학술논문

First measurement of electron neutrino appearance in NOvA
Document Type
Working Paper
Author
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.Muether, M.Mufson, S.Musser, J.Newman, H. B.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.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.
Source
Phys. Rev. Lett. 116, 151806 (2016)
Subject
High Energy Physics - Experiment
Physics - Instrumentation and Detectors
Language
Abstract
We report results from the first search for $\nu_\mu\to\nu_e$ transitions by the NOvA experiment. In an exposure equivalent to $2.74\times10^{20}$ protons-on-target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of $0.99\pm0.11$ (syst.) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of $1.07\pm0.14$ (syst.). The $3.3\sigma$ excess of events observed in the primary analysis disfavors $0.1\pi < \delta_{CP} < 0.5\pi$ in the inverted mass hierarchy at the 90% C.L.
Comment: 7 pages, 4 figures. Minor updates to match version accepted by journal