\eta }^{\prime }$ mesons from Lattice QCD
• On the hidden charm state at 3872 MeV
• Observation of the $Y(4140)$ structure in the $J/\psi \varphi$ Mass Spectrum in $B^{\pm }\to J/\psi \varphi K$ cays
• Search for structure in the $B_s^0{\pi }^{\pm }$ invariant mass spectrum
• Twenty-first Century Lattice Gauge Theory: Results from the QCD Lagrangian
• Exotic Hadrons with Hidden Charm and Strangeness
• Can Y(4140) be a $c\bar{c}s\bar{s}$ tetraquark ?
• Search for the doubly charmed baryon Xi_cc^+
• Study of e+e- => B(*) B(*)-bar pi+- at sqrt(s)=10.866 GeV
• ${\chi }_{c0}^{}(3915)$ As the Lightest $c\bar{c}s\bar{s}$ State
• Y(4260) and Y(4360) as mixed hadrocharmonium
• Disentangling two- and four-quark state pictures of the charmed scalar mesons
• Observation of a neutral charmoniumlike state $Z_c(4025{)}^0$ in $e^{+}{e}^{-}\to (D^{\ast }{\bar{D}}^{\ast }{)}^0{\pi }^0$
• Search for the X(4140) state in B+ to J/psi phi K+ decays
• Studying the P_c(4450) resonance in J/psi photoproduction off protons
• Amplitude analysis and the nature of the Zc(3900)
• Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV
• Precise B, B_s and B_c meson spectroscopy from full lattice QCD
• Observation of a Neutral Structure near the $D{\bar{D}}^{\ast }$ Mass Threshold in $e^{+}{e}^{-}\to (D{\bar{D}}^{\ast }{)}^0{\pi }^0$ at $\sqrt{s}$ = 4.226 and 4.257 GeV
• D and D_s meson spectroscopy
• Analysis of the Y(4140) with QCD sum rules
• A QCD sum rule calculation for the Y(4140) narrow structure
• e^+ e^- Annihilation into J/psi + J/psi
• Y(4140): Possible options
• Strange baryon spectroscopy in the relativistic quark model
• Measurements of $\psi (2S)$ and $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ production in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Hybridized Tetraquarks
• Interpreting the $X(5568)$
• Radiative Decays, Nonet Symmetry and SU(3) Breaking
• The observation of light nuclei at ALICE and the X(3872) conundrum
• The Status of Exotic-quantum-number Mesons
• Quark-Model Identification of Baryon Ground and Resonant States
• Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrisation for line shapes
• Ambiversion of X(3872)
• A Study of the DsJ(2317) and DsJ(2460) Mesons in Inclusive ccbar Production Near sqrt(s) = 10.6 GeV
• Observation of an alternative ${\chi }_{c0}(2P)$ candidate in $e^{+}{e}^{-}\to J/\psi D\bar{D}$
• Observation of an enhancement in e+e- to Upsilon(1S)pi+pi-, Upsilon(2S)pi+pi-, and Upsilon(3S)pi+pi- production near sqrt{s}=10.89 GeV at Belle
• Observation of an enhancement in $e^{+}{e}^{-}\to {\rm Y}(1S){\pi }^{+}{\pi }^{-}$, ${\rm Y}(2S){\pi }^{+}{\pi }^{-}$, and ${\rm Y}(3S){\pi }^{+}{\pi }^{-}$ production around $\sqrt{s}=10.89$ GeV at Belle
• First Observation of the Zb0(10610) in a Dalitz Analysis of Y(5S) -> Y(nS) pi0 pi0
• Search for Z_c^+(3900) in the 1^+- channel on the lattice
• Measurement of the e+e- -> J/psi ccbar cross section at \sqrt{s} ~10.6 GeV
• Dalitz Plot Analysis of B- -> D+ pi- pi-
• The $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$ in the relativized quark model
• Hidden-Beauty Charged Tetraquarks and Heavy Quark Spin Conservation
• Possible Molecular States of $D_s^{\ast }{\bar{D}}_s^{\ast }$ System and Y(4140)
• X(3872) is not a true molecule
• How the X(5568) challenges our understanding of QCD
• Could the $X(3915)$ and the $X(3930)$ Be the Same Tensor State?
• Is the X(3915) the chi_{c0}(2P)?
• The hidden charm decay of Y(4140) by the rescattering mechanism
• Interpretation of Axial Resonances in J/psi-phi at LHCb
• Understanding the internal structures of the $X(4140)$, $X(4274)$, $X(4500)$ and $X(4700)$
• Canonical description of the new LHCb resonances
• $(Q\bar{s}{)}^{(\ast )}(\bar{Q}s{)}^{(\ast )}$ molecular states from QCD sum rules: a view on Y(4140)
• Search for the $Z_1(4050{)}^{+}$ and $Z_2(4250{)}^{+}$ states in ${\bar{B}}^0\to {\chi }_{c1}{K}^{-}{\pi }^{+}$ and $B^{+}\to {\chi }_{c1}{K}_S^0{\pi }^{+}$
• Study of B{+-,0} --> J/ψ K+ K- K{+-,0} and search for B0 --> J/ψ ϕ at BABAR
• Coupled-Channel Model for $\bar{K}N$ Scattering in the Resonant Region
• Analysis of the Y(4140) and related molecular states with QCD sum rules
• Tuning Fermilab Heavy Quarks in 2+1 Flavor Lattice QCD with Application to Hyperfine Splittings
• Searching for the Bottom Counterparts of X(3872) and Y(4260) via ${\pi }^{+}{\pi }^{-}{\rm Y}$
• Cusps and Exotic Charmonia
• Dalitz plot distributions in presence of triangle singularities
• Charged charmonium-like Z+(4430) from rescattering in conventional B decays
• Search for a new bottomonium state decaying to Upsilon(1S) pi+ pi- in pp collisions at sqrt(s) = 8 TeV
• First Results from The GlueX Experiment
• Tetraquark state candidates: $Y(4140)$, $Y(4274)$ and $X(4350)$
• A study of the eta and eta' mesons with improved staggered fermions
• A model-independent confirmation of the $Z(4430{)}^{-}$ state
• Interpretations for the X(4160) observed in the double charm production at B factories
• Measurement of the $e^{+}{e}^{-}\to \eta J/\psi$ cross section and search for $e^{+}{e}^{-}\to {\pi }^{0}J/\psi$ at center-of-mass energies between 3.810 and 4.600~GeV
• Probing the nature of Z_c states via the eta_c rho decay
• Evidence for the decay $B^0\to J/\psi \omega$ and measurement of the relative branching fractions of $B_s^0$ meson decays to $J/\psi \eta$ and $J/\psi {\eta }^{{}^{\prime }}$
• Observation of $e^{+}{e}^{-}\to \eta J/\psi$ at center-of-mass energy $sqrts=4.009$ GeV
• Production of the X(3870) at the Upsilon(4S) by the Coalescence of Charm Mesons
• Hadronic molecules with both open charm and bottom
• QCD sum rule calculation for the charmonium-like structures in the J/psi phi and J/psi omega invariant mass spectra
• Exotic resonances due to $\eta$ exchange
• Possibility of Exotic States in the Upsilon system
• The X(3872) at CDF II
• Measurements of the ${\rm Y}(10860)$ and ${\rm Y}(11020)$ resonances via $\sigma (e^{+}{e}^{-}\to {\rm Y}(n\mathrm{S}){\pi }^{+}{\pi }^{-})$
• $B_s{\pi }^{+}$ scattering and search for X(5568) with lattice QCD
• Bottomonium-like states: physics case for energy scan above the $B\bar{B}$ threshold at Belle-II
• $X(3915)$ as a $D_s{\bar{D}}_s$ bound state
• Continuum limit of the $D$ meson, $D_s$ meson and charmonium spectrum from $N_f=2+1+1$ twisted mass lattice QCD
• Charmonium meson and hybrid radiative transitions
• Search for the $X_b$ and other hidden-beauty states in the ${\pi }^{+}{\pi }^{-}{\rm Y}(1\mathrm{S})$ channel at ATLAS
• The line shape of the radiative open-charm decay of Y(4140) and Y(3930)
• Tetraquark Cusp Effects from Diquark Pair Production
• A Search for the LHCb Charmed 'Pentaquark' using Photo-Production of $J/\psi$ at Threshold in Hall C at Jefferson Lab
• Reviewing the Evidence for Pentaquarks
• Where does the X(5568) structure come from?
