Heavy quark diffusion in perturbative QCD at next-to-leading order
Heavy quark diffusion in perturbative QCD at next-to-leading order
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DOI：
10.1103/physrevlett.100.052301
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发表时间：
2008-02-08
影响因子：
8.6
通讯作者：
Moore, Guy D.
中科院分区：
文献类型：
--
作者：
Caron-Huot, Simon;Moore, Guy D.
我们计算了热QCD等离子体中重夸克的动量扩散系数，在弱耦合展开下达到次领先阶。修正出现在O（g（s））;物理上，它们代表重叠散射之间的干扰，以及软，电标度（p类似于gT）规范场物理，我们使用硬热环有效理论治疗。在三色三味QCD中，次主导级基本表象重夸克的动量扩散常数为kappa = 16 π/3 α T-2（s）3（ln/1g（s）+ 0.07428+1.9026g（s））.微扰展开的收敛性较差。
We compute the momentum diffusion coefficient of a heavy quark in a hot QCD plasma, to next-to-leading order in the weak-coupling expansion. Corrections arise at O(g(s)); physically they represent interference between overlapping scatterings, as well as soft, electric scale (p similar to gT) gauge field physics, which we treat using the hard thermal loop effective theory. In 3-color, 3-flavor QCD, the momentum diffusion constant of a fundamental representation heavy quark at next-to-leading order is kappa = 16 pi/3 alpha T-2(s)3(ln/1g(s) + 0.07428+1.9026g(s)). The convergence of the perturbative expansion is poor.