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arXiv 2102.02769hep-th
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切割和等基因

Cuts and Isogenies

Hjalte Frellesvig, Cristian Vergu, Matthias Volk, Matt von Hippel

摘要:

我们考虑出现在日出的切口和椭圆双箱费曼积分的genus-one曲线。我们以多种方式计算和比较这些曲线的不变量,包括Feynman参数化,光锥和Baikov(完整和逐环变量)。我们发现,在所有情况下,出现相同的几何形状的genus-one曲线,这有助于支持的想法,存在一个不变的概念genus-one几何,独立于它的计算方式。我们进一步指出如何解释以前的一些结果,发现这些曲线是相关的,而不是同源。

英文摘要:

We consider the genus-one curves which arise in the cuts of the sunrise and in the elliptic double-box Feynman integrals. We compute and compare invariants of these curves in a number of ways, including Feynman parametrization, lightcone and Baikov (in full and loop-by-loop variants). We find that the same geometry for the genus-one curves arises in all cases, which lends support to the idea that there exists an invariant notion of genus-one geometry, independent on the way it is computed. We further indicate how to interpret some previous results which found that these curves are related by isogenies instead.

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