• Search for the $Y(4140)$ via $e^{+}{e}^{-}\to \gamma \varphi J/\psi$ at $\sqrt{s}=$ 4.23, 4.26 and 4.36 GeV
• Observation of $X(3872)$ in $B\to X(3872)K\pi$ decays
• Comment on the narrow charmonium state of Belle at 3871.8 MeV as a deuson
• Y(4260) --> gamma + X(3872) in the diquarkonium picture
• Exotic mesons with hidden charm as diquark-antidiquark states
• Where are ${\chi }_{cJ}(3P)$?
• Holographic Hadro-Quarkonium
• Exotic Four Quark Matter: $Z_1(4475)$
• Molecular Interpretation of the Supercharmonium State Z(4475)
• Searching for the $X(3872)$ and $Z_c^{+}(3900)$ on HISQ lattices
• Measurements of $B\to \bar{D}{D}_{s0}^{\ast +}(2317)$ decay rates and a search for isospin partners of the $D_{s0}^{\ast +}(2317)$
• Search for B decays to final states with the eta_c meson
• Processes $e^{+}{e}^{-}\to c\bar{c}c\bar{c}$ and $e^{+}{e}^{-}\to J/\psi +gg$ at $\sqrt{s}=10.59$ GeV
• $XYZ$ particles at Belle
• Constraints from precision measurements on the hadron-molecule interpretation of X,Y,Z resonances
• The Rise and Fall of Pentaquarks in Experiments
• An introduction to lattice hadron spectroscopy for students without quantum field theoretical background
• Mass of Y(3940) in Bethe-Salpeter equation for quarks
• Theory of Scalars
• Charmed scalar mesons and related
• On the nature of the Roper resonance
• Positive parity $D_s$ mesons

Cited by in corpus (524)

• Hadronic molecules
• Pentaquark and Tetraquark states
• An updated review of the new hadron states
• Electron-Ion Collider in China
• Observation of structure in the $J/\psi$-pair mass spectrum
• Study of the doubly charmed tetraquark $T_{cc}^{+}$
• Threshold cusps and triangle singularities in hadronic reactions
• Multiquark States
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• A survey of heavy-heavy hadronic molecules
• Amplitude analysis of the $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decay
• STCF Conceptual Design Report: Volume 1 -- Physics & Detector
• 50 Years of Quantum Chromodynamics
• Study of doubly heavy tetraquarks in Lattice QCD
• Observation of a near-threshold structure in the $K^{+}$ recoil-mass spectra in $e^{+}{e}^{-}\to K^{+}(D_s^{-}{D}^{\ast 0}+D_s^{\ast -}{D}^0)$
• Model-independent study of structure in $B^{+}\to D^{+}{D}^{-}{K}^{+}$ decays
• Heavy quark spin symmetric molecular states from ${\bar{D}}^{(\ast )}{\Sigma }_c^{(\ast )}$ and other coupled channels in the light of the recent LHCb pentaquarks
• Interpretation of the LHCb $P_c$ States as Hadronic Molecules and Hints of a Narrow $P_c(4380)$
• The ALICE experiment: a journey through QCD
• Exploring the molecular scenario of $P_c(4312)$, $P_c(4440)$, and $P_c(4457)$
• Observation of a $J/\psi \Lambda$ resonance consistent with a strange pentaquark candidate in $B^{-}\to J/\psi \Lambda \bar{p}$ decays
• Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
• Explaining the Many Threshold Structures in the Heavy-Quark Hadron Spectrum
• Isospin breaking decays as a diagnosis of the hadronic molecular structure of the $P_c(4457)$
• All-heavy tetraquarks
• Lattice QCD investigation of a doubly-bottom $\bar{b}\bar{b}ud$ tetraquark with quantum numbers $I(J^P)=0(1^{+})$
• Establishing the first hidden-charm pentaquark with strangeness
• The hidden charm pentaquark states and ${\Sigma }_c{\bar{D}}^{(\ast )}$ interaction in chiral perturbation theory
• 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
• Determination of the pole position of the lightest hybrid meson candidate
• Observation of an excess of di-charmonium events in the four-muon final state with the ATLAS detector
• Heavy tetraquarks in the relativistic quark model
• Towards a theory of hadron resonances
• Doubly-heavy tetraquarks
• $P_c(4457{)}^{+}$, $P_c(4440{)}^{+}$, and $P_c(4312{)}^{+}$: molecules or compact pentaquarks?
• Discovery potential of stable and near-threshold doubly heavy tetraquarks at the LHC
• Interpretation of the LHCb Pc(4312) Signal
• Study of $e^{+}{e}^{-}\to \gamma \omega J/\psi$ and Observation of $X(3872)\to \omega J/\psi$
• Diffusion Monte Carlo calculations of fully-heavy (multiquark) bound states
• Fully-heavy tetraquark spectra and production at hadron colliders
• Coupled-channel interpretation of the LHCb double-$J/\psi$ spectrum and hints of a new state near the $J/\psi J/\psi$ threshold
• Doubly Charmed Tetraquark $T_{cc}^{+}$ from Lattice QCD near Physical Point
• Revisiting the nature of the $P_c$ pentaquarks
• A study of $cc\bar{c}\bar{c}$ tetraquark decays in 4 muons and in $D^{(\ast )}{\bar{D}}^{(\ast )}$ at LHC
• Molecular picture for the $X_0(2866)$ as a $D^{\ast }{\bar{K}}^{\ast }$ $J^P=0^{+}$ state and related $1^{+},2^{+}$ states
• Masses of doubly heavy tetraquarks $T_{Q{Q}^{\prime }}$ in a relativized quark model
• On the nature of near-threshold bound and virtual states
• Towards a new paradigm for heavy-light meson spectroscopy
• Prospects of discovering stable double-heavy tetraquarks at a Tera-$Z$ factory
• Tetraquark operators in lattice QCD and exotic flavour states in the charm sector
• $X_0(2900)$ and $X_1(2900)$: hadronic molecules or compact tetraquarks
• Selected Science Opportunities for the EicC
• Deciphering the mechanism of near-threshold $J/\psi$ photoproduction
• Precision computation of hybrid static potentials in SU(3) lattice gauge theory
• Luminosities and energies of $e^{+}{e}^{-}$ collision data taken between $\sqrt{s}$=4.612 GeV and 4.946 GeV at BESIII
• Precision Studies of QCD in the Low Energy Domain of the EIC
• PANDA Phase One
