Helicity Constraints To Soft Factor Of All Spin
High Energy Physics - Theory
2026-02-24 v2
Abstract
In this note, we derive for the first time a set of non-perturbative constraints for soft operators that preserve the helicities of scattering amplitudes in a soft limit. We also show that the resolution of such constraints generates a master formula for the analytic expression of the single soft factor of any given spin and helicity.
Keywords
Cite
@article{arxiv.2002.02120,
title = {Helicity Constraints To Soft Factor Of All Spin},
author = {Andriniaina Narindra Rasoanaivo},
journal= {arXiv preprint arXiv:2002.02120},
year = {2026}
}