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The shape of the primordial power spectrum: A last stand before Planck data

The shape of the primordial power spectrum: A last stand before Planck data

We present a minimally-parametric reconstruction of the primordial power spectrum using the most recent cosmic microwave background and large scale structure data sets. Our goal is to constrain the shape of the power spectrum while simultaneously avoiding strong theoretical priors and over-fitting of the data. We find no evidence for …