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32 results on '"I, Ostrovskiy"'

1. Search for Majoron-emitting modes of Xe136 double beta decay with the complete EXO-200 dataset

Author

S. Al Kharusi, G. Anton, I. Badhrees, P. S. Barbeau, D. Beck, V. Belov, T. Bhatta, M. Breidenbach, T. Brunner, G. F. Cao, W. R. Cen, C. Chambers, B. Cleveland, M. Coon, A. Craycraft, T. Daniels, L. Darroch, S. J. Daugherty, J. Davis, S. Delaquis, A. Der Mesrobian-Kabakian, R. DeVoe, J. Dilling, A. Dolgolenko, M. J. Dolinski, J. Echevers, W. Fairbank, D. Fairbank, J. Farine, S. Feyzbakhsh, P. Fierlinger, D. Fudenberg, P. Gautam, R. Gornea, G. Gratta, C. Hall, E. V. Hansen, J. Hoessl, P. Hufschmidt, M. Hughes, A. Iverson, A. Jamil, C. Jessiman, M. J. Jewell, A. Johnson, A. Karelin, L. J. Kaufman, T. Koffas, R. Krücken, A. Kuchenkov, K. S. Kumar, Y. Lan, A. Larson, B. G. Lenardo, D. S. Leonard, G. S. Li, S. Li, Z. Li, C. Licciardi, Y. H. Lin, R. MacLellan, T. McElroy, T. Michel, B. Mong, D. C. Moore, K. Murray, O. Njoya, O. Nusair, A. Odian, I. Ostrovskiy, A. Perna, A. Piepke, A. Pocar, F. Retière, A. L. Robinson, P. C. Rowson, D. Ruddell, J. Runge, S. Schmidt, D. Sinclair, K. Skarpaas, A. K. Soma, V. Stekhanov, M. Tarka, S. Thibado, J. Todd, T. Tolba, T. I. Totev, R. Tsang, B. Veenstra, V. Veeraraghavan, P. Vogel, J.-L. Vuilleumier, M. Wagenpfeil, J. Watkins, M. Weber, L. J. Wen, U. Wichoski, G. Wrede, S. X. Wu, Q. Xia, D. R. Yahne, L. Yang, Y.-R. Yen, O. Ya. Zeldovich, and T. Ziegler

Subjects
010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, 01 natural sciences
Published
2021
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2. Imaging individual barium atoms in solid xenon for barium tagging in nEXO

Author

X. S. Jiang, A. Der Mesrobian-Kabakian, T. Tolba, S. Rescia, D. Fairbank, A. Piepke, Y. Y. Ding, O. Zeldovich, D. Kodroff, T. Daniels, J. Echevers, R. DeVoe, M. Hughes, Simon Johnston, R. Saldanha, O. Nusair, R. Krücken, Alexis G. Schubert, R. MacLellan, G. St-Hilaire, C. Chambers, I. J. Arnquist, Lorenzo Fabris, J.-L. Vuilleumier, N. Roy, Yuehe Lin, U. Wichoski, L. Cao, David Moore, B. T. Cleveland, John L. Orrell, S. Kravitz, F. Nolet, Veljko Radeka, Jens Dilling, B. Mong, M. Wagenpfeil, J. Dalmasson, T. Ziegler, J. P. Brodsky, T. Bhatta, P. C. Rowson, A.C. Odian, I. Badhrees, M. Heffner, Z. Li, Gerrit Wrede, D. Fudenberg, S. X. Wu, M. Tarka, F. Vachon, G. Li, Douglas H Beck, L. J. Wen, S. Parent, Samuele Sangiorgio, A. House, David Leonard, W. Cree, L. Darroch, J. Todd, G. Gallina, Y-R Yen, Thomas Koffas, W. M. Fairbank, I. Ostrovskiy, K. S. Kumar, D. A. Harris, X.L. Sun, J. B. Zhao, S. Delaquis, T. Stiegler, A. Kuchenkov, M. J. Dolinski, X. F. Wu, A. Larson, Yunyan Zhou, O. Njoya, E. V. Hansen, Giorgio Gratta, K. Skarpaas, Ethan Brown, A. Iverson, Triveni Rao, M. Weber, Shu Li, A. Karelin, P. Hufschmidt, David A. Sinclair, Wei Wu, R.J. Newby, T. Rossignol, M. J. Jewell, Qun-Yao Wang, Zhijun Ning, Y. Ito, L. J. Kaufman, Wei Wei, Rejean Fontaine, S. J. Daugherty, F. Bourque, Y. Lan, Liang Yang, R. Tsang, A. Jamil, S. Feyzbakhsh, C. Licciardi, W. R. Cen, R. Gornea, Guofu Cao, E. Raguzin, J. Farine, Eric W. Hoppe, Gerard Visser, A. Burenkov, T. Brunner, Arun Kumar Soma, Justin Albert, J. Watkins, V.N. Stekhanov, M. Coon, A. Pocar, Cory T. Overman, T. Tsang, A. Craycraft, Venkatesh Veeraraghavan, F. Retiere, Angelo Dragone, Jochen M. Schneider, Qing Xia, X. Zhang, M. Chiu, J. Hößl, P. S. Barbeau, G. S. Ortega, Jean-Francois Pratte, V. A. Belov, M. Oriunno, Serge A. Charlebois, T. I. Totev, K. Murray, Gisela Anton, T. Walton, J. Daughhetee, A. E. Robinson, K. Odgers, M. Côté, Thilo Michel, and Gabriele Giacomini

Subjects
Physics, Sapphire window, Multidisciplinary, 010308 nuclear & particles physics, Analytical chemistry, chemistry.chemical_element, Barium, 01 natural sciences, Particle identification, Background level, Xenon, chemistry, Double beta decay, 0103 physical sciences, Atom, Neutrino, 010306 general physics
Abstract

Author(s): Chambers, C; Walton, T; Fairbank, D; Craycraft, A; Yahne, DR; Todd, J; Iverson, A; Fairbank, W; Alamare, A; Albert, JB; Anton, G; Arnquist, IJ; Badhrees, I; Barbeau, PS; Beck, D; Belov, V; Bhatta, T; Bourque, F; Brodsky, JP; Brown, E; Brunner, T; Burenkov, A; Cao, GF; Cao, L; Cen, WR; Charlebois, SA; Chiu, M; Cleveland, B; Coon, M; Cree, W; Cote, M; Dalmasson, J; Daniels, T; Darroch, L; Daugherty, SJ; Daughhetee, J; Delaquis, S; Mesrobian-Kabakian, A Der; DeVoe, R; Dilling, J; Ding, YY; Dolinski, MJ; Dragone, A; Echevers, J; Fabris, L; Farine, J; Feyzbakhsh, S; Fontaine, R; Fudenberg, D; Giacomini, G; Gornea, R; Gratta, G; Hansen, EV; Heffner, M; Hoppe, EW; Hosl, J; House, A; Hufschmidt, P; Hughes, M; Ito, Y; Jamil, A; Jessiman, C; Jewell, MJ; Jiang, XS; Karelin, A; Kaufman, LJ; Kodroff, D; Koffas, T; Kravitz, S; Krucken, R; Kuchenkov, A; Kumar, KS; Lan, Y; Larson, A; Leonard, DS; Li, G; Li, S; Li, Z; Licciardi, C; Lin, YH; Lv, P; MacLellan, R; Michel, T; Mong, B; Moore, DC | Abstract: The search for neutrinoless double beta decay probes the fundamental properties of neutrinos, including whether or not the neutrino and antineutrino are distinct. Double beta detectors are large and expensive, so background reduction is essential for extracting the highest sensitivity. The identification, or 'tagging', of the $^{136}$Ba daughter atom from double beta decay of $^{136}$Xe provides a technique for eliminating backgrounds in the nEXO neutrinoless double beta decay experiment. The tagging scheme studied in this work utilizes a cryogenic probe to trap the barium atom in solid xenon, where the barium atom is tagged via fluorescence imaging in the solid xenon matrix. Here we demonstrate imaging and counting of individual atoms of barium in solid xenon by scanning a focused laser across a solid xenon matrix deposited on a sapphire window. When the laser sits on an individual atom, the fluorescence persists for $\sim$30~s before dropping abruptly to the background level, a clear confirmation of one-atom imaging. No barium fluorescence persists following evaporation of a barium deposit to a limit of $\leq$0.16\%. This is the first time that single atoms have been imaged in solid noble element. It establishes the basic principle of a barium tagging technique for nEXO.

Published
2019
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3. Measurement of the Spectral Shape of the β -Decay of Xe137 to the Ground State of Cs137 in EXO-200 and Comparison with Theory

Author

T. Tolba, E. V. Hansen, Qing Xia, A. Jamil, A. Pocar, S. Thibado, V. Veeraraghavan, C. Chambers, R. DeVoe, Petr Vogel, David Leonard, R. MacLellan, Thomas Koffas, D. Fudenberg, W. M. Fairbank, M. Coon, J. Davis, M. J. Jewell, T. Daniels, F. Retiere, V.N. Stekhanov, L. J. Kaufman, J. Farine, Jouni Suhonen, A. Piepke, J. Todd, R. Tsang, M. J. Dolinski, Jens Dilling, O. Nusair, L. Darroch, R. Krücken, U. Wichoski, M. Hughes, I. Badhrees, K. Skarpaas, J. Hoessl, V. Belov, A. Robinson, T. Bhatta, A. S. Johnson, T. Ziegler, S. Feyzbakhsh, W. R. Cen, K. Murray, S. Al Kharusi, O. Ya. Zeldovich, G. S. Li, R. Gornea, Martin Breidenbach, M. Wagenpfeil, Gisela Anton, P. Hufschmidt, David A. Sinclair, P. C. Rowson, S. X. Wu, B. Mong, J. L. Vuilleumier, Arun Kumar Soma, C. Licciardi, A. Der Mesrobian-Kabakian, Yuehe Lin, S. J. Daugherty, A. Odian, L. Yang, David Moore, Y. Lan, S. Delaquis, Z. Li, Guofu Cao, Giorgio Gratta, A. Larson, T. Brunner, C. R. Hall, A. Dolgolenko, Thilo Michel, C. Jessiman, I. Ostrovskiy, P. Nakarmi, A. Craycraft, K. S. Kumar, B. T. Cleveland, A. Kuchenkov, O. Njoya, B. G. Lenardo, J. Watkins, A. Iverson, D. R. Yahne, T. McElroy, A. Karelin, Shu Li, S. Schmidt, L. J. Wen, Marc Weber, D. Fairbank, B. Veenstra, J. Kostensalo, J. Echevers, Peter Fierlinger, T. I. Totev, Gerrit Wrede, M. Tarka, Douglas H Beck, P. S. Barbeau, Y-R Yen, D. Ruddell, J. Runge, and P. Gautam

Subjects
Physics, Spectral shape analysis, General Physics and Astronomy, Nuclear data, Context (language use), Electron, 7. Clean energy, 01 natural sciences, Spectral line, 0103 physical sciences, Neutron source, Atomic physics, 010306 general physics, Ground state, Energy (signal processing)
Abstract

We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden nonunique β-decay transition ^{137}Xe(7/2^{-})→^{137}Cs(7/2^{+}). The experimental data were acquired by the EXO-200 experiment during a deployment of an AmBe neutron source. The ultralow background environment of EXO-200, together with dedicated source deployment and analysis procedures, allowed for collection of a pure sample of the decays, with an estimated signal to background ratio of more than 99 to 1 in the energy range from 1075 to 4175 keV. In addition to providing a rare and accurate measurement of the first-forbidden nonunique β-decay shape, this work constitutes a novel test of the calculated electron spectral shapes in the context of the reactor antineutrino anomaly and spectral bump.

