An overview of ${\eta }_c(1S)$, ${\eta }_c(2S)$ and $h_c(1P)$ physics at BESIII

Qingping Ji, Shuangshi Fang, Zhiyong Wang

With the help of the largest data samples of $J/\psi$ and $\psi (2S)$ events ever produced in $e^{+}{e}^{-}$ annihilations, the three singlet charmonium states, ${\eta }_c(1S)$, ${\eta }_c(2S)$ and $h_c(1P…