Two-dimensional models of core-collapse supernova explosions assisted by heavy sterile neutrinos
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866910486816096256 |
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| author | Mori, Kanji Takiwaki, Tomoya Kotake, Kei Horiuchi, Shunsaku |
| author_facet | Mori, Kanji Takiwaki, Tomoya Kotake, Kei Horiuchi, Shunsaku |
| contents | Core-collapse supernovae can be a copious source of sterile neutrinos, hypothetical particles that mix with active neutrinos. We develop two-dimensional stellar core-collapse models that incorporate the mixing between tau neutrinos and heavy sterile neutrinos -- those with the mass of 150--200 MeV -- to investigate signatures of sterile neutrinos in supernova observables. We find that the decay channel of a sterile neutrino into a pion and a tau neutrino can enhance the explosion energy and the synthesized nickel mass. Although the inclusion of sterile neutrinos considered in this study slightly reduce the neutrino and gravitational-wave signals, we find that they are still detectable for a Galactic event. Furthermore, we point out that if sterile neutrinos are as massive as ~200 MeV, they produce high-energy tau antineutrinos with energies of ~80 MeV, the detection of which can be a smoking signature of the sterile neutrinos and where Hyper-Kamiokande should play a pivotal role. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_14333 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Two-dimensional models of core-collapse supernova explosions assisted by heavy sterile neutrinos Mori, Kanji Takiwaki, Tomoya Kotake, Kei Horiuchi, Shunsaku High Energy Astrophysical Phenomena High Energy Physics - Phenomenology Core-collapse supernovae can be a copious source of sterile neutrinos, hypothetical particles that mix with active neutrinos. We develop two-dimensional stellar core-collapse models that incorporate the mixing between tau neutrinos and heavy sterile neutrinos -- those with the mass of 150--200 MeV -- to investigate signatures of sterile neutrinos in supernova observables. We find that the decay channel of a sterile neutrino into a pion and a tau neutrino can enhance the explosion energy and the synthesized nickel mass. Although the inclusion of sterile neutrinos considered in this study slightly reduce the neutrino and gravitational-wave signals, we find that they are still detectable for a Galactic event. Furthermore, we point out that if sterile neutrinos are as massive as ~200 MeV, they produce high-energy tau antineutrinos with energies of ~80 MeV, the detection of which can be a smoking signature of the sterile neutrinos and where Hyper-Kamiokande should play a pivotal role. |
| title | Two-dimensional models of core-collapse supernova explosions assisted by heavy sterile neutrinos |
| topic | High Energy Astrophysical Phenomena High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2402.14333 |