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arXiv 2007.06591hep-thhep-ph
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三圈阶广义标量重整化群方程

General scalar renormalisation group equations at three-loop order

Tom Steudtner

摘要:

对于四维任意标量量子场论,采用$\overline{\text{MS}}$方案,以三圈为序计算了四次和三次相互作用的重整化群方程、质量项以及场反常维数.利用预先存在的文献表达式的一个特定的模型,回路积分被避免,并获得一般理论的模板。我们重申了已知的四圈表达式,并由此导出了标量质量和立方相互作用的$β$函数,作为例子,将所得结果应用于计算$U(n) \times U(n)$标量理论中的所有重整化群方程.

英文摘要:

For arbitrary scalar QFTs in four dimensions, renormalisation group equations of quartic and cubic interactions, mass terms, as well as field anomalous dimensions are computed at three-loop order in the $\overline{\text{MS}}$ scheme. Utilising pre-existing literature expressions for a specific model, loop integrals are avoided and templates for general theories are obtained. We reiterate known four-loop expressions, and derive $β$ functions for scalar masses and cubic interactions from it. As an example, the results are applied to compute all renormalisation group equations in $U(n) \times U(n)$ scalar theories.

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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