Primordial black hole production during preheating in a chaotic inflationary model

TL;DR

This paper reviews the formation of primordial black holes during preheating after chaotic inflation, using numerical simulations to explore their production and potential observational constraints.

Contribution

It provides a numerical analysis of PBH production during preheating in a chaotic inflationary model, highlighting the sensitivity to smoothing scales and observational constraints.

Findings

PBH production can be a generic outcome of the model

Results are sensitive to the smoothing scale used

Constraints on overproduction relate to inflation-preheating models and observations

Abstract

In this paper we review the production of primordial black holes (PBHs) during preheating after a chaotic inflationary model. All relevant equations of motion are solved numerically in a modified version of HLattice, and we then calculate the mass variance to determine structure formation during preheating. It is found that production of PBHs can be a generic result of the model, even though the results seem to be sensitive to the values of the smoothing scale. We consider a constraint for overproduction of PBHs that could uncover some stress between inflation-preheating models and observations.