Analysis of the $\frac{3}{2}^{\pm}$ pentaquark states in the diquark model with QCD sum rules

TL;DR

This paper uses QCD sum rules to analyze the masses and properties of specific hidden-charm pentaquark states with strangeness, constructing appropriate currents and calculating their spectral densities.

Contribution

It introduces a method to study $J^{P}=rac{3}{2}^{\pm}$ pentaquark states using diquark models and QCD sum rules, providing mass predictions for future experimental comparison.

Findings

Mass predictions for hidden-charm pentaquark states with S=-1 and S=-2.

A new approach to determine energy scales in QCD sum rule calculations.

Construction of specific interpolating currents for these pentaquark states.

Abstract

In this article, we construct the scalar-diquark-axialvector-diquark-antiquark type interpolating currents, and study the masses and pole residues of the $J^{P}=\frac{3}{2}^{\pm}$ hidden-charmed pentaquark states with the QCD sum rules. In calculations, we use the formula $\mu=\sqrt{M^2_{P}-(2{\mathbb{M}}_c)^2}$ to determine the energy scales of the QCD spectral densities. We obtain the masses of the hidden-charm pentaquark states with the strangeness $S=-1$ and $S=-2$, which can be confronted to the experimental data in the future.