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arXiv 2008.11314hep-phcond-mat.mes-hallcond-mat.str-elnucl-th
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有限温度和/或有限密度下相对论量子场论中单圈张量费曼积分的约化

Reduction for one-loop tensor Feynman integrals in the relativistic quantum field theories at finite temperature and/or finite density

Hao-Ran Chang

AI总结:

本文提出广义帕萨里诺-韦尔特曼约化方法,用于高效简化有限温度和/或有限密度下相对论量子场论中的单圈张量费曼积分,适用于夸克-胶子等离子体等系统。

摘要:

传统的帕萨里诺-韦尔特曼约化是一种基于洛伦兹协变性的系统化程序,能够高效约化零温度和零密度下相对论量子场论中的单圈张量费曼积分。然而,当温度或密度为有限值时,由于多体系统存在测量温度和密度的静止参考系,洛伦兹协变性被明确破坏,使得传统的帕萨里诺-韦尔特曼约化不再适用于约化其中的单圈张量费曼积分。本文报告了一种广义的帕萨里诺-韦尔特曼约化方法,能够高效简化有限温度和/或有限密度下相对论量子场论中的单圈张量费曼积分。该广义约化方法可分析由有限温度和/或有限密度下相对论量子场论描述的广泛物理系统中的单圈张量费曼积分,例如核物理中的夸克-胶子等离子体。

英文摘要:

The \emph{conventional} Passarino-Veltman reduction is a systematic procedure based on the Lorentz covariance, which can efficiently reduce the one-loop tensor Feynman integrals in the relativistic quantum field theories (QFTs) at zero temperature and zero density. However, the Lorentz covariance is explicitly broken when either of the temperature and density is finite, due to a rest reference frame of the many-body system in which the temperature and density are measured, rendering the \emph{conventional} Passarino-Veltman reduction not applicable anymore to reduce the one-loop tensor Feynman integrals therein. In this paper, we report a \emph{generalized} Passarino-Veltman reduction which can efficiently simplify the one-loop tensor Feynman integrals in the relativistic QFTs at finite temperature and/or finite density. The \emph{generalized} Passarino-Veltman reduction can analyze the one-loop tensor Feynman integrals in a wide range of physical systems described by the relativistic QFTs at finite temperature and/or finite density, such as quark-gluon plasma in nuclear physics.

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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