학술논문
Indication for the disappearance of reactor electron antineutrinos in the Double Chooz experiment
Document Type
Working Paper
Author
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-Anadón, 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.; Göger-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 Jr, H. P.; Lindner, M.; Liu, Y.; López-Castanõ, 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.; Röhling, M.; Roth, S.; Rubin, H. A.; Sakamoto, Y.; Santorelli, R.; Sato, F.; Schönert, 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.; Stüken, 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.; Zimmer, V.
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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 $<$ \sang $\ <$ 0.16.
Comment: 7 pages, 4 figures, (new version after PRL referee's comments)
Comment: 7 pages, 4 figures, (new version after PRL referee's comments)