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Maesano, C. Palomares, C. Veyssiere, C. Wiebusch, D. Dietrich, D. Franco, D. Greiner, D. Kryn, D. Lhuillier, D. McKee, D. M. Kaplan, D. Shrestha, E. Blucher, E. Caden, E. Conover, E. Damon, E. Kemp, E. Smith, F. Kaether, F. Sato, F. Suekane, F. von Feilitzsch, F. X. Hartmann, F. Yermia, G. A. Horton-Smith, G. Keefer, G. Mention, G. Valdiviesso, H. de Kerret, H. Furuta, H. H. Trinh Thi, H. Miyata, H. P. Lima Jr, H. Watanabe, I. Gil-Botella, I. M. Pepe, I. Ostrovskiy, I. Stancu, J. Busenitz, J. C. Barriere, J. C. dos Anjos, J. Ebert, J. Felde, J. Haser, J. I. Crespo-Anad\\'on, J. Jochum, J.-L. Sida, J. Maeda, J. Maricic, J. Martino, J. M. Conrad, J. M. L\\'opez-Castan\\~o, J. M. LoSecco, J. Reichenbacher, J. Spitz, J. TM. Goon, J. V. Dawson, K. Crum, K. Nakajima, K. Terao, L. Bezrukhov, L. Camilleri, L. F. F. Stokes, L. F. G. Gonzalez, L. Giot, L. N. Kalousis, L. Oberauer, L. Winslow, M. Bergevin, M. Cerrada, M. C. Goodman, M. Dracos, M. Elnimr, M. Fallot, M. Fechner, M. Franke, M. Goger-Neff, M. Hofmann, M. H. Shaevitz, M. Ishitsuka, M. Kuze, M. Lindner, M. Obolensky, M. Rohling, M. Skorokhvatov, M. Strait, M. Toups, M. V. D'Agostino, M. Worcester, M. Wurm, N. Haag, N. S. Bowden, P. Chimenti, P.-J. Chang, P. Novella, P. Perrin, P. Pfahler, R. Carr, R. Gama, R. Milincic, R. Roncin, R. Santorelli, R. Svoboda, S. Dazeley, S. Lucht, S. Perasso, S. Roth, S. Schonert, S. Schoppmann, S. Shimojima, S. Sukhotin, S. Wagner, T. Classen, Th. A. Mueller, T. Hara, T. Hayakawa, T. J. C. Bezerra, T. Kawasaki, T. Konno, T. Lachenmaier, T. Lasserre, T. Matsubara, T. Miletic, T. Schwetz, T. Sumiyoshi, V. Durand, V. Sinev, V. Zimmer, W. Potzel, Y. Abe, Y. Efremenko, Y. Kamyshkov, Y. Kibe, Y. Nagasaka, Y. Sakamoto, Y. Sun, Z. Djurcic","submitted_at":"2012-07-27T02:15:22Z","abstract_excerpt":"The Double Chooz experiment has observed 8,249 candidate electron antineutrino events in 227.93 live days with 33.71 GW-ton-years (reactor power x detector mass x livetime) exposure using a 10.3 cubic meter fiducial volume detector located at 1050 m from the reactor cores of the Chooz nuclear power plant in France. The expectation in case of theta13 = 0 is 8,937 events. The deficit is interpreted as evidence of electron antineutrino disappearance. From a rate plus spectral shape analysis we find sin^2 2{\\theta}13 = 0.109 \\pm 0.030(stat) \\pm 0.025(syst). 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