Feynman integrals and iterated integrals of modular forms

Feynman integrals and iterated integrals of modular forms
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DOI:
10.4310/cntp.2018.v12.n2.a1
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发表时间:
2017-04
期刊:
arXiv: High Energy Physics - Phenomenology
影响因子:
--
通讯作者:
Luise Adams;S. Weinzierl
Luise Adams;S. Weinzierl
中科院分区:
其他
文献类型:
--
作者:
Luise Adams;S. Weinzierl

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在本文中,我们表明,某些费曼积分可以表示为线性组合的迭代积分的模块化形式的所有订单的尺寸正则化参数$\varepsilon$。我们明确地讨论了等质量的日出积分和风筝积分。对于这两种情况下,我们给字母表中出现的迭代积分。对于日出积分,我们提出了一个紧凑的公式,表示此积分的所有订单在$\vareps $作为迭代积分的模块化形式。
In this paper we show that certain Feynman integrals can be expressed as linear combinations of iterated integrals of modular forms to all orders in the dimensional regularisation parameter $\varepsilon$ . We discuss explicitly the equal mass sunrise integral and the kite integral. For both cases we give the alphabet of letters occurring in the iterated integrals. For the sunrise integral we present a compact formula, expressing this integral to all orders in $\varepsilon$ as iterated integrals of modular forms.