论文标题
在有限温度下的D梅森质量和重夸克电势
D meson mass and heavy quark potential at finite temperature
论文作者
论文摘要
基于这样的观察，即无穷大的重夸克 - 易夸克电势值对应于D Meson质量的两倍，我们通过在有限温度下的D Meson的QCD总规则计算来限制重夸克电势的渐近值。我们发现，要正确复制QCD总规则结果，以及在临界温度附近的D Meson质量的最新模型计算，重夸克电势应主要由自由能组成，并增加了内部能量的小但非平凡的部分。结合先前的研究，将$ J/ψ$与QCD总规则计算的潜在模型结果进行了比较，我们得出结论，有效的重夸克电势的组成应取决于Quark Inter-Quark距离。也就是说，电势在短距离处主导，而在较大的分离下，它的内部能量约为20％。
Based on the observation that the heavy quark-antiquark potential value at infinity corresponds to twice the D meson mass, we constrain the asymptotic value of the heavy quark potential in a hot medium through a QCD sum rule calculation of the D meson at finite temperature. We find that to correctly reproduce the QCD sum rule results as well as a recent model calculation for the D meson mass near the critical temperature, the heavy quark potential should be composed mostly of the free energy with an addition of a small but nontrivial fraction of the internal energy. Combined with a previous study comparing potential model results for the $J/ψ$ to a QCD sum rule calculation, we conclude that the composition of the effective heavy quark potential should depend on the inter-quark distance. Namely, the potential is dominated by the free energy at short distance, while at larger separation, it has a fraction of about 20% of internal energy.
