Spinning Boundary Correlators from (A)dS$_4$ Twistors
Abstract
We develop a twistor-space framework to compute boundary correlators via a boundary limit of nested Penrose transforms in (A)dS. Starting from correlators of (anti-)self-dual bulk fields, the boundary limit reproduces the correlators of the dual conserved currents; we demonstrate this explicitly for two- and three-point functions. The two-point correlator is rendered finite by working in Euclidean signature. At three points, we obtain compact rational twistor-space representatives obeying a double-copy relation, thereby clarifying the twistor-space origin of the results in Baumann et al. 2024. We further extend the analysis to non-conserved currents with integer conformal dimension, dual to massive bulk fields, as well as to the free scalar.
Cite
@article{arxiv.2510.00096,
title = {Spinning Boundary Correlators from (A)dS$_4$ Twistors},
author = {Mariana Carrillo González and Théo Keseman},
journal= {arXiv preprint arXiv:2510.00096},
year = {2025}
}
Comments
38 pages + appendices; v2: discussion improved, Ward Identity section expanded, typos fixed