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Published April 15, 2016 | Published
Journal Article Open

First Measurement of Electron Neutrino Appearance in NOvA

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.
Kamyshkov, Y.
Kasahara, S. M. S.
Kasetti, S.
Kephart, K.
Koizumi, G.
Kotelnikov, S.
Kourbanis, I.
Krahn, Z.
Kravtsov, V.
Kreymer, A.
Kulenberg, Ch.
Kumar, A.
Kutnink, T.
Kwarciancy, R.
Kwong, J.
Lang, K.
Lee, A.
Lee, W. M.
Lee, K.
Lein, S.
Liu, J.
Lokajicek, M.
Lozier, J.
Lu, Q.
Lucas, P.
Luchuk, S.
Lukens, P.
Lukhanin, G.
Magill, S.
Maan, K.
Mann, W. A.
Marshak, M. L.
Martens, M.
Martincik, J.
Mason, P.
Matera, K.
Mathis, M.
Matveev, V.
Mayer, N.
McCluskey, E.
Mehdiyev, R.
Merritt, H.
Messier, M. D.
Meyer, H.
Miao, T.
Michael, D.
Mikheyev, S. P.
Miller, W. H.
Mishra, S. R.
Mohanta, R.
Moren, A.
Mualem, L. ORCID icon
Muether, M.
Mufson, S.
Musser, J.
Newman, H. B. ORCID icon
Nelson, J. K.
Niner, E.
Norman, A.
Nowak, J.
Oksuzian, Y.
Olshevskiy, A.
Oliver, J.
Olson, T.
Paley, J.
Pandey, P.
Para, A.
Patterson, R. B. ORCID icon
Pawloski, G.
Pearson, N.
Perevalov, D.
Pershey, D.
Peterson, E.
Petti, R.
Phan-Budd, S.
Piccoli, L.
Pla-Dalmau, A.
Plunkett, R. K.
Poling, R.
Potukuchi, B.
Psihas, F.
Pushka, D.
Qiu, X.
Raddatz, N.
Radovic, A.
Rameika, R. A.
Ray, R.
Rebel, B.
Rechenmacher, R.
Reed, B.
Reilly, R.
Rocco, D.
Rodkin, D.
Ruddick, K.
Rusack, R.
Ryabov, V.
Sachdev, K.
Sahijpal, S.
Sahoo, H.
Samoylov, O.
Sanchez, M. C.
Saoulidou, N.
Schlabach, P.
Schneps, J.
Schroeter, R.
Sepulveda-Quiroz, J.
Shanahan, P.
Sherwood, B.
Sheshukov, A.
Singh, J.
Singh, V.
Smith, A.
Smith, D.
Smolik, J.
Solomey, N.
Sotnikov, A.
Sousa, A.
Soustruznik, K.
Stenkin, Y.
Strait, M.
Suter, L.
Talaga, R. L.
Tamsett, M. C.
Tariq, S.
Tas, P.
Tesarek, R. J.
Thayyullathil, R. B.
Thomsen, K.
Tian, X.
Tognini, S. C.
Toner, R.
Trevor, J.
Tzanakos, G.
Urheim, J.
Vahle, P.
Valerio, L.
Vinton, L.
Vrba, T.
Waldron, A. V.
Wang, B.
Wang, Z.
Weber, A.
Wehmann, A.
Whittington, D.
Wilcer, N.
Wildberger, R.
Wildman, D.
Williams, K.
Wojcicki, S. G.
Wood, K.
Xiao, M.
Xin, T.
Yadav, N.
Yang, S.
Zadorozhnyy, S.
Zalesak, J.
Zamorano, B.
Zhao, A.
Zirnstein, J.
Zwaska, R.
NOνA Collaboration

Abstract

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 < δ_(CP) < 0.5π in the inverted mass hierarchy at the 90% C.L.

Additional Information

© 2016 American Physical Society. Received 19 January 2016. This work was supported by the U.S. Department of Energy; the U.S. National Science Foundation; the Department of Science and Technology, India; the European Research Council; the MSMT CR, Czech Republic; the RAS, RMES, and RFBR, Russia; CNPq and FAPEG, Brazil; and the State and University of Minnesota. We are grateful for the contributions of the staffs at the University of Minnesota module assembly facility and Ash River Laboratory, at the Argonne National Laboratory, and at Fermilab. Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. De-AC02-07CH11359 with the U.S. DOE.

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Published - PhysRevLett.116.151806.pdf

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