Measuring the cosmological density perturbation

Details Measuring the cosmological density perturbation Measuring the cosmological density perturbation

2005-03-28

arxiv.org/abs/hep-ph/0503271v2

Nucl.Phys.Proc.Suppl.148:1-6,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 4 figures; Talk at Workshop on `The Density Perturbation in the Universe', Athens, June 2004 (references added, no ch

Scientific paper

10.1016/j.nuclphysbps.2005.04.04

Precision measurements of anisotropies in the cosmic microwave background and of the clustering of large-scale structure have supposedly confirmed that the primordial density perturbation has a (nearly) scale-invariant spectrum. However this conclusion is based on assumptions about the world model and the nature of the dark matter. Physical models of inflation suggest that the spectrum may not in fact be scale-free, which would imply rather different cosmological parameters on the basis of the same observational data.

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