Published
2020
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4. First search for dyons with the full MoEDAL trapping detector in 13 TeV pp collisions

Author

M. M. Mieskolainen, S. Cecchini, Jack A. Tuszynski, Stanislav Pospisil, V. Togo, B. Parker, Oscar Vives, Jean Alexandre, Sagari Sarkar, Arttu Rajantie, Anthony Eric Lionti, Y. M. Cho, M. Tenti, K. Sliwa, Giuseppe Levi, D. Felea, D. Lacarrere, V. Popa, Z. Sahnoun, Philippe Mermod, Michal Suk, M. de Montigny, Judita Mamuzic, A. Upreti, Claude Leroy, L. Patrizii, M. Pozzato, James Pinfold, Matti Kalliokoski, L. A. Popa, A. Korzenev, Jose Bernabeu, G. Sirri, Arka Santra, Michael Staelens, Maurizio Spurio, Vasiliki A Mitsou, John Ellis, Joannis Papavassiliou, Annarita Margiotta, L. Millward, M. Campbell, R. Soluk, A. Wall, P. Burian, A. Shaa, Malcolm Fairbairn, Bobby Samir Acharya, R. Orava, Mariana Frank, I. Ostrovskiy, N. Mauri, A. De Roeck, Nick E. Mavromatos, Adrian John Bevan, Jonathan Michael Hays, Horea Branzas, J. Janecek, Petr Beneš, P.-P. Ouimet, Vicente Vento, Roberto Ruiz de Austri, A. Maulik, G.E. Păvălaş, M. El Sawy, Benedikt Bergmann, Ann M. Hirt, Gordon W. Semenoff, Mairi Sakellariadou, Department of Physics, Science and Technology Facilities Council (STFC), Acharya, B., Alexandre, J., Benes, P., Bergmann, B., Bernabéu, J., Bevan, A., Branzas, H., Burian, P., Campbell, M., Cecchini, S., Cho, Y. M., de Montigny, M., De Roeck, A., Ellis, J. R., El Sawy, M., Fairbairn, M., Felea, D., Frank, M., Hays, J., Hirt, A. M., Janecek, J., Kalliokoski, M., Korzenev, A., Lacarrère, D. H., Leroy, C., Levi, G., Lionti, A., Mamuzic, J., Maulik, A., Margiotta, A., Mauri, N., Mavromatos, N. E., Mermod, P., Mieskolainen, M., Millward, L., Mitsou, V. A., Orava, R., Ostrovskiy, I., Ouimet, P.-P., Papavassiliou, J., Parker, B., Patrizii, L., Păvălaş, G. E., Pinfold, J. L., Popa, L. A., Popa, V., Pozzato, M., Pospisil, S., Rajantie, A., Ruiz de Austri, R., Sahnoun, Z., Sakellariadou, M., Santra, A., Sarkar, S., Semenoff, G., Shaa, A., Sirri, G., Sliwa, K., Soluk, R., Spurio, M., Staelens, M., Suk, M., Tenti, M., Togo, V., Tuszyński, J. A., Upreti, A., Vento, V., Vives, O., and Wall, A.

Subjects
General Physics, MoEDAL, electric and magnetic charge, dyon, Physics, Multidisciplinary, Magnetic monopole, FOS: Physical sciences, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Electric charge, 114 Physical sciences, MoEDAL Collaboration, 09 Engineering, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), MAGNETIC MONOPOLES, STOPPING-POWER, law, 0103 physical sciences, PARTICLES, 010306 general physics, 01 Mathematical Sciences, Particle Physics - Phenomenology, Physics, Range (particle radiation), Large Hadron Collider, Science & Technology, 02 Physical Sciences, hep-ex, Detector, Persistent current, hep-ph, SQUID, High Energy Physics - Phenomenology, Dyon, Physical Sciences, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

The MoEDAL trapping detector, consists of approximately 800 kg of aluminium volumes. It was exposed during Run-2 of the LHC program to 6.46 fb^-1 of 13 TeV proton-proton collisions at the LHCb interaction point. Evidence for dyons (particles with electric and magnetic charge) captured in the trapping detector was sought by passing the aluminium volumes comprising the detector through a SQUID magnetometer. The presence of a trapped dyon would be signalled by a persistent current induced in the SQUID magnetometer. On the basis of a Drell-Yan production model, we exclude dyons with a magnetic charge ranging up to 5 Dirac charges, and an electric charge up to 200 times the fundamental electric charge for mass limits in the range 790 - 3130 GeV., arXiv admin note: text overlap with arXiv:1903.08491

Published
2020

5. Solar neutrino detection sensitivity in DARWIN via electron scattering

Author

J. J. Cuenca-García, G. Volta, C. Hils, M. L. Benabderrahmane, M. P. Decowski, Ethan Brown, V. C. Antochi, Manfred Lindner, G. Iaquaniello, J. Mahlstedt, Yuehuan Wei, Michelle Galloway, A. Manfredini, Joachim Wolf, H. Schulze Eißing, S. Stern, D. Giovagnoli, M. Kleifges, K. Thieme, P. Di Gangi, S. Brünner, D. Douillet, T. Zhu, F. D. Amaro, Guillaume Plante, G. Khundzakishvili, Ch. Bourgeois, L. Scotto Lavina, Ferenc Glück, Kaixuan Ni, J. Pienaar, F. Toennies, Hardy Simgen, A. D. Ferella, C. Therreau, W. Shen, K. Eitel, Jelle Aalbers, D. Wenz, Bojan Milosevic, G. Koltmann, M. Clark, J. Howlett, A. Terliuk, Roberto Trotta, S. Milutinovic, P. Sanchez-Lucas, Sara Diglio, M. Balzer, Ch. Weinheimer, P. A. Breur, K. Odgers, R. Meyer, A. Depoian, F. Girard, M. Murra, Amos Breskin, H. Fischer, G. Sartorelli, Julien Masbou, I. Ostrovskiy, M. Selvi, T. Marrodán Undagoitia, P. Meinhardt, Biljana Antunović, J. Kellerer, Laura Baudis, Michael Wurm, L. Grandi, D. Baur, T. K. Kleiner, H. Landsman, A. Bismark, D. Ramírez García, L. Althueser, P. Gaemers, A. Kopec, A. Molinario, Y. Zhu, A. Loya Villalpando, M. Keller, Y. Mosbacher, Y. Ma, Mila Pandurovic, Andreas Kopmann, Ralph Engel, Jean-Pierre Cussonneau, Guido Drexlin, Kai Zuber, P. Szabo, Bart Pelssers, J. Qin, Y. Biondi, J.M.F. dos Santos, D. Masson, N. Rupp, F. Kuger, Giacomo Bruno, P. Shagin, J. A. M. Lopes, F. Agostini, Uwe Oberlack, L. LaCascio, C. Tunnell, S. Hansmann-Menzemer, Bernhard Holzapfel, Y. Xing, R. Größle, Sebastian Lindemann, J. Palacio, C. Wittweg, S. Wuestling, D. Vorkapic, M. Obradovic, Benjamin Kilminster, J. R. Angevaare, D. Schulte, Manuel Gameiro da Silva, Steffen Grohmann, Marc Weber, J. Qi, W. Fulgione, Eef Masson, J. P. Zopounidis, C.M.B. Monteiro, Jan Conrad, A. Di Giovanni, S. Reichard, R. Glade-Beucke, Lawrence M. Krauss, M. Weiss, M. Steidl, D. Cichon, D. Thers, J. Dierle, S. Sharma, Elena Aprile, João Cardoso, M. Pierre, R. F. Lang, R. Gumbsheimer, F. Gao, April S. Brown, N. McFadden, H-C. Schultz-Coulon, E. Erdal, F. Arneodo, C. Macolino, F. Lombardi, V. Pizzella, Volker Hannen, Peter Fischer, F. Jörg, C. Capelli, K. Morå, R. Budnik, M. Alfonsi, Kathrin Valerius, S. E. M. Ahmed Maouloud, E. Morteau, Lior Arazi, Marc Schumann, R. Peres, D. Subotic, A. P. Colijn, Jayden L. Newstead, Aalbers, J., Agostini, F., Maouloud, S. E. M. Ahmed, Alfonsi, M., Althueser, L., Amaro, F. D., Angevaare, J., Antochi, V. C., Antunovic, B., Aprile, E., Arazi, L., Arneodo, F., Balzer, M., Baudis, L., Baur, D., Benabderrahmane, M. L., Biondi, Y., Bismark, A., Bourgeois, C., Breskin, A., Breur, P. A., Brown, A., Brown, E., Brünner, S., Bruno, G., Budnik, R., Capelli, C., Cardoso, J., Cichon, D., Clark, M., Colijn, A. P., Conrad, J., Cuenca-García, J. J., Cussonneau, J. P., Decowski, M. P., Depoian, A., Dierle, J., Gangi, P. Di, Giovanni, A. Di, Diglio, S., Douillet, D., Drexlin, G., Eitel, K., Engel, R., Erdal, E., Ferella, A. D., Fischer, H., Fischer, P., Fulgione, W., Gaemers, P., Galloway, M., Gao, F., Giovagnoli, D., Girard, F., Glade-Beucke, R., Glück, F., Grandi, L., Grohmann, S., Größle, R., Gumbsheimer, R., Hannen, V., Hansmann-Menzemer, S., Hils, C., Holzapfel, B., Howlett, J., Iaquaniello, G., Jörg, F., Keller, M., Kellerer, J., Khundzakishvili, G., Kilminster, B., Kleifges, M., Kleiner, T. K., Koltmann, G., Kopec, A., Kopmann, A., Krauss, L. M., Kuger, F., LaCascio, L., Landsman, H., Lang, R. F., Lindemann, S., Lindner, M., Lombardi, F., Lopes, J. A. M., Villalpando, A. Loya, Ma, Y., Macolino, C., Mahlstedt, J., Manfredini, A., Undagoitia, T. Marrodán, Masbou, J., Masson, D., Masson, E., McFadden, N., Meinhardt, P., Meyer, R., Milosevic, B., Milutinovic, S., Molinario, A., Monteiro, C. M. B., Morå, K., Morteau, E., Mosbacher, Y., Murra, M., Newstead, J. L., Ni, K., Oberlack, U. G., Obradovic, M., Odgers, K., Ostrovskiy, I., Palacio, J., Pandurovic, M., Pelssers, B., Peres, R., Pienaar, J., Pierre, M., Pizzella, V., Plante, G., Qi, J., Qin, J., García, D. Ramírez, Reichard, S. E., Rupp, N., Sanchez-Lucas, P., dos Santos, J. M. F., Sartorelli, G., Schulte, D., Schultz-Coulon, H. C., Schulze Eißing, H., Schumann, M., Lavina, L. Scotto, Selvi, M., Shagin, P., Sharma, S., Shen, W., Silva, M., Simgen, H., Steidl, M., Stern, S., Subotic, D., Szabo, P., Terliuk, A., Therreau, C., Thers, D., Thieme, K., Toennies, F., Trotta, R., Tunnell, C. D., Valerius, K., Volta, G., Vorkapic, D., Weber, M., Wei, Y., Weinheimer, C., Weiss, M., Wenz, D., Wittweg, C., Wolf, J., Wuestling, S., Wurm, M., Xing, Y., Zhu, T., Zhu, Y., Zopounidis, J. P., Zuber, K., Oskar Klein Centre [Stockholm], Stockholm University, University of Bologna, Johannes Gutenberg - Universität Mainz (JGU), Westfälische Wilhelms-Universität Münster (WWU), Columbia University [New York], Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), DARWIN, Science and Technology Facilities Council (STFC), IoP (FNWI), XENON (IHEF, IoP, FNWI), and DARWIN Collaboration

Subjects
electron, Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), neutrino: solar, Physics::Instrumentation and Detectors, Solar neutrino, elastic scattering, Elementary particle, 7. Clean energy, 01 natural sciences, neutrino: flux, High Energy Physics - Experiment, Physics, Particles & Fields, XENON, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], physics.ins-det, Physics, xenon: liquid, Weinberg angle, double-beta decay, hep-ph, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, Massless particle, observatory, High Energy Physics - Phenomenology, neutrino: detector, Astrophysics - Solar and Stellar Astrophysics, Neutrino detector, Physical Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, ddc:620, Neutrino, model: solar, astro-ph.SR, boron: nuclide, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, lcsh:Astrophysics, Nuclear physics, oxygen: nuclide, Settore FIS/05 - Astronomia e Astrofisica, Double beta decay, nitrogen: nuclide, neutrino nucleus: elastic scattering, lcsh:QB460-466, 0103 physical sciences, electron: recoil: energy, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, 0206 Quantum Physics, Engineering (miscellaneous), Engineering & allied operations, Solar and Stellar Astrophysics (astro-ph.SR), Science & Technology, hep-ex, 010308 nuclear & particles physics, beryllium: nuclide, sensitivity, Neutrino, Sun, Dark Matter, Direct Detection, Xenon, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], lcsh:QC770-798, High Energy Physics::Experiment, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Lepton
Abstract

