Updating constraints on inflationary features in the primordial power spectrum with the Planck data

TL;DR

This paper uses Planck satellite data to investigate potential features in the primordial power spectrum, finding hints of features at specific angular scales that improve the fit over the standard model.

Contribution

It provides new constraints on inflationary features using the latest Planck data, identifying specific angular scales where features may exist.

Findings

Hints of features at multipoles 10< l <60 and 150< l < 300

Decrease in chi^2 by about 9 with features compared to vanilla LCDM

Supports the possibility of non-trivial inflationary dynamics

Abstract

We present new constraints on possible features in the primordial inflationary density perturbations power spectrum in light of the recent Cosmic Microwave Background Anisotropies measurements from the Planck satellite. We found that the Planck data hints for the presence of features in two different ranges of angular scales, corresponding to multipoles 10< l <60 and 150< l < 300, with a decrease in the best fit chi^2 value with respect to the featureless "vanilla" LCDM model of Delta chi^2 around 9 in both cases.