Symmetries of Vector Perturbations during the de Sitter Epoch
Cosmology and Nongalactic Astrophysics
2015-06-15 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We analyze the class of models where a suitable coupling between the inflaton field and the vector field gives rise to scale-invariant vector perturbations. We exploit the fact that the de Sitter isometry group acts as conformal group on the three-dimensional Euclidean space for the super-Hubble fluctuations in order to characterize the correlators involving the inflaton and the vector fields.
Keywords
Cite
@article{arxiv.1304.7785,
title = {Symmetries of Vector Perturbations during the de Sitter Epoch},
author = {Matteo Biagetti and Alex Kehagias and Enrico Morgante and Hideki Perrier and Antonio Riotto},
journal= {arXiv preprint arXiv:1304.7785},
year = {2015}
}
Comments
v2: References added, last paragraph of section 4 clarified. Submitted to JCAP