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arXiv 0811.4664hep-lathep-ph
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三维物理和热QCD的压力

Three-dimensional physics and the pressure of hot QCD

A. Hietanen, K. Kajantie, M. Laine, K. Rummukainen, Y. Schroder

摘要:

我们更新了三维SU(3)+伴随Higgs理论的蒙特卡罗模拟,通过仔细外推到无限体积和连续极限,以估计红外模对热QCD压力的贡献。超出已知的4环阶的红外贡献的总和被证明是一个平滑的函数,具有合理的幅度和特定的符号。不幸的是,将这个函数添加到已知的4-loop项中并不能改善与四维晶格数据的匹配,尽管其他量,如相关长度、空间弦张力或夸克数可伸缩性,在相同的设置中也能很好地工作。我们概述了减少不匹配的可能方法。

英文摘要:

We update Monte Carlo simulations of the three-dimensional SU(3) + adjoint Higgs theory, by extrapolating carefully to the infinite volume and continuum limits, in order to estimate the contribution of the infrared modes to the pressure of hot QCD. The sum of infrared contributions beyond the known 4-loop order turns out to be a smooth function, of a reasonable magnitude and specific sign. Unfortunately, adding this function to the known 4-loop terms does not improve the match to four-dimensional lattice data, in spite of the fact that other quantities, such as correlation lengths, spatial string tension, or quark number susceptibilities, work well within the same setup. We outline possible ways to reduce the mismatch.

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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