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Harrison-Z'eldovich primordial spectrum is consistent with observations

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arxiv 1003.4763 v2 pith:BNMIBBKV submitted 2010-03-24 astro-ph.CO astro-ph.HEgr-qchep-ph

S. Pandolfi , A. Cooray , E. Giusarma , E. W. Kolb , A. Melchiorri , O. Mena , P. Serra This is my paper · ORCID
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Inflation predicts primordial scalar perturbations with a nearly scale-invariant spectrum and a spectral index approximately unity (the Harrison--Zel'dovich (HZ) spectrum). The first important step for inflationary cosmology is to check the consistency of the HZ primordial spectrum with current observations. Recent analyses have claimed that a HZ primordial spectrum is excluded at more than 99% c.l.. Here we show that the HZ spectrum is only marginally disfavored if one considers a more general reionization scenario. Data from the Planck mission will settle the issue.

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