• Hidden-charm and bottom tetra- and pentaquarks with strangeness in the hadro-quarkonium and compact tetraquark models
• Decays of $P_c$ into $J/\psi N$ and ${\eta }_{c}N$ with heavy quark spin symmetry
• $QQ\bar{q}\bar{q}$ in a chiral constituent quark model
• On the mechanism of $T_{4c}(6900)$ tetraquark production
• Hadronic molecules in B decays
• Scattering amplitudes from finite-volume spectral functions
• Spectroscopy of the hidden-charm $[qc][\bar{q}\bar{c}]$ and $[sc][\bar{s}\bar{c}]$ tetraquarks
• Novel Method for Precisely Measuring the $X(3872)$ Mass
• The Present and Future of QCD
• $Z_{cs}(3985{)}^{-}$ as the $U$-spin partner of $Z_c(3900{)}^{-}$ and implication of other states in the ${\text{SU(3)}}_F$ symmetry and heavy quark symmetry
• The nature of $X(3872)$ from high-multiplicity $pp$ collisions
• Triangle singularity as the origin of $X_0(2900)$ and $X_1(2900)$ observed in $B^{+}\to D^{+}{D}^{-}{K}^{+}$
• Effective range expansion for narrow near-threshold resonances
• Deciphering the nature of X(3872) in heavy ion collisions
• Evidence for an ${\eta }_c(1S){\pi }^{-}$ resonance in $B^0\to {\eta }_c(1S)K^{+}{\pi }^{-}$ decays
• QCD and the Strange Baryon Spectrum
• Search for beautiful tetraquarks in the ${\rm Y}(1S)\mu \mu$ invariant-mass spectrum
• Some decay properties of hidden-charm pentaquarks as baryon-meson molecules
• Open charm and bottom tetraquarks in an extended relativized quark model
• The Dynamical Diquark Model: First Numerical Results
• Light-Meson Spectroscopy with COMPASS
• Magnetic dipole moments of the hidden-charm pentaquark states: $P_c(4440)$, $P_c(4457)$ and $P_{cs}(4459)$
• Study of the $DK$ interaction with femtoscopic correlation functions
• The baryo-quarkonium picture for hidden-charm and bottom pentaquarks and LHCb $P_{\mathrm{c}}(4380)$ and $P_{\mathrm{c}}(4450)$ states
• Magnetic dipole moments of the $T_{cc}^{+}$ and $Z_V^{++}$ tetraquark states
• Molecular states from $D^{(\ast )}{\bar{D}}^{(\ast )}/B^{(\ast )}{\bar{B}}^{(\ast )}$ and $D^{(\ast )}{D}^{(\ast )}/{\bar{B}}^{(\ast )}{\bar{B}}^{(\ast )}$ interactions
• Spectrum of the Hidden-Bottom and the Hidden-Charm/Strange Exotics in the Dynamical Diquark Model
• A study of the decays of $S-$wave ${\bar{D}}^{\ast }{K}^{\ast }$ hadronic molecules: the scalar $X_0(2900)$ and its spin partners $X_{J(J=1,2)}$
• Probing new types of $P_c$ states inspired by the interaction between an $S$-wave charmed baryon and an anticharmed meson in a $\bar{T}$ doublet state
• Systematic studies of charmonium-, bottomonium-, and $B_c$-like tetraquark states
• Spectrum and rearrangement decays of tetraquark states with four different flavors
• The $X_0(2900)$ and its heavy quark spin partners in molecular picture
• $P_c(4312{)}^{+}$, $P_c(4380{)}^{+}$, and $P_c(4457{)}^{+}$ as double triangle cusps
• Study of the ${\psi }_2(3823)$ and ${\chi }_{c1}(3872)$ states in $B^{+}\to \left(J\psi {\pi }^{+}{\pi }^{-}\right)K^{+}$ decays
• Masses and radiative decay widths of S- and P-wave singly-, doubly- and triply-heavy charm and bottom baryons
• Observation of multiplicity-dependent prompt ${\chi }_{c1}(3872)$ and $\psi (2S)$ production in $pp$ collisions
• From the lineshape of the $X(3872)$ to its structure
• What can we learn from the electromagnetic properties of hidden-charm molecular pentaquarks with single strangeness?
• A new look at the $P_{cs}$ states from a molecular perspective
• Novel approaches in Hadron Spectroscopy
• Strong decays of higher charmonium states into open-charm meson pairs
• The BESIII Physics Programme
• Construction of $bb\bar{u}\bar{d}$ tetraquark states on lattice with NRQCD bottom and HISQ up/down quarks
• Mass spectrum of the hidden-charm pentaquarks in the compact diquark model
• Observation of the decay $X(3872)\to {\pi }^0{\chi }_{c1}(1P)$
• Hidden charm pentaquarks: mass spectrum, magnetic moments, and photocouplings
• Hunting for states in the recent LHCb di-$J/\psi$ invariant mass spectrum
• Weak decays of the axial-vector tetraquark $T_{bb;\bar{u}\bar{d}}^{-}$
• Emergence of molecular-type characteristic spectrum of hidden-charm pentaquark with strangeness embodied in the $P_{\psi s}^{\Lambda }(4338)$ and $P_{cs}(4459)$
• Investigation of magnetic moment of $P_{cs}(4338)$ and $P_{cs}(4459)$ pentaquark states
• Producing fully-charm structures in the $J/\psi$-pair invariant mass spectrum
• Observation of the $Y(4220)$ and $Y(4360)$ in the process $e^{+}{e}^{-}\to \eta J/\psi$
• The doubly charmed pseudoscalar tetraquarks $T_{cc;\bar{s}\bar{s}}^{++}$ and $T_{cc;\bar{d}\bar{s}}^{++}$
• A search for the exotic meson $X(5568)$ with the Collider Detector at Fermilab
• The $\Omega (2012)$ as a hadronic molecule
• Analysis of the hidden-charm tetraquark mass spectrum with the QCD sum rules
• $K^{\ast }$ mesons with hidden charm arising from $KX(3872)$ and $K{Z}_c(3900)$ dynamics
• Prediction of hidden-charm pentaquarks with double strangeness
• Production of $X(3872)$ at High Multiplicity
• Compositeness of S-wave weakly-bound states from next-to-leading order Weinberg's relations
• Threshold corrections of ${\chi }_{\mathrm{c}}(2P)$ and ${\chi }_{\mathrm{b}}(3P)$ states and $J/\psi \rho$ and $J/\psi \omega$ transitions of the $X(3872)$ in a coupled-channel model
• Molecular picture for $X_0(2900)$ and $X_1(2900)$
• XYZ spectroscopy at electron-hadron facilities: Exclusive processes
• Landau equation and QCD sum rules for the tetraquark molecular states
• Phenomenology of Relativistic $3\to 3$ Reaction Amplitudes within the Isobar Approximation
• How to reveal the nature of three or more pentaquark states?
