Cascading Gravity is Ghost Free

Details Cascading Gravity is Ghost Free Cascading Gravity is Ghost Free

2010-02-04

arxiv.org/abs/1002.1075v3

Phys. Rev. D 81, 124027 (2010)

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, minor changes, argument on vector perturbations improved

Scientific paper

10.1103/PhysRevD.81.124027

We perform a full perturbative stability analysis of the 6D cascading gravity model in the presence of 3-brane tension. We demonstrate that for sufficiently large tension on the (flat) 3-brane, there are no ghosts at the perturbative level, consistent with results that had previously only been obtained in a specific 5D decoupling limit. These results establish the cascading gravity framework as a consistent infrared modification of gravity.

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