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From 4d ambitwistor strings to on shell diagrams and back.

Farrow, Joseph A. and Lipstein, Arthur E. (2017) 'From 4d ambitwistor strings to on shell diagrams and back.', Journal of high energy physics., 2017 (7). p. 114.


We investigate the relation between 4d ambitwistor string theory and on-shell diagrams for planar N = 4 super-Yang-Mills and N = 8 supergravity, and deduce several new results about their scattering amplitudes at tree-level and 1-loop. In particular, we derive new Grassmannian integral formulae for tree-level amplitudes and obtain new worldsheet formulae for 1-loop amplitudes which are manifestly supersymmetric and supported on scattering equations refined by MHV degree.

Item Type:Article
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Publisher statement:© The Author(s) 2017 Article funded by SCOAP3. Open Access. 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:07 July 2017
Date deposited:01 August 2017
Date of first online publication:25 July 2017
Date first made open access:No date available

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