English

Symmetries in Celestial CFT$_d$

High Energy Physics - Theory 2023-08-02 v1

Abstract

We use tools from conformal representation theory to classify the symmetries associated to conformally soft operators in celestial CFT (CCFT) in general dimensions dd. The conformal multiplets in d>2d>2 take the form of celestial necklaces whose structure is much richer than the celestial diamonds in d=2d=2, it depends on whether dd is even or odd and involves mixed-symmetric tensor representations of SO(d)SO(d). The existence of primary descendants in CCFT multiplets corresponds to (higher derivative) conservation equations for conformally soft operators. We lay out a unified method for constructing the conserved charges associated to operators with primary descendants. In contrast to the infinite local symmetry enhancement in CCFT2{}_2, we find the soft symmetries in CCFTd>2{}_{d>2} to be finite-dimensional. The conserved charges that follow directly from soft theorems are trivial in d>2d>2, while non-trivial charges associated to (generalized) currents and stress tensor are obtained from the shadow transform of soft operators which we relate to (an analytic continuation of) a specific type of primary descendants. We aim at a pedagogical discussion synthesizing various results in the literature.

Keywords

Cite

@article{arxiv.2302.10222,
  title  = {Symmetries in Celestial CFT$_d$},
  author = {Yorgo Pano and Andrea Puhm and Emilio Trevisani},
  journal= {arXiv preprint arXiv:2302.10222},
  year   = {2023}
}

Comments

56 pages + appendices, 3 figures

R2 v1 2026-06-28T08:44:54.185Z