Search for sterile neutrinos with the Neutrino-4 experiment and measurement results
| العنوان: | Search for sterile neutrinos with the Neutrino-4 experiment and measurement results |
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| المؤلفون: | V. L. Golovtsov, R.M. Samoilov, A. V. Chernyj, A. L. Petelin, O. M. Zherebtsov, Vladimir V. Fedorov, M. O. Gromov, V. V. Afanasiev, A. L. Izhutov, A. A. Tuzov, A. K. Fomin, P. V. Neustroev, S. A. Sazontov, A. P. Serebrov, A. A. Gerasimov, V. G. Zinoviev, M. E. Zaytsev, M. E. Chaikovskii, S. S. Volkov, V. G. Ivochkin |
| المصدر: | Physical Review |
| بيانات النشر: | American Physical Society (APS), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Systematic error, Physics, Sterile neutrino, Particle physics, Center (category theory), Order (ring theory), High Energy Physics::Experiment, Statistical analysis, Neutrino |
| الوصف: | The experiment Neutrino-4 started in 2014 with a detector model and continued with a full-scale detector in 2016–2021. In this article, we describe all the steps of the preparatory work on this experiment. We present all results of the Neutrino-4 experiment with increased statistical accuracy provided to date. The experimental setup is constructed to measure the flux and spectrum of the reactor antineutrinos as a function of distance to the center of the active zone of the SM-3 reactor (Dimitrovgrad, Russia) in the range of 6–12 meters. Using all the collected data, we performed a model-independent analysis to determine the oscillation parameters Δm142 and sin22θ14. The method of coherent summation of measurement results allows us to directly demonstrate the oscillation effect. We present the analysis of possible systematic errors and the MC model of the experiment, which considers the possibility of the effect manifestation at the present precision level. As a result of the analysis, we can conclude that at currently available statistical accuracy, we observe the oscillations at the 2.9σ level with the parameters Δm142=(7.3±0.13st±1.16syst) eV2=(7.3±1.17) eV2 and sin22θ=0.36±0.12stat(2.9σ). Monte Carlo based statistical analysis gave an estimation of the confidence level at 2.7σ. We plan to improve the currently working experimental setup and create a completely new setup in order to increase the accuracy of the experiment by 3 times. We also provide a brief analysis of the general experimental situation in the search for sterile neutrinos. |
| تدمد: | 2470-0029 2470-0010 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b05eaca58e5fe92fc7cd999b5f12263 https://doi.org/10.1103/physrevd.104.032003 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....0b05eaca58e5fe92fc7cd999b5f12263 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24700029 24700010 |
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