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First Measurement of Electron Neutrino Appearance in NOvA

Adamson, P. and Ader, C. and Andrews, M. and Anfimov, N. and Anghel, I. and Arms, K. and Arrieta-Diaz, E. and Aurisano, A. and Ayres, D. S. and Backhouse, C. and Baird, M. and Bambah, B. A. and Bays, K. and Bernstein, R. and Betancourt, M. and Bhatnagar, V. and Bhuyan, B. and Bian, J. and Biery, K. and Blackburn, T. and Bocean, V. and Bogert, D. and Bolshakova, A. and Bowden, M. and Bower, C. and Broemmelsiek, D. and Bromberg, C. and Brunetti, G. and Bu, X. and Butkevich, A. and Capista, D. and Catano-Mur, E. and Chase, T. R. and Childress, S. and Choudhary, B. C. and Chowdhury, B. and Coan, T. E. and Coelho, J. A. B. and Colo, M. and Cooper, J. and Corwin, L. and Cronin-Hennessy, D. and Cunningham, A. and Davies, G. S. and Davies, J. P. and Del Tutto, M. and Derwent, P. F. and Deepthi, K. N. and Demuth, D. and Desai, S. and Deuerling, G. and Devan, A. and Dey, J. and Dharmapalan, R. and Ding, P. and Dixon, S. and Djurcic, Z. and Dukes, E. C. and Duyang, H. and Ehrlich, R. and Feldman, G. J. and Felt, N. and Fenyves, E. J. and Flumerfelt, E. and Foulkes, S. and Frank, M. J. and Freeman, W. and Gabrielyan, M. and Gallagher, H. R. and Gebhard, M. and Ghosh, T. and Gilbert, W. and Giri, A. and Goadhouse, S. and Gomes, R. A. and Goodenough, L. and Goodman, M. C. and Grichine, V. and Grossman, N. and Group, R. and Grudzinski, J. and Guarino, V. and Guo, B. and Habig, A. and Handler, T. and Hartnell, J. and Hatcher, R. and Hatzikoutelis, A. and Heller, K. and Howcroft, C. and Huang, J. and Huang, X. and Hylen, J. and Ishitsuka, M. and Jediny, F. and Jensen, C. and Jensen, D. and Johnson, C. and Jostlein, H. and Kafka, G. K. and Kamyshkov, Y. and Kasahara, S. M. S. and Kasetti, S. and Kephart, K. and Koizumi, G. and Kotelnikov, S. and Kourbanis, I. and Krahn, Z. and Kravtsov, V. and Kreymer, A. and Kulenberg, Ch. and Kumar, A. and Kutnink, T. and Kwarciancy, R. and Kwong, J. and Lang, K. and Lee, A. and Lee, W. M. and Lee, K. and Lein, S. and Liu, J. and Lokajicek, M. and Lozier, J. and Lu, Q. and Lucas, P. and Luchuk, S. and Lukens, P. and Lukhanin, G. and Magill, S. and Maan, K. and Mann, W. A. and Marshak, M. L. and Martens, M. and Martincik, J. and Mason, P. and Matera, K. and Mathis, M. and Matveev, V. and Mayer, N. and McCluskey, E. and Mehdiyev, R. and Merritt, H. and Messier, M. D. and Meyer, H. and Miao, T. and Michael, D. and Mikheyev, S. P. and Miller, W. H. and Mishra, S. R. and Mohanta, R. and Moren, A. and Mualem, L. and Muether, M. and Mufson, S. and Musser, J. and Newman, H. B. and Nelson, J. K. and Niner, E. and Norman, A. and Nowak, J. and Oksuzian, Y. and Olshevskiy, A. and Oliver, J. and Olson, T. and Paley, J. and Pandey, P. and Para, A. and Patterson, R. B. and Pawloski, G. and Pearson, N. and Perevalov, D. and Pershey, D. and Peterson, E. and Petti, R. and Phan-Budd, S. and Piccoli, L. and Pla-Dalmau, A. and Plunkett, R. K. and Poling, R. and Potukuchi, B. and Psihas, F. and Pushka, D. and Qiu, X. and Raddatz, N. and Radovic, A. and Rameika, R. A. and Ray, R. and Rebel, B. and Rechenmacher, R. and Reed, B. and Reilly, R. and Rocco, D. and Rodkin, D. and Ruddick, K. and Rusack, R. and Ryabov, V. and Sachdev, K. and Sahijpal, S. and Sahoo, H. and Samoylov, O. and Sanchez, M. C. and Saoulidou, N. and Schlabach, P. and Schneps, J. and Schroeter, R. and Sepulveda-Quiroz, J. and Shanahan, P. and Sherwood, B. and Sheshukov, A. and Singh, J. and Singh, V. and Smith, A. and Smith, D. and Smolik, J. and Solomey, N. and Sotnikov, A. and Sousa, A. and Soustruznik, K. and Stenkin, Y. and Strait, M. and Suter, L. and Talaga, R. L. and Tamsett, M. C. and Tariq, S. and Tas, P. and Tesarek, R. J. and Thayyullathil, R. B. and Thomsen, K. and Tian, X. and Tognini, S. C. and Toner, R. and Trevor, J. and Tzanakos, G. and Urheim, J. and Vahle, P. and Valerio, L. and Vinton, L. and Vrba, T. and Waldron, A. V. and Wang, B. and Wang, Z. and Weber, A. and Wehmann, A. and Whittington, D. and Wilcer, N. and Wildberger, R. and Wildman, D. and Williams, K. and Wojcicki, S. G. and Wood, K. and Xiao, M. and Xin, T. and Yadav, N. and Yang, S. and Zadorozhnyy, S. and Zalesak, J. and Zamorano, B. and Zhao, A. and Zirnstein, J. and Zwaska, R. (2016) First Measurement of Electron Neutrino Appearance in NOvA. Physical Review Letters, 116 (15). Art. No. 151806. ISSN 0031-9007.

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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.

Item Type:Article
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Newman, H. B.0000-0003-0964-1480
Patterson, R. B.0000-0002-5787-9517
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.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-07CH11359
Department of Science and Technology of IndiaUNSPECIFIED
European Research Council (ERC)UNSPECIFIED
Ministerstvo školství, mládeže a tělovýchovy České republiky (MŠMT)UNSPECIFIED
Russian Academy of SciencesUNSPECIFIED
Ministry of Education and Science of the Russian Federation UNSPECIFIED
Russian Foundation for Basic ResearchUNSPECIFIED
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de Goiás (FAPEG)UNSPECIFIED
State of MinnesotaUNSPECIFIED
University of MinnesotaUNSPECIFIED
Record Number:CaltechAUTHORS:20160413-193733873
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Official Citation:First Measurement of Electron Neutrino Appearance in NOvA P. Adamson et al. (NOvA Collaboration) Phys. Rev. Lett. 116, 151806 – Published 13 April 2016
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:66137
Deposited By: George Porter
Deposited On:14 Apr 2016 03:44
Last Modified:11 Oct 2017 22:15

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