%0 Journal Article
%T Primordial black holes and slow-roll violation
%A Motohashi, H.
%A Hu, W.
%J Physical Review D
%D 2017
%V 96
%N 6
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Motohashi+Hu2017
%O WOS:000409436800005
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3286), last updated on Wed, 20 Sep 2017 11:36:35 +0000
%X For primordial black holes (PBH) to be the dark matter in single-field inflation, the slow-roll approximation must be violated by at least O(1) in order to enhance the curvature power spectrum within the required number of e-folds between cosmic microwave background scales and PBH mass scales. Power spectrum predictions which rely on the inflaton remaining on the slow-roll attractor can fail dramatically leading to qualitatively incorrect conclusions in models like an inflection potential and misestimate the mass scale in a running mass model. We show that an optimized temporal evaluation of the Hubble slow-roll parameters to second order remains a good description for a wide range of PBH formation models where up to a 10(7) amplification of power occurs in 10 e-folds or more.
%R 10.1103/PhysRevD.96.063503
%U http://arxiv.org/abs/1706.06784
%U https://doi.org/10.1103/PhysRevD.96.063503
%P 063503-9pp