Planck scale black hole dark matter from Higgs inflation

Räsänen, Syksy and Tomberg, Eemeli (2019) Planck scale black hole dark matter from Higgs inflation. Journal of Cosmology and Astroparticle Physics, 2019 (1): 038. ISSN 1475-7516

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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=5×10 -3 (metric) or r=4× 10 -8 2 × 10 -7 (Palatini).

Item Type:
Journal Article
Journal or Publication Title:
Journal of Cosmology and Astroparticle Physics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3103
Subjects:
?? astronomy and astrophysics ??
ID Code:
211969
Deposited By:
Deposited On:
02 Jan 2024 09:30
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Jul 2024 00:41