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arXiv 1609.09159hep-phhep-th
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具有任意质量的三圈真空积分

Three-loop vacuum integrals with arbitrary masses

Ayres Freitas

摘要:

三环真空积分是计算大范围三环修正的重要基础。到目前为止,只有一个和两个独立的质量标度的积分结果是已知的,但在电弱标准模型和许多扩展,人们经常遇到更多的质量标度可比的大小。为此,本文提出了一种计算具有任意质量分布的三圈真空积分的数值方法。具体地说,我们可以识别出三个主积分拓扑的基本集合。借助于色散关系,这些方程中的每一个都可以转换成一维的,或者对于最复杂的情况,转换成二维的初等函数积分,这适合于有效的数值积分。

英文摘要:

Three-loop vacuum integrals are an important building block for the calculation of a wide range of three-loop corrections. Until now, only results for integrals with one and two independent mass scales are known, but in the electroweak Standard Model and many extensions thereof, one often encounters more mass scales of comparable magnitude. For this reason, a numerical approach for the evaluation of three-loop vacuum integrals with arbitrary mass pattern is proposed here. Concretely, one can identify a basic set of three master integral topologies. With the help of dispersion relations, each of these can be transformed into one-dimensional or, for the most complicated case, two-dimensional integrals in terms of elementary functions, which are suitable for efficient numerical integration.

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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