de Sitter Galileon
High Energy Physics - Theory
2015-05-27 v1 General Relativity and Quantum Cosmology
Abstract
We generalize the Galileon symmetry and its relativistic extension to a de Sitter background. This is made possible by studying a probe-brane in a flat five-dimensional bulk using a de Sitter slicing. The generalized Lovelock invariants induced on the probe brane enjoy the induced Poincar\'e symmetry inherited from the bulk, while living on a de Sitter geometry. The non-relativistic limit of these invariants naturally maintain a generalized Galileon symmetry around de Sitter while being free of ghost-like pathologies. We comment briefly on the cosmology of these models and the extension to the AdS symmetry as well as generic FRW backgrounds.
Cite
@article{arxiv.1104.0155,
title = {de Sitter Galileon},
author = {Clare Burrage and Claudia de Rham and Lavinia Heisenberg},
journal= {arXiv preprint arXiv:1104.0155},
year = {2015}
}