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G. F. R. Sborlini, F. Driencourt-Mangin, R. Hernández-Pinto and G. Rodrigo, “Four-dimensional unsubtraction from the loop-tree duality,” JHEP 1608
Original
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2020

Asymptotic expansions through the loop-tree duality

Plenter, Judith, Rodrigo, Germán

Understand

First results towards a general method for asymptotic expansions of Feynman amplitudes in the loop-tree duality (LTD) formalism are presented.

The asymptotic expansion takes place at integrand-level in the Euclidean space of the loop three-momentum, where the hierarchies among internal and external scales are well-defined.
Additionally, the UV behaviour of the individual contributions to the asymptotic expansion emerges only in the first terms of the expansion and is renormalized locally in four space-time dimensions.
These two properties represent an advantage over the method of Expansion by Regions (EbR).