$\bar{D}^{(*)}_{s}D^{(*)}$ molecular state with $J^{P}=1^{+}$: the mass and magnetic moment

In this paper, we construct $\bar{D}^{(*)}_{s}D^{(*)}$-molecular-type interpolating current with $J^{P}=1^{+}$ and calculate the corresponding mass and magnetic moment using QCD sum rule method and its extension in the weak electromagnetic field. The numerical values are $m_{Z_{cs}}=4.00^{+0.05}_{-0.02}\mbox{GeV}$, $\lambda_{Z_{cs}}=2.22^{+0.2}_{-0.17}\times10^{-2}\mbox{GeV}^{5}$ and $\mu_{Z_{cs}}=(0.174\pm0.015)\mu_{N}$ with $\mu_{N}$ the nucleon magneton. The mass is in agreement with the recently measured value of $Z_{cs}(3895)$ by BESIII Collaboration, $m^{exp}_{Z_{cs}}=(3982.5^{+1.8}_{-2.6}\pm2.1)MeV$. As a result, it is reasonable to assign the new observed state $Z_{cs}(3895)$ to be a $\bar{D}^{(*)}_{s}D^{(*)}$ molecular state with $J^{P}=1^{+}$.