Dark Matter-Induced Nuclear De-Excitation at SBND with Ab Initio Nuclear Theory
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arXiv
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| Format: | Preprint |
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2026
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| author | Dutta, Bhaskar Goswami, Debopam Hu, Baishan Huang, Wei-Chih Pandey, Vishvas |
| author_facet | Dutta, Bhaskar Goswami, Debopam Hu, Baishan Huang, Wei-Chih Pandey, Vishvas |
| contents | We explore the sensitivity of the Short-Baseline Near Detector (SBND) experiment to light dark matter using MeV-scale electromagnetic activity. Inelastic scattering of dark matter with argon nuclei can excite nuclear states that subsequently de-excite via the emission of MeV-scale photons, producing localized low-energy "blip" signatures in a liquid argon time projection chamber. We perform state-of-the-art ab initio nuclear calculations, including all relevant argon excited states with energies up to 18 MeV, to provide reliable predictions for these signals. After accounting for relevant backgrounds, we find that SBND can probe previously unexplored regions of parameter space for light dark matter. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2602_02817 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Dark Matter-Induced Nuclear De-Excitation at SBND with Ab Initio Nuclear Theory Dutta, Bhaskar Goswami, Debopam Hu, Baishan Huang, Wei-Chih Pandey, Vishvas High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment Nuclear Theory We explore the sensitivity of the Short-Baseline Near Detector (SBND) experiment to light dark matter using MeV-scale electromagnetic activity. Inelastic scattering of dark matter with argon nuclei can excite nuclear states that subsequently de-excite via the emission of MeV-scale photons, producing localized low-energy "blip" signatures in a liquid argon time projection chamber. We perform state-of-the-art ab initio nuclear calculations, including all relevant argon excited states with energies up to 18 MeV, to provide reliable predictions for these signals. After accounting for relevant backgrounds, we find that SBND can probe previously unexplored regions of parameter space for light dark matter. |
| title | Dark Matter-Induced Nuclear De-Excitation at SBND with Ab Initio Nuclear Theory |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2602.02817 |