Scaling solution, radion stabilization, and initial condition for brane-world cosmology

Details Scaling solution, radion stabilization, and initial condition for brane-world cosmology Scaling solution, radion stabilization, and initial condition for brane-world cosmology

2003-10-15

arxiv.org/abs/hep-th/0310140v2

Phys.Rev. D69 (2004) 064029

Physics

High Energy Physics

High Energy Physics - Theory

17 pages; version accepted for PRD, references added

Scientific paper

10.1103/PhysRevD.69.064029

We propose a new, self-consistent and dynamical scenario which gives rise to well-defined initial conditions for five-dimensional brane-world cosmologies with radion stabilization. At high energies, the five-dimensional effective theory is assumed to have a scale invariance so that it admits an expanding scaling solution as a future attractor. The system automatically approaches the scaling solution and, hence, the initial condition for the subsequent low-energy brane cosmology is set by the scaling solution. At low energies, the scale invariance is broken and a radion stabilization mechanism drives the dynamics of the brane-world system. We present an exact, analytic scaling solution for a class of scale-invariant effective theories of five-dimensional brane-world models which includes the five-dimensional reduction of the Horava-Witten theory, and provide convincing evidence that the scaling solution is a future attractor.

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