Radiative transitions in charmonium from $N_f=2$ twisted mass lattice QCD

Ying Chen, De-Chuan Du, Bao-Zhong Guo +8

We present a study for charmonium radiative transitions: $J/\psi \to {\eta }_c\gamma$, ${\chi }_{c0}\to J/\Psi \gamma$ and $h_c\to {\eta }_c\gamma$ using $N_f=2$ twisted mass lattice QCD gauge config…