LAUSR

Recently, Belle Collaboration reported a new exotic state $Y(4620)$ with mass at 4625.9 MeV in the positronium annihilation process. Inspired by experiment, we study the tetraquark system $c\bar{s}s\bar{c}$ with quantum numbers $J^{P}=1^{-}$ in the framework of chiral constituent quark model with the help of Gaussian expansion method. Two structures, diquark-antidiquark and meson-meson, with all possible color and spin configurations are considered. The result shows that a resonance state of $D_{s}^{*}D_{s1}(2536)$ can be formed, its mass is close to the experimental value of $Y(4620)$. It is possible a good candidate of the newly found state $Y(4620)$.