Braneworld Model of Dark Matter: Structure Formation
Abstract
Following a previous work [Gen. Relativ. Gravit. 43 (2011)], we further study the behavior of a real scalar field in a hidden brane in a configuration of two branes embedded in a five dimensional bulk. We find an expression for the equation of state for this scalar field in the visible brane in terms of the fields of the hidden one. Additionally, we investigated the perturbations produced by this scalar field in the visible brane with the aim to study their dynamical properties. Our results show that if the kinetic energy of the scalar field dominates during the early universe the perturbed scalar field could mimic the observed dynamics for the dark matter in the standard paradigm. Thus, the scalar field dark matter hypothesis in the context of braneworld theory could be an interesting alternative to the nature of dark matter in the Universe.
Cite
@article{arxiv.1102.0825,
title = {Braneworld Model of Dark Matter: Structure Formation},
author = {Miguel A. García-Aspeitia and Juan Magaña and Tonatiuh Matos},
journal= {arXiv preprint arXiv:1102.0825},
year = {2012}
}
Comments
10 pages, 7 figures, improved, extended in sections IV, V, more discussions to clarify some issues, references added, typos corrected. Accepted in GERG