Vacuum Energy Density and Cosmological Constant in dS Brane World

Details Vacuum Energy Density and Cosmological Constant in dS Brane World Vacuum Energy Density and Cosmological Constant in dS Brane World

2002-12-26

arxiv.org/abs/hep-th/0212310v4

Int.J.Mod.Phys. A20 (2005) 2157-2168

Physics

High Energy Physics

High Energy Physics - Theory

16 pages,4 figures

Scientific paper

10.1142/S0217751X05020720

We discuss the vacuum energy density and the cosmological constant of dS$_5$ brane world with a dilaton field. It is shown that a stable AdS$_4$ brane can be constructed and gravity localization can be realized. An explicit relation between the dS bulk cosmological constant and the brane cosmological constant is obtained. The discrete mass spectrum of the massive scalar field in the AdS$_4$ brane is used to acquire the relationship between the brane cosmological constant and the vacuum energy density. The vacuum energy density in the brane gotten by this method is in agreement with astronomical observations.

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