The Loop-Tree Duality (LTD) theorem is an innovative technique to deal with multi-loop scattering amplitudes, leading to integrand-level representations over an 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.
@article{arxiv.2104.14621,
title = {A stroll through the loop-tree duality},
author = {Jesús Aguilera-Verdugo and Félix Driencourt-Mangin and Roger J. Hernández-Pinto and Judith Plenter and Renato Maria Prisco and Selomit Ramírez-Uribe and Andrés Rentería-Olivo and Germán Rodrigo and German Sborlini and William J. Torres Bobadilla and Francesco Tramontano},
journal= {arXiv preprint arXiv:2104.14621},
year = {2021}
}
Comments
45 pages, 20 figures. Contribution to the special issue of Symmetry on "Higher Order Radiative Corrections in QCD"