Slow-rolling down the curvature: a reassessment of the Planck constraints on ${\varphi }^2$ inflation in a closed universe

Enrico Specogna, Tatevik Vardanyan, William Giarè +1

We revisit the Cosmic Microwave Background (CMB) constraints on the spatial curvature of the Universe, assessing how they change when the curvature parameter and the primordial inf…