Inflationary preheating and primordial black holes
Abstract
Preheating after inflation may over-produce primordial black holes (PBH's) in many regions of parameter space. As an example we study two-field models with a massless self-interacting inflaton, taking into account second order field and metric backreaction effects as spatial averages. We find that a complex quilt of parameter regions above the Gaussian PBH over-production threshold emerges due to the enhancement of curvature perturbations on all scales. It should be possible to constrain realistic models of inflation through PBH over-production although many issues, such as rescattering and non-Gaussianity, remain unsolved or unexplored.
Keywords
Cite
@article{arxiv.hep-ph/0008328,
title = {Inflationary preheating and primordial black holes},
author = {Bruce A. Bassett and Shinji Tsujikawa},
journal= {arXiv preprint arXiv:hep-ph/0008328},
year = {2009}
}
Comments
7 pages, 6 figures. Fig 6 is added to show the weak dependence of the mass variance on the initial condition