Searching for the two poles of the $\Xi (1820)$ in the $\psi (3686)\to {\bar{\Xi }}^{+}{\bar{K}}^0{\Sigma }^{\ast -}({\pi }^{-}\Lambda )$ decay

Man-Yu Duan, Jing Song, Wei-Hong Liang +1

We propose the reaction $\psi (3686)\to {\bar{\Xi }}^{+}{\bar{K}}^0{\Sigma }^{\ast -}$, with the ${\Sigma }^{\ast -}$ decaying to ${\pi }^{-}\Lambda$ in order to show evidence for the existence of two $\Xi (1820)$ states, one aroun…