Inflationary preheating and primordial black holes

Details Inflationary preheating and primordial black holes Inflationary preheating and primordial black holes

2000-08-31

arxiv.org/abs/hep-ph/0008328v2

Phys.Rev. D63 (2001) 123503

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 6 figures. Fig 6 is added to show the weak dependence of the mass variance on the initial condition

Scientific paper

10.1103/PhysRevD.63.123503

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.

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