Probing Sub-MeV Dark Matter with Neutron-Capture $γ$ Spectroscopy
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866915895281975296 |
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| author | Meirose, B. Milstead, D. |
| author_facet | Meirose, B. Milstead, D. |
| contents | We present a general, discovery-grade framework for searching for weakly coupled new particles emitted in nuclear de-excitation following neutron capture. Rather than relying on isolated spectral features, the method exploits correlated ``satellite-line combs'': multiple weak $γ$-ray lines appearing at a common energy offset $Δ$ below known capture transitions. By combining likelihood information across many parent lines and multiple target nuclei, the approach strongly suppresses nuclear-structure ambiguities and instrumental artifacts. We also discuss optimal target selection and practical experimental implementation with high-resolution HPGe detectors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_26472 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Probing Sub-MeV Dark Matter with Neutron-Capture $γ$ Spectroscopy Meirose, B. Milstead, D. Nuclear Experiment High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Theory We present a general, discovery-grade framework for searching for weakly coupled new particles emitted in nuclear de-excitation following neutron capture. Rather than relying on isolated spectral features, the method exploits correlated ``satellite-line combs'': multiple weak $γ$-ray lines appearing at a common energy offset $Δ$ below known capture transitions. By combining likelihood information across many parent lines and multiple target nuclei, the approach strongly suppresses nuclear-structure ambiguities and instrumental artifacts. We also discuss optimal target selection and practical experimental implementation with high-resolution HPGe detectors. |
| title | Probing Sub-MeV Dark Matter with Neutron-Capture $γ$ Spectroscopy |
| topic | Nuclear Experiment High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2603.26472 |