Localized gravity on de Sitter brane in five dimensions

Details Localized gravity on de Sitter brane in five dimensions Localized gravity on de Sitter brane in five dimensions

2002-04-14

arxiv.org/abs/hep-th/0204113v7

Europhys.Lett.64:295-301,2003

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, final version in Europhysics Letters

Scientific paper

10.1209/epl/i2003-00101-8

We consider a single brane embedded in five dimensions with vanishing and positive bulk cosmological constant. In this setup, the existence of $dS_{4}$ brane is allowed. We explore the gravitational fluctuations on the brane, and we point out that the usual four-dimensional gravity can be reproduced by a normalizable zero mode and that the continuous massive modes are separated by a mass gap from zero mode. We derive the relation among the cosmological constant in the brane, and the fundamental scale of five dimensions and Planck scale. Finally we show that not zero but tiny observed cosmological constant cannot be realized in this setup.

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