Employing spin symmetry to disentangle different models for the XYZ states

Abstract

In order to test different models proposed for some states discovered recently in the charmonium mass range that do not fit into the pattern predicted by the conventional quark model, we derive predictions for the spectrum within the hadro-charmonium picture, the tetraquark picture as well as the hadronic molecular approach. We exploit heavy quark spin symmetry for the hadro-charmonium and hadronic molecule scenarios. The patterns that emerge from the different models turn out to be quite distinct. For example, only within the hadro-charmonium picture a pseudoscalar state emerges that is lighter than the Y(4260). Possible discovery channels of these additional states are discussed.

22 pages, 4 figures, version accepted by PRD

References in corpus (34)

• Heavy quarkonium: progress, puzzles, and opportunities
• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Charmonium
• Observation of the resonant character of the $Z(4430{)}^{-}$ state
• Observation of Two Resonant Structures in e+e- to pi+ pi- psi(2S) via Initial State Radiation at Belle
• The Z(4430) and a New Paradigm for Spin Interactions in Tetraquarks
• Hadro-Charmonium
• Four-Quark Hadrons: an Updated Review
• X(3872) and Other Possible Heavy Molecular States
• Pion Interactions in the X(3872)
• The Heavy Quark Spin Symmetry Partners of the X(3872)
• Are Y(4260) and {\rm Z${}_2^{+}$(4250)} ${\mathrm{D}}_1\mathrm{D}$ or ${\mathrm{D}}_0{\mathrm{D}}^{\ast }$ Hadronic Molecules?
• Is X(3872) a molecule?
• Effect of charmed meson loops on charmonium transitions
• Could the near-threshold $XYZ$ states be simply kinematic effects?
• Evidence that the Y(4660) is a f_0(980)psi' bound state
• Hadronic Decays of the X(3872) to chi_{cJ} in Effective Field Theory
• Implications of heavy quark spin symmetry on heavy meson hadronic molecules
• Possible S-wave Bound-States of Two Pseudoscalar Mesons
• $Z^{+}(4430)$ as a $D_1^{\prime }{D}^{\ast }$ ($D_1{D}^{\ast }$) molecular state
• Remarks on pole trajectories for resonances
• Chromomagnetism, flavour symmetry breaking and S-wave tetraquarks
• The Spin-orbit force, recoil corrections and possible $B{\bar{B}}^{\ast }$ and $D{\bar{D}}^{\ast }$ molecular states
• More kaonic bound states and a comprehensive interpretation of the D_{sJ} states
• Remarks on the study of the X(3872) from Effective Field Theory with Pion-Exchange Interaction
• Hidden-Charm Tetraquarks and Charged Zc States
• Galilean-Invariant XEFT
• The bound state problem of S-wave heavy quark meson-aitimeson systems
• Strong decays of the $XYZ$ states
• ${\mathrm{Z}}^{+}(4430)$ and Analogous Heavy Flavor States
• Holographic Hadro-Quarkonium
• Chromo-polarizability and pipi final state interaction
• Power counting for three-body decays of a near-threshold state
• Search for $J^{PC}=1^{-+}$ exotic state in $e^{+}{e}^{-}$ annihilation

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• The Dynamical Diquark Model: First Numerical Results
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• Hidden charm tetraquark states in a diquark model
• Spectroscopy of Exotic Hadrons Formed from Dynamical Diquarks
• Four-quark states with charm quarks in a two-body Bethe-Salpeter approach
• The Spectrum of $P$-Wave Hidden-Charm Exotic Mesons in the Diquark Model
• Prediction of a narrow exotic hadronic state with quantum numbers $J^{PC}=0^{--}$
• Is $Z_{cs}(3982)$ a molecular partner of $Z_c(3900)$ and $Z_c(4020)$ states?
• Hidden-flavour four-quark states in the charm and bottom region
• Exotic tetraquarks at the HL-LHC with JETHAD: A high-energy viewpoint
• The possibility of $X(4014)$ as a $D^{\ast }{\bar{D}}^{\ast }$ molecular state
• Mass-Spectroscopy of hidden charm and hidden strange tetraquarks in diquark-antidiquark approach
• Entanglement suppression and low-energy scattering of heavy mesons
• Substructure of Multiquark Hadrons (Snowmass 2021 White Paper)
• Production of $1^{-+}$ exotic charmonium-like states in electron-positron collisions
• Pole trajectories from $S$- and $P$-wave $D{\bar{D}}^{\ast }$ interactions
• Production cross sections of tetraquark states in elementary hadronic collisions
• 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
• Hadronic molecules and multiquark states
• An analysis on doubly bottom molecular tetraquarks composed of $H_{(s)}$ and $T_{(s)}$ doublets