Exploring the extent of model dependence, we study effects of certain Ansätze for the T-dependence of the correction term in the QCD topological susceptibility. The one producing unwanted effects on results at \(T > 0\) in the \(\eta '\)-\(\eta \) complex in the usual limit of isospin symmetry, is largely cured from its peculiar behavior and brought into agreement with the other, when breaking of isospin symmetry is allowed and the realistic quark mass ratio \(m_u/m_d = 0.50\) is adopted.

中文翻译：

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$$ \ eta'$$η''– $$ \ eta $$η复合物的模型依赖性方面，其超出了同位旋极限

探索模型依赖性的程度，我们研究了某些Ansätze对QCD拓扑敏感性中校正项的T依赖性的影响。在同位旋对称性的通常限制下，对\（\ eta'\） - \（\ eta \）络合物中\（T> 0 \）处的结果产生有害影响的一种在很大程度上已从其独特的行为中得到治愈并被带入与之一致的是，当允许打破同位旋对称性时，采用现实的夸克质量比\（m_u / m_d = 0.50 \）。