Study the Heavy Molecular States in Quark Model with Meson Exchange   Interaction
  Some charmonium-like resonances such as X(3872) can be interpreted as possible $D^{(*)}D^{(*)}$ molecular states. Within the quark model, we study the structure of such molecular states and the similar $B^{(*)}B^{(*)}$ molecular states by taking into account of the light meson exchange ($\pi$, $\eta$, $\rho$, $\omega$ and $\sigma$) between two light quarks from different mesons. 
Si-Hai Yu, Bao-Kai Wang, Wei-Zhen Deng and Xiao-Lin Chen
hep-ph