Screening bulk curvature in the presence of large brane tension

Details Screening bulk curvature in the presence of large brane tension Screening bulk curvature in the presence of large brane tension

2011-02-24

arxiv.org/abs/1102.5091v1

Phys.Rev.D83:124004,2011

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, 2 figures

Scientific paper

10.1103/PhysRevD.83.124004

We study a flat brane solution in an effective 5D action for cascading gravity and propose a mechanism to screen extrinsic curvature in the presence of a large tension on the brane. The screening mechanism leaves the bulk Riemann-flat, thus making it simpler to generalize large extra dimension dark energy models to higher codimensions. By studying an action with cubic interactions for the brane-bending scalar mode, we find that the perturbed action suffers from ghostlike instabilities for positive tension, whereas it can be made ghost-free for sufficiently small negative tension.

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