The axial charges of the hidden-charm pentaquark states

TL;DR

This paper calculates the axial charges of hidden-charm pentaquark states using the chiral quark model, revealing how different configurations influence their properties and providing insights into their internal structures.

Contribution

It provides the first detailed calculation of axial charges for various hidden-charm pentaquark states, highlighting their dependence on internal configurations.

Findings

Different configurations lead to significantly different axial charges.

Some pentaquark states have axial charges much smaller than the proton.

Axial charges encode important structural information about pentaquark states.

Abstract

With the chiral quark model, we have calculated the axial charges of the pentaquark states with $(I,I_3)=(\frac{1}{2},\frac{1}{2})$ and $J^{P}=\frac{1}{2}^{\pm},\frac{3}{2}^{\pm},\frac{5}{2}^{\pm}$. The $P_c$ states with the same $J^P$ quantum numbers but different color-spin-flavor configurations have very different axial charges, which encode important information on their underlying structures. For some of the $J^{P}=\frac{3}{2}^{\pm}$ or $\frac{5}{2}^{\pm}$ pentaquark states, their axial charges are much smaller than that of the proton.