Pinpointing Physical Solutions in Y(4230) Decays

To resolve ambiguities from multiple solutions in experimental measurements, we construct a $χ^2$ function incorporating constraints such as isospin conservation and amplitude relations. By minimizing the global $χ^2$, we identify physical solutions for seven hidden-charm decay channels of $Y(4230)$, revealing a small strange quark component. Crucially, the physical solution for $Y(4230) \to π^{+}π^{-} J/ψ$ corresponds to the smallest among four experimental solutions, potentially significantly modifying inputs for theoretical calculations. Additionally, we predict $Γ_{ee}{\mathcal B}(Y(4230) \to π^+π^- ψ')$ based on our results, acknowledging substantial uncertainties in current measurements.