Z_c(3900) - what is inside?

Abstract

The models for the internal structure of the newly found four-quark charmonium-like resonance $Z_c(3900)$ are discussed: the molecular model as well as the hadro-charmonium and tetraquark schemes. It is argued that it would be possible to resolve between these models by combining measurements of the quantum numbers of the resonance and of its decay rates into yet unseen channels $\pi {\psi }^{\prime }$, $\pi h_c$, $\rho {\eta }_c$ and into pairs of heavy mesons $D^{\ast }\bar{D}$ and $D{\bar{D}}^{\ast }$. The models also predict different related four-quark states, which can be sought for in the existing and future data.

9 pages

References in corpus (8)

• Observation of a charged charmoniumlike structure in e+e- to pi+pi-J/psi at \sqrt{s}=4.26 GeV
• Observation of a resonance-like structure in the pi^+- psi' mass distribution in exclusive B-->K pi^+- psi' decays
• Charmonium
• Decoding the riddle of Y(4260) and $Z_c(3900)$
• Hadro-Charmonium
• A J^PG=1++ Charged Resonance in the Y(4260) to pi+pi- J/psi Decay?
• Study of Three-Body Y(10860) Decays
• Holographic Hadro-Quarkonium

Cited by in corpus (92)

• Hadronic molecules
• The hidden-charm pentaquark and tetraquark states
• The $XYZ$ states: experimental and theoretical status and perspectives
• Multiquark Resonances
• Heavy-Quark QCD Exotica
• QCD and strongly coupled gauge theories: challenges and perspectives
• Observation of a charged charmoniumlike structure Z_c(4020) and search for the Z_c(3900) in e+e- to pi+pi-h_c
• Exotic Hadrons with Heavy Flavors -X, Y, Z and Related States-
• Observation of a charged (DD*bar)- mass peak in e+e- --> pi+ (DD*bar)- at Ecm=4.26 GeV
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Exotic hadrons: review and perspectives
• Analysis of the X(3872), Z_c(3900) and Z_c(3885) as axial-vector tetraquark states with QCD sum rules
• An overview of $XYZ$ new particles
• Possible assignments of the $X(3872)$, $Z_c(3900)$ and $Z_b(10610)$ as axial-vector molecular states
• A J^PG=1++ Charged Resonance in the Y(4260) to pi+pi- J/psi Decay?
• Observation of $Z_c(3900{)}^0$ in $e^{+}{e}^{-}\to {\pi }^0{\pi }^{0}J/\psi$
• Fate of the Tetraquark Candidate Zc(3900) from Lattice QCD
• Observation of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0{h}_c$ and a neutral charmoniumlike structure $Z_c(4020{)}^0$
• Prediction of an $I=1$ $D{\bar{D}}^{\ast }$ state and relationship to the claimed $Z_c(3900)$, $Z_c(3885)$
• How the Z_c(3900) Reveals the Spectra of Quarkonium Hybrid and Tetraquark Mesons
• Reproducing the $Z_c(3900)$ structure through the initial-single-pion-emission mechanism
• $Z_c^{+}(3900)$ decay width in QCD sum rules
• Exploring the threshold behavior and implications on the nature of Y(4260) and $Z_c(3900)$
• Determination of spin and parity of the $Z_c(3900)$
• $Z_c(3900)$: what has been really seen?
• Study of the $Z_c^{+}$ channel using lattice QCD
• Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners
• Strong decays of molecular states Zc(+) and Zc'(+)
• Improved QCD sum rule study of $Z_c(3900)$ as a $\bar{D}{D}^{\ast }$ molecular state
• Analysis of the $Z(4430)$ as the first radial excitation of the $Z_c(3900)$
• Charged Exotic Charmonium States
• Hidden-charm and bottom tetra- and pentaquarks with strangeness in the hadro-quarkonium and compact tetraquark models
• Interpreting $Z_c(3900)$ and $Z_c(4025)/Z_c(4020)$ as charged tetraquark states
• Hadronic molecules in B decays
• Search for Z_c^+(3900) in the 1^+- channel on the lattice
• Spectroscopy of the hidden-charm $[qc][\bar{q}\bar{c}]$ and $[sc][\bar{s}\bar{c}]$ tetraquarks
• Electromagnetic Structure of the Z_c(3900)
• Evidence for an ${\eta }_c(1S){\pi }^{-}$ resonance in $B^0\to {\eta }_c(1S)K^{+}{\pi }^{-}$ decays
• Is the X(3915) the chi_{c0}(2P)?
• $Z_c(4025)$ as the hadronic molecule with hidden charm
• Is $Z_c(3900)$ a molecular state
• The baryo-quarkonium picture for hidden-charm and bottom pentaquarks and LHCb $P_{\mathrm{c}}(4380)$ and $P_{\mathrm{c}}(4450)$ states
• Nonrelativistic model of tetraquarks and predictions for their masses from fits to charmed and bottom meson data
