Primordial black holes from local features of the inflaton potential
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910516086046720 |
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| author | Cadavid, Alexander Gallego Romano, Antonio Enea |
| author_facet | Cadavid, Alexander Gallego Romano, Antonio Enea |
| contents | Primordial black holes (PBH) can form in the early Universe from peaks of the primordial curvature perturbations. The statistics of the peaks determines the abundance of PBHs, and is related to the amplitude of the primordial curvature spectrum. We study single field inflationary models with local features of the inflaton potential which induce a growth of curvature perturbations on super-horizon scales, which can increase the spectrum, and consequently the predicted PBHs abundance. We compute the effects of the different parameters of the features on the PBHs abundance, giving some example of models compatible with observational constraints. The mechanism is general, and can induce the PBH production in diffent mass ranges by appropriately tuning the parameters, and we give a specific example producing PBHs with abundance compatible with asteroid mass constraints. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_05109 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Primordial black holes from local features of the inflaton potential Cadavid, Alexander Gallego Romano, Antonio Enea Cosmology and Nongalactic Astrophysics Primordial black holes (PBH) can form in the early Universe from peaks of the primordial curvature perturbations. The statistics of the peaks determines the abundance of PBHs, and is related to the amplitude of the primordial curvature spectrum. We study single field inflationary models with local features of the inflaton potential which induce a growth of curvature perturbations on super-horizon scales, which can increase the spectrum, and consequently the predicted PBHs abundance. We compute the effects of the different parameters of the features on the PBHs abundance, giving some example of models compatible with observational constraints. The mechanism is general, and can induce the PBH production in diffent mass ranges by appropriately tuning the parameters, and we give a specific example producing PBHs with abundance compatible with asteroid mass constraints. |
| title | Primordial black holes from local features of the inflaton potential |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2407.05109 |