Cosmic confusion and structure formation

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Abstract
We present a reanalysis of the cosmic confusion hypothesis, elucidating the degree to which "confusion" can be expected to hold in a class of flat, adiabatic models. This allows us to devise a simple and accurate fitting function for the height of the first peak in the radiation power spectrum in a wide range of inflationary-inspired models. The range preferred by current data is given, together with a discussion of the impact of measurements of the peak height on constraining models of structure formation.
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