Magnetic moments of the hidden-charm pentaquark states

TL;DR

This paper calculates the magnetic moments of hidden-charm pentaquark states across different models to help determine their internal structures, providing a way to distinguish between theoretical configurations.

Contribution

It offers the first comparative calculation of magnetic moments for hidden-charm pentaquarks in multiple models, highlighting their potential to identify internal structures.

Findings

Magnetic moments vary across models due to different internal structures.

Calculations cover states with J^P=1/2, 3/2, 5/2, 7/2.

Results can help distinguish between molecular, diquark-triquark, and diquark-diquark-antiquark models.

Abstract

The magnetic moment of a baryon state is an equally important dynamical observable as its mass, which encodes crucial information of its underlying structure. According to the different color-flavor structure, we have calculated the magnetic moments of the hidden-charm pentaquark states with $J^P={\frac{1}{2}}^{\pm}$, ${\frac{3}{2}}^{\pm}$, ${\frac{5}{2}}^{\pm}$ and ${\frac{7}{2}}^{+}$ in the molecular model, the diquark-triquark model and the diquark-diquark-antiquark model respectively. Although a good description for the pentaquark mass spectrum and decay patterns has been obtained in all the three models, different color-flavor structures lead to different magnetic moments, which can be used to pin down their inner structures and distinguish various models.