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1. Background-independent measurement of θ13 in Double Chooz

Author

Z. Djurcic, A. Stahl, M. Kuze, Christian Buck, B. Rybolt, J. Spitz, J. Maricic, Amanda Porta, H. de Kerret, D. Dietrich, R. Santorelli, J. M. López-Castaño, I. M. Pepe, P. Chimenti, Muriel Fallot, P. Novella, C. Grant, Yuri Kamyshkov, T. Matsubara, Y. Sakamoto, L. B. Bezrukov, M. Franke, J. Haser, A.C. Schilithz, V. Zimmer, A. Cucoanes, Florian Kaether, P.-J. Chang, I. Bekman, J. Felde, D. Franco, R. Carr, R. Sharankova, E. Kemp, N. Vassilopoulos, C. Mariani, J. C. dos Anjos, A.V. Etenko, J.V. Dawson, A. Minotti, Yoshio Abe, Josef Jochum, V. Sibille, J. M. LoSecco, M. D. Skorokhvatov, Michael Wurm, H. Watanabe, A. Stüken, F. Sato, F. von Feilitzsch, C. Palomares, I. Gil-Botella, A. Hourlier, Lydie Giot, Audrey Letourneau, E. Damon, M. Röhling, M. Vivier, D. Kryn, Sebastian Wagner, Anselmo Meregaglia, Y. Nikitenko, Daniel M. Kaplan, G. Yang, Marcos Cerrada, M. Elnimr, Manfred Lindner, H. P. Lima, Antoine Collin, J. Reichenbacher, Robert Svoboda, Eric Baussan, S. M. Fernandes, V. V. Sinev, Bayarto Lubsandorzhiev, Marcos Dracos, S. Schönert, T. Sumiyoshi, J. Busenitz, Kazuhiro Terao, Stefan Schoppmann, David Lhuillier, Lothar Oberauer, Thierry Lasserre, G. Mention, J. C. Barriere, L. Camilleri, M. Göger-Neff, M. Obolensky, S. Shimojima, Anatael Cabrera, F. Yermia, Christopher Wiebusch, G. A. Valdiviesso, I. Stancu, Michael Hofmann, Cécile Jollet, B. Reinhold, G. A. Horton-Smith, L. N. Kalousis, T.J.C. Bezerra, Matthew L Strait, H. H. Trinh Thi, M. C. Goodman, S. Roth, Yasushi Nagasaka, H. Furuta, M. H. Shaevitz, E. Conover, G. Pronost, A. Onillon, T. Kawasaki, S. Perasso, S. V. Sukhotin, A. Osborn, E. Smith, J. Maeda, J. Martino, N. Haag, Luis González, L. Goodenough, A. Tonazzo, E. Blucher, T. Miletic, Janet Conrad, R. Milincic, T. Konno, F. Suekane, L.F.F. Stokes, Tobias Lachenmaier, K. Nakajima, R. Roncin, Ying Sun, T. Hara, M. Bergevin, K. Crum, J. I. Crespo-Anadón, V. Fischer, S. Lucht, E. Chauveau, E. Caden, Masaki Ishitsuka, Lindley Winslow, P. Pfahler, C. E. Lane, and C. Veyssiere

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Oscillation, CHOOZ, 7. Clean energy, 01 natural sciences, Nuclear physics, 13. Climate action, 0103 physical sciences, Modulation (music), Neutron, Neutrino, 010306 general physics, Neutrino oscillation, Charged current, Mixing (physics)
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.

Published
2014
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2. First measurement of θ13 from delayed neutron capture on hydrogen in the Double Chooz experiment