We detail the sensitivity of the liquid xenon (LXe) DARWIN observatory to solar neutrinos via elastic electron scattering. We find that DARWIN will have the potential to measure the fluxes of five solar neutrino components: $pp$, $^7$Be, $^{13}$N, $^{15}$O and $pep$. The precision of the $^{13}$N, $^{15}$O and $pep$ components is hindered by the double-beta decay of $^{136}$Xe and, thus, would benefit from a depleted target. A high-statistics observation of $pp$ neutrinos would allow us to infer the values of the weak mixing angle, $\sin^2\theta_w$, and the electron-type neutrino survival probability, $P_e$, in the electron recoil energy region from a few keV up to 200 keV for the first time, with relative precision of 5% and 4%, respectively, at an exposure of 300 ty. An observation of $pp$ and $^7$Be neutrinos would constrain the neutrino-inferred solar luminosity down to 0.2%. A combination of all flux measurements would distinguish between the high (GS98) and low metallicity (AGS09) solar models with 2.1-2.5$\sigma$ significance, independent of external measurements from other experiments or a measurement of $^8$B neutrinos through coherent elastic neutrino-nucleus scattering in DARWIN. Finally, we demonstrate that with a depleted target DARWIN may be sensitive to the neutrino capture process of $^{131}$Xe., Comment: 9 pages, 4 figures; for associated data files, see https://github.com/Physik-Institut-UZH/DARWIN-Sensitivity-Studies/tree/master/solar_neutrinos_electron_scattering

Published
2020
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6. Event Reconstruction in a Liquid Xenon Time Projection Chamber with an Optically-Open Field Cage

Author

B. Chana, N. Roy, L. Cao, O. Nusair, G. St-Hilaire, Douglas H Beck, R. Krücken, F. Nolet, E. Raguzin, P. A. Breur, T. McElroy, T. Bhatta, L. J. Kaufman, Gerard Visser, D. Goeldi, M. Coon, Eric W. Hoppe, F. Vachon, Z. Li, C. Chambers, Veljko Radeka, Cory T. Overman, L. J. Wen, J. L. Vuilleumier, Samuele Sangiorgio, L. Darroch, P. Gautam, P. Nakarmi, Kaixuan Ni, K. S. Kumar, A. De St. Croix, R. Tsang, Haijun Yang, E. V. Hansen, P. Lv, E. Caden, S. X. Wu, J. Hößl, P. S. Barbeau, Lorenzo Fabris, I. J. Arnquist, R. Gornea, P. C. Rowson, V.N. Stekhanov, X. S. Jiang, C. Licciardi, A. Jamil, A. House, A. Piepke, J. Todd, G. Gallina, S. Thibado, Y. Y. Ding, A. Der Mesrobian-Kabakian, N. Massacret, M. Heffner, R. MacLellan, S. Viel, M. Worcester, Thilo Michel, V. Veeraraghavan, Qing Xia, M. Hughes, G. Li, Sergio Ferrara, S. Al Kharusi, R. DeVoe, A. Pocar, M. Walent, B. G. Lenardo, Arun Kumar Soma, S. Feyzbakhsh, Y. Lan, G. S. Ortega, B. T. Cleveland, K. Deslandes, T. Brunner, A. Kuchenkov, M. Medina-Peregrina, Serge A. Charlebois, F. Retiere, David Moore, M. Chiu, J. P. Brodsky, M. Tarka, F. Edaltafar, T. Wager, K. G. Leach, Wei Wu, R.J. Newby, Qun-Yao Wang, Zhijun Ning, M. Oriunno, Aleksey E. Bolotnikov, K. Murray, Gisela Anton, K. Odgers, B. Mong, M. J. Dolinski, David Leonard, Thomas Koffas, W. M. Fairbank, T. Tsang, T. Stiegler, Jean-Francois Pratte, Angelo Dragone, M. Elbeltagi, John L. Orrell, T. Daniels, Wei Wei, H. Rasiwala, I. Ostrovskiy, Yu-Guang Zhou, S. Rescia, D. Fairbank, Guofu Cao, Mike Richman, O. Njoya, T. I. Totev, A. Iverson, K. Skarpaas Viii, Shu Li, Giorgio Gratta, U. Wichoski, L. Yang, T. Rossignol, M. J. Jewell, A. Craycraft, T. Ziegler, Gabriele Giacomini, J. Echevers, Jens Dilling, C.R. Natzke, I. Badhrees, A. Tidball, M. L. di Vacri, C. Vivo-Vilches, S. Parent, A. Odian, O. Zeldovich, R. Saldanha, M. Wagenpfeil, J. Dalmasson, X.L. Sun, J. B. Zhao, X. F. Wu, A. Larson, Ethan Brown, A. Karelin, J. Farine, V. Belov, and A. Robinson

Subjects
Physics, Nuclear and High Energy Physics, Scintillation, Photon, Time projection chamber, Physics - Instrumentation and Detectors, Field (physics), 010308 nuclear & particles physics, chemistry.chemical_element, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, Xenon, chemistry, Double beta decay, Ionization, 0103 physical sciences, Atomic physics, 010306 general physics, Instrumentation, Event reconstruction
Abstract

nEXO is a proposed tonne-scale neutrinoless double beta decay ($0\nu\beta\beta$) experiment using liquid ${}^{136}Xe$ (LXe) in a Time Projection Chamber (TPC) to read out ionization and scintillation signals. Between the field cage and the LXe vessel, a layer of LXe ("skin" LXe) is present, where no ionization signal is collected. Only scintillation photons are detected, owing to the lack of optical barrier around the field cage. In this work, we show that the light originating in the skin LXe region can be used to improve background discrimination by 5% over previous published estimates. This improvement comes from two elements. First, a fraction of the $\gamma$-ray background is removed by identifying light from interactions with an energy deposition in the skin LXe. Second, background from ${}^{222}Rn$ dissolved in the skin LXe can be efficiently rejected by tagging the $\alpha$ decay in the ${}^{214}Bi-{}^{214}Po$ chain in the skin LXe., Comment: 11 pages, 12 figures

Published
2020
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7. Measurements of electron transport in liquid and gas Xenon using a laser-driven photocathode

Author

R. Saldanha, I. Ostrovskiy, D. Kodroff, M. J. Dolinski, S. Rescia, John L. Orrell, T. Daniels, P. Gautam, D. Fairbank, Z. Li, E. Caden, E. V. Hansen, Gerard Visser, J. Watkins, Mike Richman, O. Njoya, R. MacLellan, He-Run Yang, A. Iverson, Triveni Rao, K. Skarpaas Viii, Liang Yang, R. Tsang, Gabriele Giacomini, A. Jamil, Pengpeng Lv, O. Nusair, R. Krücken, Shu Li, J. Echevers, Yu-Guang Zhou, Sergio Ferrara, B. Chana, Y. Lan, M. L. di Vacri, U. Wichoski, T. Wager, J. P. Brodsky, C. Vivo-Vilches, I. J. Arnquist, D. Beck, Thilo Michel, Y-R Yen, T. Tsang, T. Tolba, J. Runge, Yuehe Lin, T. Ziegler, Qun-Yao Wang, P. Nakarmi, Guofu Cao, M. Hughes, Jens Dilling, R. Fontaine, David Leonard, M. Heffner, Angelo Dragone, J. L. Vuilleumier, M. Walent, S. Al Kharusi, I. Badhrees, M. Tarka, Thomas Koffas, W. M. Fairbank, B. G. Lenardo, S. Viel, Arun Kumar Soma, T. Brunner, D. Goeldi, L. J. Kaufman, T. Stiegler, Samuele Sangiorgio, Xuan Wu, K. S. Kumar, S. Parent, M. Elbeltagi, M. Coon, K. G. Leach, David Moore, Wei Wei, Qing Xia, J. Farine, G. S. Ortega, Cory T. Overman, Wei Wu, R.J. Newby, P. C. Rowson, S. X. Wu, S. J. Daugherty, Serge A. Charlebois, A. House, G. St-Hilaire, S. Feyzbakhsh, P. S. Barbeau, A. Robinson, T. Bhatta, V. A. Belov, A.C. Odian, O. Zeldovich, Eric W. Hoppe, A. Piepke, J. Todd, L. Darroch, Y. Y. Ding, M. Oriunno, C. Chambers, A. Pocar, V.N. Stekhanov, B. T. Cleveland, T. Rossignol, A. Kuchenkov, M. J. Jewell, Veljko Radeka, X. S. Jiang, C. Licciardi, G. Gallina, A. Der Mesrobian-Kabakian, V. Veeraraghavan, A. Fucarino, Giorgio Gratta, M. Chiu, K. Murray, Gisela Anton, K. Odgers, E. Raguzin, J. Hossl, R. DeVoe, W. R. Cen, M. Medina-Peregrina, R. Gornea, F. Retiere, B. Mong, M. Wagenpfeil, J. Dalmasson, M. Ward, G. S. Li, X.L. Sun, J. B. Zhao, A. Larson, A. Craycraft, Ethan Brown, C.R. Natzke, A. Karelin, Jean-Francois Pratte, Z. Ning, T. I. Totev, A. De St. Croix, Lorenzo Fabris, N. Roy, L. Cao, F. Nolet, T. McElroy, F. Vachon, L. J. Wen, and Marc Weber

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, chemistry.chemical_element, Electron, medicine.disease_cause, 7. Clean energy, 01 natural sciences, Photocathode, Xenon, Electric field, 0103 physical sciences, medicine, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation, Nuclear Experiment, Physics, Argon, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), Photoelectric effect, chemistry, Quantum efficiency, High Energy Physics::Experiment, Atomic physics, Ultraviolet
Abstract

Measurements of electron drift properties in liquid and gaseous xenon are reported. The electrons are generated by the photoelectric effect in a semi-transparent gold photocathode driven in transmission mode with a pulsed ultraviolet laser. The charges drift and diffuse in a small chamber at various electric fields and a fixed drift distance of 2.0 cm. At an electric field of 0.5 kV/cm, the measured drift velocities and corresponding temperature coefficients respectively are 1 . 97 ± 0 . 04 m m ∕ μ s and ( − 0 . 69 ± 0 . 05 ) %/K for liquid xenon, and 1 . 42 ± 0 . 03 m m ∕ μ s and ( + 0 . 11 ± 0 . 01 ) %/K for gaseous xenon at 1.5 bar. In addition, we measure longitudinal diffusion coefficients of 25 . 7 ± 4 . 6 cm 2 /s and 149 ± 23 cm 2 /s, for liquid and gas, respectively. The quantum efficiency of the gold photocathode is studied at the photon energy of 4.73 eV in liquid and gaseous xenon, and vacuum. These charge transport properties and the behavior of photocathodes in a xenon environment are important in designing and calibrating future large scale noble liquid detectors.

