期刊
COMPUTER PHYSICS COMMUNICATIONS
卷 273, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.cpc.2021.108267
关键词
Perturbation theory; Feynman diagrams; Expansions; Multi-loop; Numerical integration
资金
- COST Action of the European Union [CA16201]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [396021762 - TRR 257]
- Swiss National Science Foundation (SNF) [200020-175595]
- Royal Society University Research Fellowship [URF/R1/201268]
We discuss the technique of expansion by regions and its implementation within pySecDec, a toolbox for evaluating dimensionally regulated parameter integrals. The program offers an automated way to perform asymptotic expansions and provides a new mechanism for efficiently evaluating amplitudes and individual integrals.
We discuss the technique of expansion by regions from a geometric perspective, and its implementation within pySecDec, a toolbox for the evaluation of dimensionally regulated parameter integrals. The program offers an automated way to perform asymptotic expansions and provides a new mechanism for efficiently evaluating amplitudes, as well as individual integrals. The usage of the new features available within pySecDecis illustrated with several examples. (C) 2021 Elsevier B.V. All rights reserved.
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