Speaker
Mathias Pierre
(T (Phenomenology))
Description
A phase of ultra slow-roll during inflation, characterized by a transient decrease in the inflaton field velocity, is known to generate large curvature perturbations on small scales that could later seed the formation of a significant population of primordial black holes. In this talk, we discuss how non-Gaussianities can arise from the non-linear relation between curvature perturbations and inflaton fluctuations and from the intrinsic non-Gaussianities of the latter, which stem from its self interactions. We discuss a numerical approach to estimate the impact of such non-Gaussianities on the tail of the probability distribution function of curvature perturbations.
Primary author
Mathias Pierre
(T (Phenomenology))