• Toward charged $Z_{cs}(3985)$ structure under a reflection mechanism
• Fully-heavy tetraquark production by $\gamma \gamma$ interactions in hadronic collisions at the LHC
• Approximate Hamiltonian for baryons in heavy-flavor QCD
• Hidden-charm pentaquarks with triple strangeness due to the ${\Omega }_c^{(\ast )}{\bar{D}}_s^{(\ast )}$ interactions
• Dalitz-plot decomposition for three-body decays
• ${\rm Y}$ photo-production on the proton at the Electron-Ion Collider
• A possible partner state of the $Y(2175)$
• Four-quark states from functional methods
• Pole position of the $a_1(1260)$ from $\tau$-decay
• Triangle Singularity as the Origin of the $a_1(1420)$
• Pole determination of $P_{\psi s}^{\Lambda }(4338)$ and possible $P_{\psi s}^{\Lambda }(4255)$ in $B^{-}\to J/\psi \Lambda \bar{p}$
• Tetraquarks in large-$N_c$ QCD
• Revisit the isospin violating decays of $X(3872)$
• Implications of the $Z_{cs}(3985)$ and $Z_{cs}(4000)$ as two different states
• One Born$-$Oppenheimer Effective Theory to rule them all: hybrids, tetraquarks, pentaquarks, doubly heavy baryons and quarkonium
• Predicting the ${\bar{D}}_s^{(\ast )}{D}_s^{(\ast )}$ bound states as the partners of $X(3872)$
• A combined analysis of the $Z_c(3900)$ and the $Z_{cs}(3985)$ exotic states
• Search for $\bar{b}\bar{b}us$ and $\bar{b}\bar{c}ud$ tetraquark bound states using lattice QCD
• Study the molecular nature of $\sigma$, $f_0(980)$, and $a_0(980)$ states
• Strange hadrocharmonium
• $S$- and $P$-wave fully-strange tetraquark states from QCD sum rules
• Hybrid static potentials in SU(3) lattice gauge theory at small quark-antiquark separations
• Fine Structure of Pentaquark Multiplets in the Dynamical Diquark Model
• Exotic double-charm molecular states with hidden or open strangeness and around $4.5\sim 4.7$ GeV
• Excited $K$ meson, $K_c(4180)$, with hidden charm as a $D\bar{D}K$ bound state
• Tetraquark-adequate formulation of QCD sum rules
• Three-body scattering: Ladders and Resonances
• Triangle Singularity in the Production of $T_{cc}^{+}$(3875) and a Soft Pion
• Magnetic dipole moment of the $Z_{cs}(3985)$ state: diquark-antidiquark and molecular pictures
• Hidden-bottom and -charm hexaquark states in QCD sum rules
• Study of the $X^{\pm }(5568)$ state with semileptonic decays of the $B_s^0$ meson
• $X(3872)$ as a four-quark state in a Dyson-Schwinger/Bethe-Salpeter approach
• Heavy Flavour Physics and CP Violation at LHCb: a Ten-Year Review
• Investigating new type of doubly-charmed molecular tetraquarks composed of the charmed meson in $H$-doublet and the charmed meson in $T$-doublet
• Photoproduction of hidden-bottom pentaquark and related topics
• Molecular ${\Omega }_b$ states
• The Spectrum of $P$-Wave Hidden-Charm Exotic Mesons in the Diquark Model
• Charmed-strange tetraquarks and their decays in a potential quark model
• Nature of the $Y(4260)$: A light-quark perspective
• Universal behavior of mass gaps existing in the single heavy baryon family
• Correlation of the hidden-charm molecular tetraquarks and the charmoniumlike structures existing in the $B\to XYZ+K$
• Prediction of a narrow exotic hadronic state with quantum numbers $J^{PC}=0^{--}$
• Exploring the electromagnetic properties of the ${\Xi }_c^{(\prime ,\ast )}{\bar{D}}_s^{\ast }$ and ${\Omega }_c^{(\ast )}{\bar{D}}_s^{\ast }$ molecular states
• Newly observed $X(4630)$: a new charmoniumlike molecule
• Selected strong decays of pentaquark State $P_c(4312)$ in a chiral constituent quark model
• Production of exotic hadrons in $pp$ and nuclear collisions
• Hybrid static potential flux tubes from SU(2) and SU(3) lattice gauge theory
• Hidden charmed states and multibody color flux-tube dynamics
• The study of $\gamma \gamma \to \gamma \psi (2S)$ at Belle
• Going in quest of potential tetraquark interpretations for the newly observed $T_{\psi \psi }$ states in light of the diquark-antidiquark scenarios
• Magnetic moments of the spin-1/2 singly charmed baryons in covariant baryon chiral perturbation theory
• The Dynamical Diquark Model: Fine Structure and Isospin
• Investigation of the possible $D{\bar{D}}^{\ast }$/$B{\bar{B}}^{\ast }$ and $D{D}^{\ast }$/$\bar{B}{\bar{B}}^{\ast }$ molecule states
• Electromagnetic properties of doubly heavy pentaquark states
• Charm-meson Triangle Singularity in $e^{+}{e}^{-}$ Annihilation into $D^{\ast 0}{\bar{D}}^0+\gamma$
• Searching for a $D\bar{D}$ bound state with the $\psi (3770)\to \gamma D^0{\bar{D}}^0$ decay
• Observation of resonance structures in $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{\psi }_2(3823)$ and mass measurement of ${\psi }_2(3823)$
• Hunting for tetraquarks in ultra-pheripheral heavy ion collisions
• Photoproduction of strange hidden-charm and hidden-bottom states
• Is $X(7200)$ the heavy anti-quark diquark symmetry partner of $X(3872)$?
• Classifying Pole of Amplitude Using Deep Neural Network
• Pentaquark states with the $QQQq\bar{q}$ configuration in a simple model
• What can we learn about light-meson interactions at electron-positron colliders?
• Surveying the mass spectra and the electromagnetic properties of the ${\Xi }_c^{(\prime ,\ast )}{D}^{(\ast )}$ molecular pentaquarks
• Chiral effective theory of diquarks and the U_A(1) anomaly
• Hidden-charm pentaquark states through the current algebra: From their productions to decays
• Triangle Singularity in the Production of $X(3872)$ and a Photon in $e^{+}{e}^{-}$ Annihilation
• New Perspective on Hybrid Mesons
• Triple-charm molecular states composed of $D^{\ast }{D}^{\ast }D$ and $D^{\ast }{D}^{\ast }{D}^{\ast }$
• Model independent analysis of coupled-channel scattering: a deep learning approach
• Observation of sizeable $\omega$ contribution to ${\chi }_{c1}(3872)\to {\pi }^{+}{\pi }^{-}J/\psi$ decays
• Fully-heavy structures in the invariant mass spectrum of $J/\psi \psi (3686)$, $J/\psi \psi (3770)$, $\psi (3686)\psi (3686)$, and $J/\psi {\rm Y}(1S)$ at hadron colliders
• QCD sum rule studies on the $ss\bar{s}\bar{s}$ tetraquark states with $J^{PC}=1^{+-}$
• Fully-heavy tetraquark states and their evidences in the LHC observations
• Understanding the $0^{++}$ and $2^{++}$ charmonium(-like) states near 3.9 GeV
• A new group of doubly charmed molecule with $T$-doublet charmed meson pair
• Decay behaviors of the fully-bottom and fully-charm tetraquark states
• Heavy baryon spectrum with chiral multiplets of scalar and vector diquarks
• Production of $X(3872)$ Accompanied by a Pion in $B$ Meson Decay
• Triply heavy tetraquark states
• The exotic meson ${\pi }_1(1600)$ with $J^{PC}=1^{-+}$ and its decay into $\rho (770)\pi$
• Analysis of the fully-heavy pentaquark states via the QCD sum rules
• Heavy exotic scalar meson $T_{bb;\bar{u}\bar{s}}^{-}$
• Magnetic dipole moments of the $Z_c(4020{)}^{+}$, $Z_c(4200{)}^{+}$, $Z_{cs}(4000{)}^{+}$ and $Z_{cs}(4220{)}^{+}$ states in light-cone QCD
• Radial and orbital Regge trajectories in heavy quarkonia
• Revisiting $X(3872)\to D^0{\bar{D}}^0{\pi }^0$ in XEFT
• The Scalar Hexaquark $uuddss$: a Candidate to Dark Matter?
• Masses and Magnetic Moments of Doubly Heavy Tetraquarks via Diffusion Monte Carlo Method
• Deep Learning Exotic Hadrons
• Probing the electromagnetic properties of the ${\Sigma }_c^{(\ast )}{D}^{(\ast )}$-type doubly charmed molecular pentaquarks
• Can the state $Y(4626)$ be a $P$-wave tetraquark state $[cs][\bar{c}\bar{s}]$?
