Flow Oriented Perturbation Theory
Abstract
Flow Oriented Perturbation Theory (FOPT) is a novel approach to Feynman diagrams based on the coordinate (position) space description of Quantum Field Theories (QFT). FOPT offers interesting features regarding the computation of higher-loop Feynman amplitudes such as combinatorial and canonical Feynman rules, explicit infrared singularity factorization on a per-diagram level and the potential to have manifest cancellation of real and virtual singularities. In these proceedings we briefly summarize the derivation of FOPT and present its Feynman rules for covariant diagrams, S-matrix elements and cut diagrams in massless scalar QFT, supported by examples. We then discuss the extension of FOPT to massless fermion fields and indicate steps towards the treatment of massive lines in arbitrary dimensions.
Cite
@article{arxiv.2310.09708,
title = {Flow Oriented Perturbation Theory},
author = {Alexandre Salas-Bernárdez and Michael Borinsky and Zeno Capatti and Eric Laenen},
journal= {arXiv preprint arXiv:2310.09708},
year = {2024}
}
Comments
Proceedings for the 16th International Symposium on Radiative Corrections: Applications of Quantum Field Theory to Phenomenology (RADCOR2023) 28th May - 2nd June, 2023 Crieff, Scotland, UK