1. Indication for the disappearance of reactor electron antineutrinos in the Double Chooz experiment
- Author
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Abe, Y., Aberle, C., Akiri, T., Anjos, J. C. dos, Ardellier, F., Barbosa, A. F., Baxter, A., Bergevin, M., Bernstein, A., Bezerra, T. J. C., Bezrukhov, L., Blucher, E., Bongrand, M., Bowden, N. S., Buck, C., Busenitz, J., Cabrera, A., Caden, E., Camilleri, L., Carr, R., Cerrada, M., Chang, P. -J., Chimenti, P., Classen, T., Collin, A. P., Conover, E., Conrad, J. M., Cormon, S., Crespo-Anad��n, J. I., Cribier, M., Crum, K., Cucoanes, A., D'Agostino, M. V., Damon, E., Dawson, J. V., Dazeley, S., Dierckxsens, M., Dietrich, D., Djurcic, Z., Dracos, M., Durand, V., Efremenko, Y., Elnimr, M., Endo, Y., Etenko, A., Falk, E., Fallot, M., Fechner, M., von Feilitzsch, F., Felde, J., Fernandes, S. M., Franco, D., Franke, A. J., Franke, M., Furuta, H., Gama, R., Gil-Botella, I., Giot, L., G��ger-Neff, M., Gonzalez, L. F. G., Goodman, M. C., Goon, J. TM., Greiner, D., Guillon, B., Haag, N., Hagner, C., Hara, T., Hartmann, F. X., Hartnell, J., Haruna, T., Haser, J., Hatzikoutelis, A., Hayakawa, T., Hofmann, M., Horton-Smith, G. A., Ishitsuka, M., Jochum, J., Jollet, C., Jones, C. L., Kaether, F., Kalousis, L., Kamyshkov, Y., Kaplan, D. M., Kawasaki, T., Keefer, G., Kemp, E., de Kerret, H., Kibe, Y., Konno, T., Kryn, D., Kuze, M., Lachenmaier, T., Lane, C. E., Langbrandtner, C., Lasserre, T., Letourneau, A., Lhuillier, D., Lima, H. P., Lindner, M., Liu, Y., L��pez-Castan��, J. M., LoSecco, J. M., Lubsandorzhiev, B. K., Lucht, S., McKee, D., Maeda, J., Maesano, C. N., Mariani, C., Maricic, J., Martino, J., Matsubara, T., Mention, G., Meregaglia, A., Miletic, T., Milincic, R., Milzstajn, A., Miyata, H., Motta, D., Mueller, Th. A., Nagasaka, Y., Nakajima, K., Novella, P., Obolensky, M., Oberauer, L., Onillon, A., Osborn, A., Ostrovskiy, I., Palomares, C., Peeters, S. J. M., Pepe, I. M., Perasso, S., Perrin, P., Pfahler, P., Porta, A., Potzel, W., Queval, R., Reichenbacher, J., Reinhold, B., Remoto, A., Reyna, D., R��hling, M., Roth, S., Rubin, H. A., Sakamoto, Y., Santorelli, R., Sato, F., Sch��nert, S., Schoppmann, S., Schwan, U., Schwetz, T., Shaevitz, M. H., Shrestha, D., Sida, J-L., Sinev, V., Skorokhvatov, M., Smith, E., Spitz, J., Stahl, A., Stancu, I., Strait, M., St��ken, A., Suekane, F., Sukhotin, S., Sumiyoshi, T., Sun, Y., Sun, Z., Svoboda, R., Tabata, H., Tamura, N., Terao, K., Tonazzo, A., Toups, M., Thi, H. H. Trinh, Veyssiere, C., Wagner, S., Watanabe, H., White, B., Wiebusch, C., Winslow, L., Worcester, M., Wurm, M., Yanovitch, E., Yermia, F., Zbiri, K., and Zimmer, V.
- Subjects
High Energy Physics - Experiment (hep-ex) ,FOS: Physical sciences ,High Energy Physics - Experiment - Abstract
The Double Chooz Experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. A ratio of 0.944 $\pm$ 0.016 (stat) $\pm$ 0.040 (syst) observed to predicted events was obtained in 101 days of running at the Chooz Nuclear Power Plant in France, with two 4.25 GW$_{th}$ reactors. The results were obtained from a single 10 m$^3$ fiducial volume detector located 1050 m from the two reactor cores. The reactor antineutrino flux prediction used the Bugey4 measurement as an anchor point. The deficit can be interpreted as an indication of a non-zero value of the still unmeasured neutrino mixing parameter \sang. Analyzing both the rate of the prompt positrons and their energy spectrum we find \sang = 0.086 $\pm$ 0.041 (stat) $\pm$ 0.030 (syst), or, at 90% CL, 0.015 $, Comment: 7 pages, 4 figures, (new version after PRL referee's comments)
- Published
- 2011