• Nucleon-charmonium interactions from lattice QCD
• Magnetic moments of the doubly charged axial-vector $T_{cc}^{++}$ states
• $\bar{K}\Lambda$ molecular explanation to the newly observed $\Xi (1620{)}^0$
• Heavy hybrid decays to quarkonia
• Triply-heavy tetraquarks in an extended relativized quark model
• 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
• Confirming the existence of a new higher charmonium $\psi (4500)$ by the newly released data of $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$
• ${\Sigma }_{c}N$ interaction in chiral perturbation theory
• Settling the $Z_c(4600)$ in the charged charmonium-like family
• Search for a $D\bar{D}$ bound state in the ${\Lambda }_b\to \Lambda D\bar{D}$ process
• Molecular charmed baryons and pentaquarks from light-meson exchange saturation
• Decay properties of $P_c$ states through the Fierz rearrangement
• Predicting isovector charmonium-like states from X(3872) properties
• Electromagnetic form factors of the $B_c$-like tetraquarks: molecular and diquark-antidiquark pictures
• Dispersive analysis of the $\gamma \gamma \to D\bar{D}$ data and the confirmation of the $D\bar{D}$ bound state
• Radiative decays of the spin-$2$ partner of $X(3872)$
• Double-charm heptaquark states composed of two charmed mesons and one nucleon
• Radiative decays and magnetic moments of the predicted $B_c$-like molecules
• Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
• $Z_c(4100)$ and $Z_c(4200)$ as hadrocharmonium
• Insights into $Z_b(10610)$ and $Z_b(10650)$ from dipion transitions from ${\rm Y}(10860)$
• Possibility of $T_{c\bar{s}}(2900)$ as the resonance-like structure induced by threshold effects
• $D^{\pm }{D}^{\ast \mp }$ Hadronic Atom as a Key to Revealing the $X(3872)$ Mystery
• Remarks on the Heavy-Quark Flavour Symmetry for doubly heavy hadronic molecules
• Improved understanding of the peaking phenomenon existing in the new di-$J/\psi$ invariant mass spectrum from the CMS Collaboration
• 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
• Galilean-Invariant XEFT at Next-to-Leading Order
• A high-energy QCD portal to exotic matter: Heavy-light tetraquarks at the HL-LHC
• ${\eta }_{\mathrm{c}}$- and $J/\psi$-isoscalar meson bound states in the hadro-charmonium picture
• Mass Predictions of Vector ($1^{--}$) Double-gluon Heavy Quarkonium Hybrids from QCD Sum Rules
• Production of hidden-charm strange pentaquarks $P_{cs}$ from the $K^{-}p\to J/\psi \Lambda$ reaction
• New type of doubly charmed molecular pentaquarks containing most strange quarks: Mass spectra, radiative decays, and magnetic moments
• Hidden-flavour four-quark states in the charm and bottom region
• The X(3872) tetraquarks in B and B_s decays
• Tetraquark-adequate QCD sum rules for quark-exchange processes
• $X(3872)$, $X(4014)$, and their bottom partners at finite temperature
• $D{\bar{D}}^{\ast }$ scattering and ${\chi }_{c1}(3872)$ in nuclear matter
• Are there narrow flavor-exotic tetraquarks in large-$N_c$ QCD?
• Triangle singularity appearing as an $X(3872)$-like peak in $B\to (J/\psi {\pi }^{+}{\pi }^{-})K\pi$
• $X(3872)$ as virtual companion pole of the charm-anticharm state ${\chi }_{c1}(2P)$
• QCD sum rule studies on the $ss\bar{s}\bar{s}$ tetraquark states of $J^{PC}=0^{-+}$
• $P_c$ states and their open-charm decays with the complex scaling method
• Three-body molecules $\bar{D}{\bar{D}}^{\ast }{\Sigma }_c$- understanding the nature of $T_{cc}$, $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$
• Study of three-flavored heavy dibaryons using lattice QCD
• Quark structure of the ${\chi }_{\mathrm{c}}(3P)$ and $X(4274)$ resonances and their strong and radiative decays
• Three-body model for $K(1460)$ resonance
• Bound states in the B-matrix formalism for the three-body scattering
• Precise determination of the pole position of the exotic $Z_c(3900)$
• Revisiting hidden-charm pentaquarks from QCD sum rules
• Structure and production mechanism of the enigmatic $X(3872)$ in high-energy hadronic reactions
• Studying the ${\bar{D}}_{1}K$ molecule in the Bethe-Salpeter equation approach
• Quantum Mechanics and modelling of physical reality
• Classifying near-threshold enhancement using deep neural network
• Photoproduction of pentaquarks states at the LHC
• Prompt production of the hidden charm pentaquarks in the LHC
• Features of $\pi \Delta$ Photoproduction at High Energies
• $D_{s0}(2590)$ as a dominant $c\bar{s}$ state with a small $D^{\ast }K$ component
• Production of the $Z_b^{(\prime )}$ states from the ${\rm Y}(5S,6S)$ decays
• Global coupled-channel analysis of $e^{+}{e}^{-}\to c\bar{c}$ processes in $\sqrt{s}=3.75-4.7$ GeV
• Mass-Spectroscopy of hidden charm and hidden strange tetraquarks in diquark-antidiquark approach
• Study for a model-independent pole determination of overlapping resonances
• Charmonium spectrum in an unquenched quark model
• The electromagnetic multipole moments of the charged open-flavor $Z_{\bar{c}q}$ states
• The interplay between compact and molecular structures in tetraquarks
• The structure of the X(3872) as explained by a Diffusion Monte Carlo calculation
• Estimates of the $X(3872)$ Cross Section at a Hadron Collider
• Near-threshold Spectrum from Uniformized Mittag-Leffler Expansion -Pole Structure of $Z(3900)$-
• Production of $Z_{cs}$ in $B$ and $B_s$ decay
• Holographic charm and bottom pentaquarks II: Open and hidden decay widths
• $Z_{cs}$ states from the $D_s^{\ast }{\bar{D}}^{\ast }$ and $J/\psi K^{\ast }$ coupled channels: Signal in $B^{+}\to J/\psi \varphi K^{+}$ decay
• Modification of ${\chi }_{c1}$(3872) and $\psi$(2$S$) production in $p$Pb collisions at $\sqrt{s_{NN}}=8.16$ TeV
• Identify the hidden charm pentaquark signal from non-resonant background in electron-proton scattering
• Displaced $B_c^{-}$ mesons as an inclusive signature of weakly decaying double beauty hadrons
• Mapping a new cluster of charmoniumlike structures at $e^{+}{e}^{-}$ collisions
• Possible Molecular States Composed of Doubly Charmed Baryons with Couple-channel Effect
• Light axial-vector and vector resonances $X(2100)$ and $X(2239)$
• Cluster reducibility of multiquark operators
• Searching for doubly charmed tetraquark candidates $T_{cc}$ and $T_{cc\bar{s}}$ in $B_c$ decays
• The scalar exotic resonances X(3915), X(3960), X(4140)
• Photo- and electro-production of narrow exotic states: from light quarks to charm and up to bottom
• Constructing the $J^{P(C)}=1^{-(+)}$ light flavor hybrid nonet with the newly observed ${\eta }_1(1855)$
• Disentangling different structures in heavy-light four-quark states
• Investigation of $J/\psi \to \gamma {\pi }^0\eta ({\pi }^{+}{\pi }^{-},{\pi }^0{\pi }^0)$ radiative decays including final-state interactions
• Semi-inclusive lepto-production of hidden-charm exotic hadrons
• Radiative and $\rho$ transitions between heavy quarkonium and isovector four-quark states
• Deciphering the $X(3872)$ via its polarization in prompt production at the CERN LHC
• Radiative and pionic transitions $Z_c(4020{)}^0\to X(3872)\gamma$ and $Z_c(4020{)}^{\pm }\to X(3872){\pi }^{\pm }$
• Possible bound states with hidden bottom from ${\bar{K}}^{(\ast )}{B}^{(\ast )}{\bar{B}}^{(\ast )}$ systems
• Production of $X(3872)$ Accompanied by a Soft Pion at Hadron Colliders
• Fragmentation functions for axial-vector heavy tetraquarks: A TQ4Q1.1 update
• Diabatic description of charmoniumlike mesons II: mass corrections and strong decay widths
• Mass spectra of $N\Omega$ dibaryons in the ${}^3{S}_1$ and ${}^5{S}_2$ channels
• Flavor Physics at the CEPC: a General Perspective
• Doubly-Charged $T_{cc}^{++}$ States in the Dynamical Diquark Model
• XYZ spectroscopy at electron-hadron facilities II: Semi-inclusive processes with pion exchange
• Production of the $X(4014)$ as the spin-2 partner of $X(3872)$ in $e^{+}{e}^{-}$ collisions
• Exotic $\Omega \Omega$ dibaryon states in a molecular picture
• Observation of $\Omega (2012{)}^{-}\to \Xi (1530)\bar{K}$ and measurement of the effective couplings of $\Omega (2012{)}^{-}$ to $\Xi (1530)\bar{K}$ and $\Xi \bar{K}$
• Colloquium: Hadron Production in Open-charm Meson Pair at $e^{+}{e}^{-}$ Collider
• Production of hidden-charm and hidden-bottom pentaquark states in electron-proton collisions
• ${\Xi }_{bb}$ and ${\Omega }_{bbb}$ molecular states
• Gluon mass scale through the Schwinger mechanism
• Are the XYZ states unconventional states or conventional states with unconventional properties?
