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arXiv · 2511.09098

Analysis of the strong decays of the $Y(4660)$ in tetraquark scenario via the QCD sum rules

Xiao-Song Yang·Zhi-Gang Wang
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Abstract

Motivated by the enigmatic vector charmonium-like states, we investigate the strong decay behaviors of four kinds of vector tetraquark states, which are possible candidates for the $Y(4660)$, within the framework of three-point QCD sum rules based on rigorous quark-hadron duality. We take into account the vacuum condensates up to dimension 5 on the QCD side, and obtain the hadronic coupling constants therefore the partial decay widths of those states. The predicted total width $61.5\pm7.3\,\rm{MeV}$ is in excellent agreement with the experimental data for the $Y(4660)$, which supports its interpretation as a $[sc][\bar{s}\bar{c}]$ tetraquark state with the $J^{PC}=1^{--}$.

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Xiao-Song Yang, Zhi-Gang Wang. 2025-11-12. Analysis of the strong decays of the $Y(4660)$ in tetraquark scenario via the QCD sum rules. https://doi.org/10.1088/1674-1137/ae71a6

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