Inflation model constraints from data released in 2015

TL;DR

This paper analyzes recent cosmological data to constrain inflation models, finding that some models are disfavored while others fit the data well, refining our understanding of early universe inflation.

Contribution

It provides updated constraints on inflation models using the latest CMB and BAO data, highlighting which models are compatible with observations.

Findings

Convex potential inflation models are disfavored.

Monomial and natural inflation models are marginally disfavored.

Brane and Starobinsky inflation models fit the data well.

Abstract

We provide the latest constraints on the power spectra of both scalar and tensor perturbations from the CMB data (including \textit{Planck}~2015, BICEP2 \& \textit{Keck Array} experiments) and the new BAO scales from SDSS-III BOSS observation. We find that the inflation model with a convex potential is not favored and both the inflation model with a monomial potential and the natural inflation model are marginally disfavored at around $95\%$ confidence level. But both the Brane inflation model and the Starobinsky inflation model fit the data quite well.