Primordial black hole formation via inverted bubble collapse
Abstract We propose a novel mechanism of primordial black hole (PBH) formation through inverted bubble collapse. In this scenario, bubbles nucleate sparsely in an incomplete first-order phase transition, such that they remain isolated and do not percolate or collide with each other due to the extrem...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-07-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP07(2025)065 |
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| _version_ | 1849334063247130624 |
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| author | Kai Murai Kodai Sakurai Fuminobu Takahashi |
| author_facet | Kai Murai Kodai Sakurai Fuminobu Takahashi |
| author_sort | Kai Murai |
| collection | DOAJ |
| description | Abstract We propose a novel mechanism of primordial black hole (PBH) formation through inverted bubble collapse. In this scenario, bubbles nucleate sparsely in an incomplete first-order phase transition, such that they remain isolated and do not percolate or collide with each other due to the extremely low nucleation rate. This is followed by a bulk phase transition in the rest of the universe that inverts these pre-existing bubbles into false vacuum regions. These spherically symmetric false-vacuum bubbles subsequently collapse to form PBHs. Unlike conventional PBH formation mechanisms associated with domain wall collapse or bubble coalescence, our inverted bubble collapse mechanism naturally ensures spherical collapse. We demonstrate that, when applied to the singlet extension of the Standard Model, this mechanism can produce highly monochromatic PBHs with masses up to O $$ \mathcal{O} $$ (10−7 – 10−5)M ⊙, which potentially explain the microlensing events observed in the OGLE and Subaru HSC data. |
| format | Article |
| id | doaj-art-06dcd9a180ef42168047348fffa24d14 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-06dcd9a180ef42168047348fffa24d142025-08-20T03:45:40ZengSpringerOpenJournal of High Energy Physics1029-84792025-07-012025712110.1007/JHEP07(2025)065Primordial black hole formation via inverted bubble collapseKai Murai0Kodai Sakurai1Fuminobu Takahashi2Department of Physics, Tohoku UniversityDepartment of Physics, Tohoku UniversityDepartment of Physics, Tohoku UniversityAbstract We propose a novel mechanism of primordial black hole (PBH) formation through inverted bubble collapse. In this scenario, bubbles nucleate sparsely in an incomplete first-order phase transition, such that they remain isolated and do not percolate or collide with each other due to the extremely low nucleation rate. This is followed by a bulk phase transition in the rest of the universe that inverts these pre-existing bubbles into false vacuum regions. These spherically symmetric false-vacuum bubbles subsequently collapse to form PBHs. Unlike conventional PBH formation mechanisms associated with domain wall collapse or bubble coalescence, our inverted bubble collapse mechanism naturally ensures spherical collapse. We demonstrate that, when applied to the singlet extension of the Standard Model, this mechanism can produce highly monochromatic PBHs with masses up to O $$ \mathcal{O} $$ (10−7 – 10−5)M ⊙, which potentially explain the microlensing events observed in the OGLE and Subaru HSC data.https://doi.org/10.1007/JHEP07(2025)065Black HolesCosmology of Theories BSMPhase Transitions in the Early Universe |
| spellingShingle | Kai Murai Kodai Sakurai Fuminobu Takahashi Primordial black hole formation via inverted bubble collapse Journal of High Energy Physics Black Holes Cosmology of Theories BSM Phase Transitions in the Early Universe |
| title | Primordial black hole formation via inverted bubble collapse |
| title_full | Primordial black hole formation via inverted bubble collapse |
| title_fullStr | Primordial black hole formation via inverted bubble collapse |
| title_full_unstemmed | Primordial black hole formation via inverted bubble collapse |
| title_short | Primordial black hole formation via inverted bubble collapse |
| title_sort | primordial black hole formation via inverted bubble collapse |
| topic | Black Holes Cosmology of Theories BSM Phase Transitions in the Early Universe |
| url | https://doi.org/10.1007/JHEP07(2025)065 |
| work_keys_str_mv | AT kaimurai primordialblackholeformationviainvertedbubblecollapse AT kodaisakurai primordialblackholeformationviainvertedbubblecollapse AT fuminobutakahashi primordialblackholeformationviainvertedbubblecollapse |