Kira 3: integral reduction with efficient seeding and optimized equation selection
Abstract
We present version 3 of Kira, a Feynman integral reduction program for high-precision calculations in quantum field theory and gravitational-wave physics. Building on previous versions, Kira 3 introduces optimized seeding and equation selection algorithms, significantly improving performance for multi-loop and multi-scale problems. New features include convenient numerical sampling, symbolic integration-by-parts reductions, and support for user-defined additional relations. We demonstrate its capabilities through benchmarks on two- and three-loop topologies, showcasing up to two orders of magnitude improvement over Kira 2.3. Kira 3 is publicly available and poised to support ambitious projects in particle physics and beyond.
Keywords
Cite
@article{arxiv.2505.20197,
title = {Kira 3: integral reduction with efficient seeding and optimized equation selection},
author = {Fabian Lange and Johann Usovitsch and Zihao Wu},
journal= {arXiv preprint arXiv:2505.20197},
year = {2025}
}
Comments
33 pages, 5 figures, 7 tables