Author

J. Maricic, A. Onillon, S. Roth, S. M. Fernandes, J. M. LoSecco, Anselmo Meregaglia, A. Hatzikoutelis, Masahiro Kuze, Th. A. Mueller, R. Santorelli, H. H. Trinh Thi, L. Camilleri, T. Hayakawa, J. Tm. Goon, V. V. Sinev, W. Potzel, M. Franke, I. M. Pepe, P. Chimenti, Matthew L Strait, T. Konno, I. Gil-Botella, Z. Djurcic, T. Matsubara, M. Fechner, Robert Svoboda, R. Roncin, Ying Sun, F. Suekane, L.F.F. Stokes, J. M. López-Castaño, Michael Hofmann, M. Toups, G. Keefer, Muriel Fallot, T. Classen, Steven Dazeley, H. P. Lima, A.V. Etenko, D. Kryn, J.V. Dawson, Amanda Porta, M. Röhling, T. Hara, M. Elnimr, J. Busenitz, R. Carr, Florian Kaether, M. Worcester, J. Felde, D. Franco, I. Stancu, D. Greiner, H. Furuta, B. White, H. de Kerret, Stefan Schoppmann, A. Remoto, C. Aberle, A. Cucoanes, M. Göger-Neff, G. Mention, E. Damon, S. Perasso, J. Ebert, Sebastian Wagner, Manfred Lindner, F. Hartmann, C. Mariani, Antoine Collin, E. Blucher, Josef Jochum, Yasushi Nagasaka, V. Durand, Daniel M. Kaplan, I. Ostrovskiy, P. Novella, L. Bezrukhov, F. von Feilitzsch, G. Pronost, K. Nakajima, Cécile Jollet, B. Reinhold, C. Langbrandtner, Tobias Lachenmaier, Adam Bernstein, P. Perrin, J. Maeda, L. Goodenough, Lothar Oberauer, A. Letourneau, A. Tonazzo, P. Pfahler, C. E. Lane, V. Zimmer, T. Kawasaki, S. Lucht, V. Fischer, R. Milincic, T. Sumiyoshi, E. Caden, A. J. Franke, J. Martino, M. Bergevin, Masaki Ishitsuka, Lindley Winslow, K. Crum, A. Osborn, A. Stahl, J. L. Sida, J. I. Crespo-Anadón, J. Reichenbacher, J. C. dos Anjos, A. Stüken, F. Sato, Yoshio Abe, C. Veyssiere, D. Shrestha, Yuri Kamyshkov, D. McKee, J. Spitz, P.-J. Chang, Marcos Cerrada, Yu. Efremenko, Caren Hagner, M. D. Skorokhvatov, Michael Wurm, H. Watanabe, M. Obolensky, L. N. Kalousis, T.J.C. Bezerra, R. Gama, Bayarto Lubsandorzhiev, Thierry Lasserre, J. C. Barriere, Manuel Meyer, Marcos Dracos, S. V. Sukhotin, E. Smith, N. Haag, Anna Erickson, J. Haser, T. Miletic, S. Habib, D. Lhuillier, Y. Sakamoto, F. Yermia, Anatael Cabrera, E. Conover, C. L. Jones, M. H. Shaevitz, A. Hourlier, Lydie Giot, E. Kemp, S. Schönert, S. Shimojima, G. A. Horton-Smith, Luis González, Nathaniel Bowden, Thomas Schwetz, Janet Conrad, C. Palomares, Kazuhiro Terao, Christopher Wiebusch, G. A. Valdiviesso, M. C. Goodman, H. Miyata, Christian Buck, B. Rybolt, C. N. Maesano, and D. Dietrich

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Flux, Photon energy, CHOOZ, 01 natural sciences, Nuclear physics, Neutron capture, Inverse beta decay, 0103 physical sciences, 010306 general physics, Neutrino oscillation, Delayed neutron, Charged current
Abstract

The Double Chooz experiment has determined the value of the neutrino oscillation parameter $\theta_{13}$ from an analysis of inverse beta decay interactions with neutron capture on hydrogen. This analysis uses a three times larger fiducial volume than the standard Double Chooz assessment, which is restricted to a region doped with gadolinium (Gd), yielding an exposure of 113.1 GW-ton-years. The data sample used in this analysis is distinct from that of the Gd analysis, and the systematic uncertainties are also largely independent, with some exceptions, such as the reactor neutrino flux prediction. A combined rate- and energy-dependent fit finds $\sin^2 2\theta_{13}=0.097\pm 0.034(stat.) \pm 0.034 (syst.)$, excluding the no-oscillation hypothesis at 2.0 \sigma. This result is consistent with previous measurements of $\sin^2 2\theta_{13}$.

Published
2013
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3. Muon capture on light isotopes measured with the Double Chooz detector

