Primordial Black Hole Sterile Neutrinogenesis: Sterile Neutrino Dark Matter Production Independent of Couplings
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arXiv
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866917737773662208 |
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| author | Chen, Muping Gelmini, Graciela B. Lu, Philip Takhistov, Volodymyr |
| author_facet | Chen, Muping Gelmini, Graciela B. Lu, Philip Takhistov, Volodymyr |
| contents | Sterile neutrinos ($ν_s$s) are well-motivated and actively searched for hypothetical neutral particles that would mix with the Standard Model active neutrinos. They are considered prime warm dark matter (DM) candidates, typically when their mass is in the keV range, although they can also be hot or cold DM components. We discuss in detail the characteristics and phenomenology of $ν_s$s that minimally couple only to active neutrinos and are produced in the evaporation of early Universe primordial black holes (PBHs), a process we called "PBH sterile neutrinogenesis". Contrary to the previously studied $ν_s$ production mechanisms, this novel mechanism does not depend on the active-sterile mixing. The resulting $ν_s$s have a distinctive spectrum and are produced with larger energies than in typical scenarios. This characteristic enables $ν_s$s to be WDM in the unusual $0.3$ MeV to $0.3$ TeV mass range, if PBHs do not matter-dominate the Universe before evaporating. When PBHs matter-dominate before evaporating, the possible coincidence of induced gravitational waves associated with PBH evaporation and astrophysical X-ray observations from $ν_s$ decays constitutes a distinct signature of our scenario. constitutes a distinct signature of our scenario. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_12136 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Primordial Black Hole Sterile Neutrinogenesis: Sterile Neutrino Dark Matter Production Independent of Couplings Chen, Muping Gelmini, Graciela B. Lu, Philip Takhistov, Volodymyr High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena Sterile neutrinos ($ν_s$s) are well-motivated and actively searched for hypothetical neutral particles that would mix with the Standard Model active neutrinos. They are considered prime warm dark matter (DM) candidates, typically when their mass is in the keV range, although they can also be hot or cold DM components. We discuss in detail the characteristics and phenomenology of $ν_s$s that minimally couple only to active neutrinos and are produced in the evaporation of early Universe primordial black holes (PBHs), a process we called "PBH sterile neutrinogenesis". Contrary to the previously studied $ν_s$ production mechanisms, this novel mechanism does not depend on the active-sterile mixing. The resulting $ν_s$s have a distinctive spectrum and are produced with larger energies than in typical scenarios. This characteristic enables $ν_s$s to be WDM in the unusual $0.3$ MeV to $0.3$ TeV mass range, if PBHs do not matter-dominate the Universe before evaporating. When PBHs matter-dominate before evaporating, the possible coincidence of induced gravitational waves associated with PBH evaporation and astrophysical X-ray observations from $ν_s$ decays constitutes a distinct signature of our scenario. constitutes a distinct signature of our scenario. |
| title | Primordial Black Hole Sterile Neutrinogenesis: Sterile Neutrino Dark Matter Production Independent of Couplings |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2312.12136 |