QCD analysis of the $P$-wave charmonium electromagnetic Dalitz decays $h_c\to {\eta }^{(\prime )}{\ell }^{+}{\ell }^{-}$

Chao-Jie Fan, Jun-Kang He

The $P$-wave charmonium electromagnetic Dalitz decays $h_c\to {\eta }^{(\prime )}{\ell }^{+}{\ell }^{-}$ $(\ell =e,\mu )$ with large recoil momentum are investigated in the framework of p…