When inverse seesaw meets inverse electroweak phase transition: a novel path to leptogenesis
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917293047414784 |
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| author | Ai, Wen-Yuan Huang, Peisi Xie, Ke-Pan |
| author_facet | Ai, Wen-Yuan Huang, Peisi Xie, Ke-Pan |
| contents | We propose a new nonthermal leptogenesis mechanism triggered by the cosmic first-order phase transition. The Standard Model is extended with two generations of TeV-scale vectorlike leptons. The lighter generation gives rise to an inverse electroweak phase transition of the Higgs field at $T\sim200~{\rm GeV}$, restoring the symmetry, and resulting in relativistic bubble expansion in the space. The heavier generation is responsible for neutrino masses via the inverse seesaw mechanism. The interaction between bubble walls and particles in the plasma abundantly produces the vectorlike leptons, and they subsequently undergo CP-violating decay to generate the baryon asymmetry. This mechanism is testable at current and future particle experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_09000 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | When inverse seesaw meets inverse electroweak phase transition: a novel path to leptogenesis Ai, Wen-Yuan Huang, Peisi Xie, Ke-Pan High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics We propose a new nonthermal leptogenesis mechanism triggered by the cosmic first-order phase transition. The Standard Model is extended with two generations of TeV-scale vectorlike leptons. The lighter generation gives rise to an inverse electroweak phase transition of the Higgs field at $T\sim200~{\rm GeV}$, restoring the symmetry, and resulting in relativistic bubble expansion in the space. The heavier generation is responsible for neutrino masses via the inverse seesaw mechanism. The interaction between bubble walls and particles in the plasma abundantly produces the vectorlike leptons, and they subsequently undergo CP-violating decay to generate the baryon asymmetry. This mechanism is testable at current and future particle experiments. |
| title | When inverse seesaw meets inverse electroweak phase transition: a novel path to leptogenesis |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2510.09000 |