Observation of ${\eta }_c(2S)\to p\bar{p}$ and search for $X(3872)\to p\bar{p}$ decays

LHCb collaboration, R. Aaij, B. Adeva +750

The first observation of the decay ${\eta }_c(2S)\to p\bar{p}$ is reported using proton-proton collision data corresponding to an integrated luminosity of $3.0\mathrm{f}{\mathrm{b}}^{-1}$ recorded…