Search for ${\eta }_c(2S)\to p\bar{p}$ and branching fraction measurements of ${\chi }_{cJ}\to p\bar{p}$ via $\psi (2S)$ radiative decays

BESIII Collaboration, M. Ablikim, M. N. Achasov +648

Using $(27.12\pm 0.14)\times 10^8$ $\psi (2S)$ events collected by the BESIII detector operating at BEPCII, we search for the decay ${\eta }_c(2S)\to p\bar{p}$ via the process $ψ(2S)\to γη…