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:
影响因子:
--
通讯作者:
Luise Adams;S. Weinzierl
中科院分区:
文献类型:
--
作者:
Luise Adams;S. Weinzierl
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.