Ultralight dark matter in long-baseline accelerator neutrino oscillations
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| author | Li, Xin-Qiang Lin, Hai-Xing Tang, Jian Vihonen, Sampsa |
| author_facet | Li, Xin-Qiang Lin, Hai-Xing Tang, Jian Vihonen, Sampsa |
| contents | We present a systematic study of the ultralight dark matter (ULDM) effects on neutrino oscillations using the latest long-baseline data from the T2K and NO$ν$A experiments. Our analysis covers both flavor-universal and flavor-general scalar interactions, as well as vector interactions associated with the $L_e - L_μ$ and $L_μ- L_τ$ gauge symmetries. Importantly, we explicitly consider the coherence properties of the ULDM by incorporating the resulting stochastic fluctuations into our statistical analysis. We find that in the low-mass regime, $m_ϕ\lesssim 10^{-17}$ eV, where stochastic effects are maximal, constraints on the ULDM couplings are relaxed by roughly an order of magnitude compared to those in the high-mass regime, $m_ϕ\gtrsim 10^{-15}$ eV, where such fluctuations are effectively averaged out. While the combined T2K and NO$ν$A datasets impose nontrivial exclusion limits on the ULDM interactions, we find no statistically significant evidence that these effects alleviate the current tension in determining the CP-violating phase $δ_{CP}$ between the two experiments. It will be, therefore, essential for future high-precision facilities to further probe the ULDM scenarios and achieve a definite measurement of $δ_{CP}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_11704 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Ultralight dark matter in long-baseline accelerator neutrino oscillations Li, Xin-Qiang Lin, Hai-Xing Tang, Jian Vihonen, Sampsa High Energy Physics - Phenomenology High Energy Physics - Experiment We present a systematic study of the ultralight dark matter (ULDM) effects on neutrino oscillations using the latest long-baseline data from the T2K and NO$ν$A experiments. Our analysis covers both flavor-universal and flavor-general scalar interactions, as well as vector interactions associated with the $L_e - L_μ$ and $L_μ- L_τ$ gauge symmetries. Importantly, we explicitly consider the coherence properties of the ULDM by incorporating the resulting stochastic fluctuations into our statistical analysis. We find that in the low-mass regime, $m_ϕ\lesssim 10^{-17}$ eV, where stochastic effects are maximal, constraints on the ULDM couplings are relaxed by roughly an order of magnitude compared to those in the high-mass regime, $m_ϕ\gtrsim 10^{-15}$ eV, where such fluctuations are effectively averaged out. While the combined T2K and NO$ν$A datasets impose nontrivial exclusion limits on the ULDM interactions, we find no statistically significant evidence that these effects alleviate the current tension in determining the CP-violating phase $δ_{CP}$ between the two experiments. It will be, therefore, essential for future high-precision facilities to further probe the ULDM scenarios and achieve a definite measurement of $δ_{CP}$. |
| title | Ultralight dark matter in long-baseline accelerator neutrino oscillations |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2312.11704 |