Primordial Dirac Leptogenesis
Fuente:
arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | |
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| _version_ | 1866911250935447552 |
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| author | Ahmed, Aqeel Garcés, Juan P. Lindner, Manfred |
| author_facet | Ahmed, Aqeel Garcés, Juan P. Lindner, Manfred |
| contents | We present a novel realization of Dirac leptogenesis based on the post-inflationary reheating phase of the early universe. An asymmetry generated within the scalar sector via CP-violating and out-of-equilibrium inflaton decays is transferred to chiral neutrinos through Yukawa interactions and then to baryons via electroweak sphalerons. We describe in detail a minimal realization of this mechanism that naturally accommodates small neutrino Yukawa couplings and results in contributions to the effective number of relativistic species, $N_{\text{eff}}$, testable in upcoming cosmological observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_03794 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Primordial Dirac Leptogenesis Ahmed, Aqeel Garcés, Juan P. Lindner, Manfred High Energy Physics - Phenomenology We present a novel realization of Dirac leptogenesis based on the post-inflationary reheating phase of the early universe. An asymmetry generated within the scalar sector via CP-violating and out-of-equilibrium inflaton decays is transferred to chiral neutrinos through Yukawa interactions and then to baryons via electroweak sphalerons. We describe in detail a minimal realization of this mechanism that naturally accommodates small neutrino Yukawa couplings and results in contributions to the effective number of relativistic species, $N_{\text{eff}}$, testable in upcoming cosmological observations. |
| title | Primordial Dirac Leptogenesis |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.03794 |