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First measurement of electron neutrino appearance in NOvA
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SYSNO ASEP 0470465 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title First measurement of electron neutrino appearance in NOvA Author(s) Adamson, P. (US)
Ader, C. (US)
Andrews, M. (US)
Lokajíček, Miloš (FZU-D) RID, ORCID
Zálešák, Jaroslav (FZU-D) RID, ORCIDNumber of authors 260 Article number 151806 Source Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 116, č. 15 (2016), 1-7Number of pages 7 s. Language eng - English Country US - United States Keywords mass: hierarchy ; background ; NOvA ; near detector ; far detector ; experimental results Subject RIV BF - Elementary Particles and High Energy Physics R&D Projects LG15047 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000373884500003 EID SCOPUS 84963813198 DOI 10.1103/PhysRevLett.116.151806 Annotation We report results from the first search for νμ→νe transitions by the NOvA experiment. In an exposure equivalent to 2.74×1020 protons on target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of 0.99±0.11(syst) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of 1.07±0.14(syst). The 3.3σ excess of events observed in the primary analysis disfavors 0.1π<δCP<0.5π in the inverted mass hierarchy at the 90% C.L.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2017
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