Author

A. Hourlier, L. B. Bezrukov, Eric Baussan, T. Brugière, S. M. Fernandes, J. Reichenbacher, A.V. Etenko, D. Hellwig, I. Stancu, L. Camilleri, T. Hara, C. Veyssiere, R. Carr, H. Furuta, G. Mention, Anatael Cabrera, J. C. dos Anjos, D. Shrestha, A. Onillon, M. H. Shaevitz, M. Vivier, J. M. LoSecco, C. Alt, Yoshio Abe, Anselmo Meregaglia, J. Spitz, H. Gomez, E. Conover, V. Zimmer, Amanda Porta, Marcos Cerrada, G. A. Horton-Smith, C. Mariani, H. P. Lima, H. de Kerret, G. Yang, J. Maeda, Josef Jochum, BayarJon Paul Lubsandorzhiev, A.C. Schilithz, I. Bekman, V. Sibille, S. Appel, I. Gil-Botella, N. Vassilopoulos, R. Roncin, J.V. Dawson, S. Perasso, L. Goodenough, Luis González, F. von Feilitzsch, J. Busenitz, R. Santorelli, J. M. López-Castaño, M. Kaneda, Muriel Fallot, B. Reinhold, A. Tonazzo, F. Yermia, Audrey Letourneau, Janet Conrad, E. Damon, E. Blucher, Y. Sakamoto, T. Miletic, Zelimir Djurcic, Matthew L Strait, T. Abrahão, Y. Kamyshkov, M. Franke, R. Svoboda, Masahiro Kuze, Florian Kaether, J. Felde, J. Dhooghe, G. Pronost, F. Suekane, M. Obolensky, L.F.F. Stokes, P. Novella, T. Sumiyoshi, D. Franco, J. Martino, David Lhuillier, V. V. Sinev, N. Walsh, E. Kemp, M. Röhling, Takeo Kawasaki, A. Minotti, I. M. Pepe, P. Chimenti, Lydie Giot, A. Stahl, Lothar Oberauer, T. Matsubara, M. Göger-Neff, R. Milincic, E. Chauveau, Cécile Jollet, S. Schönert, A. Osborn, Yasushi Nagasaka, Daniel M. Kaplan, Stefan Schoppmann, H. Almazan, C. E. Lane, Masaki Ishitsuka, J. Maricic, Tobias Lachenmaier, V. Fischer, Y. Sun, Stephen Robert Wagner, Marcos Dracos, M. Bergevin, S. V. Sukhotin, E. Smith, N. Haag, K. Crum, J. I. Crespo-Anadón, S. Lucht, R. Sharankova, Diana Navas-Nicolas, C. Palomares, Michael Hofmann, Christian Buck, L. N. Kalousis, T.J.C. Bezerra, D. Dietrich, Kazuhiro Terao, A. S. Cucoanes, Christopher Wiebusch, G. A. Valdiviesso, M. C. Goodman, J. Haser, M. D. Skorokhvatov, Michael Wurm, H. Watanabe, Thierry Lasserre, J. C. Barriere, D. Kryn, M. Soiron, H. H. Trinh Thi, Manfred Lindner, Antoine Collin, B. Rybolt, Abe, Y, Abrahao, T, Almazan, H, Alt, C, Appel, S, Barriere, J, Baussan, E, Bekman, I, Bergevin, M, Bezerra, T, Bezrukov, L, Blucher, E, Brugiere, T, Buck, C, Busenitz, J, Cabrera, A, Camilleri, L, Carr, R, Cerrada, M, Chauveau, E, Chimenti, P, Collin, A, Conover, E, Conrad, J, Crespo-Anadon, J, Crum, K, Cucoanes, A, Damon, E, Dawson, J, De Kerret, H, Dhooghe, J, Dietrich, D, Djurcic, Z, Dos Anjos, J, Dracos, M, Etenko, A, Fallot, M, Felde, J, Fernandes, S, Fischer, V, Franco, D, Franke, M, Furuta, H, Gil-Botella, I, Giot, L, Goger-Neff, M, Gomez, H, Gonzalez, L, Goodenough, L, Goodman, M, Haag, N, Hara, T, Haser, J, Hellwig, D, Hofmann, M, Horton-Smith, G, Hourlier, A, Ishitsuka, M, Jochum, J, Jollet, C, Kaether, F, Kalousis, L, Kamyshkov, Y, Kaneda, M, Kaplan, D, Kawasaki, T, Kemp, E, 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, Navas-Nicolas, D, Novella, P, Oberauer, L, Obolensky, M, Onillon, A, Osborn, A, Palomares, C, Pepe, I, Perasso, S, Porta, A, Pronost, G, Reichenbacher, J, Reinhold, B, Rohling, M, Roncin, R, Rybolt, B, Sakamoto, Y, Santorelli, R, Schilithz, A, Schonert, S, Schoppmann, S, Shaevitz, M, Sharankova, R, Shrestha, D, Sibille, V, Sinev, V, Skorokhvatov, M, Smith, E, Soiron, M, Spitz, J, Stahl, A, Stancu, I, Stokes, L, Strait, M, 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, Von Feilitzsch, F, Wagner, S, Walsh, N, Watanabe, H, Wiebusch, C, Wurm, M, Yang, G, Yermia, F, and Zimmer, V

Subjects
Physics, Semileptonic decay, Particle physics, education.field_of_study, Muon, 010308 nuclear & particles physics, Population, neutrino physic, 01 natural sciences, Muon capture, Nuclear physics, 13. Climate action, 0103 physical sciences, High Energy Physics::Experiment, Neutron, Production (computer science), Neutrino, 010306 general physics, Ground state, education
Abstract

Using the Double Chooz detector, designed to measure the neutrino mixing angle $\theta_{13}$, the products of $\mu^-$ capture on $^{12}$C, $^{13}$C, $^{14}$N and $^{16}$O have been measured. Over a period of 489.5 days, $2.3\times10^6$ stopping cosmic $\mu^-$ have been collected, of which $1.8\times10^5$ captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. The resulting isotopes were tagged using prompt neutron emission (when applicable), the subsequent beta decays, and, in some cases, $\beta$-delayed neutrons. The most precise measurement of the rate of $^{12}\mathrm C(\mu^-,\nu)^{12}\mathrm B$ to date is reported: $6.57^{+0.11}_{-0.21}\times10^{3}\,\mathrm s^{-1}$, or $(17.35^{+0.35}_{-0.59})\%$ of nuclear captures. By tagging excited states emitting gammas, the ground state transition rate to $^{12}$B has been determined to be $5.68^{+0.14}_{-0.23}\times10^3\,\mathrm s^{-1}$. The heretofore unobserved reactions $^{12}\mathrm C(\mu^-,\nu\alpha)^{8}\mathrm{Li}$, $^{13}\mathrm C(\mu^-,\nu\mathrm n\alpha)^{8}\mathrm{Li}$, and $^{13}\mathrm C(\mu^-,\nu\mathrm n)^{12}\mathrm B$ are measured. Further, a population of $\beta$n decays following stopping muons is identified with $5.5\sigma$ significance. Statistics limit our ability to identify these decays definitively. Assuming negligible production of $^{8}$He, the reaction $^{13}\mathrm C(\mu^-,\nu\alpha)^{9}\mathrm{Li}$ is found to be present at the $2.7\sigma$ level. Limits are set on a variety of other processes.

