Searching for Afterglow: Light Dark Matter Boosted by Supernova Neutrinos
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| Main Authors: | , , , |
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| Format: | Preprint |
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2022
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| _version_ | 1866917655162650624 |
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| author | Lin, Yen-Hsun Wu, Wen-Hua Wu, Meng-Ru Wong, Henry Tsz-King |
| author_facet | Lin, Yen-Hsun Wu, Wen-Hua Wu, Meng-Ru Wong, Henry Tsz-King |
| contents | A novel analysis is performed, incorporating time-of-flight (TOF) information to study the interactions of dark matter (DM) with standard model particles. After supernova (SN) explosions, DM with mass $m_χ\lesssim\mathcal{O}({\rm MeV})$ in the halo can be boosted by SN neutrinos (SN$ν$) to relativistic speed. The SN$ν$ boosted DM (BDM) arrives on Earth with TOF which depends only on $m_χ$ and is independent of the cross section. These BDMs can interact with detector targets in low-background experiments and manifest as afterglow events after the arrival of SN$ν$. The characteristic TOF spectra of the BDM events can lead to large background suppression and unique determination of $m_χ$. New cross section constraints on $\sqrt{σ_{χe} σ_{χν}}$ are derived from SN1987a in the Large Magellanic Cloud with data from the Kamiokande and Super-Kamiokande experiments. Potential sensitivities for the next galactic SN with Hyper-Kamiokande are projected. This analysis extends the existing bounds on $\sqrt{σ_{χe}σ_{χν}}$ over a broad range of $r_χ=σ_{χν}/σ_{χe}$. In particular, the improvement is by 1-3 orders of magnitude for $m_χ<\mathcal{O}(100\,{\rm keV})$ for $σ_{χe}\simσ_{χν}$. Prospects of exploiting TOF information in other astrophysical systems to probe exotic physics with other DM candidates are discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2206_06864 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Searching for Afterglow: Light Dark Matter Boosted by Supernova Neutrinos Lin, Yen-Hsun Wu, Wen-Hua Wu, Meng-Ru Wong, Henry Tsz-King High Energy Physics - Phenomenology High Energy Astrophysical Phenomena A novel analysis is performed, incorporating time-of-flight (TOF) information to study the interactions of dark matter (DM) with standard model particles. After supernova (SN) explosions, DM with mass $m_χ\lesssim\mathcal{O}({\rm MeV})$ in the halo can be boosted by SN neutrinos (SN$ν$) to relativistic speed. The SN$ν$ boosted DM (BDM) arrives on Earth with TOF which depends only on $m_χ$ and is independent of the cross section. These BDMs can interact with detector targets in low-background experiments and manifest as afterglow events after the arrival of SN$ν$. The characteristic TOF spectra of the BDM events can lead to large background suppression and unique determination of $m_χ$. New cross section constraints on $\sqrt{σ_{χe} σ_{χν}}$ are derived from SN1987a in the Large Magellanic Cloud with data from the Kamiokande and Super-Kamiokande experiments. Potential sensitivities for the next galactic SN with Hyper-Kamiokande are projected. This analysis extends the existing bounds on $\sqrt{σ_{χe}σ_{χν}}$ over a broad range of $r_χ=σ_{χν}/σ_{χe}$. In particular, the improvement is by 1-3 orders of magnitude for $m_χ<\mathcal{O}(100\,{\rm keV})$ for $σ_{χe}\simσ_{χν}$. Prospects of exploiting TOF information in other astrophysical systems to probe exotic physics with other DM candidates are discussed. |
| title | Searching for Afterglow: Light Dark Matter Boosted by Supernova Neutrinos |
| topic | High Energy Physics - Phenomenology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2206.06864 |