论文标题
Quarkonia的热修饰和重型夸克扩散，从连续性脱二个晶格的比较与扰动QCD的比较。
Thermal modifications of quarkonia and heavy quark diffusion from a comparison of continuum-extrapolated lattice results to perturbative QCD
论文作者
论文摘要
我们通过将欧几里得相关因子从晶格与扰动光谱函数进行比较，研究了矢量通道中重夸克尼亚的中等内部修饰和重夸克扩散系数。在晶格方面，我们在五个温度下（0.75、1.1、1.3、1.5、1.5、1.5和2.25 $ t_c $）中，在四个不同的大型和精美的晶格中使用连续的数据外推数据。在扰动侧，我们使用PNRQCD和真空渐近线的组合来描述光谱函数。考虑到系统误差后，我们获得了一个适合描述约束状态区域的光谱函数。该光谱函数在我们的任何分析温度$ t_c $上都很好地描述了炭很好地描述了没有共振峰，而我们观察到底池的热拓宽共振峰仅在我们最大的温度下融化，$ 2.25T_C $。对于运输贡献，我们假设一个Breit-Wigner形峰，发现Charm夸克的阻力系数大于底部夸克的阻力系数。
We investigate the in-medium modifications of heavy quarkonia in the vector channel and the heavy quark diffusion coefficient by comparing Euclidean correlators from the lattice to a perturbative spectral function. On the lattice side, we work with continuum extrapolated data from four different large and fine lattices with Clover-improved Wilson fermions in the quenched approximation at five temperatures (0.75, 1.1, 1.3, 1.5 and 2.25$T_c$). On the perturbative side, we use a combination of pNRQCD and vacuum asymptotics to describe the spectral function. After accounting for systematic errors, we obtain a spectral function that is suited to describe the bound state region. This spectral function describes charmonium well without a resonance peak at any of our analyzed temperatures above $T_c$, while we observe a thermally broadened resonance peak for bottomonium that is only melted at our largest temperature, $2.25T_c$. For the transport contribution we assume a Breit-Wigner shaped peak and find that the drag coefficient of charm quarks is larger than that of bottom quarks.