Published
2016

4. Journal of High Energy Physics

Author

G. Mention, R. Svoboda, T. Kawasaki, P. Novella, J. Dhooghe, N. Vassilopoulos, Amanda Porta, D. Kryn, Zelimir Djurcic, N. Walsh, J. Reichenbacher, J. M. López-Castaño, H. de Kerret, H. H. Trinh Thi, R. Milincic, Yuri Kamyshkov, Muriel Fallot, J. Martino, A. Cucoanes, S. Shimojima, A.C. Schilithz, P.-J. Chang, A. Onillon, L. B. Bezrukov, I. Bekman, J.V. Dawson, G. A. Horton-Smith, M. Franke, Anatael Cabrera, R. Carr, A. Stüken, S. M. Fernandes, K. Crum, Florian Kaether, E. Blucher, J. I. Crespo-Anadón, Y. Nikitenko, T. Sumiyoshi, S. Perasso, A. Minotti, Alain Letourneau, J. Felde, D. Franco, Marcos Cerrada, M. Elnimr, V. V. Sinev, Eric Baussan, Marcos Dracos, David Lhuillier, Ernesto Kemp, L. Camilleri, E. Damon, R. Sharankova, V. Fischer, J. Maricic, Manfred Lindner, J. C. dos Anjos, Antoine Collin, D. Shrestha, M. Obolensky, R. Santorelli, Luis González, Cécile Jollet, B. Reinhold, E. Conover, M. Bergevin, Yoshio Abe, L. N. Kalousis, T.J.C. Bezerra, S. Lucht, S. Roth, J. M. LoSecco, Anselmo Meregaglia, J. Spitz, Lothar Oberauer, Daniel M. Kaplan, C. Palomares, A. Stahl, Y. Sakamoto, I. Gil-Botella, V. Zimmer, C. Grant, C. Veyssiere, Tobias Lachenmaier, V. Sibille, S. V. Sukhotin, E. Smith, H. P. Lima, A. Osborn, M. Kuze, N. Haag, Christian Buck, B. Rybolt, R. Roncin, J. C. Barriere, J. Busenitz, Ying Sun, C. Mariani, A. Hourlier, Lydie Giot, M. Röhling, Josef Jochum, Junpei Maeda, L. Goodenough, F. von Feilitzsch, D. Dietrich, Michael Hofmann, Stefan Wagner, Matthew L Strait, Janet Conrad, T. Hara, A. Tonazzo, M. Göger-Neff, Kazuhiro Terao, Christopher Wiebusch, Yasushi Nagasaka, G. A. Valdiviesso, S. Schönert, M. C. Goodman, T. Miletic, F. Yermia, I. M. Pepe, P. Chimenti, G. Pronost, P. Pfahler, C. E. Lane, T. Matsubara, E. Chauveau, M. H. Shaevitz, E. Caden, Masaki Ishitsuka, Lindley Winslow, Stefan Schoppmann, J. Haser, M. Vivier, M. D. Skorokhvatov, Michael Wurm, H. Watanabe, G. Yang, Bayarto Lubsandorzhiev, Thierry Lasserre, F. Suekane, L.F.F. Stokes, A.V. Etenko, I. Stancu, H. Furuta, Double Chooz Collaboration, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Double-CHOOZ, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), 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, Dhooghe, 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, 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, Nikitenko, Y, Novella, P, Oberauer, L, Obolensky, M, 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, Schilithz, A, Schonert, S, Schoppmann, S, Shaevitz, M, Sharankova, R, Shimojima, S, Shrestha, D, 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, Walsh, N, Watanabe, H, Wiebusch, C, Winslow, L, Wurm, M, Yang, G, Yermia, F, Zimmer, V, Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and Center for Neutrino Physics

Subjects
Nuclear and High Energy Physics, [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Physics - Instrumentation and Detectors, Neutrino Detectors and Telescope, FOS: Physical sciences, CHOOZ, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Experiment, Distortion, 0103 physical sciences, Energy spectrum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Mixing (physics), Physics, Neutrino Detectors and Telescopes, 010308 nuclear & particles physics, Oscillation, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Detector, Function (mathematics), Instrumentation and Detectors (physics.ins-det), Neutrino, Instrumentation and Detectors
Abstract

The Double Chooz experiment presents improved measurements of the neutrino mixing angle $\theta_{13}$ using the data collected in 467.90 live days from a detector positioned at an average distance of 1050 m from two reactor cores at the Chooz nuclear power plant. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties with respect to previous publications, whereas the efficiency of the $\bar\nu_{e}$ signal has increased. The value of $\theta_{13}$ is measured to be $\sin^{2}2\theta_{13} = 0.090 ^{+0.032}_{-0.029}$ from a fit to the observed energy spectrum. Deviations from the reactor $\bar\nu_{e}$ prediction observed above a prompt signal energy of 4 MeV and possible explanations are also reported. A consistent value of $\theta_{13}$ is obtained from a fit to the observed rate as a function of the reactor power independently of the spectrum shape and background estimation, demonstrating the robustness of the $\theta_{13}$ measurement despite the observed distortion., Comment: 44 pages, 25 figures. Figures 21 and 22 have been replaced (statistical error bars for bins above 8 MeV have become smaller). No other changes in the results of the paper; an Erratum submitted to JHEP

