Resonance $Y(4660)$ as a vector tetraquark and its strong decay channels

Abstract

The spectroscopic parameters and partial widths of the strong decay channels of the vector meson $Y(4660)$ are calculated by treating it as a bound state of a diquark and antidiquark. The mass and coupling of the $J^{PC}=1^{--}$ tetraquark $Y(4660)$ are evaluated in the context of the two-point sum rule method by taking into account the quark, gluon and mixed condensates up to dimension 10. The widths of the $Y(4660)$ resonance's strong $S$-wave decays to $J/\psi f_0(980)$ and $\psi (2S)f_0(980)$ as well as to $J/\psi f_0(500)$ and $\psi (2S)f_0(500)$ final states are computed. To this end, strong couplings in the relevant vertices are extracted from the QCD sum rule on the light cone supplemented by the technical methods of the soft approximation. The obtained result for the mass of the resonance $m_Y=4677_{-63}^{+71}\mathrm{MeV}$ and the prediction for its total width ${\Gamma }_Y=(64.8\pm 10.8)\mathrm{MeV}$ is in nice agreement with the experimental information.

10 Pages and 2 Figures

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Cited by in corpus (21)

• QCD Sum Rules Approach to the $X,Y$ and $Z$ States
• Deciphering the recently discovered tetraquark candidates around 6.9 GeV
• Strong decays of the $Y(4660)$ as a vector tetraquark state in solid quark-hadron duality
• New charged resonance $Z_c^{-}(4100)$: the spectroscopic parameters and width
• Lowest vector tetraquark states: $Y(4260/4220)$ or $Z_c(4100)$
• Are the $Y$ states around 4.6 GeV from $e^{+}{e}^{-}$ annihilation higher charmonia?
• Light axial-vector and vector resonances $X(2100)$ and $X(2239)$
• Resonance $X(3960)$ as a hidden charm-strange scalar tetraquark
• Resonance $X(4630)$
• Analysis of the vector hidden-charm-hidden-strange tetraquark states with implicit P-waves
• Magnetic moments of the vector hidden-charmed tetraquark states
• Analysis of the decay $Y(4500)\to D^{\ast }{\bar{D}}^{\ast }\pi$ with the light-cone QCD sum rules
• Scalar or vector tetraquark state candidate: $Z_c(4100)$
• $Y(4626)$ as a $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state
• Study of the $Y(4660)$ from a light-quark perspective
• Light meson emissions of the selected charmonium-like states within compact tetraquark configurations
• Charmonium decays into ${\Lambda }_c{\bar{\Lambda }}_c$ pair governed by the hadronic loop mechanism
• Near-threshold structures in the $D_s^{+}{D}_s^{-}$ mass distribution of the decay $B^{+}\to D_s^{+}{D}_s^{-}{K}^{+}$
• Two-body strong decays of the pseudoscalar hidden-charm tetraquark states via the QCD sum rules
• Analysis of the vector hidden-charm tetraquark states without explicit P-waves via the QCD sum rules
• Search for $e^{+}{e}^{-}\to \varphi {\chi }_{c0}$ and $\varphi {\eta }_{c2}(1D)$ at center-of-mass energies from 4.47 to 4.95 GeV