The Cosmic Coincidence Problem in the Brane World
High Energy Physics - Phenomenology
2007-05-23 v1 Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
The so called `cosmic coincidence' problem seems to suggest a coupling between dark energy and dark matter. A possibility could be given by dark matter particles with masses depending exponentially on the scalar field associated to dark energy. If the latter also has an exponential potential, attractor solutions exist with constant Omega_{DM} and Omega_{DE} and negative effective equation of state. Due to the very low mass of the dark energy field, its coupling to baryons should be strongly suppressed. Here we present a natural realization of this scenario in a model with large extra dimensions.
Keywords
Cite
@article{arxiv.hep-ph/0210147,
title = {The Cosmic Coincidence Problem in the Brane World},
author = {Massimo Pietroni},
journal= {arXiv preprint arXiv:hep-ph/0210147},
year = {2007}
}
Comments
4 pages, to appear in the Proceedings of the XVIII IAP Colloquium `On the nature of dark energy', Paris, 1-5 July 2002