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

Double Chooz is unique among modern reactor-based neutrino experiments studying \(\bar \nu_e\) 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 rea...

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Veröffentlicht in:	arXiv.org 2012-10
Hauptverfasser:	Abe, Y, Barriere, J C, Bergevin, M, Bernstein, A, Bezerra, T J C, Bowden, N S, Busenitz, J, Caden, E, Carr, R, Cerrada, M, P -J Chang, Classen, T, Conover, E, Conrad, J M, Crespo-Anadon, J I, Crum, K, Cucoanes, A, Dazeley, S, Djurcic, Z, Dracos, M, Elnimr, M, Erickson, A, Fallot, M, Fechner, M, F von Feilitzsch, Felde, J, Fernandes, S M, Fischer, V, Gama, R, Gil-Botella, I, Giot, L, Göger-Neff, M, Gonzalez, L F G, Goon, J TM, Haag, N, Habib, S, Hagner, C, Hara, T, Hartmann, F X, Haser, J, Hayakawa, T, Hourlier, A, Jollet, C, Jones, C L, Kawasaki, T, Keefer, G, Kemp, E, de Kerret, H, Kibe, Y, Lachenmaier, T, Lane, C E, Langbrandtner, C, Lasserre, T, Lhuillier, D, Lopez-Castano, J M, LoSecco, J M, Lubsandorzhiev, B K, Lucht, S, McKee, D, Maeda, J, Maesano, C N, Mariani, C, Maricic, J, Martino, J, Meyer, M, Miyata, H, Mueller, Th A, Nagasaka, Y, Oberauer, L, Onillon, A, Ostrovskiy, I, Pepe, I M, Perasso, S, Pfahler, P, Potzel, W, Remoto, A, Roth, S, Sakamoto, Y, Sato, F, Schoppmann, S, Schwetz, T, Shaevitz, M H, J-L Sida, Skorokhvatov, M, Spitz, J, Stokes, L F F, Strait, M, Suekane, F, Sukhotin, S, Sun, Y, Tonazzo, A, Trinh Thi, H H, Valdiviesso, G, Wagner, S, White, B, Winslow, L, Worcester, M, Wurm, M, Yermia, F, Zimmer, V
Format:	Artikel
Sprache:	eng
Schlagworte:	Background radiation Cosmic rays Decay rate Fast neutrons Muons Neutrinos Physics - High Energy Physics - Experiment Physics - Nuclear Experiment Shielding
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Zusammenfassung:	Double Chooz is unique among modern reactor-based neutrino experiments studying \(\bar \nu_e\) 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\(\pm\)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.
ISSN:	2331-8422
DOI:	10.48550/arxiv.1210.3748