AI 中文总结
本研究基于模型无关的同位旋分解，利用BESIII高统计数据开展数据驱动分析，厘清了粲偶素衰变到$Ξ\barΞ$对过程中同位旋破坏的电、磁耦合贡献及分波特征。
AI 中文摘要
基于不依赖模型的同位旋分解方法，我们利用高统计量BESIII数据的全部可观测量，对$J/ψ$和$ψ(2S)$衰变到$Ξ\barΞ$对的过程开展了数据驱动分析。我们发现同位旋破坏振幅主要由电耦合主导，其大小约为10%，而磁贡献更小，约为3%。分波分析进一步表明，$S$波的同位旋破坏程度与$D$波贡献相当。
英文摘要
Based on a model-independent isospin decomposition, we perform a data-driven analysis of $J/ψ$ and $ψ(2S)$ decays into $Ξ\barΞ$ pairs by leveraging the full set of observables from high-statistics BESIII data. We find that the isospin-violating amplitudes are predominantly driven by the electric couplings, with magnitudes reaching approximately 10%, contrasting with the smaller magnetic contributions of about 3%. A partial-wave analysis further reveals that $S$-wave isospin violation is comparable to the $D$-wave contribution.