• The decay width of the $Z_c(3900)$ as an axialvector tetraquark state in solid quark-hadron duality
• Could $Z_c(3900)$ be a $I^G{J}^P=1^{+}{1}^{+}$ $D^{\ast }\bar{D}$ molecular state?
• Updated Cross Section Measurement of $e^{+}{e}^{-}\to K^{+}{K}^{-}J/\psi$ and $K_S^0{K}_S^{0}J/\psi$ via Initial State Radiation at Belle
• Compositeness of S-wave weakly-bound states from next-to-leading order Weinberg's relations
• Selected strong decay modes of Y(4260)
• 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
• Hidden-charmonium decays of $Z_c(3900)$ and $Z_c(4025)$ in intermediate meson loops model
• Establishing the heavy quark spin and light flavor molecular multiplets of the $X(3872)$, $Z_c(3900)$ and $X(3960)$
• The Tetraquark Candidate Zc(3900) from Dynamical Lattice QCD Simulations
• $Z_c(3900)$ as a $D{\bar{D}}^{\ast }$ molecule from the pole counting rule
• Charged charmoniumlike state $Z_c(3900{)}^{\pm }$ via meson photoproduction
• Axial meson exchange and the $Z_c(3900)$ and $Z_{cs}(3985)$ resonances as heavy hadron molecules
• Resonances in QCD
• $Z_c(3900)$: Confronting theory and lattice simulations
• Heavy quark spin selection rules in meson-antimeson states
• The hidden-charm strong decays of the $Z_c$ states
• Hidden-charm pentaquark states through the current algebra: From their productions to decays
• Decay behaviors of the fully-bottom and fully-charm tetraquark states
• Two-particle contributions and nonlocal effects in the QCD sum rules for the axialvector tetraquark candidate $Z_c(3900)$
• Decay properties of $P_c$ states through the Fierz rearrangement
• Probing the nature of $Y(4260)$ and $Z_c(3900)$ in the isospin violating process $Y(4260)\to J/\psi \eta {\pi }^0$
• ${\eta }_{\mathrm{c}}$- and $J/\psi$-isoscalar meson bound states in the hadro-charmonium picture
• Fully charmed tetraquarks from LHC to FCC: Natural stability from fragmentation
• Exotic tetraquarks at the HL-LHC with JETHAD: A high-energy viewpoint
• Search for a strangeonium-like structure $Z_s$ decaying into $\varphi \pi$ and a measurement of the cross section $e^{+}{e}^{-}\to \varphi \pi \pi$
• Bottomoniumlike states in proton collisions: Fragmentation and resummation
• Evidence for $Z_c^{\pm }$ decays into the ${\rho }^{\pm }{\eta }_c$ final state
• Radiative and $\rho$ transitions between heavy quarkonium and isovector four-quark states
• Fragmentation functions for axial-vector heavy tetraquarks: A TQ4Q1.1 update
• Understanding the ${\eta }_c\rho$ decay mode of $Z_c^{(\prime )}$ via the triangle loop mechanism
• The history of LHCb
• Fragmentation of fully heavy tetraquarks: The TQ4Q1.1 functions as a case study
• Decay properties of the $Z_c(3900)$ through the Fierz rearrangement
• Decay properties of the $X(3872)$ through the Fierz rearrangement
• Universal non-resonant explanation to charmoniumlike structures $Z_c(3885)$ and $Z_c(4025)$
• 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
• Study on decays of $Z_c(4020)$ and $Z_c(3900)$ into $h_c+\pi$
• Role of the short-range dynamics in the formation of $D^{(\ast )}{\bar{D}}^{(\ast )}/B^{(\ast )}{\bar{B}}^{(\ast )}$ hadronic molecules
• Isospin analysis of $B\to D^{\ast }\bar{D}K$ and the absence of the $Z_c(3900)$ in $B$ decays
• Tetraquark-Jet Systems at the High-Luminosity LHC
• The possible $B\pi$ molecular state and its radiative decay
• Multimodal Fragmentation of All-Heavy Pentaquarks: Uncertainty-Aware Predictions for Hadron Colliders
• Theory Concepts for Heavy Exotic Mesons
• Threshold Effects in Heavy Quarkonium Spectroscopy and Decays
• Partial Wave Analysis of $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}J/\psi$ and Cross Section Measurement of $e^{+}{e}^{-}\to {\pi }^{\pm }{Z}_c(3900{)}^{\mp }$ from 4.1271 to 4.3583 GeV
• Observation of the first iso-spin Charmonium-like State $Z_c(4020)$ }
• Threshold effects in heavy quarkonium spectroscopy
• Heavy-flavor multimodal fragmentation to $S$-wave pentacharms at next-generation hadron colliders
• Exotic Quarkonium Spectroscopy: X(3872), Z_b(10610), and Z_b(10650) in Non-Relativistic Effective Theory