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25 April 2024

» arxiv » 1112.6353

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Indication for the disappearance of reactor electron antineutrinos in the Double Chooz experiment
Y. Abe ; C. Aberle ; T. Akiri ; J.C. dos Anjos ; F. Ardellier ; A.F. Barbosa ; A. Baxter ; A. Bernstein ; T.J.C. Bezerra ; L. Bezrukhov ; E. Blucher ; M. Bongrand ; N.S. Bowden ; C. Buck ; J. Busenitz ; A. Cabrera ; E. Caden ; L. Camilleri ; R. Carr ; M. Cerrada ; P.-J. Chang ; P. Chimenti ; T. Classen ; A. Collin ; E. Conover ; J.M. Conrad ; S. Cormon ; J.I. Crespo-Anadón ; M. Cribier ; K. Crum ; A. Cucoanes ; M.V. D'Agostino ; E. Damon ; J.V. Dawson ; S. Dazeley ; M. Dierckxsens ; D. Dietrich ; Z. Djurcic ; M. Dracos ; V. Durand ; Y. Efremenko ; Y. Endo ; A. Etenko ; E. Falk ; M. Fallot ; M. Fechner ; F. von Feilitzsch ; J. Felde ; S.M. Fernandes ; D. Franco ; A. 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 ; B. Guillon ; N. Haag ; C. Hagner ; T. Hara ; F.X. Hartmann ; J. Hartnell ; T. Haruna ; J. Haser ; A. Hatzikoutelis ; T. Hayakawa ; M. Hofmann ; G. Horton-Smith ; M. Ishitsuka ; J. Jochum ; C. Jollet ; C.L. Jones ; F. Kaether ; L. Kalousis ; Y. Kamyshkov ; D. 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 Jr ; 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. Martino ; T. Matsubara ; G. Mention ; A. Meregaglia ; T. Miletic ; R. Milincic ; A. Milzstajn ; H. Miyata ; D. Motta ; Th.A. Mueller ; Y. Nagasaka ; K. Nakajima ; P. Novella ; M. Obolensky ; L. Oberauer ; A. Onillon ; A. Osborn ; I. Ostrovskiy ; C. Palomares ; S.J.M. Peeters ; I.M. Pepe ; P. Perrin ; P. Pfahler ; A. Porta ; W. Potzel ; R. Queval ; J. Reichenbacher ; B. Reinhold ; A. Remoto ; D. Reyna ; M. Röhling ; S. Roth ; H.A. Rubin ; Y. Sakamoto ; R. Santorelli ; F. Sato ; S. Schönert ; S. Schoppmann ; U. Schwan ; T. Schwetz ; M. Shaevitz ; D. Shrestha ; J-L. Sida ; V. Sinev ; M. Skorokhvatov ; E. Smith ; A. Stahl ; I. Stancu ; M. Strait ; A. Stüken ; F. Suekane ; S. Sukhotin ; T. Sumiyoshi ; Y. Sun ; Z. Sun ; R. Svoboda ; H. Tabata ; N. Tamura ; K. Terao ; A. Tonazzo ; M. Toups ; H.H. Trinh Thi ; C. Veyssiere ; D. Vignaud ; S. Wagner ; H. Watanabe ; B. White ; C. Wiebusch ; L. Winslow ; M. Worcester ; M. Wurm ; E. Yanovitch ; F. Yermia ; K. Zbiri ; V. Zimmer ;
Date:	29 Dec 2011
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.
Source:	arXiv, 1112.6353
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