First Measurement of Electron Neutrino Appearance in NOvA

We report results from the first search for ν_{μ}→ν_{e} transitions by the NOvA experiment. In an exposure equivalent to 2.74×10^{20} 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...

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Veröffentlicht in:	Physical review letters 2016-04, Vol.116 (15), p.151806-151806, Article 151806
Hauptverfasser:	Adamson, P, Ader, C, Andrews, M, Anfimov, N, Anghel, I, Arms, K, Arrieta-Diaz, E, Aurisano, A, Ayres, D S, Backhouse, C, Baird, M, Bambah, B A, Bays, K, Bernstein, R, Betancourt, M, Bhatnagar, V, Bhuyan, B, Bian, J, Biery, K, Blackburn, T, Bocean, V, Bogert, D, Bolshakova, A, Bowden, M, Bower, C, Broemmelsiek, D, Bromberg, C, Brunetti, G, Bu, X, Butkevich, A, Capista, D, Catano-Mur, E, Chase, T R, Childress, S, Choudhary, B C, Chowdhury, B, Coan, T E, Coelho, J A B, Colo, M, Cooper, J, Corwin, L, Cronin-Hennessy, D, Cunningham, A, Davies, G S, Davies, J P, Del Tutto, M, Derwent, P F, Deepthi, K N, Demuth, D, Desai, S, Deuerling, G, Devan, A, Dey, J, Dharmapalan, R, Ding, P, Dixon, S, Djurcic, Z, Dukes, E C, Duyang, H, Ehrlich, R, Feldman, G J, Felt, N, Fenyves, E J, Flumerfelt, E, Foulkes, S, Frank, M J, Freeman, W, Gabrielyan, M, Gallagher, H R, Gebhard, M, Ghosh, T, Gilbert, W, Giri, A, Goadhouse, S, Gomes, R A, Goodenough, L, Goodman, M C, Grichine, V, Grossman, N, Group, R, Grudzinski, J, Guarino, V, Guo, B, Habig, A, Handler, T, Hartnell, J, Hatcher, R, Hatzikoutelis, A, Heller, K, Howcroft, C, Huang, J, Huang, X, Hylen, J, Ishitsuka, M, Jediny, F, Jensen, C, Jensen, D, Johnson, C, Jostlein, H, Kafka, G K
Format:	Artikel
Sprache:	eng
Schlagworte:	Detectors Equivalence Exposure Hierarchies INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY Neutrinos Nova PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Searching
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Zusammenfassung:	We report results from the first search for ν_{μ}→ν_{e} transitions by the NOvA experiment. In an exposure equivalent to 2.74×10^{20} 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
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.116.151806