The open-charm Euclidean correlators have been computed for the first time using the thermal spectral functions extracted from a finite-temperature self-consistent unitarized approach based on a chiral effective field theory that implements heavy-quark spin symmetry. The inclusion of the full-energy dependent open-charm spectral functions in the calculation of the Euclidean correlators leads to a similar behaviour as the one obtained in lattice QCD for temperatures well below the transition deconfinement temperature. The discrepancies at temperatures close or above the transition deconfinement temperature could indicate that higher-energy states, that are not present in the open-charm spectral functions, become relevant for a quantitative description of the lattice QCD correlators at those temperatures. In fact, we find that the inclusion of a continuum of scattering states improves the comparison at small Euclidean times, whereas differences still arise for large times.

使用基于实现重夸克自旋对称性的手性有效场理论的有限温度自洽单元化方法提取的热谱函数，首次计算了欧几里德相关系数。在欧几里德相关器的计算中包括与全能量有关的开谱谱函数，这导致了与在晶格QCD中获得的，远低于过渡脱限温度的温度相似的行为。在接近或超过过渡脱限温度的温度下的差异可能表明，开放式谱函数中不存在的高能态与这些温度下晶格QCD相关器的定量描述相关。事实上，