Published
2019

8. Search for Neutrinoless Double-Beta Decay with the Complete EXO-200 Dataset

Author

D. R. Yahne, B. T. Cleveland, A. Kuchenkov, V.N. Stekhanov, C. Chambers, J. Watkins, J. Farine, C. R. Hall, A. Dolgolenko, D. Fudenberg, A. Craycraft, Peter Fierlinger, Gerrit Wrede, M. Tarka, J. Hoessl, Jens Dilling, D. Ruddell, V. Belov, I. Badhrees, L. Darroch, R. MacLellan, A. Robinson, A. Karelin, Qing Xia, Thilo Michel, J. Runge, Yuehe Lin, A. Odian, M. Hughes, R. DeVoe, M. Wagenpfeil, U. Wichoski, L. J. Kaufman, I. Ostrovskiy, Z. Li, B. G. Lenardo, Petr Vogel, A. Pocar, T. Ziegler, M. Danilov, T. Brunner, David Leonard, Giorgio Gratta, A. Piepke, J. Todd, A. Larson, O. Nusair, R. Krücken, P. S. Barbeau, O. Njoya, Thomas Koffas, K. S. Kumar, S. X. Wu, David Moore, J. L. Vuilleumier, W. M. Fairbank, O. Ya. Zeldovich, A. Iverson, M. J. Dolinski, P. Gautam, Shu Li, S. Schmidt, J. Davis, C. Jessiman, W. R. Cen, B. Mong, Y. Lan, R. Gornea, E. V. Hansen, T. Tolba, M. J. Jewell, F. Retiere, A. S. Johnson, Liang Yang, A. Jamil, M. Coon, Douglas H Beck, T. Daniels, Guofu Cao, Y-R Yen, S. Feyzbakhsh, Arun Kumar Soma, G. S. Li, P. Hufschmidt, David A. Sinclair, D. Fairbank, C. Licciardi, A. Der Mesrobian-Kabakian, J. Echevers, B. Veenstra, T. I. Totev, T. McElroy, L. J. Wen, Marc Weber, Martin Breidenbach, S. J. Daugherty, T. Bhatta, V. Veeraraghavan, K. Murray, Gisela Anton, P. C. Rowson, and S. Delaquis

Subjects
Physics, Q value, Resolution (electron density), Detector, General Physics and Astronomy, FOS: Physical sciences, 01 natural sciences, Lower limit, ddc, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Sensitivity (control systems), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Energy (signal processing)
Abstract

A search for neutrinoless double-beta decay ($0\nu\beta\beta$) in $^{136}$Xe is performed with the full EXO-200 dataset using a deep neural network to discriminate between $0\nu\beta\beta$ and background events. Relative to previous analyses, the signal detection efficiency has been raised from 80.8% to 96.4$\pm$3.0% and the energy resolution of the detector at the Q-value of $^{136}$Xe $0\nu\beta\beta$ has been improved from $\sigma/E=1.23\%$ to $1.15\pm0.02\%$ with the upgraded detector. Accounting for the new data, the median 90% confidence level $0\nu\beta\beta$ half-life sensitivity for this analysis is $5.0 \cdot 10^{25}$ yr with a total $^{136}$Xe exposure of 234.1 kg$\cdot$yr. No statistically significant evidence for $0\nu\beta\beta$ is observed, leading to a lower limit on the $0\nu\beta\beta$ half-life of $3.5\cdot10^{25}$ yr at the 90% confidence level., Comment: v1, 7 pages, 5 figures; v2, fix references; v3, update to accepted version

Published
2019

9. Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment

Author

E. V. Hansen, D. Fudenberg, Liang Yang, A. Jamil, M. J. Jewell, L. Darroch, M. Wagenpfeil, Giorgio Gratta, M. J. Dolinski, P. Hufschmidt, David A. Sinclair, G. S. Li, Thilo Michel, D. Fairbank, J. L. Vuilleumier, M. Hughes, T. Bhatta, R. MacLellan, A.C. Odian, I. Ostrovskiy, A. Larson, T. Tolba, P. C. Rowson, C. Jessiman, A. Pocar, C. Licciardi, J. Echevers, B. Mong, O. Ya. Zeldovich, A. Der Mesrobian-Kabakian, R. Neilson, T. Brunner, S. Delaquis, L. J. Kaufman, T. McElroy, David Moore, A. Karelin, A. S. Johnson, J. Watkins, V. Veeraraghavan, L. J. Wen, Marc Weber, Arun Kumar Soma, V.N. Stekhanov, S. X. Wu, D. R. Yahne, C. R. Hall, R. DeVoe, A. Piepke, J. Todd, Martin Breidenbach, David Leonard, S. J. Daugherty, O. Njoya, J. Farine, A. Dolgolenko, A. Craycraft, D. Beck, Thomas Koffas, Qing Xia, D. Tosi, W. M. Fairbank, A. Iverson, C. Chambers, J. Hoessl, P. S. Barbeau, J. Runge, W. R. Cen, R. Gornea, M. Coon, Y-R Yen, Shu Li, S. Schmidt, Guofu Cao, A. Robinson, F. Retiere, V. A. Belov, O. Nusair, R. Krücken, Jens Dilling, B. Veenstra, K. Murray, I. Badhrees, T. I. Totev, P. Gautam, T. Daniels, J. Davis, Gisela Anton, Z. Li, U. Wichoski, T. Ziegler, B. G. Lenardo, Peter Fierlinger, Gerrit Wrede, M. Tarka, B. T. Cleveland, A. Kuchenkov, Y. Lan, S. Feyzbakhsh, Yuehe Lin, and K. S. Kumar

Subjects
Physics, Scintillation, Range (particle radiation), Physics - Instrumentation and Detectors, Photon, Argon, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, Electron, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Xenon, chemistry, Electric field, Ionization, 0103 physical sciences, 010306 general physics
Abstract

Liquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. We use the EXO-200 experimental data to measure the absolute scintillation and ionization yields generated by $\gamma$ interactions from $^{228}$Th (2615~keV), $^{226}$Ra (1764~keV) and $^{60}$Co (1332~keV and 1173~keV) calibration sources, over a range of electric fields. The $W$-value that defines the recombination-independent energy scale is measured to be $11.5~\pm~0.5$~(syst.)~$\pm~0.1$~(stat.) eV. These data are also used to measure the recombination fluctuations in the number of electrons and photons produced by the calibration sources at the MeV-scale, which deviate from extrapolations of lower-energy data. Additionally, a semi-empirical model for the energy resolution of the detector is developed, which is used to constrain the recombination efficiency, i.e., the fraction of recombined electrons that result in the emission of a detectable photon. Detailed measurements of the absolute charge and light yields for MeV-scale electron recoils are important for predicting the performance of future neutrinoless double beta decay detectors.

Published
2019
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10. Deep Neural Networks for Energy and Position Reconstruction in EXO-200

Author

P. C. Rowson, Y.-R. Yen, A. Pocar, Douglas H Beck, J. C. Davis, W. Cree, T. Richards, Venkatesh Veeraraghavan, S. Delaquis, P. Hufschmidt, R. Krücken, M. Hughes, A. P. Waite, A. Karelin, Thomas Koffas, David Moore, W. M. Fairbank, Arun Kumar Soma, P. S. Barbeau, D. Fudenberg, A. Piepke, A. Craycraft, David A. Sinclair, M. J. Dolinski, Yuehe Lin, R. Bayerlein, Martin Breidenbach, G. S. Li, S. J. Daugherty, J. Dalmasson, V.N. Stekhanov, G. Wrede, K. S. Kumar, Stefan Schmidt, M. Tarka, A. Der Mesrobian-Kabakian, D. A. Harris, B. Mong, T. Daniels, C. R. Hall, Y. Lan, R. DeVoe, C. Chambers, J. Farine, Giorgio Gratta, Mikhail Danilov, U. Wichoski, A. S. Johnson, J. Todd, B. T. Cleveland, W. R. Cen, A. Kuchenkov, T. Ziegler, T. Tolba, A. Robinson, M. Wagenpfeil, R. MacLellan, M. Coon, J. L. Vuilleumier, E. V. Hansen, M. J. Jewell, J. Watkins, Liang Yang, D. S. Leonard, A. Jamil, S. Feyzbakhsh, Thilo Michel, Qing Xia, P. Fierlinger, C. Licciardi, Liangjian Wen, Guofu Cao, K. Murray, Gisela Anton, T. Brunner, L. J. Kaufman, O. Ya. Zeldovich, A. Dolgolenko, J. Hoessl, A. Schubert, Marc Weber, J. Daughhetee, F. Retière, J. B. Albert, V. A. Belov, R. Gornea, I. Ostrovskiy, O. Njoya, A. Iverson, Shu Li, Jens Dilling, I. Badhrees, A. Odian, and S. Kravitz

Subjects
Physics - Instrumentation and Detectors, Artificial neural network, 010308 nuclear & particles physics, Computer science, Calibration (statistics), Monte Carlo method, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Position (vector), 0103 physical sciences, Pattern recognition (psychology), Waveform, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation, Algorithm, Nuclear Experiment, Mathematical Physics, Energy (signal processing), Event reconstruction
Abstract

We apply deep neural networks (DNN) to data from the EXO-200 experiment. In the studied cases, the DNN is able to reconstruct the relevant parameters - total energy and position - directly from raw digitized waveforms, with minimal exceptions. For the first time, the developed algorithms are evaluated on real detector calibration data. The accuracy of reconstruction either reaches or exceeds what was achieved by the conventional approaches developed by EXO-200 over the course of the experiment. Most existing DNN approaches to event reconstruction and classification in particle physics are trained on Monte Carlo simulated events. Such algorithms are inherently limited by the accuracy of the simulation. We describe a unique approach that, in an experiment such as EXO-200, allows to successfully perform certain reconstruction and analysis tasks by training the network on waveforms from experimental data, either reducing or eliminating the reliance on the Monte Carlo., Accepted version. 33 pages, 28 figures

Published
2018

11. Search for nucleon decays with EXO-200

Author

M. Hughes, E. V. Hansen, A. P. Waite, Simon Johnston, T. Tolba, A.C. Odian, Liang Yang, A. Jamil, C. R. Hall, David Moore, O. Ya. Zeldovich, G. S. Li, T. Didberidze, B. T. Cleveland, L. J. Kaufman, Martin Breidenbach, R. MacLellan, M. Coon, S. J. Daugherty, R. DeVoe, R. H. Nelson, A. Pocar, U. Wichoski, Arun Kumar Soma, C. Chambers, P. C. Rowson, Petr Vogel, P. S. Barbeau, Guofu Cao, M. Danilov, M. J. Jewell, T. Ziegler, W. Cree, Yuehe Lin, David Leonard, V. A. Belov, Thomas Koffas, W. M. Fairbank, S. Delaquis, F. Retiere, K. S. Kumar, J. Zettlemoyer, S. Feyzbakhsh, V.N. Stekhanov, Douglas H Beck, J. C. Davis, Y-R Yen, A. Craycraft, B. Mong, D. Fudenberg, Samuel Homiller, J. Daughhetee, A. Piepke, K. Graham, M. J. Dolinski, C. Licciardi, A. Der Mesrobian-Kabakian, Peter Fierlinger, R. Bayerlein, Gerrit Wrede, A. Johnson, Thilo Michel, A. Karelin, Giorgio Gratta, M. Tarka, J. Farine, A. Dolgolenko, K. Murray, Y. Lan, J. Hoessl, P. Hufschmidt, M. Wagenpfeil, David A. Sinclair, Gisela Anton, A. Robinson, T. Walton, T. Brunner, Alexis G. Schubert, A. Kuchenkov, Justin Albert, R. Tsang, W. R. Cen, R. Gornea, L. J. Wen, Marc Weber, R. Krücken, Jens Dilling, I. Badhrees, T. Daniels, J.-L. Vuilleumier, S. Kravitz, I. Ostrovskiy, O. Njoya, Shu Li, and S. Schmidt

Subjects
Particle physics, Physics - Instrumentation and Detectors, Hadron, FOS: Physical sciences, Elementary particle, nucl-ex, 01 natural sciences, Atomic, High Energy Physics - Experiment, Nuclear physics, Particle decay, High Energy Physics - Experiment (hep-ex), Particle and Plasma Physics, 0103 physical sciences, Isotopes of xenon, Nuclear, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, physics.ins-det, Physics, Quantum Physics, Isotope, 010308 nuclear & particles physics, hep-ex, Molecular, Fermion, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, ddc, Baryon, Nucleon, Astronomical and Space Sciences
Abstract

A search for instability of nucleons bound in Xe136 nuclei is reported with 223 kg·yr exposure of Xe136 in the EXO-200 experiment. Lifetime limits of 3.3×1023 and 1.9×1023 yr are established for nucleon decay to Sb133 and Te133, respectively. These are the most stringent to date, exceeding the prior decay limits by a factor of 9 and 7, respectively.

