Study of the XYZ states at the BESIII

Abstract

With its unique data samples at energies of 3.8--4.6 GeV, the BESIII experiment made a significant contribution to the study of charmonium and charmonium-like states, i.e., the XYZ states. We review the results for observations of the Zc(3900) and Zc(4020) states, the X(3872) in e+e- annihilation, and charmonium psi(1^3D_2) state, as well as measurements of the cross-sections of omega chi_cJ and eta J/psi, and the search for e+e- to gamma chi_cJ and gamma Y(4140). We also present data from BESIII that may further strengthen the study of the XYZ and conventional charmonium states, and discuss perspectives on future experiments.

Talk at the "International Workshop on Physics at Future High Intensity Collider @ 2--7 GeV in China," January 13--16, 2015, University of Science and Technology of China (USTC), Hefei, China

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• Heavy quarkonium: progress, puzzles, and opportunities
• The Physics of the B Factories
• Higher Charmonia and X,Y,Z states with Screened Potential
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• Hadronic molecule structure of the Y(3940) and Y(4140)
• Study of $e^{+}{e}^{-}\to \omega {\chi }_{cJ}$ at center-of-mass energies from 4.21 to 4.42 GeV
• Observation of $e^{+}{e}^{-}\to {\pi }^0{\pi }^0{h}_c$ and a neutral charmoniumlike structure $Z_c(4020{)}^0$
• Heavy quarkonium hybrids from Coulomb gauge QCD
• Observation of the $\psi (1^3{D}_2)$ state in $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\gamma {\chi }_{c1}$ at BESIII
• 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
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• Observation of $e^{+}{e}^{-}\to \eta J/\psi$ at center-of-mass energy $sqrts=4.009$ GeV
• Strong decays of the $XYZ$ states
• Charmonium in lattice QCD and the non-relativistic quark-model
• Search for the $Y(4140)$ via $e^{+}{e}^{-}\to \gamma \varphi J/\psi$ at $\sqrt{s}=$ 4.23, 4.26 and 4.36 GeV
• Evidence for $e^{+}{e}^{-}\to \gamma {\chi }_{c1,2}$ at center-of-mass energies from 4.009 to 4.360 GeV

Cited by in corpus (12)

• The XYZ states revisited
• Triply-heavy baryons in a constituent quark model
• $Z_c(3900)$ as a $D{\bar{D}}^{\ast }$ molecule from the pole counting rule
• Charmonium and Charmoniumlike States at the BESIII Experiment
• Spectroscopic survey of higher-lying states of $B_c$ meson family
• Using $X(3823)\to J/\psi {\pi }^{+}{\pi }^{-}$ to identify coupled-channel effects
• Pair structure of heavy tetraquark systems
• Searching for charmoniumlike states with hidden $s\bar{s}$
• Charmonium spectrum with a Dirac potential model in the momentum space
• Instanton effects on charmonium states
• Exotic polyquark states and their properties in QCD
• 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