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arXiv 1402.5137hep-ph
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2+1维SU(Nc)规范理论的矩阵模型

Matrix model for deconfinement in a SU(Nc) gauge theory in 2+1 dimensions

Pedro Bicudo, Robert D. Pisarski, Elina Seel

摘要:

本文用有效的矩阵模型研究了d=2+1维无夸克纯SU(Nc)规范理论的退禁闭。在背景A_0不变的情况下,我们构造了一个有效势,它对应于一般N_c和大N_c极限下的热Wilson线的本征值。使用一个,两个,和四个自由参数,这是通过直接拟合到晶格数据的压力确定的数值结果。从微扰极限到临界温度,矩阵模型的压力和相互作用措施与数值晶格模拟结果吻合良好。对于压力,A0依赖的非微扰项的细节仅在低于~1.2 Td的窄过渡区中相关。这也是波利雅科夫环路明显偏离1的范围。与晶格结果一致,我们发现,直到一个微不足道的因子Nc ^[2 -1],只有轻微的依赖于颜色的数量。

英文摘要:

We use an effective matrix model to study deconfinement in a pure SU(Nc) gauge theory, without quarks, in d=2+1 dimensions. Expanding about a constant background A0 field we construct an effective potential for the eigenvalues of the thermal Wilson line for general Nc and in the large-Nc limit. The numerical results are presented using one, two, and four free parameters, which are determined by fitting directly to the lattice data for the pressure. The matrix model shows a good agreement with numerical lattice simulations for the pressure and the interaction measure, starting from the perturbative limit up to the critical temperature. For the pressure, the details of A0- dependent nonperturbative terms are relevant only in a narrow transition region below ~1.2 Td. This is also the range where the Polyakov loop deviates notably from one. In accordance with the lattice results we find that, up to a trivial factor Nc^2-1, there is only a mild dependence on the number of colors.

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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