PreprintarXiv licencearXiv
Covariant BCFW for All Masses
Abstract
We use the massive spinor-helicity formalism to describe a novel construction for massive spinors which allows one to connect the many choices of bases useful in the representation of amplitudes involving massive particles, and we use this to derive a new formulation for the general BCFW shift that is valid regardless whether or which of the particles involved are massive or massless. This formalism should help facilitate a more coherent implementation of on-shell recursion for computing amplitudes involving massive particles in four dimensions.
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BibTeX
@misc{bourjaily2026covariant,
title = {{Covariant BCFW for All Masses}},
author = {Jacob L. Bourjaily and Michael Plesser},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.10686},
eprint = {2610.10686},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.10686},
}
RIS
TY - UNPB
TI - Covariant BCFW for All Masses
AU - Jacob L. Bourjaily
AU - Michael Plesser
PY - 2026
DA - 2026/10/07
PB - arXiv
DO - 10.48550/arxiv.2610.10686
UR - https://arxiv.org/abs/2610.10686
AB - We use the massive spinor-helicity formalism to describe a novel construction for massive spinors which allows one to connect the many choices of bases useful in the representation of amplitudes involving massive particles, and we use this to derive a new formulation for the general BCFW shift that is valid regardless whether or which of the particles involved are massive or massless. This formalism should help facilitate a more coherent implementation of on-shell recursion for computing amplitudes involving massive particles in four dimensions.
ER -