In this work, we calculate the magnetic moment and axial charge of the octet hidden-charm molecular pentaquark family in quark model. The Coleman-Glashow sum rule for the magnetic moments of pentaquark family is always fulfilled independently of $SU(3)$ symmetry breaking. In the $8_{2f}$ flavor representation, the magnetic moments of hidden-charm molecular pentaquark states with spin configuration $J^P={\frac{1}{2}}^{-}({\frac{1}{2}}^{+}\otimes 0^{-})$ are all equal to ${\mu }_c=0.38{\mu }_N$. The axial charges of octet hidden-charm molecular pentaquark states are quite small compared to the axial charge of nucleon. The axial charges of the pentaquark states with the spin configuration $J^P={\frac{1}{2}}^{-}({\frac{1}{2}}^{+}\otimes 0^{-})$ in $8_{2f}$ flavor representation are all zero.

• Received 29 January 2024
• Accepted 29 April 2024

DOI:https://doi.org/10.1103/PhysRevD.109.094027

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Published by the American Physical Society