From 4d Ambitwistor Strings to On Shell Diagrams and Back
High Energy Physics - Theory
2017-09-13 v3
Abstract
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.
Cite
@article{arxiv.1705.07087,
title = {From 4d Ambitwistor Strings to On Shell Diagrams and Back},
author = {Joseph A. Farrow and Arthur E. Lipstein},
journal= {arXiv preprint arXiv:1705.07087},
year = {2017}
}
Comments
v3. minor changes, published in JHEP