Search for η_c(2S)\to p\bar{p} and branching fraction measurements of χ_{cJ} \to p\bar{p} via ψ(2S) radiative decays

Using (27.12\pm0.14) \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 \psi(2S)\to \gamma\eta_c(2S), and only find a signal with a significance of 1.7\,\sigma. The upper limit of the product branching fraction at the 90% confidence level is... Show more