Direct Measurement of Backgrounds using Reactor-Off Data in Double Chooz

Yoshihito Abe,A Cucoanes, J Haser,Z Djurcic,W Potzel,E Blucher,A Hatzikoutelis,A Hourlier,V Durand,L A Winslow,P J Chang, S M Fernandes,Yu Kamyshkov, S A Dazeley,Daphne C Mckee,Ronald H Carr,J M Lopezcastano,M Strait,P Pfahler,I Stancu,A Stahl,J Maeda,Takahiko Matsubara,Dale L Greiner,Y Kibe, M Toups,F Hartmann, V Zimmer,C N Maesano, R Gama,J C Barriere, S Shimojima,M Kuze, E Conover,Molly F Franke,M Obolensky, M Fechner,S Schonert,J Spitz,G Mention,J Busenitz,C Jollet, F Yermia,T Konno,Masaki Ishitsuka,Thomas Schwetz,A Remoto, Lynne Stokes,F Suekane,M H Shaevitz, J Reichenbacher, C Veyssiere, H P Lima,H Furuta,G Pronost,M Skorokhvatov,P Novella,M Dracos, T Lasserre,N S Bowden,A Etenko,A Meregaglia, E B O Smith,S Perasso,S Roth, E Damon, L Oberauer,J Jochum,Y V Efremenko,R Svoboda,S Sukhotin,M Hofmann,J V Dawson,Michael J Meyer,G A Hortonsmith,J Ebert,D Franco, M Worcester,Kiyokazu Nakajima,J Felde,C Hagner,Fumihiro Sato,T Classen,D Shrestha,M Fallot,L Giot,J I Crespoanadon,Tomohisa Hayakawa,C H Wiebusch,A Porta,G Keefer,M Elnimr,M Bergevin,N Haag,Yuanyuan Sun, Angela E Erickson,B R White, R Milincic,C Aberle, A Stuken,Hirofumi Watanabe,L F G Gonzalez,M Wurm,P Chimenti,C L Jones,Y Nagasaka,T Miletic,A Bernstein, B Rybolt,A Tonazzo, M V Dagostino,T Sumiyoshi, T Kawasaki,C Palomares,J Martino,I Ostrovskiy, L N Kalousis,B K Lubsandorzhiev,A Letourneau,C Mariani,M Cerrada, J Conrad,E Caden, L Bezrukhov,C Buck,J M Losecco,E Kemp,I M Pepe,J Maricic, Y Sakamoto,D M Kaplan,Gustavo Do A Valdiviesso,D Dietrich,H Miyata,H H Trinh Thi,Antoine Collin, V V Sinev,R Santorelli, I Gilbotella,J T M Goon, D Lhuillier, P Perrin,B Reinhold,D Kryn, Kenji Terao,M Rohling, A J Franke,S Schoppmann,T Mueller,T Lachenmaier, F Kaether, M C Goodman,H De Kerret,M Gogerneff,M Lindner,F Von Feilitzsch,L Camilleri,A Cabrera, S R Wagner, A Onillon,T J C Bezerra,V Fischer,K Crum,L Goodenough,T Hara,J C Dos Anjos, S Lucht,A Osborn,C Langbrandtner,S Habib, R Roncin,Jl Sida,C Lane

PHYSICAL REVIEW D（2013）

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摘要

Double Chooz is unique among modern reactor-based neutrino experiments studying (nu) over bar (e) disappearance in that data can be collected with all reactors off. In this paper, we present data from 7.53 days of reactor-off running. Applying the same selection criteria as used in the Double Chooz reactor-on oscillation analysis, a measured background rate of 1.0 +/- 0.4 events/day is obtained. The background model for accidentals, cosmogenic beta-n-emitting isotopes, fast neutrons from cosmic muons, and stopped-mu decays used in the oscillation analysis is demonstrated to be correct within the uncertainties. Kinematic distributions of the events, which are dominantly cosmic-ray-produced correlated-background events, are provided. The background rates are scaled to the shielding depths of two other reactor-based oscillation experiments, Daya Bay and RENO. DOI: 10.1103/PhysRevD.87.011102

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关键词

background,neutrino oscillation,shielding,nuclear reactor

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