NS1 - Observational Constraints on the Micro and Macroscopic Properties of Compact Stars |
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Speaker |
Motohashi, Hayato |
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Coauthors |
Motohashi, Hayato; Hu, Wayne |
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Primordial Black Holes and Slow-Roll Violation |
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Abstract |
We show that for primordial black holes (PBHs) 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 10^7 amplification of power occurs in 10 efolds or more. ----- References: Motohashi, Hu, Phys.Rev. D 92, 043501 (2015), [arXiv:1503.04810]. Motohashi, Hu, Phys.Rev. D 96, 023502 (2017), [arXiv:1704.01128]. Motohashi, Hu, Phys.Rev. D 96, 063503 (2017), [arXiv:1706.06784]. |
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