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Methods and Stability Tests Associated with the Sterile Neutrino Search Using Improved High-Energy Ν_μ Event Reconstruction in IceCube

PHYSICAL REVIEW D(2024)

University of Canterbury Dept. of Physics and Astronomy | University of Wisconsin-Madison Dept. of Physics and Wisconsin IceCube Particle Astrophysics Center | Université Libre de Bruxelles | Niels Bohr Institute | TU Dortmund University Dept. of Physics | University of Delaware Bartol Research Institute and Dept. of Physics and Astronomy | Marquette University Department of Physics | Harvard University Department of Physics | RWTH Aachen University III. Physikalisches Institut | University of California Dept. of Physics and Astronomy | Technische Universität München Physik-department | University of California Dept. of Physics | Ohio State University Dept. of Physics and Center for Cosmology and Astro-Particle Physics | Loyola University Chicago Department of Physics | Fakultät für Physik & Astronomie | University of Maryland Dept. of Physics | University of Kansas Dept. of Physics and Astronomy | Karlsruhe Institute of Technology Institute for Astroparticle Physics | University of Mainz Institute of Physics | Georgia Institute of Technology School of Physics and Center for Relativistic Astrophysics | University of Adelaide Department of Physics | University of Nevada Nevada Center for Astrophysics | Massachusetts Institute of Technology Dept. of Physics | Vrije Universiteit Brussel (VUB) | Université catholique de Louvain Centre for Cosmology | Westfälische Wilhelms-Universität Münster Institut für Kernphysik | Erlangen Centre for Astroparticle Physics | Karlsruhe Institute of Technology Institute of Experimental Particle Physics | Chiba University Dept. of Physics | Southern University Dept. of Physics | Institut für Physik | University of Wisconsin-Madison Dept. of Astronomy | Lawrence Berkeley National Laboratory | Michigan State University Dept. of Physics and Astronomy | Queen's University Engineering Physics | Clark-Atlanta University CTSPS | University of Texas at Arlington Dept. of Physics | University of Alberta Dept. of Physics | Lawrence Berkeley National Laboratory Dept. of Physics | Université de Genève | Yale University Dept. of Physics | Mercer University Department of Physics | University of Gent Dept. of Physics and Astronomy | University of Alaska Anchorage Dept. of Physics and Astronomy

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Abstract
We provide supporting details for the search for a 3 +1 sterile neutrino using data collected over 10.7 years at the IceCube Neutrino Observatory. The analysis uses atmospheric muon-flavored neutrinos from 0.5 to 100 TeV that traverse Earth to reach the IceCube detector and finds a best-fit point at sin(2)(2 theta(24)) = 0.16 and Delta m(41)(2) = 3.5 eV(2) with a goodness-of-fit p value of 12% and consistency with the null hypothesis of no oscillations to sterile neutrinos with a p value of 3.1%. Several improvements were made over past analyses, which are reviewed in this article, including upgrades to the reconstruction and the study of sources of systematic uncertainty. We provide details of the fit quality and discuss stability tests that split the data for separate samples, comparing results. We find that the fits are consistent between split datasets.
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要点】:本文通过改进高能μ子事件重建方法,在IceCube中微子天文台11年数据中寻找3+1 sterile neutrino,发现最佳拟合点并进行了稳定性测试。

方法】:研究采用0.5至100 TeV的大气μ子味中微子数据,通过穿越地球到达IceCube探测器,并对重建方法和系统不确定性进行了改进。

实验】:使用IceCube探测器数据,通过数据分割进行稳定性测试,结果在分割数据集之间保持一致。