Published
2014
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5. The trigger and timing system of the Double Chooz experiment

Author

Achim Stahl, F. Beissel, Martin Rosenthal, S. Roth, Anatael Cabrera, C. Kuhnt, D. Kryn, S. Lucht, J.V. Dawson, A. Stüken, B Reinhold, Christopher Wiebusch, A Cucoanes, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), RWTH Aachen University, University of Hawai‘i [Mānoa] (UHM), Physik-Department E15, Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Rheinisch-Westfälische Technische Hochschule Aachen University (RWTH)

Subjects
[PHYS]Physics [physics], Photomultiplier, Signal processing, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Computer science, business.industry, Clock signal, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), CHOOZ, 01 natural sciences, Signal, Data acquisition, 0103 physical sciences, 010306 general physics, business, Field-programmable gate array, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Instrumentation, Mathematical Physics, Computer hardware, ComputingMilieux_MISCELLANEOUS
Abstract

Modern precision neutrino experiments like Double Chooz require a highly efficient trigger system in order to reduce systematic uncertainties. The trigger and timing system of the Double Chooz experiment was designed according to this goal. The Double Chooz trigger system is driven by the basic idea of triggering on multiple thresholds according to the total visible energy and additionally triggering on the number of active photomultiplier tubes (PMTs) in the detector. To do so, the trigger system continuously monitors the analogue signals from all PMTs in the detector. The amplitudes of these PMT-signals are summed for groups of certain PMTs (group signals) and for all PMTs (sum signal), respectively. The group signals are discriminated by two thresholds for each input channel and four thresholds for the sum signal. The resulting signals are processed by the trigger logic unit which is implemented in a FPGA. In addition to the proper trigger, the trigger system provides a common clock signal for all subsequent data acquisition systems to guarantee a synchronous readout of the Double Chooz detectors. The present design of the system provides a high flexibility for the applied logic and settings, making it useful for experiments other than Double Chooz. The Double Chooz trigger and timing system was installed and commissioned in 2011. This article describes the hardware of the trigger and timing system. Furthermore the setup, implemented trigger logic and performance of the trigger and timing system for the Double Chooz experiment is presented.

Published
2013
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6. First test of Lorentz violation with a reactor-based antineutrino experiment

Author

V. Fischer, P. Novella, T. Sumiyoshi, J. L. Sida, Achim Stahl, Michael H. Shaevitz, G. Keefer, I. Ostrovskiy, A. Bernstein, H. Furuta, T.J.C. Bezerra, E. Damon, A. Onillon, G. Mention, Matthew L Strait, Michael Wurm, H. Watanabe, D. Greiner, D. Lhuillier, K. Nakajima, V. Zimmer, M. Cerrada, A. J. Franke, Z. Djurcic, P. Pfahler, J. Maeda, M. Göger-Neff, Takeo Kawasaki, Iuri Muniz Pepe, R. Gama, M. Bergevin, V. Sinev, M. Skorokhvatov, Bayarto Lubsandorzhiev, M. Röhling, Thierry Lasserre, Th. A. Mueller, G. Pronost, Stefan Roth, J. Reichenbacher, J.V. Dawson, Caren Hagner, J. M. López-Castaño, Muriel Fallot, T. Classen, J. Martino, Anatael Cabrera, Teppei Katori, Florian Kaether, Yu. Efremenko, Y. Kamyshkov, J. Felde, D. Franco, L. Camilleri, C. Palomares, Kazuhiro Terao, A. Stüken, F. Sato, M. Toups, Christopher Wiebusch, E. Conover, G. A. Valdiviesso, Yasushi Nagasaka, J. C. dos Anjos, J. Maricic, H. Miyata, Christian Buck, B. Rybolt, E. Caden, V. Durand, Yoshio Abe, D. McKee, Frank Hartmann, Anna Erickson, C. N. Maesano, F. Suekane, L.F.F. Stokes, C. Mariani, J. Haser, Josef Jochum, D. Dietrich, L. Bezrukhov, F. von Feilitzsch, Lindley Winslow, L. Oberauer, Lydie Giot, S. Dazeley, H. P. Lima, D. Shrestha, M. Elnimr, J. Spitz, C. Aberle, Ernesto Kemp, Stefan Schoppmann, J. Busenitz, Masahiro Kuze, Cécile Jollet, P. Chimenti, T. Matsubara, A. Remoto, A. Hatzikoutelis, H. H. Trinh Thi, R. Milincic, M. Franke, C. E. Lane, M. Ishitsuka, I. Stancu, M. Fechner, M. Worcester, T. Miletic, S. Habib, F. Yermia, M. Dracos, I. Gil-Botella, S. Perasso, C. Veyssiere, P. Perrin, A. Osborn, R. Roncin, Tobias Lachenmaier, Ying Sun, Tomoyuki Konno, Daniel M. Kaplan, A. Tonazzo, Stefan Schönert, John M. LoSecco, M. V. d'Agostino, S. V. Sukhotin, E. Smith, N. Haag, B. Reinhold, S. Lucht, M. Obolensky, G. A. Horton-Smith, L. N. Kalousis, C. L. Jones, Michael Hofmann, T. Schwetz, Luis González, Nathaniel Bowden, A. S. Cucoanes, Janet Conrad, W. Potzel, Manuel Meyer, B. R. White, J. Ebert, Sebastian Wagner, Manfred Lindner, Antoine Collin, E. Blucher, Maury Goodman, P.-J. Chang, K. Crum, E. Yanovitch, R. Carr, Alain Letourneau, D. Kryn, Anselmo Meregaglia, Amanda Porta, J. I. Crespo-Anadón, H. de Kerret, T. Hayakawa, T. Hara, R. Santorelli, J. Tm. Goon, Y. Sakamoto, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Double-CHOOZ, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Double Chooz Collaboration, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, 010308 nuclear & particles physics, Lorentz transformation, FOS: Physical sciences, Electron, Lorentz covariance, CHOOZ, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, symbols.namesake, High Energy Physics - Experiment (hep-ex), Sidereal time, 0103 physical sciences, symbols, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Neutrino oscillation, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Electron neutrino
Abstract

