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Title: Primordial black holes and slow-roll violation

Abstract

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 efolds between CMB 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 107 amplification of power occurs in 10 e-folds or more.

Authors:
 [1];  [2]
  1. Univ. de Valencia-CSIC, Valencia (Spain)
  2. Univ. of Chicago, IL (United States)
Publication Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1595681
Alternate Identifier(s):
OSTI ID: 1378825
Grant/Contract Number:  
SC0009924; NASA ATP NNX15AK22G; FG02-13ER41958; FPA2014-57816-P
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 6; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Motohashi, Hayato, and Hu, Wayne. Primordial black holes and slow-roll violation. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.063503.
Motohashi, Hayato, & Hu, Wayne. Primordial black holes and slow-roll violation. United States. doi:10.1103/PhysRevD.96.063503.
Motohashi, Hayato, and Hu, Wayne. Wed . "Primordial black holes and slow-roll violation". United States. doi:10.1103/PhysRevD.96.063503. https://www.osti.gov/servlets/purl/1595681.
@article{osti_1595681,
title = {Primordial black holes and slow-roll violation},
author = {Motohashi, Hayato and Hu, Wayne},
abstractNote = {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 efolds between CMB 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 107 amplification of power occurs in 10 e-folds or more.},
doi = {10.1103/PhysRevD.96.063503},
journal = {Physical Review D},
number = 6,
volume = 96,
place = {United States},
year = {2017},
month = {9}
}

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Cited by: 38 works
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