• Tri-meson bound state $BB{B}^{\ast }$ via delocalized $\pi$~Bond
• Holographic charm and bottom pentaquarks I: Mass spectra with spin effects
• Cross section measurements of the $e^{+}{e}^{-}\to D^{\ast +}{D}^{\ast -}$ and $e^{+}{e}^{-}\to D^{\ast +}{D}^{-}$ processes at center-of-mass energies from 4.085 to 4.600 GeV
• The nature of ${\chi }_{c1}\left(3872\right)$ and $T_{cc}^{+}\left(3875\right)$
• $P$-wave charmonium contribution to hidden-charm states from reanalysis of lattice QCD data
• Charmonium: Conventional and $XYZ$ States in a Relativistic Screened Potential Model
• A plausible explanation of ${\rm Y}(10860)$
• Decay $X(3872)\to {\pi }^0{\pi }^{+}{\pi }^{-}$ and $S$-wave $D^0{\bar{D}}^0\to {\pi }^{+}{\pi }^{-}$ scattering length
• Decay modes of the scalar exotic meson $T_{bs;\overline{u}\overline{d}}^{-}$
• Observation of ${\Lambda }_c^{+}\to \Lambda a_0(980{)}^{+}$ and Evidence for $\Sigma (1380{)}^{+}$ in ${\Lambda }_c^{+}\to \Lambda {\pi }^{+}\eta$
• Do near-threshold molecular states mix with neighbouring $\bar{Q}Q$ states?
• Exotic Hadrons from Scattering in the Diabatic Dynamical Diquark Model
• $D^{+}{D}^{-}$ hadronic atom and its production in $pp$ and $p\bar{p}$ collisions
• Regge trajectories for the heavy-light diquarks
• On tetraquarks with hidden charm and strangeness as phi-psi(2S) hadrocharmonium
• Hadronic Molecular States Composed of Spin-$\frac{3}{2}$ Singly Charmed Baryons
• $J/\psi$ decay into $\varphi (\omega )$ and vector-vector molecular states
• Study of charmonium and charmonium-like contributions in $B^{+}\to J/\psi \eta K^{+}$ decays
• Hidden-flavor pentaquarks
• Semi-inclusive electroproduction of hidden-charm and double-charm hadronic molecules
• How higher charmonia shape the puzzling data of the $e^{+}{e}^{-}\to \eta J/\psi$ cross section
• The $\sigma$ and $\rho$ coupling constants for the charmed and beauty mesons
• $\sigma$ exchange in the one-boson exchange model involving the ground state octet baryons
• Heavy ${\Omega }_c$ and ${\Omega }_b$ baryons in the quark model
• Production of $X(3872)$ and a Photon in $e^{+}{e}^{-}$ Annihilation
• The $\mathbf{X}(3872)$'s excitation and its connection with production at hadron colliders
• ${\pi }^{-}p\to {\eta }^{(\prime )}{\pi }^{-}p$ in the double-Regge region
• Decays of Pentaquarks in Hadrocharmonium and Molecular Pictures
• The role of the $\omega (4S)$ and $\omega (3D)$ states in mediating the $e^{+}{e}^{-}\to \omega \eta$ and $\omega {\pi }^0{\pi }^0$ processes
• Theoretical investigation of the molecular nature of $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ and the possibility of observing the $D\bar{D}K$ bound state $K_{c\bar{c}}(4180)$ in inclusive $e^{+}{e}^{-}\to c\bar{c}$ collisions
• Investigations on the light hadron decays of $Z_b(10610)$ and $Z_b(10650)$
• Decay properties of the $Z_c(3900)$ through the Fierz rearrangement
• Investigating the M1 radiative decay behaviors and the magnetic moments of the predicted triple-charm molecular-type pentaquarks
• Covalent hadronic molecules induced by shared light quarks
• What is the right formalism to search for resonances? II. The pentaquark chain
• Eight very excited spectra and one possible axion in SU(3) lattice gauge theory
• Measurement of $e^{+}{e}^{-}\to \gamma {\chi }_{c0,c1,c2}$ cross sections at center-of-mass energies between 3.77 and 4.60 GeV
• Entanglement suppression and low-energy scattering of heavy mesons
• Probing hidden-bottom pentaquarks in fixed-target collisions at the LHC
• Spectroscopic Assignments of the Excited $B$-Mesons
• Dispersive analysis of the isospin breaking in the $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ and $X(3872)\to J/\psi {\pi }^{+}{\pi }^0{\pi }^{-}$ decays
• Towards scalable bound-to-resonance extrapolations for few- and many-body systems
• Towards a precision determination of the $X(6200)$ parameters from data
• On the two-body decay processes of the predicted three-body $K^{\ast }(4307)$ resonance
• The role of charged exotic states in $e^{+}{e}^{-}\to \psi (2S){\pi }^{+}{\pi }^{-}$
• Magnetic moments of the vector hidden-charmed tetraquark states
• Decay properties of the $X(3872)$ through the Fierz rearrangement
• Is two-poles' $\Lambda (1405)$ one state or two?
