Cookies

We use cookies to ensure that we give you the best experience on our website. By continuing to browse this repository, you give consent for essential cookies to be used. You can read more about our Privacy and Cookie Policy.


Durham Research Online
You are in:

N = 7 On-shell diagrams and supergravity amplitudes in momentum twistor space.

Armstrong, Connor and Farrow, Joseph A. and Lipstein, Arthur E. (2021) 'N = 7 On-shell diagrams and supergravity amplitudes in momentum twistor space.', Journal of high energy physics., 2021 (1). p. 181.

Abstract

We derive an on-shell diagram recursion for tree-level scattering amplitudes in N = 7 supergravity. The diagrams are evaluated in terms of Grassmannian integrals and momentum twistors, generalising previous results of Hodges in momentum twistor space to non-MHV amplitudes. In particular, we recast five and six-point NMHV amplitudes in terms of N = 7 R-invariants analogous to those of N = 4 super-Yang-Mills, which makes cancellation of spurious poles more transparent. Above 5-points, this requires defining momentum twistors with respect to different orderings of the external momenta.

Item Type:Article
Full text:(VoR) Version of Record
Available under License - Creative Commons Attribution 4.0.
Download PDF
(691Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1007/JHEP01(2021)181
Publisher statement:This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Date accepted:12 December 2020
Date deposited:02 February 2021
Date of first online publication:27 January 2021
Date first made open access:02 February 2021

Save or Share this output

Export:
Export
Look up in GoogleScholar