Primordial Black Holes from First-Order Cosmological Phase Transitions
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2021
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| _version_ | 1866909741145391104 |
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| author | Baker, Michael J. Breitbach, Moritz Kopp, Joachim Mittnacht, Lukas |
| author_facet | Baker, Michael J. Breitbach, Moritz Kopp, Joachim Mittnacht, Lukas |
| contents | We discuss the possibility of forming primordial black holes during a first-order phase transition in the early Universe. As is well known, such a phase transition proceeds through the formation of true-vacuum bubbles in a Universe that is still in a false vacuum. When there is a particle species whose mass increases significantly during the phase transition, transmission of the corresponding particles through the advancing bubble walls is suppressed. Consequently, an overdensity can build up in front of the walls and become sufficiently large to trigger primordial black hole formation. We track this process quantitatively by solving a Boltzmann equation, and we delineate the phase transition properties required for our mechanism to yield an appreciable abundance of primordial black holes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2105_07481 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Primordial Black Holes from First-Order Cosmological Phase Transitions Baker, Michael J. Breitbach, Moritz Kopp, Joachim Mittnacht, Lukas Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology We discuss the possibility of forming primordial black holes during a first-order phase transition in the early Universe. As is well known, such a phase transition proceeds through the formation of true-vacuum bubbles in a Universe that is still in a false vacuum. When there is a particle species whose mass increases significantly during the phase transition, transmission of the corresponding particles through the advancing bubble walls is suppressed. Consequently, an overdensity can build up in front of the walls and become sufficiently large to trigger primordial black hole formation. We track this process quantitatively by solving a Boltzmann equation, and we delineate the phase transition properties required for our mechanism to yield an appreciable abundance of primordial black holes. |
| title | Primordial Black Holes from First-Order Cosmological Phase Transitions |
| topic | Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2105.07481 |