• Spectrum of two-flavored spin-zero heavy dibaryons in lattice QCD
• Holographic charm and bottom pentaquarks III: Excitations through photo-production of heavy mesons
• Hadronic molecular states with the quark contents $bc\bar{s}\bar{q}$, $b\bar{c}s\bar{q}$, and $b\bar{c}\bar{s}q$
• The role of electromagnetic interaction in the $X(3872)$ and its analogs
• Regge trajectories for the light diquarks
• Electroweak, QCD and flavour physics studies with ATLAS data from Run 2 of the LHC
• Baryons under Strong Magnetic Fields or in Theories with Space-dependent $\theta$-term
• Unravelling Pentaquarks with Born--Oppenheimer effective theory
• Towards the understanding of heavy quarks hadronization: from leptonic to heavy-ion collisions
• The spin parity of $Z_c^{-}$(4100), $Z_1^{+}$(4050) and $Z_2^{+}$(4250)
• Bottomonium spectrum with a Dirac potential model in the momentum space
• Identifying an $\mathrm{X}(3872)$ tetraquark state versus a molecular state by formation time, velocity and temperature in relativistic nuclear collisions
• Properties of $Z_c(3900)$ tetraquark in a cold nuclear matter
• Radiative Transitions of Charmoniumlike Exotics in the Dynamical Diquark Model
• $X$ structures in $B^{+}\to J/\psi \varphi K^{+}$ as one-loop and double-triangle threshold cusps
• Molecular pentaquark states with open charm and bottom flavors
• Production of charmonium ${\chi }_{cJ}(2P)$ plus one $\omega$ meson by $e^{+}{e}^{-}$ annihilation
• Triangle singularity in $B^0\to {\pi }^{-}{K}^{+}X(3872)$ via the $D_{s1}\bar{D}{D}^{\ast }$ loop and possible precise measurement of the $X(3872)$ mass
• New type of hydrogenlike charm-pion or charm-kaon matter
• Triply heavy baryon spectroscopy revisited
• The study on the structure of exotic states ${\chi }_{c1}(3872)$ via beauty-hadron decays in $pp$ collisions at $\sqrt{s}=8\mathrm{TeV}$
• Open charm and bottom meson-nucleon potentials à la nuclear force
• Study of $e^{+}{e}^{-}\to D^{+}{D}^{-}{\pi }^{+}{\pi }^{-}$ at center-of-mass energies from 4.36 to 4.60 GeV
• Triply-charmed hexaquark states with the QCD sum rules
• Production of $X_b$ via ${\rm Y}(5S,6S)$ radiative decays
• Three-particle formalism for multiple channels: the $\eta \pi \pi +K\overline{K}\pi$ system in isosymmetric QCD
• Universal non-resonant explanation to charmoniumlike structures $Z_c(3885)$ and $Z_c(4025)$
• Mass Spectra of $qq\bar{q}\bar{q}$, $ss\bar{s}\bar{s}$ and $qq\bar{s}\bar{s}$ Tetraquarks using Regge Phenomenology
• 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
• Spectroscopic Properties of Double-Strangeness Molecular Tetraquarks
• Probing exotic $J^{PC}$ resonances from deeply bound charmoniumlike molecules: Insights for identifying exotic hadrons
• Measurements of $e^{+}{e}^{-}\to {\eta }_{\mathrm{c}}{\pi }^{+}{\pi }^{-}{\pi }^0$, ${\eta }_{\mathrm{c}}{\pi }^{+}{\pi }^{-}$ and ${\eta }_{\mathrm{c}}{\pi }^0\gamma$ at $\sqrt{s}$ from 4.18 to 4.60\,GeV, and search for a $Z_{\mathrm{c}}$ state close to the $D\bar{D}$ threshold decaying to ${\eta }_{\mathrm{c}}\pi$ at $\sqrt{s}$ = 4.23 GeV
• Two-pion exchange for coupled-channel scattering of two heavy mesons
• Weak-decay searches for $Qs\bar{u}\bar{d}$ tetraquarks
• How does the $X(3872)$ show up in $e^{+}{e}^{-}$ collisions: dip versus peak
• Triply heavy tetraquark states in a mass-splitting model
• $X$ and $Z_{cs}$ in $B^{+}\to J/\psi \varphi K^{+}$ as $s$-wave threshold cusps and alternative spin-parity assignments to $X(4274)$ and $X(4500)$
• Observation and branching fraction measurement of the decay ${\Xi }_b^{-}\to {\Lambda }_b^0{\pi }^{-}$
• Molecular states in $D_s^{(\ast )+}{\Xi }_c^{{(}^{\prime },\ast )}$ systems
• Systematics of fully heavy dibaryons
• Analysis of the $D{\bar{D}}^{\ast }K$ system with QCD sum rules
• Investigation of ${\Delta }^0{\Delta }^0$ dibaryon in QCD
• Probing the structure of ${\chi }_{c1}(3872)$ with photon transition form factors
• Structure of open-flavour four-quark states in the charm and bottom region
• Classification of Coupled-Channel Near-Threshold Structures
• Hunting for the prospective $T_{cc}$ family based on the diquark-antidiquark configuration
• $P_c(4457)$ interpreted as a $J^P=1/2^{+}$ state by ${\bar{D}}^0{\Lambda }_c^{+}(2595)$-${\pi }^0{P}_c(4312)$ interaction
• Interpretation of near-threshold peaks using the method of independent S-matrix poles
• Modifications on parameters of $Z(4430)$ in a dense medium
• $P$-wave states $T_{bb}^{-}$ from diquarks
• $J/\psi$ decay to $\varphi ,\omega ,K^{\ast 0}$ plus $f_0(1370)$, $f_0(1710)$, $K_0^{\ast }(1430)$, $f_2(1270)$, $f_2^{\prime }(1525)$ and $K_2^{\ast }(1430)$: role of the $D$-wave for tensor production
• Investigation on the bottom analogs of the $T_{cc}^{+}$
• On the emergence of heavy quark spin symmetry breaking in heavy quarkonium decays
• $Z_c$ and $Z_{cs}$ systems with operator mixing at NLO in QCD sum rules
• Quark structure of the $X(4500)$, $X(4700)$ and ${\chi }_{\mathrm{c}}(4P,5P)$ states
• Study of the resonance contributions in the ${\Xi }_b^{-}\to p{K}^{-}{K}^{-}$ decay
• Probing the structure of $X(3872)$ in photoproduction
• Pole trajectories from $S$- and $P$-wave $D{\bar{D}}^{\ast }$ interactions
• Radiative decays of the neutral $Z_c(3900)$ and $Z_c(4020)$
• Production of $1^{-+}$ exotic charmonium-like states in electron-positron collisions
• Spin and polarization analysis of $Z_{cs}$ state
• Investigation of Mass and Decay Characteristics of the Light-Strange Tetraquark
• Effective range expansion with a long-range force
• $S$-wave contributions to the $B_{(s)}\to {\chi }_{c1}(\pi \pi ,K\pi ,KK)$ decays
• A Sum-Rules Analysis of Next-to-Leading-Order (NLO) QCD Perturbative Contributions to a $J^{PC}=0^{+-}$, $du\bar{d}\bar{u}$ Tetraquark Correlator
• The XYZ mesons: what they aren't
• Possible molecules of triple-heavy pentaquarks within the extended local hidden gauge formalism
• Comment on the X(3915) nonstandard hadron candidate
• Production of the (predicted) $K^{\ast }(4307)$ in $B$ decays
• Study of $e^{+}{e}^{-}\to \eta \varphi$ via Initial State Radiation at Belle
• Mass spectra of heavy pseudoscalars using instantaneous Bethe-Salpeter equation with different kernels
• Electromagnetic properties of possible triple-charm molecular hexaquarks
• The ground states and first radial excitations of the vector tetraquark states with explicit P-waves via the QCD sum rules
• Traps in hadron spectroscopy: Thresholds, triangle singularities, etc
• $B_{s1}(5778)$ as a $B^{\ast }\bar{K}$ molecule in the Bethe-Salpeter equation approach
• Search for ${\rm Y}(1S,2S)\to Z_c^{+}{Z}_c^{(\prime )-}$ and $e^{+}{e}^{-}\to Z_c^{+}{Z}_c^{(\prime )-}$ at $\sqrt{s}$ = 10.52, 10.58, and 10.867 GeV
• Electromagnetic properties of the $D{\bar{D}}^{\ast }K$ molecular hexaquark state
• Hybrid static potentials in SU(2) lattice gauge theory at short quark-antiquark separations
• Masses and decays of the bottom-charm hybrid meson $c\bar{b}g$
• Elliptic anisotropy measurement of the f${}_0$(980) hadron in proton-lead collisions and evidence for its quark-antiquark composition
