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

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

2003-10-27

arxiv.org/abs/hep-ph/0310304v3

JCAP 0311 (2003) 009

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1088/1475-7516/2003/11/009

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.

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