Published
2018
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12. EFFECTS OF PHOTOHEMOTHERAPY ON THE CLINICAL COURSE OF BRONCHIAL ASTHMA

Author

E. I. Ostrovskiy, V. I. Karandashov, S. N. Shatokhina, N. P. Sanina, O. Yu. Ryzhkova, E. M. Katlomina, and N. R. Paleev

Subjects
medicine.medical_specialty, Myocarditis, Exacerbation, effectiveness, 01 natural sciences, 010309 optics, photohemotherapy, Internal medicine, Asthma control, 0103 physical sciences, Medicine, In patient, 010306 general physics, Asthma, clinical parameters, business.industry, Standard treatment, Therapeutic effect, Clinical course, General Medicine, medicine.disease, Physical therapy, bronchial asthma, business
Abstract

Background: Anti-inflammatory and immunoregulatory effects of photohemotherapy have been demonstrated in myocarditis, chronic obstructive pulmonary disease, some autoimmune and other disorders. There are only limited reports on the use of photohemotherapy in bronchial asthma (BA). Aim: To assess the influence of blue- and red-light photohemotherapy on clinical course of BA. Materials and methods: 480 hospitalized patients with persistent moderate BA and mild (44.5%) or moderate (55.5%) exacerbation were randomized to receive standard therapy of asthma exacerbation and photohemotherapy (treatment group, n=250) or standard therapy only (control group, n=230). Blue-light photohemotherapy (photodiode apparatus Solaris, n=220) or redlight photohemotherapy (helium-neon gas laser, n=30) was applied according to the schedule: procedure duration – 30 minutes, number of sessions – 5–7, every 2–3 days. Results: In asthma exacerbation, adding photohemotherapy to standard treatment was associated with more rapid improvement of clinical symptoms: maximal total asthma scores were achieved by the day 7–10 in patients with mild exacerbation and by the day 10–14 in patients with moderate exacerbation. Therapeutic effects of blue-light photohemotherapy were superior to those of red-light photohemotherapy. The data of 3-year follow-up supported the role of photohemotherapy in achieving asthma control: in the treatment group, proportion of patients with total control of asthma was 1.3-fold higher and one-year hospitalization number was lower by 34.8% compared with the controls. Conclusion: Blue-light and red-light photohemotherapy positively influences the clinical course of asthma and is associated with faster remission achievement and reduction of duration and frequency of hospitalizations.

Published
2016

13. An RF-only ion-funnel for extraction from high-pressure gases

Author

David Leonard, Thomas Koffas, W. M. Fairbank, T. Daniels, F. Retière, R. MacLellan, D. Fudenberg, J. Farine, P. S. Barbeau, I. Ostrovskiy, F. Leonard, R. Gornea, Marc Weber, D. Tosi, E. Smith, P. C. Rowson, Douglas H Beck, J. Walton, Y-R Yen, K. Graham, U. Wichoski, David A. Sinclair, J. L. Vuilleumier, M. Heffner, A. Craycraft, Monica Dunford, A. Piepke, M. Hughes, A. Sabourov, T. Tolba, A. Schubert, J. B. Albert, W. Feldmeier, L. J. Kaufman, David Moore, T. Didberidze, M. Tarka, B. Mong, D. J. Auty, C. Licciardi, V.N. Stekhanov, T. Brunner, Yuehe Lin, A. Karelin, Martin Breidenbach, S. J. Daugherty, C. Benitez-Medina, Ryan Killick, R. DeVoe, Lorenzo Fabris, C. Chambers, B. T. Cleveland, K. S. Kumar, A. Pocar, C. Ouellet, A. Kuchenkov, Giorgio Gratta, S. Kravitz, V. Varentsov, Liang Yang, Jens Dilling, M. Coon, T. N. Johnson, M. J. Jewell, A. Odian, K. Twelker, X. S. Jiang, R. Krücken, T. Walton, M. P. Rozo, M. J. Dolinski, Michael G. Marino, S. Johnston, P. Fierlinger, Liangjian Wen, and Guofu Cao

Subjects
Physics - Instrumentation and Detectors, Trace Amounts, Physics::Instrumentation and Detectors, FOS: Physical sciences, chemistry.chemical_element, 01 natural sciences, Ion, Xenon, Ionization, 0103 physical sciences, Nuclear Experiment (nucl-ex), Physical and Theoretical Chemistry, 010306 general physics, Nuclear Experiment, Instrumentation, Spectroscopy, Time projection chamber, Chemistry, 010401 analytical chemistry, Extraction (chemistry), Barium, Instrumentation and Detectors (physics.ins-det), Condensed Matter Physics, 0104 chemical sciences, 13. Climate action, Atomic physics, Bar (unit)
Abstract

An RF ion-funnel technique has been developed to extract ions from a high-pressure (10 bar) noble-gas environment into a vacuum (10(-6) mbar). Detailed simulations have been performed and a prototype has been developed for the purpose of extracting Ba-136 ions from Xe gas with high efficiency. With this prototype, ions have been extracted for the first time from high-pressure xenon gas and argon gas. Systematic studies have been carried out and compared to simulations. This demonstration of extraction of ions, with mass comparable to that of the gas generating the high-pressure, has applications to Ba tagging from a Xe-gas time-projection chamber for double-beta decay, as well as to the general problem of recovering trace amounts of an ionized element in a heavy (m > 40 u) carrier gas. (C) 2015 Elsevier B.V. All rights reserved.

Published
2015
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14. VUV-sensitive Silicon Photomultipliers for Xenon Scintillation Light Detection in nEXO

Author

A. Jamil, T. Ziegler, P. Hufschmidt, G. Li, L. Lupin-Jimenez, T. Michel, I. Ostrovskiy, F. Retiere, J. Schneider, M. Wagenpfeil, A. Alamre, J. B. Albert, G. Anton, I. J. Arnquist, I. Badhrees, P. S. Barbeau, D. Beck, V. Belov, T. Bhatta, F. Bourque, J. P. Brodsky, E. Brown, T. Brunner, A. Burenkov, G. F. Cao, L. Cao, W. R. Cen, C. Chambers, S. A. Charlebois, M. Chiu, B. Cleveland, M. Coon, M. Cote, A. Craycraft, W. Cree, J. Dalmasson, T. Daniels, L. Darroch, S. J. Daugherty, J. Daughhetee, S. Delaquis, A. Der Mesrobian-Kabakian, R. DeVoe, J. Dilling, Y. Y. Ding, M. J. Dolinski, A. Dragone, J. Echevers, L. Fabris, D. Fairbank, W. Fairbank, J. Farine, S. Feyzbakhsh, R. Fontaine, D. Fudenberg, G. Gallina, G. Giacomini, R. Gornea, G. Gratta, E. V. Hansen, D. Harris, M. Hasan, M. Heffner, J. HoBl, E. W. Hoppe, A. House, M. Hughes, Y. Ito, A. Iverson, C. Jessiman, M. J. Jewell, X. S. Jiang, A. Karelin, L. J. Kaufman, T. Koffas, S. Kravitz, R. Krucken, A. Kuchenkov, K. S. Kumar, Y. Lan, A. Larson, D. S. Leonard, S. Li, Z. Li, C. Licciardi, Y. H. Lin, P. Lv, R. MacLellan, B. Mong, D. C. Moore, K. Murray, R. J. Newby, Z. Ning, O. Njoya, F. Nolet, O. Nusair, K. Odgers, A. Odian, M. Oriunno, J. L. Orrell, G. S. Ortega, C. T. Overman, S. Parent, A. Piepke, A. Pocar, J.-F. Pratte, D. Qiu, V. Radeka, E. Raguzin, T. Rao, S. Rescia, A. Robinson, T. Rossignol, P. C. Rowson, N. Roy, R. Saldanha, S. Sangiorgio, S. Schmidt, A. Schubert, D. Sinclair, K. Skarpaas, A. K. Soma, G. St-Hilaire, V. Stekhanov, T. Stiegler, X. L. Sun, M. Tarka, J. Todd, T. Tolba, T. I. Totev, R. Tsang, T. Tsang, F. Vachon, B. Veenstra, V. Veeraraghavan, G. Visser, J.-L. Vuilleumier, Q. Wang, J. Watkins, M. Weber, W. Wei, L. J. Wen, U. Wichoski, G. Wrede, S. X. Wu, W. H. Wu, Q. Xia, L. Yang, Y.-R. Yen, O. Zeldovich, X. Zhang, J. Zhao, and Y. Zhou

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Scintillation, Time projection chamber, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Noble gas, chemistry.chemical_element, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Avalanche photodiode, 01 natural sciences, Optics, Silicon photomultiplier, Xenon, Nuclear Energy and Engineering, chemistry, Double beta decay, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, business
Abstract

Future tonne-scale liquefied noble gas detectors depend on efficient light detection in the VUV range. In the past years Silicon Photomultipliers (SiPMs) have emerged as a valid alternative to standard photomultiplier tubes or large area avalanche photodiodes. The next generation double beta decay experiment, nEXO, with a 5 tonne liquid xenon time projection chamber, will use SiPMs for detecting the $178\,\text{nm}$ xenon scintillation light, in order to achieve an energy resolution of $\sigma / Q_{\beta\beta} = 1\, \%$. This paper presents recent measurements of the VUV-HD generation SiPMs from Fondazione Bruno Kessler in two complementary setups. It includes measurements of the photon detection efficiency with gaseous xenon scintillation light in a vacuum setup and dark measurements in a dry nitrogen gas setup. We report improved photon detection efficiency at $175\,\text{nm}$ compared to previous generation devices, that would meet the criteria of nEXO. Furthermore, we present the projected nEXO detector light collection and energy resolution that could be achieved by using these SiPMs., Comment: 11 pages, 13 figures, 2 tables

Published
2018
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15. Searches for double beta decay of Xe134 with EXO-200

Author

L. J. Kaufman, Yuehe Lin, J. J. Russell, K. S. Kumar, T. Michel, Douglas H Beck, T. Daniels, Y-R Yen, J. Walton, M. Danilov, M. J. Jewell, I. Ostrovskiy, C. R. Hall, Y. Lan, David Leonard, A. S. Johnson, P. C. Rowson, J. Daughhetee, R. DeVoe, J. B. Albert, Petr Vogel, O. Ya. Zeldovich, A. Schubert, R. MacLellan, W. Cree, Thomas Koffas, W. M. Fairbank, J. Hoessl, O. Njoya, S. Delaquis, A.C. Odian, F. Retiere, P. Hufschmidt, Shu Li, R. Krücken, M. Hughes, Peter Fierlinger, S. Feyzbakhsh, J. Zettlemoyer, A. P. Waite, David A. Sinclair, A. Der Mesrobian-Kabakian, J. L. Vuilleumier, C. Licciardi, M. Tarka, P. S. Barbeau, A. Craycraft, K. Graham, Jens Dilling, I. Badhrees, C. Chambers, E. Smith, Martin Breidenbach, R. Bayerlein, A. Piepke, A. Karelin, Michael G. Marino, S. J. Daugherty, K. Murray, S. Johnston, David Moore, T. Didberidze, R. H. Nelson, B. T. Cleveland, Gisela Anton, T. Walton, A. Kuchenkov, J. Davis, M. Wagenpfeil, Guofu Cao, U. Wichoski, A. Dolgolenko, B. Mong, Giorgio Gratta, T. Ziegler, T. Tolba, L. J. Wen, Marc Weber, D. Fudenberg, M. J. Dolinski, S. Kravitz, Liang Yang, A. Jamil, R. Tsang, W. R. Cen, R. Gornea, M. Coon, A. Pocar, J. Farine, V. Belov, V.N. Stekhanov, and T. Brunner

Subjects
Physics, Particle physics, Isotope, 010308 nuclear & particles physics, chemistry.chemical_element, 01 natural sciences, Beta decay, Particle detector, 3. Good health, Nuclear physics, Xenon, chemistry, Double beta decay, 0103 physical sciences, Isotopes of xenon, Nuclear astrophysics, 010306 general physics, Radioactive decay
Abstract

Searches for double beta decay of ^(134)Xe were performed with EXO-200, a single-phase liquid xenon detector designed to search for neutrinoless double beta decay of ^(136)Xe. Using an exposure of 29.6 kg⋅yr, the lower limits of T^(2νββ_+(1/2) > 8.7×10^(20) yr and T^(0νββ)_(1/2) > 1.1×10^(23) yr at 90% confidence level were derived, with corresponding half-life sensitivities of 1.2×10^(21) yr and 1.9×10^(23) yr. These limits exceed those in the literature for ^(134)Xe, improving by factors of nearly 105 and 2 for the two antineutrino and neutrinoless modes, respectively.

