Particle production during inflation: A Bayesian analysis with CMB data from Planck 2018

Understand

A class of inflationary models that involve rapid bursts of particle productions predict observational signatures, such as bump-like features in the primordial scalar power spectrum.

• In this work, we analyze such models by comparing their predictions with the latest CMB data from Planck 2018.
• We consider two scenarios of particle production.
• The first one is a simple scenario consisting of a single burst of particle production during observable inflation.