PreprintCC BY 4.0arXiv
Unitarity methods for Magnus amplitudes
Abstract
Magnus amplitudes refer to the matrix elements of the logarithm of the S-matrix. Modern unitarity methods construct cut-constructible parts of scattering amplitudes without directly invoking Feynman diagrams, offering an efficient way of obtaining loop integrands for scattering amplitudes. A procedure is presented that adapts unitarity methods to the computation of Magnus amplitudes.
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BibTeX
@misc{kim2026unitarity,
title = {{Unitarity methods for Magnus amplitudes}},
author = {Jung-Wook Kim and Sungsoo Kim and Jian-Rong Li},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.31345},
eprint = {2610.31345},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.31345},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Unitarity methods for Magnus amplitudes
AU - Jung-Wook Kim
AU - Sungsoo Kim
AU - Jian-Rong Li
PY - 2026
DA - 2026/10/22
PB - arXiv
DO - 10.48550/arxiv.2610.31345
UR - https://arxiv.org/abs/2610.31345
AB - Magnus amplitudes refer to the matrix elements of the logarithm of the S-matrix. Modern unitarity methods construct cut-constructible parts of scattering amplitudes without directly invoking Feynman diagrams, offering an efficient way of obtaining loop integrands for scattering amplitudes. A procedure is presented that adapts unitarity methods to the computation of Magnus amplitudes.
ER -