The electromagnetic coupling and the dark side of the Universe
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
We examine the properties of dark energy and dark matter through the study of the variation of the electromagnetic coupling. For concreteness, we consider the unification model of dark energy and dark matter, the generalized Chaplygin gas model (GCG), characterized by the equation of state $p=-\frac{A}{ρ^α}$, where $p$ is the pressure, $ρ$ is the energy density and $A$ and $α$ are positive constants. The coupling of electromagnetism with the GCG's scalar field can give rise to such a variation. We compare our results with experimental data, and find that the degeneracy on parameters $α$ and $A_s$, $A_s \equiv A / ρ_{ch0}^{1+α}$, is considerable.
Revtex 4, 5 pages and 5 figures
Revtex 4, 5 pages and 5 figures