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arXiv 0902.2856hep-phhep-latnucl-th
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经典格点规范理论中的重夸克热化:对强耦合QCD的启示

Heavy Quark Thermalization in Classical Lattice Gauge Theory: Lessons for Strongly-Coupled QCD

Mikko Laine, Guy D. Moore, Owe Philipsen, Marcus Tassler

摘要:

近静止重夸克的热化是由沿时间威尔逊线的两个电场的相关控制的。我们在实时,经典的晶格杨米尔斯理论中解决这个相关器,并详细说明与热QCD动力学存在的类比。在弱耦合极限下,可以用解析的方法证明,两边的动力学是密切相关的。对于中间耦合,我们在经典理论中进行了非微扰模拟,表明弱耦合膨胀中的主导项显着低估了重夸克热化率。我们的分析和数值计算结果也产生了一个一般的理解有关的整体形状的光谱函数对应的电场相关器,这可能是有帮助的,在随后的努力重建它从欧几里德晶格蒙特卡罗模拟。

英文摘要:

Thermalization of a heavy quark near rest is controlled by the correlator of two electric fields along a temporal Wilson line. We address this correlator within real-time, classical lattice Yang-Mills theory, and elaborate on the analogies that exist with the dynamics of hot QCD. In the weak-coupling limit, it can be shown analytically that the dynamics on the two sides are closely related to each other. For intermediate couplings, we carry out non-perturbative simulations within the classical theory, showing that the leading term in the weak-coupling expansion significantly underestimates the heavy quark thermalization rate. Our analytic and numerical results also yield a general understanding concerning the overall shape of the spectral function corresponding to the electric field correlator, which may be helpful in subsequent efforts to reconstruct it from Euclidean lattice Monte Carlo simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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