梯度流重夸克扩散系数
Heavy quark diffusion coefficient with gradient flow
摘要：
重夸克扩散系数被编码在色电和色磁双光子的谱函数中，其中色磁双光子描述了T/M贡献。我们在SU（3）规范理论的退禁闭相中研究了两个不同温度下的双光子系统$T=1.5T_c$和$T=10^4T_c$。我们使用梯度流进行降噪。我们执行连续和零流时间限制，以提取重夸克扩散系数。结果表明，在$T=1.5T_c$条件下，底夸克和粲夸克的质量抑制效应分别为20%和34%.
英文摘要：
The heavy quark diffusion coefficient is encoded in the spectral functions of the chromo-electric and the chromo-magnetic correlators, of which the latter describes the T/M contribution. We study these correlators at two different temperatures $T=1.5T_c$ and $T=10^4T_c$ in the deconfined phase of SU(3) gauge theory. We use gradient flow for noise reduction. We perform both continuum and zero flow time limits to extract the heavy quark diffusion coefficient. Our results imply that the mass suppressed effects in the heavy quark diffusion coefficient are 20% for bottom quarks and 34% for charm quark at $T=1.5T_c$.
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