We present a search for Lorentz violation with 8249 candidate electron antineutrino events taken by the Double Chooz experiment in 227.9 live days of running. This analysis, featuring a search for a sidereal time dependence of the events, is the first test of Lorentz invariance using a reactor-based antineutrino source. No sidereal variation is present in the data and the disappearance results are consistent with sidereal time independent oscillations. Under the Standard-Model Extension (SME), we set the first limits on fourteen Lorentz violating coefficients associated with transitions between electron and tau flavor, and set two competitive limits associated with transitions between electron and muon flavor., Comment: 6 pages, 2 figures; (new version after referee's comments)

Published
2012
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7. Direct Measurement of Backgrounds using Reactor-Off Data in Double Chooz

Author

J. Maricic, A. Hourlier, Lydie Giot, Matthew L Strait, M. Röhling, A.V. Etenko, J. Ebert, Audrey Letourneau, R. Santorelli, Janet Conrad, I. Stancu, Sebastian Wagner, Manfred Lindner, H. Furuta, Antoine Collin, Daniel M. Kaplan, R. Roncin, E. Blucher, S. Schönert, M. Franke, Ying Sun, T. Hayakawa, S. Dazeley, M. D. Skorokhvatov, Michael Wurm, H. Watanabe, T. Sumiyoshi, T. Konno, D. Kryn, F. Suekane, L.F.F. Stokes, S. Roth, C. Veyssiere, T. Hara, M. Elnimr, B. K. Lubsandorzhiev, A. Bernstein, I. Ostrovskiy, W. Potzel, Th. A. Mueller, T. Miletic, S. Habib, S. M. Fernandes, D. Shrestha, Amanda Porta, R. Gama, Z. Djurcic, E. Damon, S. Perasso, H. Miyata, G. Mention, A. Onillon, A. Cucoanes, K. Nakajima, M. Worcester, Yuri Kamyshkov, D. McKee, Stefan Schoppmann, Christian Buck, Thierry Lasserre, F. Yermia, L. Camilleri, B. Rybolt, A. Remoto, Michael Hofmann, B. White, J. Spitz, P. Novella, J. C. Barriere, C. N. Maesano, D. Dietrich, C. Mariani, T. Kawasaki, Josef Jochum, V. V. Sinev, M. Göger-Neff, P.-J. Chang, V. Durand, A. Hatzikoutelis, P. Perrin, L. Bezrukhov, F. von Feilitzsch, Marcos Cerrada, E. Caden, H. P. Lima, V. Zimmer, David Lhuillier, Lothar Oberauer, J. Reichenbacher, Yasushi Nagasaka, Anatael Cabrera, M. Toups, J. T. M. Goon, A. J. Franke, J. L. Sida, C. Aberle, J. Busenitz, Masahiro Kuze, Anna Erickson, J. M. López-Castaño, J. Haser, S. Shimojima, Muriel Fallot, T. Classen, Michael Fechner, G. A. Horton-Smith, J.V. Dawson, I. M. Pepe, P. Chimenti, C. Palomares, J. M. LoSecco, G. Keefer, T. Matsubara, C. Langbrandtner, E. Kemp, Anselmo Meregaglia, Cécile Jollet, B. Reinhold, Florian Kaether, Y. Kibe, M. Ishitsuka, E. Conover, J. Felde, D. Franco, C. L. Jones, Lindley Winslow, H. H. Trinh Thi, J. Maeda, F. Hartmann, A. Stüken, F. Sato, R. Carr, D. Greiner, I. Gil-Botella, Tobias Lachenmaier, Kazuhiro Terao, L. Goodenough, R. Milincic, Robert Svoboda, Christopher Wiebusch, G. A. Valdiviesso, A. Tonazzo, M. C. Goodman, J. C. dos Anjos, Luis González, Nathaniel Bowden, Thomas Schwetz, Achim Stahl, Yoshio Abe, M. Obolensky, G. Pronost, H. de Kerret, L. N. Kalousis, T.J.C. Bezerra, P. Pfahler, C. E. Lane, A. Osborn, M. V. d'Agostino, S. V. Sukhotin, E. Smith, N. Haag, Manuel Meyer, Marcos Dracos, S. Lucht, V. Fischer, J. Martino, M. Bergevin, K. Crum, J. I. Crespo-Anadón, Y. Sakamoto, M. H. Shaevitz, Yu. Efremenko, Caren Hagner, APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucl'eaire, Atomique et de Spectroscopie, Université de Liège, Double-CHOOZ, Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Plasma Science and Fusion Center, Conrad, Janet, Jones, Christopher LaDon, Spitz, Joshua B., Terao, Yasuaki, Winslow, L., Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Particle physics, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Daya bay, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Cosmic ray, CHOOZ, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Nuclear Experiment (nucl-ex), 010306 general physics, Neutrino oscillation, Nuclear Experiment, Physics, Muon, 010308 nuclear & particles physics, Oscillation, Neutron temperature, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], 13. Climate action, High Energy Physics::Experiment, Neutrino
Abstract

