Reactor ν ̄e disappearance in the Double Chooz experiment

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

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Abstract

The Double Chooz experiment has observed 8249 candidate electron antineutrino events in 227.93 live days with 33.71GW-ton-years (reactor power×detector mass×live time) exposure using a 10.3m3 fiducial volume detector located at 1050m from the reactor cores of the Chooz nuclear power plant in France. The expectation in case of θ 13=0 is 8937 events. The deficit is interpreted as evidence of electron antineutrino disappearance. From a rate plus spectral shape analysis we find sin22θ 13=0.109±0.030(stat)±0.025(syst) . The data exclude the no-oscillation hypothesis at 99.8%CL (2.9σ).

Original languageEnglish (US)
Article number052008
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume86
Issue number5
DOIs
StatePublished - Sep 18 2012

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