Planck scale black hole dark matter from Higgs inflation

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http://hdl.handle.net/10138/310141

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Räsänen , S & Tomberg , E 2019 , ' Planck scale black hole dark matter from Higgs inflation ' , Journal of Cosmology and Astroparticle Physics , vol. 2019 , no. 1 , 038 . https://doi.org/10.1088/1475-7516/2019/01/038

Title: Planck scale black hole dark matter from Higgs inflation
Author: Räsänen, Syksy; Tomberg, Eemeli
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2019-01-21
Language: eng
Number of pages: 36
Belongs to series: Journal of Cosmology and Astroparticle Physics
ISSN: 1475-7516
URI: http://hdl.handle.net/10138/310141
Abstract: We study the production of primordial black hole (PBH) dark matter in the case when the Standard Model Higgs coupled non-minimally to gravity is the inflaton. PBHs can be produced if the Higgs potential has a near-critical point due to quantum corrections. In this case the slow-roll approximation may be broken, so we calculate the power spectrum numerically. We consider both the metric and the Palatini formulation of general relativity. Combining observational constraints on PBHs and on the CMB spectrum we find that PBHs can constitute all of the dark matter only if they evaporate early and leave behind Planck mass relics. This requires the potential to have a shallow local minimum, not just a critical point. The initial PBH mass is then below 10(6) g, and predictions for the CMB observables are the same as in tree-level Higgs inflation, n(s) = 0.96 and r = 5 x 10(-3) (metric) or r = 4 x 10(-8) ... 2 x 10(-7) (Palatini).
Subject: dark matter theory
inflation
particle physics
cosmology connection
GR black holes
PALATINI VARIATIONAL PRINCIPLE
EXTENDED INFLATION
INITIAL CONDITIONS
PERTURBATIONS
RELICS
BOSON
CONSTRAINTS
EINSTEIN
GRAVITY
JORDAN
115 Astronomy, Space science
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