论文标题
3D Gluon等离子体中的重夸克动量扩散系数
Heavy quark momentum diffusion coefficient in 3D gluon plasma
论文作者
论文摘要
我们使用实时晶状体技术研究了自相似性方案中远离平衡Gluon等离子体的远距离Quark动量扩散系数。我们使用3种方法进行提取：在时间差上集成的不等时电场2点相关器，基于测得的相等时电场相关器和动力场相关器和动力学理论（KT）公式的光谱重建（SR）方法。使用所有方法提取动量扩散系数的时间进化与近似$ t^{\ frac {-1} {2}} $ power Law一致。我们还研究了提取的扩散系数作为时间整合上限的函数，并观察到，在SR计算中包括相等时相关函数的红外增强可以大大提高与瞬态时间行为的数据的一致性。这是对先前仅在固定相关函数中观察到的红外增强的规格不变性确认。
We study the heavy-quark momentum diffusion coefficient in far from equilibrium gluon plasma in a self-similar regime using real-time lattice techniques. We use 3 methods for the extraction: an unequal time electric field 2-point correlator integrated over the time difference, a spectral reconstruction (SR) method based on the measured equal time electric field correlator and a kinetic theory (KT) formula. The time-evolution of the momentum diffusion coefficient extracted using all methods is consistent with an approximate $t^{\frac{-1}{2}}$ power law. We also study the extracted diffusion coefficient as a function of the upper limit of the time integration and observe that including the infrared enhancement of the equal-time correlation function in the SR calculation improves the agreement with the data for transient time behavior considerably. This is a gauge invariant confirmation of the infrared enhancement previously observed only in gauge fixed correlation functions.
