An Interesting Charmonium State Formation and Decay : $p\bar{p}{\to }^1{D}_2{\to }^1{P}_1\gamma$

M. Anselmino, F. Caruso, F. Murgia +1

Massless perturbative QCD forbids, at leading order, the exclusive annihilation of proton-antiproton into some charmonium states, which, however, have been observed in the $p\bar p…