Off-Shell CHY Amplitudes and Feynman Graphs
High Energy Physics - Theory
2020-04-29 v3
Abstract
A polynomial form is established for the off-shell CHY scattering equations proposed by Lam and Yao. Re-expressing this in terms of independent Mandelstam invariants provides a new expression for the polynomial scattering equations, immediately valid off shell, which makes it evident that they yield the off-shell amplitudes given by massless Feynman graphs. A CHY expression for individual Feynman graphs, valid even off shell, is established through a recurrence relation.
Cite
@article{arxiv.1910.12791,
title = {Off-Shell CHY Amplitudes and Feynman Graphs},
author = {Louise Dolan and Peter Goddard},
journal= {arXiv preprint arXiv:1910.12791},
year = {2020}
}
Comments
19 pages, clarification of equations (1.13), (3.7), (3.9), added Comments, corrected reference