Some studies on dark energy related problems
Abstract
In this work we perform some studies related to dark energy. Firstly, we propose a dynamical approach to explain the dark energy content of the universe. We assume that a massless scalar field couples to the Hubble parameter with some Planck-mass suppressed interactions. This scalar field developes a Hubble parameter-dependent (thus time-dependent) vacum expectation value, which renders a time-independent relative density for dark energy and thus can explain the coincidence of the dark energy density of the universe. Secondly, we assume the dark matter particle is meta-stable and decays very lately into the dark energy scalar field. Such a conversion of matter to dark energy can give an explanation for the starting time of the accelerating expansion of the universe. Thirdly, we introduce multiple Affleck-Dine fields to the landscape scenario of dark energy in order to have the required baryon-asymmetry universe.
Keywords
Cite
@article{arxiv.hep-ph/0504046,
title = {Some studies on dark energy related problems},
author = {Fei Wang and Jin Min Yang},
journal= {arXiv preprint arXiv:hep-ph/0504046},
year = {2009}
}
Comments
9 pages, 1 fig