Search for η_c(2S)\toωω and ωφ decays and measurements of χ_{cJ}\toωω and ωφ in ψ(2S) radiative processes

Using (2712\pm 14) \times 10^{6} \psi(2S) events collected with the BESIII detector at the BEPCII collider, we search for the decays \eta_{c}(2S)\to\omega\omega and \eta_{c}(2S)\to\omega\phi via the process \psi(2S)\to\gamma\eta_{c}(2S). Evidence of \eta_{c}(2S)\to\omega\omega is found with a statistical significance of 3.2\sigma. The branching fraction is measured to be \mathcal{B}(\eta_{c}(2S)\to\omega\omega)=(5.65\pm3.77(\rm stat.)\pm5.32(\rm syst.))\times10^{-4}. No... Show more