2003/10/31 by Gianluca Calcagni · 2 citations
Physics and Astronomy · #Advanced Mathematical Theories and Applications #Amplitude #Black Holes and Theoretical Physics #CMB cold spot #Consistency (knowledge bases) #Context (archaeology) #Cosmological perturbation theory #Cosmology #Cosmology and Gravitation Theories #De Sitter universe #Degeneracy (biology) #Inflation (cosmology) #Scalar (mathematics) #astro-ph #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2003/11/009
published as JCAP 0311 (2003) 009 · 13 pages; v3: supersedes the published version, corrected misprints
openalex publication_date 2003/11/18 · arxiv created 2004/04/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.