Published
2017
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16. Sensitivity and discovery potential of the proposed nEXO experiment to neutrinoless double beta decay

Author

J. L. Vuilleumier, B. Mong, M. Wagenpfeil, J. Dalmasson, A. Piepke, J. Todd, Y. Y. Ding, M. Heffner, Yuehe Lin, John L. Orrell, E. Raguzin, X.L. Sun, J. B. Zhao, C. T. Overman, R. Krücken, D. Qiu, Z. Li, Giorgio Gratta, A. Burenkov, M. Hasan, Arun Kumar Soma, L. J. Kaufman, R. DeVoe, S. J. Daugherty, Samuele Sangiorgio, M. Hughes, K. S. Kumar, V. Veeraraghavan, Y. Lan, Wei Wei, Petr Vogel, Rejean Fontaine, J. Daughhetee, A. Craycraft, U. Wichoski, Ethan Brown, F. Bourque, M. J. Jewell, M. Coon, D. Harris, Yu-Guang Zhou, T. Ziegler, T. Tolba, G. St-Hilaire, T. Tsang, Qun-Yao Wang, T. Stiegler, M. Chiu, J. P. Brodsky, David Moore, F. Retiere, Y. Ito, J. Zettlemoyer, Douglas H Beck, M. Oriunno, Zhijun Ning, S. Johnston, O. Zeldovich, G. Visser, A. Karelin, J. Hößl, A. Pocar, R. Tsang, T. Didberidze, S. Kravitz, Guofu Cao, T. N. Johnson, J. Schneider, P. Hufschmidt, E. V. Hansen, Y-R Yen, David A. Sinclair, F. Vachon, Ryan Killick, David Leonard, K. Murray, Liang Yang, R. J. Newby, Thomas Koffas, A. Jamil, D. Fudenberg, W. M. Fairbank, Gisela Anton, M. Côté, P. C. Rowson, T. Daniels, K. Graham, G. S. Ortega, B. T. Cleveland, M. J. Dolinski, V.N. Stekhanov, K. Odgers, Angelo Dragone, A. House, S. Rescia, A. Kuchenkov, W. Cree, Jean-Francois Pratte, Veljko Radeka, T. Rossignol, S. Feyzbakhsh, R. Saldanha, S. Delaquis, T. Brunner, W. R. Cen, Serge A. Charlebois, C. Licciardi, G. S. Li, R. Gornea, K. Skarpaas, G. Wrede, I. J. Arnquist, M. Tarka, Wei Wu, X. S. Jiang, A. Der Mesrobian-Kabakian, C. Chambers, A.C. Odian, G. Giacomini, A. Schubert, S. Parent, J. Farine, V. Belov, A. Robinson, L. Cao, F. Nolet, L. J. Wen, Marc Weber, S. X. Wu, Lorenzo Fabris, J. B. Albert, R. MacLellan, Thilo Michel, P. S. Barbeau, Jens Dilling, Xuan Zhang, I. Badhrees, I. Ostrovskiy, O. Njoya, A. Iverson, Shu Li, S. Schmidt, T. Rao, N. Roy, and E. W. Hoppe

Subjects
Physics, Time projection chamber, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Active medium, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), 01 natural sciences, 7. Clean energy, 3. Good health, Nuclear physics, Homogeneous, 0103 physical sciences, Sensitivity (control systems), Nuclear Experiment (nucl-ex), 010306 general physics, Enriched Xenon Observatory, Nuclear Experiment, Order of magnitude
Abstract

The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double beta ($0\nu\beta\beta$) decay in $^{136}$Xe with a target half-life sensitivity of approximately $10^{28}$ years using $5\times10^3$ kg of isotopically enriched liquid-xenon in a time projection chamber. This improvement of two orders of magnitude in sensitivity over current limits is obtained by a significant increase of the $^{136}$Xe mass, the monolithic and homogeneous configuration of the active medium, and the multi-parameter measurements of the interactions enabled by the time projection chamber. The detector concept and anticipated performance are presented based upon demonstrated realizable background rates., Comment: v2 as published

Published
2017

17. 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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18. Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector

Author

M. Wagenpfeil, S. Feyzbakhsh, S. Johnston, Martin Breidenbach, M. Coon, P. Fierlinger, Liangjian Wen, S. J. Daugherty, Guofu Cao, K. Graham, C. Licciardi, S. Kravitz, O. Ya. Zeldovich, R. Bayerlein, A. Piepke, R. H. Nelson, A. Schubert, U. Wichoski, Marc Weber, B. T. Cleveland, E. V. Hansen, B. Mong, P. C. Rowson, Giorgio Gratta, A. Kuchenkov, T. Ziegler, P. S. Barbeau, W. Cree, J. Davis, R. Krücken, S. Delaquis, K. Murray, David Leonard, R. Tsang, M. J. Jewell, A. Karelin, V. A. Belov, Gisela Anton, Liang Yang, A. Jamil, J. J. Russell, J. Farine, J. B. Albert, T. Walton, Thomas Koffas, W. M. Fairbank, M. Danilov, W. R. Cen, R. Gornea, J. Hoessl, Y. Lan, P. Hufschmidt, R. DeVoe, L. J. Kaufman, Douglas H Beck, J. Zettlemoyer, David A. Sinclair, Y-R Yen, J. Daughhetee, Yuehe Lin, C. Chambers, J. L. Vuilleumier, C. R. Hall, R. MacLellan, K. S. Kumar, A. Craycraft, T. Tolba, Thilo Michel, T. Brunner, A. S. Johnson, A. Dolgolenko, V.N. Stekhanov, A. Pocar, D. Fudenberg, M. Hughes, A. P. Waite, David Moore, T. Didberidze, Petr Vogel, F. Retiere, G. S. Li, M. J. Dolinski, A. Der Mesrobian-Kabakian, I. Ostrovskiy, O. Njoya, Shu Li, S. Schmidt, Jens Dilling, I. Badhrees, A. Odian, Gerrit Wrede, M. Tarka, and T. Daniels

Subjects
Cryostat, Physics, Particle physics, 010308 nuclear & particles physics, Detector, General Physics and Astronomy, chemistry.chemical_element, FOS: Physical sciences, Radon, 01 natural sciences, Confidence interval, High Energy Physics - Experiment, ddc, Nuclear physics, Lead shielding, High Energy Physics - Experiment (hep-ex), Upgrade, chemistry, Double beta decay, 0103 physical sciences, Nuclear astrophysics, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

Results from a search for neutrinoless double-beta decay $0\nu\beta\beta$ of $^{136}$Xe are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detector has been improved to $\sigma/E$=1.23%, the electric field in the drift region has been raised by 50%, and a system to suppress radon in the volume between the cryostat and lead shielding has been implemented. In addition, analysis techniques that improve topological discrimination between $0\nu\beta\beta$ and background events have been developed. Incorporating these hardware and analysis improvements, the median 90% confidence level $0\nu\beta\beta$ half-life sensitivity after combining with the full data set acquired before the upgrade has increased 2-fold to $3.7 \times 10^{25}$ yr. No statistically significant evidence for $0\nu\beta\beta$ is observed, leading to a lower limit on the $0\nu\beta\beta$ half-life of $1.8\times10^{25}$ yr at the 90% confidence level., Comment: 6 pages, 4 figures, final version submitted to PRL

Published
2017
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19. Characterization of an Ionization Readout Tile for nEXO

Author

T. Stiegler, Douglas H Beck, R. Tsang, K. Murray, Gisela Anton, D. Fudenberg, R. Saldanha, Angelo Dragone, J. Todd, Y. Y. Ding, R. Krücken, Jochen M. Schneider, Y-R Yen, Jean-Francois Pratte, P. C. Rowson, K. Skarpaas, S. Kravitz, E. V. Hansen, Liang Yang, S. Feyzbakhsh, A. House, V. Veeraraghavan, R. J. Newby, A. Jamil, Ethan Brown, M. Chiu, W. Cree, A. Burenkov, S. Delaquis, M. Hughes, M. Côté, T. Daniels, Gabriele Giacomini, A. Pocar, Maulik R. Patel, M. Hasan, J. Farine, A. Karelin, R. DeVoe, Jens Dilling, Arun Kumar Soma, Zhijun Ning, T. Tolba, M. J. Jewell, I. Badhrees, David Moore, A. Robinson, T. Didberidze, B. Mong, M. Wagenpfeil, J. Dalmasson, I. J. Arnquist, Xiaoshan Jiang, Yuehe Lin, Veljko Radeka, A. Piepke, Gerrit Wrede, V.N. Stekhanov, J. B. Zhao, S. Parent, U. Wichoski, M. Oriunno, W. R. Cen, C. Chambers, R. Gornea, M. Heffner, A. Odian, D. Qiu, M. Tarka, S. Johnston, T. Ziegler, I. Ostrovskiy, John L. Orrell, E. Raguzin, Z. Li, T. Brunner, S. Rescia, S. X. Wu, Eric W. Hoppe, M. Coon, S. J. Daugherty, A. Schubert, O. Zeldovich, Cory T. Overman, G. Visser, Wei Wu, O. Njoya, A. Iverson, Triveni Rao, Y. Lan, Thomas Tsang, Shu Li, S. Schmidt, J. Daughhetee, Qian Wang, David Leonard, G. S. Ortega, Thomas Koffas, W. M. Fairbank, Samuele Sangiorgio, Giorgio Gratta, J. L. Vuilleumier, B. T. Cleveland, K. Odgers, Serge A. Charlebois, R. MacLellan, Yumei Zhou, Wei Wei, K. S. Kumar, Rejean Fontaine, A. Kuchenkov, P. Hufschmidt, David A. Sinclair, F. Bourque, J. P. Brodsky, G. St-Hilaire, D. Harris, Y. Ito, L. J. Kaufman, M. J. Dolinski, A. Craycraft, Liangjian Wen, Guofu Cao, G. S. Li, Thilo Michel, T. Rossignol, Xiaoyang Sun, C. Licciardi, A. Der Mesrobian-Kabakian, N. Roy, L. Cao, F. Nolet, F. Vachon, Marc Weber, F. Retière, J. B. Albert, X. Zhang, J. Hößl, P. S. Barbeau, V. A. Belov, and Lorenzo Fabris

Subjects
Physics - Instrumentation and Detectors, Materials science, Physics::Instrumentation and Detectors, chemistry.chemical_element, FOS: Physical sciences, STRIPS, 01 natural sciences, law.invention, Optics, Xenon, law, Ionization, 0103 physical sciences, Wafer, 010306 general physics, Instrumentation, Mathematical Physics, Time projection chamber, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Anode, chemistry, visual_art, visual_art.visual_art_medium, Tile, business
Abstract

A new design for the anode of a time projection chamber, consisting of a charge-detecting "tile", is investigated for use in large scale liquid xenon detectors. The tile is produced by depositing 60 orthogonal metal charge-collecting strips, 3~mm wide, on a 10~\si{\cm} $\times$ 10~\si{\cm} fused-silica wafer. These charge tiles may be employed by large detectors, such as the proposed tonne-scale nEXO experiment to search for neutrinoless double-beta decay. Modular by design, an array of tiles can cover a sizable area. The width of each strip is small compared to the size of the tile, so a Frisch grid is not required. A grid-less, tiled anode design is beneficial for an experiment such as nEXO, where a wire tensioning support structure and Frisch grid might contribute radioactive backgrounds and would have to be designed to accommodate cycling to cryogenic temperatures. The segmented anode also reduces some degeneracies in signal reconstruction that arise in large-area crossed-wire time projection chambers. A prototype tile was tested in a cell containing liquid xenon. Very good agreement is achieved between the measured ionization spectrum of a $^{207}$Bi source and simulations that include the microphysics of recombination in xenon and a detailed modeling of the electrostatic field of the detector. An energy resolution $\sigma/E$=5.5\% is observed at 570~\si{keV}, comparable to the best intrinsic ionization-only resolution reported in literature for liquid xenon at 936~V/\si{cm}., Comment: 18 pages, 13 figures, as published

