Quasi-Thick Codimension 2 Braneworld

Details Quasi-Thick Codimension 2 Braneworld Quasi-Thick Codimension 2 Braneworld

2004-04-27

arxiv.org/abs/hep-th/0404207v2

JCAP 0407 (2004) 002

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, 1 figure, explanations and references added

Scientific paper

10.1088/1475-7516/2004/07/002

We study a codimension 2 braneworld in the Einstein Gauss-Bonnet gravity. We carefully examine the structure of possible singularities in the system which characterize the braneworld through matching conditions. Consequently, we find that the thickness of the brane can be incorporated as the distributional source, which we dub quasi-thickness. On the basis of our formalism, we analyze the linearized gravity and show the conventional Einstein gravity can be recovered on the brane. In the nonlinear regime, however, we find corrections due to the thickness and the bulk geometry. We also point out a possibility that the thickness plays a role of the dark matter/energy in the universe.

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