; Zhang, Zong-Ye] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
; [Zhang, Zong-Ye] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
The bound state problem of D-0(D) over bar*(0)((D) over bar D-0*(0)) is relevant to the molecular interpretation of the X(3872). We investigated this problem in a chiral quark model by solving the resonating group method equation. We found the system is unbound through S-wave pi and sigma interactions. The inclusion of rho and omega meson exchanges is helpful to the formation of a molecule. Because the binding energy relies on the coupling constants, we cannot draw a definite conclusion as to whether a molecular state exists in the D-0(D) over bar*(0)((D) over bar D-0*(0)) system. When moving on to the bottom counterpart, we obtained an S-wave B (B) over bar* state.