Guardado en:
| Autores principales: | , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2512.14271 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866915678989058048 |
|---|---|
| author | Asai, Kento Enomoto, Seishi Hirose, Takuya Yamanaka, Masato |
| author_facet | Asai, Kento Enomoto, Seishi Hirose, Takuya Yamanaka, Masato |
| contents | We study cosmological constraints on the asymmetric mediator scenario, a variant of the scotogenic model that addresses the origins of neutrino masses, dark matter (DM), and the baryon asymmetry. An SU(2)$_L$ doublet scalar $η$ mediates between the visible and dark sectors, while a singlet scalar $σ$ serves as the DM candidate. We evaluate the DM relic abundance by solving the Boltzmann equations including $η$ decay and scattering processes prior to the freeze-out of the $η$ asymmetry, and show Big Bang nucleosynthesis constraints from late-time $η$ decays. Combining the DM abundance and BBN bounds, we find the favored parameter space of this model, for instance, the mediator masses of $m_η\lesssim \mathcal{O}(10)$ TeV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_14271 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cosmological Bounds on Scotogenic Model with Asymmetric Mediator Asai, Kento Enomoto, Seishi Hirose, Takuya Yamanaka, Masato High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics We study cosmological constraints on the asymmetric mediator scenario, a variant of the scotogenic model that addresses the origins of neutrino masses, dark matter (DM), and the baryon asymmetry. An SU(2)$_L$ doublet scalar $η$ mediates between the visible and dark sectors, while a singlet scalar $σ$ serves as the DM candidate. We evaluate the DM relic abundance by solving the Boltzmann equations including $η$ decay and scattering processes prior to the freeze-out of the $η$ asymmetry, and show Big Bang nucleosynthesis constraints from late-time $η$ decays. Combining the DM abundance and BBN bounds, we find the favored parameter space of this model, for instance, the mediator masses of $m_η\lesssim \mathcal{O}(10)$ TeV. |
| title | Cosmological Bounds on Scotogenic Model with Asymmetric Mediator |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2512.14271 |