Double Chooz is unique among modern reactor-based neutrino experiments studying ν¯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., United States. Dept. of Energy, National Science Foundation (U.S.)

Published
2012
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8. Reactor ν ̄e disappearance in the Double Chooz experiment

Author

G. Mention, M. Ishitsuka, Matthew L Strait, Tobias Lachenmaier, I. M. Pepe, Daniel M. Kaplan, S. V. Sukhotin, E. Smith, M. V. d'Agostino, H. Miyata, M. Kuze, E. Caden, N. Haag, Christian Buck, A. Hatzikoutelis, S. Dazeley, T. Kawasaki, E. Damon, A.V. Etenko, T. Konno, H. P. Lima, F. Suekane, L.F.F. Stokes, I. Stancu, H. Furuta, L.N. Kalousis, Yuri Kamyshkov, C. N. Maesano, Y. Sakamoto, M. Toups, T. Miletic, P. Novella, D. McKee, D. Dietrich, S. Perasso, J. Busenitz, P.-J. Chang, J. Haser, S. Shimojima, Lindley Winslow, F. Yermia, S. Lucht, G. A. Horton-Smith, Michael Hofmann, A. Bernstein, Anatael Cabrera, P. Perrin, Michael Fechner, David Lhuillier, A. Cucoanes, E. Conover, H. H. Trinh Thi, E. Kemp, Luis González, Nathaniel Bowden, Thomas Schwetz, B. White, T.J.C. Bezerra, A. Remoto, C. L. Jones, A. Onillon, C. Mariani, P. Chimenti, Kazuhiro Terao, Janet Conrad, Marcos Dracos, Josef Jochum, T. Matsubara, T. Hayakawa, I. Gil-Botella, J. Martino, L. Bezrukhov, M. Bergevin, V. V. Sinev, F. von Feilitzsch, M. Obolensky, A. Osborn, H. de Kerret, Christopher Wiebusch, M. D. Skorokhvatov, J. Ebert, Michael Wurm, H. Watanabe, Robert Svoboda, Sebastian Wagner, G. A. Valdiviesso, M. Röhling, D. Kryn, M. C. Goodman, K. Crum, Alain Letourneau, Yu. Efremenko, Manfred Lindner, Antoine Collin, E. Blucher, Zelimir Djurcic, A. Hourlier, Lydie Giot, Stefan Schoppmann, W. Potzel, Caren Hagner, J. I. Crespo-Anadón, R. Gama, Anselmo Meregaglia, M. H. Shaevitz, J. C. dos Anjos, J. M. López-Castaño, Yoshio Abe, Bayarto Lubsandorzhiev, S. Schönert, Lothar Oberauer, C. Palomares, Thierry Lasserre, G. Keefer, V. Zimmer, Muriel Fallot, T. Classen, J. C. Barriere, A. J. Franke, R. Carr, D. Greiner, P. Pfahler, C. E. Lane, L. Camilleri, Florian Kaether, Y. Kibe, F. Hartmann, J. Felde, D. Franco, J.V. Dawson, T. Sumiyoshi, A. Stahl, J. L. Sida, M. Cerrada, Amanda Porta, J. Maricic, A. Stüken, F. Sato, J. Reichenbacher, C. Veyssiere, R. Santorelli, J. Tm. Goon, D. Shrestha, J. Spitz, V. Durand, R. Roncin, Ying Sun, T. Hara, John M. LoSecco, M. Elnimr, R. Milincic, S. Roth, I. Ostrovskiy, M. Franke, Th. A. Mueller, K. Nakajima, C. Aberle, M. Worcester, Cécile Jollet, B. Reinhold, C. Langbrandtner, J. Maeda, A. Tonazzo, M. Göger-Neff, and Yasushi Nagasaka

Subjects
Physics, NOνA, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Detector, CHOOZ, 01 natural sciences, Spectral line, Nuclear physics, 0103 physical sciences, 010306 general physics, Neutrino oscillation, Electron neutrino
Abstract

The Double Chooz experiment has observed 8,249 candidate electron antineutrino events in 227.93 live days with 33.71 GW-ton-years (reactor power x detector mass x livetime) exposure using a 10.3 cubic meter fiducial volume detector located at 1050 m from the reactor cores of the Chooz nuclear power plant in France. The expectation in case of theta13 = 0 is 8,937 events. The deficit is interpreted as evidence of electron antineutrino disappearance. From a rate plus spectral shape analysis we find sin^2 2{\theta}13 = 0.109 \pm 0.030(stat) \pm 0.025(syst). The data exclude the no-oscillation hypothesis at 99.9% CL (3.1{\sigma}).

