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| Titre : |
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Indication of reactor electron antineutrinos disappearance in the Double Chooz experiment |
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| Auteur : |
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Y. Abe, C. Aberle, T. Akiri1, J. C. Dos Anjos, F. Ardellier2, A. F. Barbosa, A. Baxter, M. Bergevin, A. Bernstein, T. J. C. Bezerra, L. Bezrukhov, E. Blucher, M. Bongrand2, N. S. Bowden, C. Buck, J. Busenitz, A. Cabrera1, E. Caden, L. Camilleri, R. Carr, M. Cerrada, P.-J. Chang, P. Chimenti, T. Classen, A. P. Collin2, E. Conover, J. M. Conrad, S. Cormon2, 3, J. I. Crespo-Anadón, M. Cribier1, 2, K. Crum, A. Cucoanes3, M. V. D'Agostino, E. Damon, J.V. Dawson1, S. Dazeley, M. Dierckxsens, D. Dietrich, Z. Djurcic, M. Dracos4, V. Durand1, 2, Y. Efremenko, M. Elnimr, Y. Endo, A. Etenko, E. Falk, M. Fallot3, M. Fechner, F. Von Feilitzsch, J. Felde, S. M. Fernandes, D. Franco1, A. J. Franke, M. Franke, H. Furuta, R. Gama, I. Gil-Botella, L. Giot3, M. Göger-Neff, L. F. G. Gonzalez, M. C. Goodman, J. Tm. Goon, D. Greiner, B. Guillon3, N. Haag, C. Hagner, T. Hara, F. X. Hartmann, J. Hartnell, T. Haruna, J. Haser, A. Hatzikoutelis, T. Hayakawa, M. Hofmann, G. A. Horton-Smith, M. Ishitsuka, J. Jochum, C. Jollet4, C. L. Jones, F. Kaether, L. Kalousis4, Y. Kamyshkov, D. M. Kaplan, T. Kawasaki, G. Keefer, E. Kemp, H. De Kerret1, Y. Kibe, T. Konno, D. Kryn1, M. Kuze, T. Lachenmaier, C. E. Lane, C. Langbrandtner, T. Lasserre1, 2, A. Letourneau2, D. Lhuillier2, H. P. Lima, M. Lindner, Y. Liu, J. M. López-Castanõ, J. M. LoSecco, B. K. Lubsandorzhiev, S. Lucht, D. Mckee, J. Maeda, C. N. Maesano, C. Mariani, J. Maricic, J. Martino3, T. Matsubara, G. Mention2, A. Meregaglia4, T. Miletic, R. Milincic, A. Milzstajn2, H. Miyata, D. Motta2, Th. A. Mueller2, Y. Nagasaka, K. Nakajima, P. Novella, M. Obolensky1, L. Oberauer, A. Onillon3, A. Osborn, I. Ostrovskiy, C. Palomares, S. J. M. Peeters, I. M. Pepe, S. Perasso, P. Perrin2, P. Pfahler, A. Porta3, W. Potzel, R. Queval2, J. Reichenbacher, B. Reinhold, A. Remoto1, 3, D. Reyna, M. Röhling, S. Roth, H. A. Rubin, Y. Sakamoto, R. Santorelli, F. Sato, S. Schönert, S. Schoppmann, U. Schwan, T. Schwetz, M. H. Shaevitz, D. Shrestha, J.-L. Sida2, V. Sinev, M. Skorokhvatov, E. Smith, J. Spitz, A. Stahl, I. Stancu, M. Strait, A. Stüken, F. Suekane, S. Sukhotin, T. Sumiyoshi, Y. Sun, Z. Sun2, R. Svoboda, H. Tabata, N. Tamura, K. Terao, A. Tonazzo1, M. Toups, H. H. Trinh Thi, C. Veyssiere2, D. Vignaud1, S. Wagner, H. Watanabe, B. White, C. Wiebusch, L. Winslow, M. Worcester, M. Wurm, E. Yanovitch, Frédéric Yermia3, K. Zbiri3, V. Zimmer |
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| Laboratoire : |
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| équipe(s) de recherche : |
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APC - Neutrinos |
| Résumé : |
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The Double Chooz experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. An observed-to-predicted ratio of events of 0.944±0.016(stat)±0.040(syst) was obtained in 101 days of running at the Chooz nuclear power plant in France, with two 4.25GWth reactors. The results were obtained from a single 10m3 fiducial volume detector located 1050 m from the two reactor cores. The reactor antineutrino flux prediction used the Bugey4 flux measurement after correction for differences in core composition. The deficit can be interpreted as an indication of a nonzero value of the still unmeasured neutrino mixing parameter sin22θ13. Analyzing both the rate of the prompt positrons and their energy spectrum, we find sin22θ13=0.086±0.041(stat)±0.030(syst), or, at 90% C.L., 0.017 |
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| Collaboration/Projet : |
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Double-CHOOZ |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication ou d'écriture : |
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03/2012 |
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| Nom du périodique : |
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| Physical Review Letters (Phys. Rev. Lett.) |
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American Physical Society |
| ISSN |
0031-9007 (eISSN : 1079-7114) |
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| Volume : |
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108 |
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| Page/Article : |
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131801 |
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| Copyright : |
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© 2012 American Physical Society |
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| Commentaire : |
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7 pages, 3 figures, see paper for full list of authors |
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| Mot(s)-clé(s) : |
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Neutrino mass and mixing – Neutrino interactions – Neutrino scattering – Neutrino – muon – pion – and other elementary particle detectors – cosmic ray detectors |
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