From multiple unitarity cuts to the coproduct of Feynman integrals
From multiple unitarity cuts to the coproduct of Feynman integrals
复制标题
从多重酉割到费曼积分的余积
DOI:
10.1007/jhep10(2014)125
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发表时间:
2014
影响因子:
5.4
通讯作者:
Abreu S
中科院分区:
文献类型:
--
作者:
Abreu S
We develop techniques for computing and analyzing multiple unitarity cuts of Feynman integrals, and reconstructing the integral from these cuts. We study the relations among unitarity cuts of a Feynman integral computed via diagrammatic cutting rules, the discontinuity across the corresponding branch cut, and the coproduct of the integral. For single unitarity cuts, these relations are familiar. Here we show that they can be generalized to sequences of unitarity cuts in different channels. Using concrete one-and two-loop scalar integral examples we demonstrate that it is possible to reconstruct a Feynman integral from either single or double unitarity cuts. Our results offer insight into the analytic structure of Feynman integrals as well as a new approach to computing them.
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DOI:
10.1016/s0550-3213(01)00057-8
发表时间:
2000
期刊:
arXiv: High Energy Physics - Phenomenology
影响因子:
--
作者:
T. Gehrmann;E. Remiddi
通讯作者:
E. Remiddi
DOI:
10.1016/s0550-3213(01)00095-5
发表时间:
2000
期刊:
Nuclear Physics
影响因子:
--
作者:
A. I. Davydychev;M. Kalmykov
通讯作者:
M. Kalmykov
DOI:
--
发表时间:
1971
期刊:
影响因子:
--
作者:
H. Stapp
通讯作者:
H. Stapp
影响因子:
1.3
作者:
C. Bogner;S. Weinzierl
通讯作者:
S. Weinzierl
影响因子:
5.4
作者:
L. Dixon;J. Drummond;J. Henn
通讯作者:
J. Henn