Partial wave analysis of $J/\psi \to \gamma \eta {\eta }^{\prime }$

M. Ablikim, M. N. Achasov, P. Adlarson +523

Based on a sample of (10.09$\pm$0.04)$\times$10${}^9$ $J/\psi$ events collected with the BESIII detector operating at the BEPCII storage ring, a partial wave analysis of the decay $J/…