Phenomenological Aspects of Horava-Lifshitz Cosmology
High Energy Physics - Theory
2014-11-18 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We show that, assuming the dispersion relation proposed recently by Horava in the context of quantum gravity, radiation energy density exhibits a peculiar dependence on the scale factor; the radiation energy density decreases proportional to a^{-6}. This simple scaling can have an impact on cosmology. As an example, we show that the resultant baryon asymmetry as well as the stochastic gravity waves can be enhanced. We also discuss current observational constraint on the dispersion relation.
Keywords
Cite
@article{arxiv.0905.0055,
title = {Phenomenological Aspects of Horava-Lifshitz Cosmology},
author = {Shinji Mukohyama and Kazunori Nakayama and Fuminobu Takahashi and Shuichiro Yokoyama},
journal= {arXiv preprint arXiv:0905.0055},
year = {2014}
}
Comments
10 pages, 1 figure; minor correction