Expansion by regions: an overview
High Energy Physics - Theory
2024-06-18 v1 High Energy Physics - Phenomenology
Abstract
A short review of expansion by regions is presented. It is a well-known strategy to obtain an expansion of a given multiloop Feynman integral in a given limit where some kinematic invariants and/or masses have certain scaling measured in powers of a given small parameter. Prescriptions of this strategy are formulated in a simple geometrical language and are illustrated through simple examples.
Keywords
Cite
@article{arxiv.2406.11475,
title = {Expansion by regions: an overview},
author = {Vladimir A. Smirnov},
journal= {arXiv preprint arXiv:2406.11475},
year = {2024}
}
Comments
13 pages, 3 figures, published in "Anti-Differentiation and the Calculation of Feynman Amplitudes", ed. J. Bl\"umlein and C. Schneider, Springer 2021, doi:10.1007/978-3-030-80219-6. arXiv admin note: text overlap with arXiv:1809.04325