Analysis of the 1/2± pentaquark states in the diquark model with QCD sum rules

In this article, we present the scalar-diquark-scalar-diquark-antiquark type and scalar-diquark-axial-vector-diquark-antiquark type pentaquark configurations in the diquark model, and study the masses and pole residues of the J(P) = 1/2(+/-) hidden-charm pentaquark states in detail with the QCD sum rules by extending our previous work on the J(P) = 3/2(-) and 5/2(+) hidden-charm pentaquark states. We calculate the contributions of the vacuum condensates up to dimension-10 in the operator product expansion by constructing both the scalar-diquark-scalar-diquark-antiquark type and the scalar-diquark-axialvector-diquark-antiquark type interpolating currents. The present predictions of the masses can be confronted to the LHCb experimental data in the future.