English

Asymptotic Symmetries and Weinberg's Soft Photon Theorem in Mink$_{d+2}$

High Energy Physics - Theory 2023-09-25 v3 High Energy Physics - Phenomenology

Abstract

We show that Weinberg's leading soft photon theorem in massless abelian gauge theories implies the existence of an infinite-dimensional large gauge symmetry which acts non-trivially on the null boundaries I±{\mathscr I}^\pm of (d+2)(d+2)-dimensional Minkowski spacetime. These symmetries are parameterized by an arbitrary function ε(x)\varepsilon(x) of the dd-dimensional celestial sphere living at I±{\mathscr I}^\pm. This extends the previously established equivalence between Weinberg's leading soft theorem and asymptotic symmetries from four and higher even dimensions to \emph{all} higher dimensions.

Keywords

Cite

@article{arxiv.1903.02608,
  title  = {Asymptotic Symmetries and Weinberg's Soft Photon Theorem in Mink$_{d+2}$},
  author = {Temple He and Prahar Mitra},
  journal= {arXiv preprint arXiv:1903.02608},
  year   = {2023}
}

Comments

30 pages; v2: Added reference and minor clarification comments, fixed minor typos, version to appear in JHEP; v3: Corrected minor typo in equation