论文标题
在夸克 - 胶状等离子体中进行重夸克扩散的流体动力方法
A fluid-dynamic approach to heavy-quark diffusion in the quark-gluon plasma
论文作者
论文摘要
提出了一种流体动力的方法，用于提出重夸克在夸克血浆（QGP）中的扩散。具体而言，我们分析了Fokker-Planck方程，从流体的角度来看，重型夸克的动量运输，并使用映射到二阶流体动力学来确定控制的电导率和放松时间，以管理其空间扩散。通过调查两种方法之间的关系，我们提供了有关扩展QGP内部魅力和底部夸克的局部热化水平的新见解。我们的结果表明，至少对于火球演化的最新阶段，对魅力夸克的扩散描述是可行的。
A fluid-dynamic approach to the diffusion of heavy quarks in the quark--gluon plasma (QGP) is presented. Specifically, we analyze the Fokker-Planck equation for the momentum transport of heavy quarks from a fluid perspective and use a mapping to second-order fluid-dynamics to determine conductivities and relaxation times governing their spatial diffusion. By investigating the relation between the two approaches, we provide new insights concerning the level of local thermalization of charm and bottom quarks inside the expanding QGP. Our results indicate that a fluid-dynamic description of diffusion is feasible for charm quarks at least for the latest stages of the fireball evolution.
