Consistency equations in Randall-Sundrum cosmology: a test for braneworld inflation

Abstract

In the context of an inflationary Randall-Sundrum Type II braneworld (RS2) we calculate spectral indices and amplitudes of cosmological scalar and tensor perturbations, up to second order in slow-roll parameters. Under very simple assumptions, extrapolating next-order formulae from first-order calculations in the case of a de Sitter brane, we see that the degeneracy between standard and braneworld lowest-order consistency equations is broken, thus giving different signatures of early-universe inflationary expansion. Using the latest results from WMAP for estimates of cosmological observables, it is shown that future data and missions can in principle discriminate between standard and braneworld scenarios.

13 pages; v3: supersedes the published version, corrected misprints

References in corpus (1)

• Geometry and cosmological perturbations in the bulk inflaton model

Cited by in corpus (21)

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• Slow-roll corrections to inflaton fluctuations on a brane
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• Numerical study of curvature perturbations in a brane-world inflation at high-energies
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• High-Energy theory for close Randall Sundrum branes
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• Cosmological constraints from Gauss-Bonnet braneworld with large-field potentials
• From WMAP to Planck: Exact reconstruction of 4- and 5-dimensional inflationary potential from high precision CMB measurements