Analysis of the 1/2± 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–axialvector-diquark–antiquark type pentaquark configurations in the diquark model, and study the masses and pole residues of the JP=1/2^± hidden-charm pentaquark states in detail with the QCD sum rules by extending our previous work on the JP=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.