• Light-by-light scattering sum rule for radiative transitions of bottomonia
• Photoproduction of the $X(3872)$ beyond vector meson dominance: the open-charm coupled-channel mechanism
• Unveiling the Composition of the Single-Charm Molecular Pentaquarks: Insights from Radiative Decay and Magnetic Moment
• Pole analysis for the $D^{\ast }\bar{K}$-$D\overline{K^{\ast }}$ coupled-channel system
• Strong decays of $a_0$, $f_0$, $f_2$, and $K_2^{\ast }$ resonances as dynamically generated states of two vector mesons
• Light tetraquark states with the exotic quantum number $J^{PC}=3^{-+}$
• Mass spectrum of the hidden-charm hybrid states via the QCD sum rules
• Study of the $Y(4660)$ from a light-quark perspective
• Investigating full-heavy tetraquarks composed of $cc\bar{c}\bar{b}$ and $bb\bar{b}\bar{c}$
• Hidden-Charm Tetraquarks in a Mixture Model: Coupled-Channel Analysis with $c\bar{c}$ and Hadronic Molecular Components
• Investigating $S$-wave bound states composed of two pseudoscalar mesons
• Construction of general $N$-body lattice operators with arbitrary momenta
• Electromagnetic characteristics as probes into the inner structures of the predicted ${\Xi }_c^{{(}^{\prime },\ast )}{D}_s^{(\ast )}$ molecular states
• Light meson emissions of the selected charmonium-like states within compact tetraquark configurations
• Constituent Counting Rules and Exotic Hadrons
• Quark mass dependence of the low-lying charmed mesons at one loop in HH$\chi$PT
• The charmonium-like exotic hadron productions in $e^{+}{e}^{-}$ collisions at the BESIII energy with the PACIAE model
• Search for the light hadron decay ${\chi }_{c1}(3872)\to {\pi }^{+}{\pi }^{-}\eta$
• Photon-induced production of the exotic charged charmonium-like state $Z_c(3900)$ off nuclear targets and its internal structure
• $\lambda$ and $\rho$ Regge trajectories for the pentaquark $P_{cc\bar{c}bb}$ in the diquark-triquark picture
• 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
• The $X(3872)\to J/\psi \pi \gamma$ and $X(3872)\to J/\psi \pi \pi \gamma$ decays
• Constrain the ${\chi }_{cJ}\to D^{(\ast )}{\bar{D}}^{(\ast )}$ effective couplings via the $X(3872)\to {\pi }^0{\chi }_{cJ}$ decays
• 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
• Cross section measurement of $e^{+}{e}^{-}\to \eta \psi (2S)$ and search for $e^{+}{e}^{-}\to \eta \tilde{X}(3872)$
• 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
• Study of charmonium production using decays to hadronic final states with the LHCb experiment
• Branching Fractions of the $X(3872)$
• Observation of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0{\psi }_2(3823)$
• Strong Decays of Charmonia
• $Z_c(3900)$ in a hadronic molecule and a triangle singularity approach at finite temperature
• Possible ${\Sigma }_c^{\ast }\bar{\Sigma }$ molecular states
• Doubly-charmed pentaquark states in a mass splitting model
• Singly heavy baryons in nuclear matter from an SU(3) chiral soliton model
• Correction to the energy spectrum of ${}^1{S}_0$ heavy quarkonia due to two-gluon annihilation effect
• Exotic Heavy Hadrons
• Two nearby states in the $X(3872)$ region: Resolving the radiative-decay ratio tension with ${\eta }_{c2}$
• Is ${\chi }_{c1}(3872)$ generated from string breaking?
• Study of conventional and non-conventional scalar and vector mesons
• The effects of charmonium on the properties of the $1^{++}$ hidden charm poles in effective field theory
• Five-flavor molecular pentaquarks in the ${\Xi }_b^{(\prime ,\ast )}{\bar{D}}^{(\ast )}$ and ${\Xi }_c^{(\prime ,\ast )}{B}^{(\ast )}$ systems
• Quantum Numbers of the Pentaquark States $P_c^{+}$ via Symmetry Analysis
• Learning Pole Structures of Hadronic States using Predictive Uncertainty Estimation
• Spectrum of Hidden-Charm, Open-Strange Exotics in the Dynamical Diquark Model
• Non-$D\bar{D}$ Decays into Light Meson Pairs of the $D$-Wave Charmonium ${\psi }_3(3842)$
• Hadronic molecules and multiquark states
• A note on the tensor and vector exchange contributions to $K\bar{K}\to K\bar{K},D\bar{D}\to D\bar{D}$ and ${\pi }^{+}{\pi }^{-}\to {\pi }^{+}{\pi }^{-}$ reactions
• Search for the $D^{\ast }{\bar{D}}^{\ast }$ molecular state $Z_c(4000)$ in the reaction $B^{-}\to J/\psi {\rho }^0{K}^{-}$
• Production of hidden-heavy and double-heavy hadronic molecules at the $Z$ factory of CEPC
• Exotic candidates with heavy quark(s)
• On the possible virtual state nature of the LHCb Pc$(4312{)}^{+}$ signal
• A GPU based multidimensional amplitude analysis to search for tetraquark candidates
• $P_c(4312{)}^{+}$ and $P_c(4337{)}^{+}$ as interfering ${\Sigma }_c\bar{D}$ and ${\Lambda }_c{\bar{D}}^{\ast }$ threshold cusps
• The possible $K{\bar{K}}^{\ast }$ and $D{\bar{D}}^{\ast }$ bound and resonance states by solving Schrodinger equation
• Search for the $e^{+}{e}^{-}\to \varphi {\chi }_{c1}(3872)$ process at BESIII
• Dalitz-plot decomposition for the $e^{+}{e}^{-}\to J/\psi \pi \pi (K\bar{K})$ and $e^{+}{e}^{-}\to h_c\pi \pi$ processes
• Electromagnetic couplings of pentaquarks
• Threshold effects in heavy quarkonium spectroscopy
• Conference Summary of QNP2018
• Meson scattering and tetraquarks in two-dimensional QCD
• An analysis on doubly bottom molecular tetraquarks composed of $H_{(s)}$ and $T_{(s)}$ doublets
• Large-$N_c$ QCD and tetraquarks
• Electromagnetic probes revealing the inner structure of the ${\Lambda }_c(2940)$
• Investigating topped hadrons to probe the boundaries of the potential model
• Model-independent mass determination of near-threshold states from short-range production
• Predicting charmed-strange molecular tetraquarks with $K^{(\ast )}$ and $T$-doublet charmed or anticharmed meson
• Discovery of XYZ particles at the BESIII Experiment
• Observation and investigation of the $T_{c\bar{c}1}(4430{)}^{+}$ structure in $B^{+}\to \psi (2S)K_{\text{S}}^0{\pi }^{+}$ decays
• Unified study of $B_s^0\to X(3872){\pi }^{+}{\pi }^{-}(K^{+}{K}^{-})$ and $B_s^0\to \psi (2S){\pi }^{+}{\pi }^{-}(K^{+}{K}^{-})$ processes
• 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
• Structural dissection of hadronic molecules: The $D^{(\ast )}{\bar{K}}^{(\ast )}$ family under QCD light-cone sum rules
• Dispersive Analysis of $D$- and $B$-Meson Form Factors with Chiral and Heavy-Quark Constraints
• Role of $a_0(1710)$ in the $J/\psi \to {\rho }^{+}{\rho }^{-}\omega$ and $J/\psi \to \gamma {\rho }^0\omega$ reactions
• Analytic electromagnetic signatures of compact pentaquark structure: A multi-current QCD light-cone sum rules analysis of the $P_{\psi s}^{\Lambda }$ states
• Charting doubly strange hidden-charm pentaquarks: An electromagnetic mapping of spin-$\frac{1}{2}$ and $\frac{3}{2}$ states
• Insights into the exotic charged states $Z_b(10610)$ and $Z_b(10650)$ from their photoproduction off nuclei
• Resonance contributions from ${\chi }_{c0}$ in the charmless three-body hadronic $B$ meson decays
• Coupled-channel meson-meson scattering in the diabatic framework