On the Nature of X(4260)

Abstract

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

Comments: Refined analysis with new experimental data included. 13 pages