Published
2017
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20. Search for2νββdecay ofXe136to the01+excited state ofBa136with the EXO-200 liquid xenon detector

Author

A.C. Odian, I. Ostrovskiy, David Leonard, Thomas Koffas, W. M. Fairbank, O. Ya. Zeldovich, S. Feyzbakhsh, E. Smith, R. Krücken, D. Beck, M. Coon, D. Fudenberg, T. Brunner, J. King, O. Njoya, R. DeVoe, Peter Fierlinger, Justin Albert, K. Graham, Monica Dunford, A. Pocar, R. H. Nelson, U. Wichoski, M. Weber, T. Walton, Petr Vogel, M. Tarka, C. Licciardi, C. R. Hall, T. Tolba, C. Chambers, Q. Y. Xu, Ryan Killick, R. Tsang, M. Danilov, J. Walton, P. C. Rowson, D. J. Auty, A. Kuchenkov, Jens Dilling, J. Chaves, W. Feldmeier, F. Retiere, B. Mong, C.Y. Prescott, A. Craycraft, Martin Breidenbach, S. J. Daugherty, R. Gornea, L. J. Kaufman, T. Daniels, M. Hughes, J. Farine, S. Delaquis, A. P. Waite, Simon Johnston, J. C. Davis, Y-R Yen, Guofu Cao, T. N. Johnson, Yuehe Lin, Giorgio Gratta, J. L. Wood, David Moore, J. J. Russell, T. Didberidze, A. Der Mesrobian-Kabakian, J.-L. Vuilleumier, K. S. Kumar, B. T. Cleveland, Liang Yang, M. J. Dolinski, S. Kravitz, A. Piepke, A. Burenkov, A. Karelin, A. Johnson, V.N. Stekhanov, David A. Sinclair, T. A. Winick, M. J. Jewell, K. Twelker, L. J. Wen, Alexis G. Schubert, R. MacLellan, M. G. Marino, P. S. Barbeau, V. A. Belov, and A. Dolgolenko

Subjects
Semileptonic decay, Physics, 010308 nuclear & particles physics, Detector, chemistry.chemical_element, 7. Clean energy, 01 natural sciences, Lower limit, Xenon, chemistry, Excited state, 0103 physical sciences, Single phase, Atomic physics, Neutrino, 010306 general physics, Ground state
Abstract

EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless ββ decay of ^(136)Xe to the ground state of ^(136)Ba. We report here on a search for the two-neutrino ββ decay of 136Xe to the first 0+ excited state, 0^+_1, of ^(136)Ba based on a 100 kg yr exposure of ^(136)Xe. Using a specialized analysis employing a machine learning algorithm, we obtain a 90% CL half-life sensitivity of 1.7 × 10^(24) yr. We find no statistically significant evidence for the 2νββ decay to the excited state resulting in a lower limit of T^(2ν)_(1/2)(0^+ → 0^+_1) > 6.9 ×10^(23) yr at 90% CL. This observed limit is consistent with the estimated half-life of 2.5 × 10^(25) yr.

Published
2016
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21. An Optimal Energy Estimator to Reduce Correlated Noise for the EXO-200 Light Readout

Author

A. Der Mesrobian-Kabakian, Yuehe Lin, A. Pocar, S. Kravitz, Monica Dunford, C. Y. Prescott, M. Coon, R. Tsang, A. Craycraft, J. L. Wood, V.N. Stekhanov, Liang Yang, K. S. Kumar, W. R. Cen, R. Gornea, K. Graham, J. J. Russell, J. Farine, M. Danilov, Peter Fierlinger, A. Karelin, A. Dolgolenko, R. DeVoe, Douglas H Beck, David Leonard, V. Belov, M. Tarka, Thomas Koffas, W. M. Fairbank, Y-R Yen, Michael G. Marino, T. Daniels, S. Johnston, T. Brunner, C. G. Davis, O. Ya. Zeldovich, T. Walton, Liangjian Wen, A. S. Johnson, Guofu Cao, Martin Breidenbach, S. J. Daugherty, L. J. Kaufman, A. Burenkov, B. Mong, E. Smith, R. Krücken, F. Retière, J. B. Albert, David A. Sinclair, A. Schubert, Ryan Killick, R. H. Nelson, M. J. Dolinski, U. Wichoski, B. T. Cleveland, P. S. Barbeau, T. Tolba, A. Kuchenkov, S. Feyzbakhsh, Marc Weber, C. Licciardi, C. R. Hall, J. L. Vuilleumier, J. Walton, A. Piepke, Giorgio Gratta, W. Feldmeier, J. Davis, M. Hughes, A. P. Waite, M. J. Jewell, K. Twelker, David Moore, T. Didberidze, T. N. Johnson, D. Fudenberg, R. MacLellan, C. Chambers, P. C. Rowson, S. Delaquis, Jens Dilling, A. Odian, I. Ostrovskiy, and O. Njoya

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, 01 natural sciences, Noise (electronics), Particle detector, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Optics, Double beta decay, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation, Nuclear Experiment, Mathematical Physics, Physics, Scintillation, 010308 nuclear & particles physics, business.industry, Detector, Estimator, Instrumentation and Detectors (physics.ins-det), High Energy Physics::Experiment, business, Energy (signal processing), Radioactive decay
Abstract

The energy resolution of the EXO-200 detector is limited by electronics noise in the measurement of the scintillation response. Here we present a new technique to extract optimal scintillation energy measurements for signals split across multiple channels in the presence of correlated noise. The implementation of these techniques improves the energy resolution of the detector at the neutrinoless double beta decay Q-value from $\left[1.9641\pm 0.0039\right]\%$ to $\left[1.5820\pm 0.0044\right]\%$., Comment: 21 pages, 8 figures, 1 table

Published
2016
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22. Measurements of the ion fraction and mobility ofα−andβ-decay products in liquid xenon using the EXO-200 detector

Author

A. Craycraft, James G. Davis, I. Ostrovskiy, M. J. Dolinski, A. Karelin, C. G. Davis, Martin Breidenbach, S. J. Daugherty, David A. Sinclair, T. Walton, R. MacLellan, Liang Yang, M. J. Jewell, K. Twelker, B. Mong, A. Schubert, K. Graham, Giorgio Gratta, David Leonard, R. DeVoe, M. Weber, M. G. Marino, V.N. Stekhanov, Douglas H Beck, M. Danilov, P. Fierlinger, Thomas Koffas, W. M. Fairbank, R. Nelson, Y-R Yen, K. O'Sullivan, Guofu Cao, S. Johnston, X. S. Jiang, J. Wood, D. J. Auty, A. Der Mesrobian-Kabakian, Ryan Killick, L. J. Kaufman, R. Tsang, E. Smith, A. Burenkov, M. Coon, B. T. Cleveland, R. Gornea, Yuehe Lin, C. Chambers, A. Kuchenkov, T. Tolba, W. Feldmeier, A. Piepke, P. C. Rowson, L. J. Wen, A. Pocar, J. J. Russell, J.-L. Vuilleumier, K. S. Kumar, S. Delaquis, S. Kravitz, C. Licciardi, O. Ya. Zeldovich, A. Dolgolenko, M. Tarka, J. Farine, V. Belov, A. Robinson, T. Brunner, Justin Albert, Monica Dunford, U. Wichoski, J. D. Wright, T. N. Johnson, A.C. Odian, A. S. Johnson, P. S. Barbeau, C.Y. Prescott, T. Daniels, C. R. Hall, J. Walton, D. Fudenberg, M. Hughes, A. P. Waite, David Moore, and T. Didberidze

Subjects
Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, 01 natural sciences, Charged particle, Ion, Ionization, Double beta decay, 0103 physical sciences, Alpha decay, Atomic physics, 010306 general physics, Crystal Ball
Abstract

Alpha decays in the EXO-200 detector are used to measure the fraction of charged $^{218}\text{Po}$ and $^{214}\text{Bi}$ daughters created from $\ensuremath{\alpha}$ and $\ensuremath{\beta}$ decays, respectively. $^{222}\text{Rn} \ensuremath{\alpha}$ decays in liquid xenon (LXe) are found to produce $^{218}\text{Po}^{+}$ ions $50.3\ifmmode\pm\else\textpm\fi{}3.0%$ of the time, while the remainder of the $^{218}\text{Po}$ atoms are neutral. The fraction of $^{214}\text{Bi}^{+}$ from $^{214}\text{Pb} \ensuremath{\beta}$ decays in LXe is found to be $76.4\ifmmode\pm\else\textpm\fi{}5.7%$, inferred from the relative rates of $^{218}\text{Po}$ and $^{214}\text{Po} \ensuremath{\alpha}$ decays in the LXe. The average velocity of $^{218}\text{Po}$ ions is observed to decrease for longer drift times. Initially the ions have a mobility of $0.390\ifmmode\pm\else\textpm\fi{}0.006\phantom{\rule{4pt}{0ex}}{\text{cm}}^{2}/(\text{kV}\text{s})$, and at long drift times the mobility is $0.219\ifmmode\pm\else\textpm\fi{}0.004\phantom{\rule{4pt}{0ex}}{\text{cm}}^{2}/(\text{kV}\text{s})$. Time constants associated with the change in mobility during drift of the $^{218}\text{Po}^{+}$ ions are found to be proportional to the electron lifetime in the LXe.

Published
2015
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23. Investigation of radioactivity-induced backgrounds in EXO-200

Author

T. Daniels, C. Y. Prescott, A. S. Johnson, Douglas H Beck, T. N. Johnson, M. J. Jewell, A. Dolgolenko, D. Fudenberg, Y-R Yen, K. Twelker, J. B. Albert, P. C. Rowson, A. Pocar, M. Hughes, A. Piepke, A. P. Waite, I. Ostrovskiy, J. Farine, R. MacLellan, B. Mong, R. Nelson, U. Wichoski, S. Delaquis, V. Belov, S. Herrin, A Rivas, M. Danilov, A. Craycraft, C. R. Hall, David Moore, A. Schubert, T. Didberidze, A.C. Odian, C. G. Davis, Yuehe Lin, C. Benitez-Medina, Giorgio Gratta, J. Wood, Martin Breidenbach, D. J. Auty, T. Tolba, S. J. Daugherty, J. L. Vuilleumier, P. S. Barbeau, T. Walton, G. Giroux, J. Walton, V.N. Stekhanov, T. Brunner, J. J. Russell, R. Gornea, K. S. Kumar, W. Feldmeier, Marc Weber, David A. Sinclair, Ryan Killick, David Leonard, Thomas Koffas, B. T. Cleveland, W. M. Fairbank, Monica Dunford, A. Kuchenkov, C. Chambers, K. Graham, M. Coon, O. Ya. Zeldovich, A. Karelin, J. Davis, M. Tarka, C. Licciardi, L. J. Kaufman, R. DeVoe, X. S. Jiang, A. Der Mesrobian-Kabakian, E. Smith, S. Kravitz, Liang Yang, M. J. Dolinski, Michael G. Marino, S. Johnston, P. Fierlinger, Liangjian Wen, Guofu Cao, A. Burenkov, and R. Tsang

Subjects
Physics, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Parameter space, 01 natural sciences, Beta decay, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Double beta decay, 0103 physical sciences, Beta (velocity), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract

The search for neutrinoless double-beta decay (0{\nu}{\beta}{\beta}) requires extremely low background and a good understanding of their sources and their influence on the rate in the region of parameter space relevant to the 0{\nu}{\beta}{\beta} signal. We report on studies of various {\beta}- and {\gamma}-backgrounds in the liquid- xenon-based EXO-200 0{\nu}{\beta}{\beta} experiment. With this work we try to better understand the location and strength of specific background sources and compare the conclusions to radioassay results taken before and during detector construction. Finally, we discuss the implications of these studies for EXO-200 as well as for the next-generation, tonne-scale nEXO detector., Comment: 9 pages, 7 figures, 3 tables

