Final published version
Research output: Contribution to Journal/Magazine › Review article › peer-review
Research output: Contribution to Journal/Magazine › Review article › peer-review
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TY - JOUR
T1 - Planck scale black hole dark matter from Higgs inflation
AU - Räsänen, Syksy
AU - Tomberg, Eemeli
PY - 2019/1/21
Y1 - 2019/1/21
N2 - 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).
AB - 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).
U2 - 10.1088/1475-7516/2019/01/038
DO - 10.1088/1475-7516/2019/01/038
M3 - Review article
AN - SCOPUS:85062278667
VL - 2019
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
SN - 1475-7516
IS - 1
M1 - 038
ER -