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arXiv 1709.00545math-phmath.COmath.MP
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图的模空间上的Feynman振幅

Feynman amplitudes on moduli spaces of graphs

Marko Berghoff

摘要:

本文引入了有色图的模空间,在此空间上费曼振幅可以看作是“离散的”体密度。这种构造背后的基本思想是,这些模空间分解成开胞的不相交并集,在这些开胞上以自然的方式定义参数费曼积分。振幅的重正化然后转化为向每个单元分配有限体积的任务,使得尊重相邻单元之间的边界关系。它表明,这可以有系统地组织使用这些模空间的Borel-Serre紧化的类型。关键是,在每个紧化细胞的新添加的边界组件有一个组合的描述,类似于森林结构的子分歧的相应费曼图。

英文摘要:

This article introduces moduli spaces of coloured graphs on which Feynman amplitudes can be viewed as 'discrete' volume densities. The basic idea behind this construction is that these moduli spaces decompose into disjoint unions of open cells on which parametric Feynman integrals are defined in a natural way. Renormalisation of an amplitude translates then into the task of assigning to every cell a finite volume such that boundary relations between neighboring cells are respected. It is shown that this can be organized systematically using a type of Borel-Serre compactification of these moduli spaces. The key point is that in each compactified cell the newly added boundary components have a combinatorial description that resembles the forest structure of subdivergences of the corresponding Feynman diagram.

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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