Light Scalar Fields Foster Production of Primordial Black Holes
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912333590167552 |
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| author | Lorenzoni, Dario L. Geller, Sarah R. Ireland, Zachary Kaiser, David I. McDonough, Evan Wittmeier, Kyle A. |
| author_facet | Lorenzoni, Dario L. Geller, Sarah R. Ireland, Zachary Kaiser, David I. McDonough, Evan Wittmeier, Kyle A. |
| contents | Scalar fields are ubiquitous in theories of high-energy physics. In the context of cosmic inflation, this suggests the existence of spectator fields, which provide a subdominant source of energy density. We show that spectator fields boost the inflationary production of primordial black holes, with single-field ultra-slow roll evolution supplanted by a phase of evolution along the spectator direction, and primordial perturbations amplified by the resulting multifield dynamics. This generic mechanism is largely free from the severe fine-tuning that afflicts single-field inflationary PBH models. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_13251 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Light Scalar Fields Foster Production of Primordial Black Holes Lorenzoni, Dario L. Geller, Sarah R. Ireland, Zachary Kaiser, David I. McDonough, Evan Wittmeier, Kyle A. Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory Scalar fields are ubiquitous in theories of high-energy physics. In the context of cosmic inflation, this suggests the existence of spectator fields, which provide a subdominant source of energy density. We show that spectator fields boost the inflationary production of primordial black holes, with single-field ultra-slow roll evolution supplanted by a phase of evolution along the spectator direction, and primordial perturbations amplified by the resulting multifield dynamics. This generic mechanism is largely free from the severe fine-tuning that afflicts single-field inflationary PBH models. |
| title | Light Scalar Fields Foster Production of Primordial Black Holes |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2504.13251 |