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Search for active-sterile neutrino mixing using neutral-current interactions in NOvA
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SYSNO ASEP 0484248 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Search for active-sterile neutrino mixing using neutral-current interactions in NOvA Author(s) Adamson, P. (US)
Aliaga, L. (US)
Ambrose, D. (US)
Lokajíček, Miloš (FZU-D) RID, ORCID
Zálešák, Jaroslav (FZU-D) RID, ORCIDNumber of authors 180 Article number 072006 Source Title Physical Review D. - : American Physical Society - ISSN 2470-0010
Roč. 96, č. 7 (2017), s. 1-9Number of pages 9 s. Language eng - English Country US - United States Keywords NOvA ; Fermilab ; mass difference ; near detector ; far detector ; mixing angle ; neutrino ; oscillation ; experimental results Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LM2015068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LG15047 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000413899100001 EID SCOPUS 85033584507 DOI 10.1103/PhysRevD.96.072006 Annotation We report results from the first search for sterile neutrinos mixing with active neutrinos through a reduction in the rate of neutral-current interactions over a baseline of 810 km between the NOvA detectors. Analyzing a 14-kton detector equivalent exposure of 6.05×1020 protons-on-target in the NuMI beam at Fermilab, we observe 95 neutral-current candidates at the Far Detector compared with 83.5±9.7(stat)±9.4(syst) events predicted assuming mixing only occurs between active neutrino species. No evidence for νμ→νs transitions is found. Interpreting these results within a 3+1 model, we place constraints on the mixing angles θ24<20.8° and θ34<31.2° at the 90% C.L. for 0.05 eV2≤Δm412≤0.5 eV2, the range of mass splittings that produce no significant oscillations over the Near Detector baseline.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
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