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There are different assumptions on the substructure of the pentaquarks$P_c(4380)$ and $P_c(4450)$, newly founded in $J/\psi N $ invariant mass by theLHCb collaboration, giving consistent mass results with the experimentalobservations. The experimental data and recent theoretical studies on theirmass suggest interpretation of these states as spin-3/2 negative-parity andspin-5/2 positive-parity pentaquarks, respectively. There may existopposite-parity states corresponding to these particles, as well. Despite a lotof studies, however, the nature and internal organization of these pentaquarksin terms of quarks and gluons are not clear. To this end we need moretheoretical investigations on other physical properties of these states. Inthis accordance, we study a strong and dominant decay of the $P_c(4380)$ to$J/\psi$ and $N$ in the framework of three point QCD sum rule method. Aninterpolating current in a molecular form is applied to calculate six strongcoupling form factors defining the transitions of the positive and negativeparity spin-3/2 pentaquark states. The values of the coupling constants areused in the calculation of the decay widths of these transitions. The obtainedresults are compared with the existing experimental data.

Strong Decay of $P_c(4380)$ Pentaquark in a Molecular Picture