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

Understand

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.