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Direct measurement of backgrounds using reactor-off data in Double Chooz

Abe, Y. / Aberle, C. / C. Dos Anjos, J. / C. Barriere, J. / Bergevin, M. / Bernstein, A. / J. C. Bezerra, T. / Bezrukhov, L. / Blucher, E. / S. Bowden, N. / Buck, C. / Busenitz, J. / Cabrera, A. / Caden, E. / Camilleri, L. / Carr, R. / Cerrada, M. / Chang, P.-J. / Chimenti, P. / Classen, T. / P. Collin, A. / Conover, E. / M. Conrad, J. / I. Crespo-Anadón, J. / Crum, K. / Cucoanes, A. / V. D'Agostino, M. / Damon, E. / Dawson, J.V. / Dazeley, S. / Dietrich, D. / Djurcic, Z. / Dracos, M. / Durand, V. / Ebert, J. / Efremenko, Y. / Elnimr, M. / Erickson, A. / Etenko, A. / Fallot, M. / Fechner, M. / Von Feilitzsch, F. / Felde, J. / M. Fernandes, S. / Fischer, V. / Franco, D. / J. Franke, A. / Franke, M. / Furuta, H. / Gama, R. / Gil-Botella, I. / Giot, L. / Göger-Neff, M. / F. G. Gonzalez, L. / Goodenough, L. / C. Goodman, M. / T. M. Goon, J. / Greiner, D. / Haag, N. / Habib, S. / Hagner, C. / Hara, T. / X. Hartmann, F. / Haser, J. / Hatzikoutelis, A. / Hayakawa, T. / Hofmann, M. / A. Horton-Smith, G. / Hourlier, A. / Ishitsuka, M. / Jochum, J. / Jollet, C. / L. Jones, C. / Kaether, F. / N. Kalousis, L. / Kamyshkov, Y. / M. Kaplan, D. / Kawasaki, T. / Keefer, G. / Kemp, E. / De Kerret, H. / Kibe, Y. / Konno, T. / Kryn, D. / Kuze, M. / Lachenmaier, T. / E. Lane, C. / Langbrandtner, C. / Lasserre, T. / Letourneau, A. / Lhuillier, D. / P. Lima, H. / Lindner, M. / M. López-Castaño, J. / M. Losecco, J. / K. Lubsandorzhiev, B. / Lucht, S. / Mckee, D. / Maeda, J. / N. Maesano, C. / Mariani, C. / Maricic, J. / Martin, J. / Matsubara, T. / Mention, G. / Meregaglia, A. / Meyer, M. / Miletic, T. / Milincic, R. / Miyata, H. / A. Mueller, Th. / Nagasaka, Y. / Nakajima, K. / Novella, P. / Obolensky, M. / Oberauer, L. / Onillon, A. / Osborn, A. / Ostrovskiy, I. / Palomares, C. / M. Pepe, I. / Perasso, S. / Perrin, P. / Pfahler, P. / Porta, A. / Potzel, W. / Pronost, G. / Reichenbacher, J. / Reinhold, B. / Remoto, A. / Röhling, M. / Roncin, R. / Roth, S. / Rybolt, B. / Sakamoto, Y. / Santorelli, R. / Sato, F. / Schönert, S. / Schoppmann, S. / Schwetz, T. / H. Shaevitz, M. / Shimojima, S. / Shrestha, D. / Sida, J.-L. / Sinev, V. / Skorokhvatov, M. / Smith, E. / Spitz, J. / Stahl, A. / Stancu, I. / F. F. Stokes, L. / Strait, M. / Stüken, A. / Suekane, F. / Sukhotin, S. / Sumiyoshi, T. / Sun, Y. / Svoboda, R. / Terao, K. / Tonazzo, A. / Toups, M. / H. Trinh Thi, H. / Valdiviesso, G. / Veyssiere, C. / Wagner, S. / Watanabe, H. / White, B. / Wiebusch, C. / Winslow, L. / Worcester, M. / Wurm, M. / Yermia, Frédéric / Zimmer, V. - 2013
Double Chooz is unique among modern reactor-based neutrino experiments studying ν̅ 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 β-n-emitting isotopes, fast neutrons from cosmic muons, and stopped-μ 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.

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