Charmonium radiative transitions to dileptons from lattice QCD: The case of $h_c\to {\eta }_c{\ell }^{+}{\ell }^{-}$ and ${\chi }_{c1}\to J/\psi {\ell }^{+}{\ell }^{-}$

D. Bečirević, R. Di Palma, R. Frezzotti +4

We present a lattice QCD study of dilepton production in charmonium transitions, specifically focusing on the $1^{+-}\to 0^{-+}$ and $1^{++}\to 1^{--}$ processes: $h_c \to η_c \e…