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arXiv:1601.05022hep-ex

First measurement of electron neutrino appearance in NOvA

P. Adamson, C. Ader, M. Andrews, N. Anfimov, I. Anghel, K. Arms, E. Arrieta-Diaz, A. Aurisano, D. S. Ayres, C. Backhouse, M. Baird, B. A. Bambah, K. Bays, R. Bernstein, M. Betancourt, V. Bhatnagar, B. Bhuyan, J. Bian, K. Biery, T. Blackburn, V. Bocean, D. Bogert, A. Bolshakova, M. Bowden, C. Bower, D. Broemmelsiek, C. Bromberg, G. Brunetti, X. Bu, A. Butkevich, D. Capista, E. Catano-Mur, T. R. Chase, S. Childress, B. C. Choudhary, B. Chowdhury, T. E. Coan, J. A. B. Coelho, M. Colo, J. Cooper, L. Corwin, D. Cronin-Hennessy, A. Cunningham, G. S. Davies, J. P. Davies, M. Del Tutto, P. F. Derwent, K. N. Deepthi, D. Demuth, S. Desai, G. Deuerling, A. Devan, J. Dey, R. Dharmapalan, P. Ding, S. Dixon, Z. Djurcic, E. C. Dukes, H. Duyang, R. Ehrlich, G. J. Feldman, N. Felt, E. J. Fenyves, E. Flumerfelt, S. Foulkes, M. J. Frank, W. Freeman, M. Gabrielyan, H. R. Gallagher, M. Gebhard, T. Ghosh, W. Gilbert, A. Giri, S. Goadhouse, R. A. Gomes, L. Goodenough, M. C. Goodman, V. Grichine, N. Grossman, R. Group, J. Grudzinski, V. Guarino, B. Guo, A. Habig, T. Handler, J. Hartnell, R. Hatcher, A. Hatzikoutelis, K. Heller, C. Howcroft, J. Huang, X. Huang, J. Hylen, M. Ishitsuka, F. Jediny, C. Jensen, D. Jensen, C. Johnson, H. Jostlein, G. K. Kafka, Y. Kamyshkov, S. M. S. Kasahara, S. Kasetti, K. Kephart, G. Koizumi, S. Kotelnikov, I. Kourbanis, Z. Krahn, V. Kravtsov, A. Kreymer, Ch. Kulenberg, A. Kumar, T. Kutnink, R. Kwarciancy, J. Kwong, K. Lang, A. Lee, W. M. Lee, K. Lee, S. Lein, J. Liu, M. Lokajicek, J. Lozier, Q. Lu, P. Lucas, S. Luchuk, P. Lukens, G. Lukhanin, S. Magill, K. Maan, W. A. Mann, M. L. Marshak, M. Martens, J. Martincik, P. Mason, K. Matera, M. Mathis, V. Matveev, N. Mayer, E. McCluskey, R. Mehdiyev, H. Merritt, M. D. Messier, H. Meyer, T. Miao, D. Michael, S. P. Mikheyev, W. H. Miller, S. R. Mishra, R. Mohanta, A. Moren, L. Mualem, M. Muether, S. Mufson, J. Musser, H. B. Newman, J. K. Nelson, E. Niner, A. Norman, J. Nowak, Y. Oksuzian, A. Olshevskiy, J. Oliver, T. Olson, J. Paley, P. Pandey, A. Para, R. B. Patterson, G. Pawloski, N. Pearson, D. Perevalov, D. Pershey, E. Peterson, R. Petti, S. Phan-Budd, L. Piccoli, A. Pla-Dalmau, R. K. Plunkett, R. Poling, B. Potukuchi, F. Psihas, D. Pushka, X. Qiu, N. Raddatz, A. Radovic, R. A. Rameika, R. Ray, B. Rebel, R. Rechenmacher, B. Reed, R. Reilly, D. Rocco, D. Rodkin, K. Ruddick, R. Rusack, V. Ryabov, K. Sachdev, S. Sahijpal, H. Sahoo, O. Samoylov, M. C. Sanchez, N. Saoulidou, P. Schlabach, J. Schneps, R. Schroeter, J. Sepulveda-Quiroz, P. Shanahan, B. Sherwood, A. Sheshukov, J. Singh, V. Singh, A. Smith, D. Smith, J. Smolik, N. Solomey, A. Sotnikov, A. Sousa, K. Soustruznik, Y. Stenkin, M. Strait, L. Suter, R. L. Talaga, M. C. Tamsett, S. Tariq, P. Tas, R. J. Tesarek, R. B. Thayyullathil, K. Thomsen, X. Tian, S. C. Tognini, R. Toner, J. Trevor, G. Tzanakos, J. Urheim, P. Vahle, L. Valerio, L. Vinton, T. Vrba, A. V. Waldron, B. Wang, Z. Wang, A. Weber, A. Wehmann, D. Whittington, N. Wilcer, R. Wildberger, D. Wildman, K. Williams, S. G. Wojcicki, K. Wood, M. Xiao, T. Xin, N. Yadav, S. Yang, S. Zadorozhnyy, J. Zalesak, B. Zamorano, A. Zhao, J. Zirnstein, R. Zwaska

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Abstract

We report results from the first search for $ν_μ\toν_e$ 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 $3.3σ$ 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.

arXiv comments
7 pages, 4 figures. Minor updates to match version accepted by journal
Journal reference
Phys. Rev. Lett. 116, 151806 (2016)
DOI
doi:10.1103/PhysRevLett.116.151806
Subjects
hep-exHigh Energy Physics, Experiment physics.ins-detInstrumentation and Detectors

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    • How much earth? Quoting https://www.worldscientific.com/doi/abs/10.1142/S02177323125... from 2012 > We report on the performance of a low-rate communications link established using the NuMI beam line and the MINERvA detector at Fermilab. The link achieved a decoded data rate of…

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