Production of hidden-charm molecular candidates in $\psi (4660)$ decays

Xiao-Yun Wang, Ya-Rong Wang, Shi-Dong Liu +2

We investigate the production of several hidden-charm exotic candidates, including $Z_c(3900)$, $Z_c(4020)$, $Z_{cs}(3985)$, and $Z_2(4250)$, in $\psi (4660)$ decays under the assumpti…