Muon capture on light isotopes measured with the Double Chooz detector

Y. Abe, T. Abrahão, H. Almazan, C. Alt, S. Appel, J. C. Barriere, E. Baussan, I. Bekman, M. Bergevin, T. J C Bezerra, L. Bezrukov, E. Blucher, T. Brugière, C. Buck, J. Busenitz, A. Cabrera, L. Camilleri, R. Carr, M. Cerrada, E. ChauveauP. Chimenti, A. P. Collin, E. Conover, J. M. Conrad, J. I. Crespo-Anadón, K. Crum, A. S. Cucoanes, E. Damon, J. V. Dawson, H. De Kerret, J. Dhooghe, D. Dietrich, Z. Djurcic, J. C. Dos Anjos, M. Dracos, A. Etenko, M. Fallot, J. Felde, S. M. Fernandes, V. Fischer, D. Franco, M. Franke, H. Furuta, I. Gil-Botella, L. Giot, M. Göger-Neff, H. Gomez, L. F G Gonzalez, L. Goodenough, M. C. Goodman, N. Haag, T. Hara, J. Haser, D. Hellwig, M. Hofmann, G. A. Horton-Smith, A. Hourlier, M. Ishitsuka, J. Jochum, C. Jollet, F. Kaether, L. N. Kalousis, Y. Kamyshkov, M. Kaneda, D. M. Kaplan, T. Kawasaki, E. Kemp, D. Kryn, M. Kuze, T. Lachenmaier, C. E. Lane, T. Lasserre, A. Letourneau, D. Lhuillier, H. P. Lima, M. Lindner, J. M. López-Castaño, J. M. Losecco, B. Lubsandorzhiev, S. Lucht, J. Maeda, C. Mariani, J. Maricic, J. Martino, T. Matsubara, G. Mention, A. Meregaglia, T. Miletic, R. Milincic, A. Minotti, Y. Nagasaka, D. Navas-Nicolás, P. Novella, L. Oberauer, M. Obolensky, A. Onillon, A. Osborn, C. Palomares, I. M. Pepe, S. Perasso, A. Porta, G. Pronost, J. Reichenbacher, B. Reinhold, M. Röhling, R. Roncin, B. Rybolt, Y. Sakamoto, R. Santorelli, A. C. Schilithz, S. Schönert, S. Schoppmann, M. H. Shaevitz, R. Sharankova, D. Shrestha, V. Sibille, V. Sinev, M. Skorokhvatov, E. Smith, M. Soiron, J. Spitz, A. Stahl, I. Stancu, L. F F Stokes, M. Strait, F. Suekane, S. Sukhotin, T. Sumiyoshi, Y. Sun, R. Svoboda, K. Terao, A. Tonazzo, H. H. Trinh Thi, G. Valdiviesso, N. Vassilopoulos, C. Veyssiere, M. Vivier, F. Von Feilitzsch, S. Wagner, N. Walsh, H. Watanabe, C. Wiebusch, M. Wurm, G. Yang, F. Yermia, V. Zimmer

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7 Scopus citations

Abstract

Using the Double Chooz detector, designed to measure the neutrino mixing angle θ13, the products of μ- capture on C12,C13,N14, and O16 have been measured. Over a period of 489.5 days, 2.3×106 stopping cosmic μ- have been collected, of which 1.8×105 captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. The resulting isotopes were tagged using prompt neutron emission (when applicable), the subsequent β decays, and, in some cases, β-delayed neutrons. The most precise measurement of the rate of C12(μ-,ν)B12 to date is reported: 6.57-0.21+0.11×103s-1, or (17.35-0.59+0.35)% of nuclear captures. By tagging excited states emitting γs, the ground state transition rate to B12 has been determined to be 5.68-0.23+0.14×103s-1. The heretofore unobserved reactions C12(μ-,να)Li8,C13(μ-,νnα)Li8, and C13(μ-,νn)B12 are measured. Further, a population of βn decays following stopping muons is identified with 5.5σ significance. Statistics limit our ability to identify these decays definitively. Assuming negligible production of He8, the reaction C13(μ-,να)Li9 is found to be present at the 2.7σ level. Limits are set on a variety of other processes.

Original languageEnglish (US)
Article number054608
JournalPhysical Review C
Volume93
Issue number5
DOIs
StatePublished - May 12 2016

Bibliographical note

Funding Information:
We acknowledge the support of the CEA, CNRS/IN2P3, the computer center CCIN2P3, and LabEx UnivEarthS in France (ANR-11-IDEX-0005-02); the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT) and the Japan Society for the Promotion of Science (JSPS); the Department of Energy and the National Science Foundation of the United States; U.S. Department of Energy Award No. DE-NA0000979 through the Nuclear Science and Security Consortium; the Ministerio de Economia y Competitividad (MINECO) of Spain; the Max Planck Gesellschaft, and the Deutsche Forschungsgemeinschaft DFG, the Transregional Collaborative Research Center TR27, the excellence cluster Origin and Structure of the Universe, and the Maier-Leibnitz-Laboratorium Garching in Germany; the Russian Academy of Science, the Kurchatov Institute and RFBR (the Russian Foundation for Basic Research); the Brazilian Ministry of Science, Technology and Innovation (MCTI), the Financiadora de Estudos e Projetos (FINEP), the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), the Sao Paulo Research Foundation (FAPESP), and the Brazilian Network for High Energy Physics (RENAFAE) in Brazil.

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