On the Nature of X(4260)

We study the property of $X(4260)$ resonance by re-analyzing all experimental data available, especially the $e^+e^- \rightarrow J/ψ\,π^+π^-,\,\,\,ωχ_{c0}$ cross section data. The final state interactions of the $ππ$, $K\bar K$ couple channel system are also taken into account. A sizable coupling between the $X(4260)$ and $ωχ_{c0}$ is found. The inclusion of the $ωχ_{c0}$ data indicates a small value of $Γ_{e^+e^-}=23.30\pm 3.55$eV.

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