Hubble Law and Brane Matter after Ekpyrosis
High Energy Physics - Theory
2009-11-07 v3
Abstract
We study brane matter in the ekpyrotic scenario and observe that in order to obtain standard gravity on the visible brane, the tension of the visible brane should be positive. If the sizes of both the fifth dimension and the Calabi-Yau threefold are fixed, the Israel junction conditions do not allow time-dependent brane matter. Relaxing this constraint, it is possible to obtain approximately standard cosmology on the visible brane, with small corrections due to possible time-dependence of the Calabi-Yau threefold.
Keywords
Cite
@article{arxiv.hep-th/0106282,
title = {Hubble Law and Brane Matter after Ekpyrosis},
author = {Kari Enqvist and Esko Keski-Vakkuri and Syksy Rasanen},
journal= {arXiv preprint arXiv:hep-th/0106282},
year = {2009}
}
Comments
17 pages, LaTex2e. v2: References added, discussion clarified. v3: Summary of tension debate revised, wordings clarified