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arXiv 0811.0426hep-lat
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由Polyakov环关联得到的磁和电屏蔽质量

Magnetic and electric screening masses from Polyakov-loop correlations

Y. Maezawa, S. Aoki, S. Ejiri, T. Hatsuda, N. Ishii, K. Kanaya, N. Ukita, T. Umeda

摘要:

在格点量子色动力学模拟中,用两种改进的Wilson夸克在温度$T/\Tpc \simeq 1$ -4(其中$\Tpc$为赝临界温度)下,从Polyakov圈关联研究了夸克-胶子等离子体的屏蔽性质.利用欧几里德时间反射对称性和电荷共轭对称性,我们引入了各种类型的Polyakov环关联函数,并提取了磁区和电区的屏蔽质量。我们发现,屏蔽质量的温度依赖性很好地描述了弱耦合展开。我们还发现,在电部门的屏蔽质量的比例,磁部门显示定性协议的预测从降维有效场论和N=4超对称杨-米尔斯理论在$1.3 < T/\Tpc < 3$。

英文摘要:

Screening properties of the quark gluon plasma are studied from Polyakov-loop correlation in lattice QCD simulations with two flavors of improved Wilson quarks at temperatures $T/\Tpc \simeq 1$--4 where $\Tpc$ is the pseudocritical temperature. Using the Euclidean-time reflection symmetry and the charge conjugation symmetry, we introduce various types of Polyakov-loop correlation functions and extract screening masses in magnetic and electric sectors. We find that the temperature dependence of the screening masses are well described by the weak coupling expansion. We also find that a ratio of the screening masses in the electric sector to the magnetic sector shows qualitative agreement with a prediction from the dimensionally-reduced effective field theory and the N=4 supersymmetric Yang-Mills theory at $1.3 < T/\Tpc < 3$.

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