Scale-invariant power spectra from a Weyl-invariant scalar-tensor theory
General Relativity and Quantum Cosmology
2016-02-19 v2 High Energy Physics - Theory
Abstract
We obtain scale-invariant scalar and tensor power spectra from a Weyl-invariant scalar-tensor theory in de Sitter spacetime. This implies that the Weyl-invariance guarantees to implement the scale-invariance of power spectrum in de Sitter spacetime. We establish a deep connection between the Weyl-invariance of the action and scale-invariance of power spectrum in de Sitter spacetime.
Keywords
Cite
@article{arxiv.1508.04188,
title = {Scale-invariant power spectra from a Weyl-invariant scalar-tensor theory},
author = {Yun Soo Myung and Young-Jai Park},
journal= {arXiv preprint arXiv:1508.04188},
year = {2016}
}
Comments
19 pages, no figures, version to appear in EPJC. arXiv admin note: text overlap with arXiv:1407.0441