Dark Matter Interpretation of the Super-Kamiokande Antineutrino Excess and Predictions for JUNO
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| Format: | Preprint |
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2026
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| _version_ | 1866910237070458880 |
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| author | Granelli, Alessandro Pascoli, Silvia Rosauro-Alcaraz, Salvador |
| author_facet | Granelli, Alessandro Pascoli, Silvia Rosauro-Alcaraz, Salvador |
| contents | Super-Kamiokande has reported a small excess of electron antineutrino events in the 20 MeV energy range, in the search for the diffuse supernova neutrino background. We interpret this signal as a possible indication of dark matter that annihilates dominantly into neutrinos, pointing to a thermal dark matter candidate with $s$-wave annihilation and with mass in the tens of MeV range. This mass scale naturally fits into rich dark sector extensions of the Standard Model. Neutrino experiments, including JUNO, will be able to test this hypothesis in the coming years. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_20162 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Dark Matter Interpretation of the Super-Kamiokande Antineutrino Excess and Predictions for JUNO Granelli, Alessandro Pascoli, Silvia Rosauro-Alcaraz, Salvador High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics Super-Kamiokande has reported a small excess of electron antineutrino events in the 20 MeV energy range, in the search for the diffuse supernova neutrino background. We interpret this signal as a possible indication of dark matter that annihilates dominantly into neutrinos, pointing to a thermal dark matter candidate with $s$-wave annihilation and with mass in the tens of MeV range. This mass scale naturally fits into rich dark sector extensions of the Standard Model. Neutrino experiments, including JUNO, will be able to test this hypothesis in the coming years. |
| title | Dark Matter Interpretation of the Super-Kamiokande Antineutrino Excess and Predictions for JUNO |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2605.20162 |