Reactor ν̅ [subscript e] disappearance in the Double Chooz experiment

Abe, Y.; Aberle, C.; dos Anjos, J.; Barriere, J.; Bergevin, M.; Bernstein, A.; Bezerra, T.; Bezrukhov, L.; Blucher, E.; Bowden, N.; Buck, C.; Busenitz, J.; Cabrera, A.; Caden, E.; Camilleri, L.; Carr, R.; Cerrada, M.; Chang, P.-J.; Chimenti, P.; Classen, T.; Collin, A.; Conover, E.; Conrad, J.; Crespo-Anadón, J.; Crum, K.; Cucoanes, A.; D’Agostino, M.; Damon, E.; Dawson, J.; Dazeley, S.; Dietrich, D.; Djurcic, Z.; Dracos, M.; Durand, V.; Ebert, J.; Efremenko, Y.; Elnimr, M.; Etenko, A.; Fallot, M.; Fechner, M.; von Feilitzsch, F.; Felde, J.; Franco, D.; Franke, A.; Franke, M.; Furuta, H.; Gama, R.; Gil-Botella, I.; Giot, L.; Göger-Neff, M.; Gonzalez, L.; Goodman, M.; Goon, J.; Greiner, D.; Haag, N.; Hagner, C.; Hara, T.; Hartmann, F.; Haser, J.; Hatzikoutelis, A.; Hayakawa, T.; Hofmann, M.; Horton-Smith, G.; Hourlier, A.; Ishitsuka, M.; Jochum, J.; Jollet, C.; Jones, C.; Kaether, F.; Kalousis, L.; Kamyshkov, Y.; Kaplan, D.; Kawasaki, T.; Keefer, G.; Kemp, E.; de Kerret, H.; Kibe, Y.; Konno, T.; Kryn, D.; Kuze, M.; Lachenmaier, T.; Lane, C.; Langbrandtner, C.; Lasserre, T.; Letourneau, A.; Lhuillier, D.; Lima, H.; Lindner, M.; López-Castanõ, J.; LoSecco, J.; Lubsandorzhiev, B.; Lucht, S.; McKee, D.; Maeda, J.; Maesano, C.; Mariani, C.; Maricic, J.; Martino, J.; Matsubara, T.; Mention, G.; Meregaglia, A.; Miletic, T.; Milincic, R.; Miyata, H.; Mueller, Th.; Nagasaka, Y.; Nakajima, K.; Novella, P.; Obolensky, M.; Oberauer, L.; Onillon, A.; Osborn, A.; Ostrovskiy, I.; Palomares, C.; Pepe, I.; Perasso, S.; Perrin, P.; Pfahler, P.; Porta, A.; Potzel, W.; Reichenbacher, J.; Reinhold, B.; Remoto, A.; Röhling, M.; Roncin, R.; Roth, S.; Sakamoto, Y.; Santorelli, R.; Sato, F.; Schönert, S.; Schoppmann, S.; Schwetz, T.; Shaevitz, M.; Shimojima, S.; Shrestha, D.; Sida, J-L.; Sinev, V.; Skorokhvatov, M.; Smith, E.; Spitz, J.; Stahl, A.; Stancu, I.; Stokes, L.; Strait, M.; Stüken, A.; Suekane, F.; Sukhotin, S.; Sumiyoshi, T.; Sun, Y.; Svoboda, R.; Terao, K.; Tonazzo, A.; Toups, M.; Trinh Thi, H.; Valdiviesso, G.; Veyssiere, C.; Wagner, S.; Watanabe, H.; White, B.; Wiebusch, C.; Winslow, L.; Worcester, M.; Wurm, M.; Yermia, F.; Zimmer, V.

Author(s)

Conrad, Janet; Jones, Christopher LaDon; Spitz, Joshua B.; Terao, Kazuhiro; Winslow, Lindley

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Abstract

The Double Chooz experiment has observed 8249 candidate electron antineutrino events in 227.93 live days with 33.71 GW-ton-years (reactor power×detector mass×live time) exposure using a 10.3 m[superscript 3] fiducial volume detector located at 1050 m from the reactor cores of the Chooz nuclear power plant in France. The expectation in case of θ[subscript 13]=0 is 8937 events. The deficit is interpreted as evidence of electron antineutrino disappearance. From a rate plus spectral shape analysis we find sin[superscript 2]2θ[subscript 13]=0.109±0.030(stat)±0.025(syst). The data exclude the no-oscillation hypothesis at 99.8% CL (2.9σ).

Date issued

2012-09

URI

http://hdl.handle.net/1721.1/76198

Department

Massachusetts Institute of Technology. Department of Physics

Journal

Physical Review D

Publisher

American Physical Society

Citation

Version: Final published version

ISSN

1550-7998

1089-4918

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