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 $J^{ P}=\frac{ 1}{ 2}^{ -}(\frac{ 1}{ 2}^{ +}\otimes0^{ -})$ 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 $J^{ P}=\frac{ 1}{ 2}^{ -}(\frac{ 1}{ 2}^{ +}\otimes0^{ -})$ in $8_{ 2f}$ flavor representation are all zero.
Categories: hep-ph