Published
2012

9. Indication of Reactorν¯eDisappearance in the Double Chooz Experiment

Author

A. Cucoanes, F. Ardellier, M. Obolensky, M. Dracos, H. de Kerret, D. Shrestha, R. Svoboda, C. L. Jones, J. Maeda, I. Ostrovskiy, R. Santorelli, A. Tonazzo, C. Jollet, M. Franke, A. F. Barbosa, T. Hayakawa, J. Tm. Goon, I. Gil-Botella, Daniel M. Kaplan, G. Keefer, J.V. Dawson, R. Milincic, Tobias Lachenmaier, C. E. Lane, B. Guillon, J. Reichenbacher, J. Spitz, M. Worcester, N. Tamura, M. Dierckxsens, M. Cribier, J. Haser, G. Mention, H. Miyata, M. Kuze, K. Nakajima, C. Langbrandtner, J. Hartnell, Z. Sun, Christian Buck, H. P. Lima, M. Cerrada, C. Aberle, Yasushi Nagasaka, S. Cormon, Muriel Fallot, T. Classen, E. Kemp, J. Busenitz, Janet Conrad, E. Damon, S. Perasso, S. Roth, C. N. Maesano, C. Mariani, Th. A. Mueller, E. Caden, A. Onillon, W. Potzel, T. Kawasaki, D. Dietrich, Matthew L Strait, A. Hatzikoutelis, M. D. Skorokhvatov, Michael Wurm, H. Watanabe, A. Bernstein, Florian Kaether, Y. Kibe, J. Felde, Z. Djurcic, A. Osborn, A. Milzstajn, D. Franco, C. Palomares, K. Zbiri, D. E. Reyna, S. M. Fernandes, Yu. Efremenko, M. Bongrand, Ying Sun, Alain Letourneau, L. Bezrukhov, T.J.C. Bezerra, U. Schwan, Kazuhiro Terao, Yuri Kamyshkov, F. von Feilitzsch, Caren Hagner, R. Gama, Amanda Porta, H. H. Trinh Thi, T. Miletic, P. Perrin, A. Meregaglia, D. Kryn, J. Maricic, Christopher Wiebusch, J. M. LoSecco, David Lhuillier, Lothar Oberauer, Bayarto Lubsandorzhiev, B. White, P.-J. Chang, Masaki Ishitsuka, E. Falk, M. Elnimr, Thierry Lasserre, V. V. Sinev, M. Göger-Neff, H. Furuta, G. A. Horton-Smith, M. C. Goodman, F. Yermia, V. Durand, Lindley Winslow, Anatael Cabrera, F. X. Hartmann, E. Yanovitch, Y. Sakamoto, H. A. Rubin, Michael Hofmann, B. Reinhold, F. Sato, M. H. Shaevitz, Luis González, Nathaniel Bowden, Thomas Schwetz, E. Conover, H. Tabata, J. C. dos Anjos, V. Zimmer, L.N. Kalousis, M. Toups, I. M. Pepe, A. Baxter, A. Stüken, Steven Dazeley, R. Carr, D. Greiner, Yoshio Abe, L. Camilleri, Lydie Giot, M. V. d'Agostino, J. Martino, Sebastian Wagner, Manfred Lindner, Antoine Collin, E. Blucher, M. Röhling, S. Schönert, Y. Endo, P. Pfahler, M. Fechner, P. Chimenti, A.V. Etenko, T. Matsubara, J. M. López-Castanõ, I. Stancu, S. J. M. Peeters, T. Akiri, Stefan Schoppmann, D. Mckee, T. Haruna, Yehan Liu, T. Konno, A. Remoto, F. Suekane, P. Novella, T. Sumiyoshi, D. Motta, T. Hara, A. Stahl, J. L. Sida, R. Queval, M. Bergevin, J. Jochum, K. Crum, A. J. Franke, S. V. Sukhotin, J. I. Crespo-Anadón, E. Smith, N. Haag, S. Lucht, and C. Veyssiere

Subjects
NOνA, Physics, Particle physics, Muon, 010308 nuclear & particles physics, General Physics and Astronomy, Flux, Daya Bay Reactor Neutrino Experiment, CHOOZ, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, 010306 general physics, Neutrino oscillation, Electron neutrino
Abstract

The Double Chooz experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. An observed-to-predicted ratio of events of 0.944±0.016(stat)±0.040(syst) was obtained in 101 days of running at the Chooz nuclear power plant in France, with two 4.25GWth reactors. The results were obtained from a single 10m3 fiducial volume detector located 1050 m from the two reactor cores. The reactor antineutrino flux prediction used the Bugey4 flux measurement after correction for differences in core composition. The deficit can be interpreted as an indication of a nonzero value of the still unmeasured neutrino mixing parameter sin⁡22θ13. Analyzing both the rate of the prompt positrons and their energy spectrum, we find sin⁡22θ13=0.086±0.041(stat)±0.030(syst), or, at 90% C.L., 0.017

Published
2012
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