The SAGEX Review on Scattering Amplitudes, Chapter 8: Half BPS correlators
Abstract
Half BPS correlators in N=4 super Yang-Mills theory are key quantities both in the AdS/CFT correspondence as well as in scattering amplitudes research. They are dual at strong coupling to quantum gravity amplitudes. At weak coupling on the other hand they contain all N=4 SYM amplitudes. They have been found to possess a number of hidden symmetries, for example non-trivial permutation symmetry of perturbative four-point integrands and a higher dimensional conformal symmetry. Their study has enjoyed continuous progress since the discovery of AdS/CFT and they are now some of the best understood quantities of any four-dimensional quantum field theory. In this review we outline the current knowledge of half BPS correlators, emphasising these two co-existing relations to scattering amplitudes at strong and weak coupling.
Cite
@article{arxiv.2203.13019,
title = {The SAGEX Review on Scattering Amplitudes, Chapter 8: Half BPS correlators},
author = {Paul Heslop},
journal= {arXiv preprint arXiv:2203.13019},
year = {2023}
}
Comments
53 pages, see also the overview article arXiv:2203.13011. v3: journal version