Cutting-Edge Tools for Cutting Edges
High Energy Physics - Theory
2025-01-09 v1 High Energy Physics - Phenomenology
Abstract
We review different notions of cuts appearing throughout the literature on scattering amplitudes. Despite similar names, such as unitarity cuts or generalized cuts, they often represent distinct computations and distinct physics. We consolidate this knowledge, summarize how cuts are used in various computational strategies, and explain their relations to other quantities including imaginary parts, discontinuities, and monodromies. Differences and nuances are illustrated on explicit examples.
Cite
@article{arxiv.2402.19415,
title = {Cutting-Edge Tools for Cutting Edges},
author = {Ruth Britto and Claude Duhr and Holmfridur S. Hannesdottir and Sebastian Mizera},
journal= {arXiv preprint arXiv:2402.19415},
year = {2025}
}
Comments
23 pages, invited contribution to the Encyclopedia of Mathematical Physics