First measurement of electron neutrino appearance in NOvA

Blackburn, T, Davies, J P, Tamsett, M C, Hartnell, J, Zamorano, B, Vinton, L, Waldron, A V and The NOvA collaboration, (2016) First measurement of electron neutrino appearance in NOvA. Physical Review Letters, 116 (15). 151806 1-7. ISSN 0031-9007

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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.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Richard Chambers
Date Deposited: 06 May 2016 11:29
Last Modified: 02 Mar 2021 16:16

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Project NameSussex Project NumberFunderFunder Ref
Probing Fundamental Physics with Antineutrinos at the NOvA ExperimentG0949EUROPEAN UNION307395