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arXiv 1003.1361hep-lat
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由双味格点量子色动力学中广义Polyakov线关联计算有限温度下的电磁屏蔽质量

Electric and Magnetic Screening Masses at Finite Temperature from Generalized Polyakov-Line Correlations in Two-flavor Lattice QCD

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

摘要:

利用广义Polyakov线关联函数,在格点量子色动力学模拟中,研究了两种改进的Wilson夸克在电扇区和磁扇区中对夸克-胶子等离子体的屏蔽.利用欧几里德时间反射($\R$)和电荷共轭($\Ca$),以规范不变的方式提取电磁屏蔽质量。发现夸克-胶子等离子体中标准Polyakov线关联的长距离行为受磁屏蔽的支配。两个屏蔽质量的比值与降维有效场论和${\cal N}=4$超对称Yang-Mills理论的结果一致。

英文摘要:

Screenings of the quark-gluon plasma in electric and magnetic sectors are studied on the basis of generalized Polyakov-line correlation functions in lattice QCD simulations with two flavors of improved Wilson quarks. Using the Euclidean-time reflection ($\R$) and the charge conjugation ($\Ca$), electric and magnetic screening masses are extracted in a gauge invariant manner. Long distance behavior of the standard Polyakov-line correlation in the quark-gluon plasma is found to be dictated by the magnetic screening. Also, ratio of the two screening masses agrees with that obtained from the dimensionally-reduced effective field theory and the ${\cal N}=4$ supersymmetric Yang-Mills theory.

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