A Note on Single Soft Scalar Emission of $\mathcal{N}=8$ SUGRA and $E_{7(7)}$ Symmetry
High Energy Physics - Theory
2010-08-10 v2 General Relativity and Quantum Cosmology
Abstract
We study single soft scalar emission amplitudes of supergravity (SUGRA) at the one-loop level using an explicit formula for one-loop amplitudes in terms of tree amplitudes, which in turn are evaluated using supersymmetric BCFW recursion relations. It turns out that the infrared finite parts of all such amplitudes vanish in the soft momentum limit, which supports the conjecture that symmetry has no anomalies at the one-loop level.
Keywords
Cite
@article{arxiv.0812.4533,
title = {A Note on Single Soft Scalar Emission of $\mathcal{N}=8$ SUGRA and $E_{7(7)}$ Symmetry},
author = {Song He and Huaxing Zhu},
journal= {arXiv preprint arXiv:0812.4533},
year = {2010}
}
Comments
18 pages, 3 figures; some clarifications made, new references added