\begin{document}$ D^*\bar{D}^* $\end{document} molecular states with \begin{document}$ J^{PC}=0^{++} $\end{document}, \begin{document}$ 1^{+-} $\end{document}, and \begin{document}$ 2^{++} $\end{document}to investigate their two-body strong decays via the QCD sum rules based on rigorous quark-hadron duality. We obtain the partial decay widths and, therefore, the total widths of the ground states with \begin{document}$ J^{PC}=0^{++} $\end{document}, \begin{document}$ 1^{+-} $\end{document}, and \begin{document}$ 2^{++} $\end{document}, which indicate that it is reasonable to assign \begin{document}$ X_2(4014) $\end{document} as the \begin{document}$ D^*\bar{D}^* $\end{document} tetraquark molecular states with \begin{document}$ J^{PC}=2^{++} $\end{document}."> Two-body strong decays of the hidden-charm tetraquark molecular states via QCD sum rules -
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