5-Dimensional Warped Cosmological Solutions With Radius Stabilization by a Bulk Scalar
arXiv:hep-th/0008185 · doi:10.1016/S0370-2693(00)01254-5
Abstract
We present the 5-dimensional cosmological solutions in the Randall-Sundrum warped compactification scenario, using the Goldberger-Wise mechanism to stabilize the size of the extra dimension. Matter on the Planck and TeV branes is treated perturbatively, to first order. The back-reaction of the scalar field on the metric is taken into account. We identify the appropriate gauge-invariant degrees of freedom, and show that the perturbations in the bulk scalar can be gauged away. We confirm previous, less exact computations of the shift in the radius of the extra dimension induced by matter. We point out that the physical mass scales on the TeV brane may have changed significantly since the electroweak epoch due to cosmological expansion, independently of the details of radius stabilization.
8 pages; now fully gauge invariant formulation; some results shown to be independent of stiff brane potential assumption; added references; results unchanged
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