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arXiv 1606.09210hep-thcond-mat.stat-mech
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$ϕ^4$理论在六圈MS-格式下的重整化群函数

Renormalization group functions of $ϕ^4$ theory in the MS-scheme to six loops

Mikhail Kompaniets, Erik Panzer

摘要:

次发散是费曼积分的一个主要障碍,有限量的表达式对分析和数值计算都有很大的优势。我们报告我们对F. Brown和D. Kreimer,他提出使用修改的BPHZ方案,其中所有的反项都是单尺度积分。该方法与超代数的参数积分相结合,特别适合于计算重整化群函数,且易于自动化。作为该方法的一个应用,我们计算了$ϕ^4$模型的6圈β函数和反常维数。

英文摘要:

Subdivergences constitute a major obstacle to the evaluation of Feynman integrals and an expression in terms of finite quantities can be a considerable advantage for both analytic and numeric calculations. We report on our implementation of the suggestion by F. Brown and D. Kreimer, who proposed to use a modified BPHZ scheme where all counterterms are single-scale integrals. Paired with parametric integration via hyperlogarithms, this method is particularly well suited for the computation of renormalization group functions and easily automated. As an application of this approach we compute the 6-loop beta function and anomalous dimensions of the $ϕ^4$ model.

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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