Disentangling isospin violation in charmonia decaying into $\Xi \overline{\Xi }$ pairs

Huan-Ran Wen, Chun-Qiu Zhao, Xu Cao +1

Based on a model-independent isospin decomposition, we perform a data-driven analysis of $J/\psi$ and $\psi (2S)$ decays into $\Xi \bar{\Xi }$ pairs by leveraging the full set of observables from…