Analysis of the ${\overline{\Xi }}_{cc}{\Xi }_{cc}$ hexaquark molecular state with the QCD sum rules

Abstract

In this work, we construct the color-singlet-color-singlet type six-quark pseudoscalar current to investigate the ${\overline{\Xi }}_{cc}{\Xi }_{cc}$ hexaquark molecular state with the QCD sum rules, the predicted mass $M_X\sim 7.2\mathrm{GeV}$ supports assigning the $X(7200)$ to be the ${\overline{\Xi }}_{cc}{\Xi }_{cc}$ hexaquark molecular state with the quantum numbers $J^{PC}=0^{-+}$. The $X(7200)$ can decay through fusions of the $\bar{c}c$ and $\bar{q}q$ pairs, we can search for the $X(7200)$ and explore its properties in the $J/\psi J/\psi$, ${\chi }_{c1}{\chi }_{c1}$, $D^{\ast }{\bar{D}}^{\ast }$ and $D_1{\bar{D}}_1$ invariant mass spectrum in the future.

Comments: 8 pages, 5 figures