Published
2015

24. Search for Majoron-emitting modes of double-beta decay ofXe136with EXO-200

Author

J. L. Vuilleumier, David A. Sinclair, W. Feldmeier, R. Gornea, M. Danilov, L. J. Kaufman, I. Ostrovskiy, J. Farine, D. J. Auty, Peter Fierlinger, X. S. Jiang, D. Tosi, V. Belov, V.N. Stekhanov, T. N. Johnson, C. G. Davis, Martin Breidenbach, R. Nelson, M. Tarka, Michael G. Marino, Douglas H Beck, S. Johnston, S. J. Daugherty, A.C. Odian, Y-R Yen, B. Mong, J. Davis, Liangjian Wen, Guofu Cao, Giorgio Gratta, T. Daniels, C. Benitez-Medina, M. Coon, C. Chambers, Ryan Killick, Monica Dunford, A. Dolgolenko, David Leonard, B. T. Cleveland, M. J. Jewell, Thomas Koffas, W. M. Fairbank, P. C. Rowson, A. Kuchenkov, K. Twelker, E. Beauchamp, G. Giroux, Yuehe Lin, R. DeVoe, R. Tsang, T. Walton, Petr Vogel, J. J. Russell, J. Chaves, S. Delaquis, A Rivas, K. S. Kumar, Marc Weber, A. Karelin, A. Schubert, U. Wichoski, C. Y. Prescott, S. Herrin, C. R. Hall, R. MacLellan, A. S. Johnson, J. B. Albert, F. Leonard, A. Burenkov, T. Brunner, E. Smith, O. Ya. Zeldovich, S. Kravitz, M. P. Rozo, A. Piepke, K. Graham, Liang Yang, A. Pocar, C. Ouellet, M. J. Dolinski, A. Craycraft, C. Licciardi, P. S. Barbeau, J. Walton, D. Fudenberg, M. Hughes, A. P. Waite, David Moore, T. Didberidze, and T. Tolba

Subjects
Coupling constant, Physics, Nuclear and High Energy Physics, Spectral index, 010308 nuclear & particles physics, chemistry.chemical_element, 01 natural sciences, Beta decay, Lower limit, Xenon, chemistry, Double beta decay, 0103 physical sciences, Single phase, Atomic physics, 010306 general physics, Majoron
Abstract

EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of ^(136)Xe. Here, we report on a search for various Majoron-emitting modes based on 100 kg yr exposure of ^(136)Xe. A lower limit of T^(136)Xe_(1/2) > 1.2 × 10^(24) yr at 90% C.L. on the half-life of the spectral index=1 Majoron decay was obtained, corresponding to a constraint on the Majoron-neutrino coupling constant of |⟨g^(M)_(ee)⟩| < (0.8–1.7) × 10^(−5).

Published
2014
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25. Improved measurement of the2νββhalf-life of136Xe with the EXO-200 detector

Author

J. L. Vuilleumier, K. Hall, Peter Fierlinger, R. DeVoe, M. Tarka, S. Kravitz, S. Herrin, C. R. Hall, S. Johnston, R. MacLellan, W. Feldmeier, Petr Vogel, Y. B. Zhao, M. Hughes, A. P. Waite, Y.-R. Yen, S. Cook, V. Strickland, J. Wodin, M. J. Dolinski, G. Giroux, David Moore, K. Graham, M. Danilov, A Rivas, A. Piepke, O. Ya. Zeldovich, D. Tosi, J. Chaves, Liang Yang, Martin Auger, D. Fudenberg, D. J. Auty, D. Franco, J. Bonatt, David A. Sinclair, R. H. Nelson, M. P. Rozo, U. Wichoski, C. G. Davis, A. Dobi, V.N. Stekhanov, Ryan Killick, Marc Weber, C. K. Hargrove, K. O'Sullivan, Michael G. Marino, Martin Breidenbach, T. Daniels, S. J. Daugherty, B. Mong, J. J. Russell, C. Benitez-Medina, B. T. Cleveland, J. D. Wright, T. Tolba, J. Walton, A.C. Odian, K. S. Kumar, A. Kuchenkov, A. Dolgolenko, A. Pocar, M. Montero Díez, F. Leonard, C. Ouellet, J. Davis, Guofu Cao, C. Y. Prescott, A. Burenkov, A. Craycraft, P. S. Barbeau, Giorgio Gratta, L. J. Wen, D. Beck, I. Ostrovskiy, V. A. Belov, X. S. Jiang, T. Brunner, David Leonard, S. Slutsky, A. S. Johnson, W. M. Fairbank, A. Karelin, Monica Dunford, A. Sabourov, T. N. Johnson, K. Twelker, E. Beauchamp, L. J. Kaufman, J. B. Albert, T. Walton, J. Farine, C. Licciardi, R. Gornea, C. Chambers, P. C. Rowson, S. Delaquis, and K. Skarpaas

Subjects
Systematic error, Physics, Nuclear and High Energy Physics, Time projection chamber, 010308 nuclear & particles physics, Detector, Half-life, 01 natural sciences, Beta decay, Nuclear physics, Nuclear magnetic resonance, Homogeneous, Double beta decay, 0103 physical sciences, 010306 general physics, Fiducial marker
Abstract

We report on an improved measurement of the 2νββ half-life of ^(136)Xe performed by EXO-200. The use of a large and homogeneous time-projection chamber allows for the precise estimate of the fiducial mass used for the measurement, resulting in a small systematic uncertainty. We also discuss in detail the data-analysis methods used for double-β decay searches with EXO-200, while emphasizing those directly related to the present measurement. The ^(136)Xe 2νββ half-life is found to be T^(2νββ)_(1/2) = 2.165±0.016(stat)±0.059(sys)×10^(21) yr. This is the most precisely measured half-life of any 2νββ decay to date.

Published
2014
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26. Errata: 'Search for neutrinoless double beta decay'

Author

I. Ostrovskiy and K. O’Sullivan

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Double beta decay, 0103 physical sciences, General Physics and Astronomy, Astronomy and Astrophysics, 010306 general physics, 01 natural sciences
Published
2016
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27. Cosmogenic backgrounds to 0νββ in EXO-200

Author

A. Der Mesrobian-Kabakian, Ryan Killick, B. T. Cleveland, J. Walton, A. Kuchenkov, Douglas H Beck, Y-R Yen, T. Daniels, David A. Sinclair, Peter Fierlinger, E. Smith, M. Tarka, Yuehe Lin, T. Tolba, T. Walton, R. Tsang, J. Davis, A. Craycraft, C. Chambers, M. Danilov, Jens Dilling, D. Fudenberg, M. J. Jewell, J. L. Wood, R. Gornea, K. Twelker, Michael G. Marino, D. J. Auty, A. Pocar, S. Johnston, A. Dolgolenko, David Leonard, A. Odian, K. S. Kumar, R. Krücken, Guofu Cao, R. DeVoe, R. MacLellan, M. Hughes, Thomas Koffas, W. M. Fairbank, I. Ostrovskiy, A. P. Waite, S. Herrin, Monica Dunford, J. L. Vuilleumier, O. Njoya, P. C. Rowson, O. Ya. Zeldovich, T. Brunner, Giorgio Gratta, K. Graham, L. J. Wen, Marc Weber, Martin Breidenbach, David Moore, B. Mong, W. Feldmeier, T. Didberidze, V.N. Stekhanov, R. H. Nelson, U. Wichoski, S. J. Daugherty, S. Delaquis, A. S. Johnson, S. Feyzbakhsh, M. J. Dolinski, L. J. Kaufman, C. Licciardi, J. J. Russell, C. Y. Prescott, M. Coon, C. R. Hall, J. B. Albert, A. Burenkov, T. N. Johnson, A. Schubert, J. Farine, V. Belov, S. Kravitz, Liang Yang, A. Piepke, A. Karelin, F. Retière, and P. S. Barbeau

Subjects
Physics, Radionuclide, Time projection chamber, 010308 nuclear & particles physics, Cosmic background radiation, chemistry.chemical_element, Astronomy and Astrophysics, 7. Clean energy, 01 natural sciences, Particle identification, Nuclear physics, Neutron capture, Xenon, chemistry, 13. Climate action, Double beta decay, 0103 physical sciences, Neutron, 010306 general physics
Abstract

As neutrinoless double-beta decay experiments become more sensitive and intrinsic radioactivity in detector materials is reduced, previously minor contributions to the background must be understood and eliminated. With this in mind, cosmogenic backgrounds have been studied with the EXO-200 experiment. Using the EXO-200 TPC, the muon flux (through a flat horizontal surface) underground at the Waste Isolation Pilot Plant (WIPP) has been measured to be Φ = 4.07 ± 0.14 (sys) ± 0.03 (stat) × 10−7cm−2 s−1, with a vertical intensity of Iv = 2.97 −0.13 (sys) ± 0.02 (stat) × 10−7cm−2 s−1 sr−1. Simulations of muon-induced backgrounds identified several potential cosmogenic radionuclides, though only 137Xe is a significant background for the 136Xe 0νββ search with EXO-200. Muon-induced neutron backgrounds were measured using γ-rays from neutron capture on the detector materials. This provided a measurement of 137Xe yield, and a test of the accuracy of the neutron production and transport simulations. The independently measured rates of 136Xe neutron capture and of 137Xe decay agree within uncertainties. Geant4 and FLUKA simulations were performed to estimate neutron capture rates, and these estimates agreed to within ∼40% or better with measurements. The ability to identify 136Xe(n, γ) events will allow for rejection of 137Xe backgrounds in future 0νββ analyses.

Published
2016
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28. 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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29. 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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30. 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

31. Search for Neutrinoless Double-Beta Decay inXe136with EXO-200

Author

M. Hughes, A. P. Waite, A. R. Müller, D. Tosi, R. Gornea, T. Brunner, Monica Dunford, P. C. Rowson, A. Sabourov, C. Benitez-Medina, E. Beauchamp, A. Pocar, C. Ouellet, S. Delaquis, T. Walton, W. Feldmeier, F. Leonard, A. Burenkov, K. Graham, J. Farine, V. Belov, G. Giroux, P. S. Barbeau, C. K. Hargrove, Martin Auger, K. Hall, R. DeVoe, Petr Vogel, T. N. Johnson, Y.-R. Yen, V.N. Stekhanov, Marc Weber, I. Ostrovskiy, A. Piepke, D. J. Auty, K. O'Sullivan, S. Slutsky, K. Pushkin, O. Ya. Zeldovich, U. Wichoski, J. L. Vuilleumier, M. Montero Díez, R. MacLellan, A.C. Odian, Liang Yang, R. Neilson, D. Mackay, Peter Fierlinger, D. Franco, Michael G. Marino, A. S. Johnson, A. Kuchenkov, J. Wodin, B. Cleveland, M. J. Dolinski, C. G. Davis, Martin Breidenbach, T. Daniels, C. Y. Prescott, S. Herrin, C. R. Hall, A. Dolgolenko, L. J. Kaufman, A. Karelin, R. Nelson, A. Dobi, J. J. Russell, K. S. Kumar, B. Mong, M. Danilov, Giorgio Gratta, David A. Sinclair, K. Twelker, T. Tolba, S. Cook, J. D. Wright, David Leonard, and W. M. Fairbank

Subjects
Physics, Particle physics, Time projection chamber, Isotope, 010308 nuclear & particles physics, FOS: Physical sciences, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Beta decay, Lower limit, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), MAJORANA, Double beta decay, 0103 physical sciences, Neutron, Nuclear Experiment (nucl-ex), Neutrino, 010306 general physics, Nuclear Experiment
Abstract

Several properties of neutrinos, such as their absolute mass, their possible Majorana nature or the mechanisms that lead to small neutrino masses, are still unknown. The EXO-200 experiment is trying to answer some of these questions by searching for the hypothetical neutrinoless double beta decay of the isotope 136 Xe. This thesis describes an analysis of two years of detector data, which yields a lower limit on the half-life of neutrinoless double beta decay of 136 Xe of 1.1·10 25 years.

Published
2012
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32. 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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