Analysis of the\({\frac{1}{2}}^{\pm }\)pentaquark states in the diquark model with QCD sum rules

Author:

Wang, Zhi-Gang   Huang, Tao   

Journal:

The European Physical Journal C

Issue Date:

2016

Abstract(summary):

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) =3D 1/2(+/-) hidden-charm pentaquark states in detail with the QCD sum rules by extending our previous work on the J(P) =3D 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.