Measurement of the Neutrino Mixing Angle θ_{23} in NOvA.

Citation data:

Physical review letters, ISSN: 1079-7114, Vol: 118, Issue: 15, Page: 151802

Publication Year:
2017
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PMID:
28452513
DOI:
10.1103/physrevlett.118.151802
Author(s):
Adamson, P, Aliaga, L, Ambrose, D, Anfimov, N, Antoshkin, A, Arrieta-Diaz, E, Augsten, K, Aurisano, A, Backhouse, C, Baird, M, Bambah, B A, Bays, K, Behera, B, Bending, S, Bernstein, R, Bhatnagar, V, Bhuyan, B, Bian, J, Blackburn, T, Bolshakova, A, Bromberg, C, Brown, J, Brunetti, G, Buchanan, N, Butkevich, A, Bychkov, V, Campbell, M, Catano-Mur, E, Childress, S, Choudhary, B C, Chowdhury, B, Coan, T E, Coelho, J A B, Colo, M, Cooper, J, Corwin, L, Cremonesi, L, Cronin-Hennessy, D, Davies, G S, Davies, J P, Derwent, P F, Desai, S, Dharmapalan, R, Ding, P, Djurcic, Z, Dukes, E C, Duyang, H, Edayath, S, Ehrlich, R, Feldman, G J, Frank, M J, Gabrielyan, M, Gallagher, H R, Germani, S, Ghosh, T, Giri, A, Gomes, R A, Goodman, M C, Grichine, V, Group, R, Grover, D, Guo, B, Habig, A, Hartnell, J, Hatcher, R, Hatzikoutelis, A, Heller, K, Himmel, A, Holin, A, Hylen, J, Jediny, F, Judah, M, Kafka, G K, Kalra, D, Kasahara, S M S, Kasetti, S, Keloth, R, Kolupaeva, L, Kotelnikov, S, Kourbanis, I, Kreymer, A, Kumar, A, Kurbanov, S, Lang, K, Lee, W M, Lin, S, Liu, J, Lokajicek, M, Lozier, J, Luchuk, S, Maan, K, Magill, S, Mann, W A, Marshak, M L, Matera, K, Matveev, V, Méndez, D P, Messier, M D, Meyer, H, Miao, T, Miller, W H, Mishra, S R, Mohanta, R, Moren, A, Mualem, L, Muether, M, Mufson, S, Murphy, R, Musser, J, Nelson, J K, Nichol, R, Niner, E, Norman, A, Nosek, T, Oksuzian, Y, Olshevskiy, A, Olson, T, Paley, J, Pandey, P, Patterson, R B, Pawloski, G, Pershey, D, Petrova, O, Petti, R, Phan-Budd, S, Plunkett, R K, Poling, R, Potukuchi, B, Principato, C, Psihas, F, Radovic, A, Rameika, R A, Rebel, B, Reed, B, Rocco, D, Rojas, P, Ryabov, V, Sachdev, K, Sail, P, Samoylov, O, Sanchez, M C, Schroeter, R, Sepulveda-Quiroz, J, Shanahan, P, Sheshukov, A, Singh, J, Singh, P, Singh, V, Smolik, J, Solomey, N, Song, E, Sousa, A, Soustruznik, K, Strait, M, Suter, L, Talaga, R L, Tamsett, M C, Tas, P, Thayyullathil, R B, Thomas, J, Tian, X, Tognini, S C, Tripathi, J, Tsaris, A, Urheim, J, Vahle, P, Vasel, J, Vinton, L, Vold, A, Vrba, T, Wang, B, Wetstein, M, Whittington, D, Wojcicki, S G, Wolcott, J, Yadav, N, Yang, S, Zalesak, J, Zamorano, B, Zwaska, R, NOvA Collaboration Show More Hide
Publisher(s):
American Physical Society (APS)
Tags:
Physics and Astronomy
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article description
This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of 6.05×10^{20} protons on target from the NuMI beam at the Fermi National Accelerator Laboratory. The measurement probes the muon-tau symmetry hypothesis that requires maximal θ_{23} mixing (θ_{23}=π/4). Assuming the normal mass hierarchy, we find Δm_{32}^{2}=(2.67±0.11)×10^{-3}  eV^{2} and sin^{2}θ_{23} at the two statistically degenerate values 0.404_{-0.022}^{+0.030} and 0.624_{-0.030}^{+0.022}, both at the 68% confidence level. Our data disfavor the maximal mixing scenario with 2.6σ significance.

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