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, GaryFelt, NathanFenyves, 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, Gareth KristopherKamyshkov, 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.Muether, M.Mufson, S.Musser, J.Newman, H. B.Nelson, J. K.Niner, E.Norman, A.Nowak, J.Oksuzian, Y.Olshevskiy, A.Oliver, JohnOlson, T.Paley, J.Pandey, P.Para, A.Patterson, R. B.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, RaphaelSepulveda-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, RuthTrevor, 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.2022-12-212016Adamson, P., C. Ader, M. Andrews, N. Anfimov, I. Anghel, K. Arms, E. Arrieta-Diaz, et al. 2016. “First Measurement of Electron Neutrino Appearance in NOvA.” Physical Review Letters 116 (15) (April 13). doi:10.1103/physrevlett.116.151806. http://dx.doi.org/10.1103/PhysRevLett.116.151806.0031-9007https://nrs.harvard.edu/URN-3:HUL.INSTREPOS:37373916We 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.en-USneutrino: oscillationneutrino/mu: beamneutrino/e: particle identificationneutrino: mixing angleneutrino: mass differencemass: hierarchybackgroundNOvAnear detectorfar detectorexperimental resultsJournal Article2022-12-2110.1103/PhysRevLett.116.151806