Localization Issues for Robertson-Walker Branes

Details Localization Issues for Robertson-Walker Branes Localization Issues for Robertson-Walker Branes

2008-07-23

arxiv.org/abs/0807.3685v1

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, revtex. Proceedings of "Cosmology and Elementary Particle Physics", Coral Gables Conference, December 2001, B. N. Ku

Scientific paper

We discuss some of the localization issues associated with the embedding of Robertson-Walker type Randall-Sundrum branes in a bulk $AdS_5$. Specifically, we show that of the branes which are embeddable in $AdS_5$ the geometry associated with $M_4$ and $dS_4$ branes warps away from the brane while that associated with $AdS_4$ and $RW$ branes of any spatial 3-curvature antiwarps away from the brane. We discuss the gravitational fluctuations around an $M_4$ brane and analyze the specific role played by a delta function singularity at the brane. We show how a bulk sine-Gordon scalar field can without any fine-tuning naturally lead to localization of gravity around an $M_4$ brane.

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