Search for η_{c}(2S)\to K^+ K^- η^{\prime} decay

Using (2.712\pm0.014)\times10^{9} \psi(3686) events collected with the BESIII detector operating at the BEPCII, we find an evidence of the \eta_{c}(2S)\to K^+ K^- \eta^{\prime} decay with a statistical significance of 3.1\sigma. Its decay branching fraction is measured to be (12.24\pm4.60(\mathrm{stat.})\pm2.37(\mathrm{syst.})\pm4.68(\mathrm{extr.}))\times 10^{-4}, where the first uncertainty is statistical, the second is systematic,... Show more