Strong decays of the P_c(4312) and its isospin cousin via the QCD sum rules

In the present work, considering the conservation of isospin in the strong decays, we investigate the strong decays of the pentaquark molecule candidate P_c(4312) and its possible higher isospin cousin P_c(4330) in the framework of the QCD sum rules. What's more, the pole residue of the Δ baryon with isospin eigenstate |II_3⟩=|3/21/2⟩ is obtained. If the possible pentaquark molecule candidate P_c(4330) could be testified in the future experiment, it would shed light on interpretations of the P_c states.