Measurements of $J/\psi$ and $\psi (2S)$ decays into $\Lambda \bar{\Lambda }{\pi }^0$ and $\Lambda \bar{\Lambda }\eta$

BES Collaboration, M. Ablikim

Using 58 million $J/\psi$ and 14 million $\psi (2S)$ events collected by the BESII detector at the BEPC, branching fractions or upper limits for the decays $J/\psi$ and $\psi (2S)\to \Lambda \bar{\Lambda }{\pi }^0$…