Motivated by our earlier findings of sensitive quark-flavor dependence of QCD topological susceptibility on products of current quark masses and corresponding condensates, we allow the breaking of isospin symmetry. For the purpose of future investigations of U_A(1) symmetry breaking and restoration at T > 0, we perform (at T = 0) refitting of the quark-mass parameters of a phenomenologically successful effective model of low-energy QCD. It belongs to the class of separable-interaction models within the Dyson-Schwinger approach to the quark-antiquark substructure of mesons.

中文翻译：

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Dyson-Schwinger模型超出了等旋轴极限

基于我们先前对QCD拓扑敏感性对夸克风味的敏感度对当前夸克质量和相应冷凝物产物的敏感发现，我们允许打破同位旋对称性。对于将来的调查的目的ù_甲（1）对称性破坏和恢复在Ť > 0，我们执行（在Ť = 0）改装低能QCD的唯象成功有效模型的夸克质量参数。它属于介子的夸克-反夸克子结构的Dyson-Schwinger方法中的可分离交互模型的一类。