Towards a Robust Exclusion of the Sterile-Neutrino Explanation of Short-Baseline Anomalies
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2025
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| author | Rodrigues, Ohana Benevides Hostert, Matheus Kelly, Kevin J. Littlejohn, Bryce Machado, Pedro A. N. Safa, Ibrahim Zhou, Tao |
| author_facet | Rodrigues, Ohana Benevides Hostert, Matheus Kelly, Kevin J. Littlejohn, Bryce Machado, Pedro A. N. Safa, Ibrahim Zhou, Tao |
| contents | The sterile neutrino interpretation of the LSND and MiniBooNE neutrino anomalies is currently being tested at three Liquid Argon detectors: MicroBooNE, SBND, and ICARUS. It has been argued that a degeneracy between $ν_μ\to ν_e$ and $ν_e \to ν_e$ oscillations significantly degrades their sensitivity to sterile neutrinos. Through an independent study, we show two methods to eliminate this concern. First, we resolve this degeneracy by including external constraints on $ν_e$ disappearance from the PROSPECT reactor experiment. Second, by properly analyzing the full three-dimensional parameter space, we demonstrate that the stronger-than-sensitivity exclusion from MicroBooNE alone already covers the entire 2$σ$ preferred regions of MiniBooNE at the level of $2-3σ$. We show that upcoming searches at SBND and ICARUS can improve on this beyond the $4σ$ level, thereby providing a rigorous test of short-baseline anomalies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_13594 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Towards a Robust Exclusion of the Sterile-Neutrino Explanation of Short-Baseline Anomalies Rodrigues, Ohana Benevides Hostert, Matheus Kelly, Kevin J. Littlejohn, Bryce Machado, Pedro A. N. Safa, Ibrahim Zhou, Tao High Energy Physics - Phenomenology High Energy Physics - Experiment The sterile neutrino interpretation of the LSND and MiniBooNE neutrino anomalies is currently being tested at three Liquid Argon detectors: MicroBooNE, SBND, and ICARUS. It has been argued that a degeneracy between $ν_μ\to ν_e$ and $ν_e \to ν_e$ oscillations significantly degrades their sensitivity to sterile neutrinos. Through an independent study, we show two methods to eliminate this concern. First, we resolve this degeneracy by including external constraints on $ν_e$ disappearance from the PROSPECT reactor experiment. Second, by properly analyzing the full three-dimensional parameter space, we demonstrate that the stronger-than-sensitivity exclusion from MicroBooNE alone already covers the entire 2$σ$ preferred regions of MiniBooNE at the level of $2-3σ$. We show that upcoming searches at SBND and ICARUS can improve on this beyond the $4σ$ level, thereby providing a rigorous test of short-baseline anomalies. |
| title | Towards a Robust Exclusion of the Sterile-Neutrino Explanation of Short-Baseline Anomalies |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2503.13594 |