Probing Dark Sector Particles Coupling to Neutrinos with Double Beta Decay
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917455821012992 |
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| author | Boudjema, Noor-Ines Deppisch, Frank F. Herrero-Brocal, Antonio Majumdar, Chayan Senapati, Supriya |
| author_facet | Boudjema, Noor-Ines Deppisch, Frank F. Herrero-Brocal, Antonio Majumdar, Chayan Senapati, Supriya |
| contents | Motivated by the observation of non-zero neutrino masses and the potential for discovering physics beyond the Standard Model, numerous experiments are actively searching for neutrinoless double beta $(0νββ)$ decay. In all of these searches, a substantial amount of data on two-neutrino double beta $(2νββ)$ decay has been collected. In this work, we explore the sensitivity of current and future double beta decay experiments to a massive Majoron-like scalar particle coupled to neutrinos and potentially dark sector fermions, and compare their reach to the relevant cosmological constraints. On- and off-shell production of such a scalar leads to characteristic distortions in the emitted electron spectrum. We investigate how these distortions manifest in current and future double beta decay experiments, deriving the sensitivity to such a scenario. We project the reach of future experiments which can probe scalar-neutrino couplings of $|a_ν| \approx 2\times 10^{-6}$ for sub-MeV scalar particles and remain sensitive to off-shell production above the Q-value of double beta isotopes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_13606 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing Dark Sector Particles Coupling to Neutrinos with Double Beta Decay Boudjema, Noor-Ines Deppisch, Frank F. Herrero-Brocal, Antonio Majumdar, Chayan Senapati, Supriya High Energy Physics - Phenomenology Motivated by the observation of non-zero neutrino masses and the potential for discovering physics beyond the Standard Model, numerous experiments are actively searching for neutrinoless double beta $(0νββ)$ decay. In all of these searches, a substantial amount of data on two-neutrino double beta $(2νββ)$ decay has been collected. In this work, we explore the sensitivity of current and future double beta decay experiments to a massive Majoron-like scalar particle coupled to neutrinos and potentially dark sector fermions, and compare their reach to the relevant cosmological constraints. On- and off-shell production of such a scalar leads to characteristic distortions in the emitted electron spectrum. We investigate how these distortions manifest in current and future double beta decay experiments, deriving the sensitivity to such a scenario. We project the reach of future experiments which can probe scalar-neutrino couplings of $|a_ν| \approx 2\times 10^{-6}$ for sub-MeV scalar particles and remain sensitive to off-shell production above the Q-value of double beta isotopes. |
| title | Probing Dark Sector Particles Coupling to Neutrinos with Double Beta Decay |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.13606 |