Journal
SYMMETRY-BASEL
Volume 13, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/sym13061029
Keywords
Feynman integrals; multi-loop calculations; perturbative QFT; higher orders
Categories
Funding
- Spanish Government (Agencia Estatal de Investigacion)
- ERDF funds from European Commission [FPA2017-84445-P]
- Generalitat Valenciana [PROMETEO/2017/053, GRISOLIAP/2018/101]
- la Caixa Foundation [100010434, LCF/BQ/IN17/11620037]
- European Union [713673]
- CONACyT
- Universidad Autonoma de Sinaloa
- Spanish Government [PRE2018-085925]
- Ciencia Basica [A1-S-33202]
- COST (European Cooperation in Science and Technology) [CA16201]
- Ciencia de Frontera 2021-2042
- Sistema Nacional de Investigadores
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This article reviews the latest developments regarding the Loop-Tree Duality (LTD) theorem, focusing on the manifestly causal representation of multi-loop Feynman integrals and scattering amplitudes, as well as the definition of dual local counter-terms to cancel infrared singularities.
The Loop-Tree Duality (LTD) theorem is an innovative technique to deal with multi-loop scattering amplitudes, leading to integrand-level representations over a Euclidean space. In this article, we review the last developments concerning this framework, focusing on the manifestly causal representation of multi-loop Feynman integrals and scattering amplitudes, and the definition of dual local counter-terms to cancel infrared singularities.
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