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arXiv 2006.02617hep-phhep-thnucl-th
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N=4超对称Yang-Mills理论的双圈HTL-图解热力学

Two-loop HTL-resummed thermodynamics for N=4 supersymmetric Yang-Mills theory

Qianqian Du, Michael Strickland, Ubaid Tantary, Ben-Wei Zhang

摘要:

本文计算了N=4超对称Yang-Mills(SYM)的双圈硬热圈(HTL)近似热力学势。我们的最终结果是明显的规范不变,重整化只使用简单的真空能量,胶子质量,标量质量,夸克质量计数器条款。HTL质量参数m_D,M_D,和m_q,然后确定自洽使用变分处方,导致一组耦合的间隙方程。在此基础上,我们得到了N=4 SYM的双圈HTL-图解热力学函数。我们比较我们的最终结果与已知的结果在弱耦合和强耦合的限制。我们还比较了以前获得的近似自洽HTL近似和Padé近似。我们发现,两个循环HTL的标度熵密度的计算结果是一个定量可靠的近似的标度熵密度为0 <= lambda <~ 2,是在协议与以前的近似自洽HTL重算结果为lambda <~ 6。

英文摘要:

We compute the two-loop hard-thermal-loop (HTL) resummed thermodynamic potential for N=4 supersymmetric Yang-Mills (SYM). Our final result is manifestly gauge-invariant and was renormalized using only simple vacuum energy, gluon mass, scalar mass, and quark mass counter terms. The HTL mass parameters m_D, M_D, and m_q are then determined self-consistently using a variational prescription which results in a set of coupled gap equations. Based on this, we obtain the two-loop HTL-resummed thermodynamic functions of N=4 SYM. We compare our final result with known results obtained in the weak- and strong-coupling limits. We also compare to previously obtained approximately self-consistent HTL resummations and Padé approximants. We find that the two-loop HTL resummed results for the scaled entropy density is a quantitatively reliable approximation to the scaled entropy density for 0 <= lambda <~ 2 and is in agreement with previous approximately self-consistent HTL resummation results for lambda <~ 6.

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