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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2404.14485 |
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| _version_ | 1866911978832789504 |
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| author | Ray, Anupam Qian, Yong-Zhong |
| author_facet | Ray, Anupam Qian, Yong-Zhong |
| contents | We study $ν_μ$-$ν_s$ and $\barν_μ$-$\barν_s$ mixing in the protoneutron star (PNS) created in a core-collapse supernova (CCSN). We point out the importance of the feedback on the general composition of the PNS in addition to the obvious feedback on the $ν_μ$ lepton number. We show that for our adopted mixing parameters $δm^2\sim 10^2$~keV$^2$ and $\sin^2 2θ$ consistent with the current constraints, sterile neutrino production is dominated by the Mikheyev-Smirnov-Wolfenstein conversion of $\barν_μ$ into $\barν_s$ and that the subsequent escape of $\barν_s$ increases the $ν_μ$ lepton number, which in turn enhances muonization of the PNS primarily through $ν_μ+n\to p+μ^-$. While these results are qualitatively robust, their quantitative effects on the dynamics and active neutrino emission of CCSNe should be evaluated by including $ν_μ$-$ν_s$ and $\barν_μ$-$\barν_s$ mixing in the simulations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_14485 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Enhanced Muonization by Active-Sterile Neutrino Mixing in Protoneutron Stars Ray, Anupam Qian, Yong-Zhong High Energy Physics - Phenomenology High Energy Astrophysical Phenomena We study $ν_μ$-$ν_s$ and $\barν_μ$-$\barν_s$ mixing in the protoneutron star (PNS) created in a core-collapse supernova (CCSN). We point out the importance of the feedback on the general composition of the PNS in addition to the obvious feedback on the $ν_μ$ lepton number. We show that for our adopted mixing parameters $δm^2\sim 10^2$~keV$^2$ and $\sin^2 2θ$ consistent with the current constraints, sterile neutrino production is dominated by the Mikheyev-Smirnov-Wolfenstein conversion of $\barν_μ$ into $\barν_s$ and that the subsequent escape of $\barν_s$ increases the $ν_μ$ lepton number, which in turn enhances muonization of the PNS primarily through $ν_μ+n\to p+μ^-$. While these results are qualitatively robust, their quantitative effects on the dynamics and active neutrino emission of CCSNe should be evaluated by including $ν_μ$-$ν_s$ and $\barν_μ$-$\barν_s$ mixing in the simulations. |
| title | Enhanced Muonization by Active-Sterile Neutrino Mixing in Protoneutron Stars |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2404.14485 |