Resonances in heavy meson-heavy baryon coupled-channel interactions

The interactions of ${\overline{D}}^{(\ast )}$${\Lambda }_c$ - ${\overline{D}}^{(\ast )}$${\Sigma }_c^{(\ast )}$ are studied within the framework of a dynamical coupled-channel approach. A series of bound states and resonances with different spin and parity are dynamically generated in the hidden charm sector. Four S-wave bound states are found in the mass range of 4.3-4.5 GeV, close to the pentaquark states observed by LHCb. Two of the states have a spin parity of J${}^P$ = 1/2${}^{-}$ and the other two have J${}^P$ = 3/2${}^{-}$. In addition, several resonances with different spin and parity in higher partial waves are predicted.