The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle θ13 by including 7.53 days of reactor-off data. A global fit of the observed antineutrino rates for different reactor power conditions is performed, yielding a measurement of both θ13 and the total background rate. The results on the mixing angle are improved significantly by including the reactor-off data in the fit, as it provides a direct measurement of the total background rate. This reactor rate modulation analysis considers antineutrino candidates with neutron captures on both Gd and H, whose combination yields sin2(2θ13) = 0.102 ± 0.028(stat.) ± 0.033(syst.). The results presented in this study are fully consistent with the ones already published by Double Chooz, achieving a competitive precision. They provide, for the first time, a determination of θ13 that does not depend on a background model. © 2014 The Authors.

Abe, Y., Dos Anjos, J., Barriere, J., Baussan, E., Bekman, I., Bergevin, M., et al. (2014). Background-independent measurement of θ13 in Double Chooz. PHYSICS LETTERS. SECTION B, 735, 51-56 [10.1016/j.physletb.2014.04.045].

Background-independent measurement of θ13 in Double Chooz

Minotti A.;
2014

Abstract

The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle θ13 by including 7.53 days of reactor-off data. A global fit of the observed antineutrino rates for different reactor power conditions is performed, yielding a measurement of both θ13 and the total background rate. The results on the mixing angle are improved significantly by including the reactor-off data in the fit, as it provides a direct measurement of the total background rate. This reactor rate modulation analysis considers antineutrino candidates with neutron captures on both Gd and H, whose combination yields sin2(2θ13) = 0.102 ± 0.028(stat.) ± 0.033(syst.). The results presented in this study are fully consistent with the ones already published by Double Chooz, achieving a competitive precision. They provide, for the first time, a determination of θ13 that does not depend on a background model. © 2014 The Authors.
Articolo in rivista - Articolo scientifico
neutrino oscillation; neutrino mixing
English
51
56
6
Abe, Y., Dos Anjos, J., Barriere, J., Baussan, E., Bekman, I., Bergevin, M., et al. (2014). Background-independent measurement of θ13 in Double Chooz. PHYSICS LETTERS. SECTION B, 735, 51-56 [10.1016/j.physletb.2014.04.045].
Abe, Y; Dos Anjos, J; Barriere, J; Baussan, E; Bekman, I; Bergevin, M; Bezerra, T; Bezrukov, L; Blucher, E; Buck, C; Busenitz, J; Cabrera, A; Caden, E; Camilleri, L; Carr, R; Cerrada, M; Chang, P; Chauveau, E; Chimenti, P; Collin, A; Conover, E; Conrad, J; Crespo-Anadon, J; Crum, K; Cucoanes, A; Damon, E; Dawson, J; Dietrich, D; Djurcic, Z; Dracos, M; Elnimr, M; Etenko, A; Fallot, M; Von Feilitzsch, F; Felde, J; Fernandes, S; Fischer, V; Franco, D; Franke, M; Furuta, H; Gil-Botella, I; Giot, L; Goger-Neff, M; Gonzalez, L; Goodenough, L; Goodman, M; Grant, C; Haag, N; Hara, T; Haser, J; Hofmann, M; Horton-Smith, G; Hourlier, A; Ishitsuka, M; Jochum, J; Jollet, C; Kaether, F; Kalousis, L; Kamyshkov, Y; Kaplan, D; Kawasaki, T; Kemp, E; De Kerret, H; Konno, T; Kryn, D; Kuze, M; Lachenmaier, T; Lane, C; Lasserre, T; Letourneau, A; Lhuillier, D; Lima, H; Lindner, M; Lopez-Castano, J; Losecco, J; Lubsandorzhiev, B; Lucht, S; Maeda, J; Mariani, C; Maricic, J; Martino, J; Matsubara, T; Mention, G; Meregaglia, A; Miletic, T; Milincic, R; Minotti, A; Nagasaka, Y; Nakajima, K; Nikitenko, Y; Novella, P; Obolensky, M; Oberauer, L; Onillon, A; Osborn, A; Palomares, C; Pepe, I; Perasso, S; Pfahler, P; Porta, A; Pronost, G; Reichenbacher, J; Reinhold, B; Rohling, M; Roncin, R; Roth, S; Rybolt, B; Sakamoto, Y; Santorelli, R; Sato, F; Schilithz, A; Schonert, S; Schoppmann, S; Shaevitz, M; Sharankova, R; Shimojima, S; Sibille, V; Sinev, V; Skorokhvatov, M; Smith, E; Spitz, J; Stahl, A; Stancu, I; Stokes, L; Strait, M; Stuken, A; Suekane, F; Sukhotin, S; Sumiyoshi, T; Sun, Y; Svoboda, R; Terao, K; Tonazzo, A; Trinh Thi, H; Valdiviesso, G; Vassilopoulos, N; Veyssiere, C; Vivier, M; Wagner, S; Watanabe, H; Wiebusch, C; Winslow, L; Wurm, M; Yang, G; Yermia, F; Zimmer, V
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/316746
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