/ Experiment-HEP arXiv:1212.3210

Measurement of the half-life of the two-neutrino double beta decay of Ge-76 with the Gerda experiment

Agostini, M. (Munich, Tech. U.) ; Allardt, M. (Dresden, Tech. U.) ; Andreotti, E. (Tubingen U.) ; Bakalyarov, A.M. (Kurchatov Inst., Moscow) ; Balata, M. (Gran Sasso) ; Barabanov, I. (Moscow, INR) ; Heider, M.Barnabe (Munich, Tech. U.) ; Barros, N. (Dresden, Tech. U.) ; Baudis, L. (Zurich U.) ; Bauer, C. (Heidelberg, Max Planck Inst.) ; Becerici-Schmidt, N. (Munich, Max Planck Inst.) ; Bellotti, E. (INFN, Milan Bicocca) ; Belogurov, S. (Moscow, INR) ; Belyaev, S.T. (Kurchatov Inst., Moscow) ; Benato, G. (Zurich U.) ; Bettini, A. (INFN, Padua) ; Bezrukov, L. (Moscow, INR) ; Bode, T. (Munich, Tech. U.) ; Brudanin, V. (Dubna, JINR) ; Brugnera, R. (INFN, Padua) ; s, D.Budja (Munich, Tech. U.) ; Caldwell, A. (Munich, Max Planck Inst.) ; Cattadori, C. (INFN, Milan Bicocca) ; Chernogorov, A. (Moscow, ITEP) ; Cossavella, F. (Munich, Max Planck Inst.) ; Demidova, E.V. (Moscow, ITEP) ; Denisov, A. (Moscow, INR) ; Domula, A. (Dresden, Tech. U.) ; Egorov, V. (Dubna, JINR) ; Falkenstein, R. (Tubingen U.) ; Ferella, A.D. (Zurich U.) ; Freund, K. (Tubingen U.) ; Froborg, F. (Zurich U.) ; Frodyma, N. (Jagiellonian U.) ; Gangapshev, A. (Heidelberg, Max Planck Inst.) ; Garfagnini, A. (INFN, Padua) ; Gazzana, S. (Heidelberg, Max Planck Inst.) ; Grabmayr, P. (Tubingen U.) ; Gurentsov, V. (Moscow, INR) ; Gusev, K. (Munich, Tech. U.) ; Guthikonda, K.K. (Zurich U.) ; Hampel, W. (Heidelberg, Max Planck Inst.) ; Hegai, A. (Tubingen U.) ; Heisel, M. (Heidelberg, Max Planck Inst.) ; Hemmer, S. (INFN, Padua) ; Heusser, G. (Heidelberg, Max Planck Inst.) ; Hofmann, W. (Heidelberg, Max Planck Inst.) ; Hult, M. (Euratom, Geel) ; Inzhechik, L.V. (Moscow, INR) ; Ioannucci, L. (Gran Sasso) ; Csathy, J.Janicsko (Munich, Tech. U.) ; Jochum, J. (Tubingen U.) ; Junker, M. (Gran Sasso) ; Kianovsky, S. (Moscow, INR) ; Kirpichnikov, I.V. (Moscow, ITEP) ; Kirsch, A. (Heidelberg, Max Planck Inst.) ; Klimenko, A. (Heidelberg, Max Planck Inst.) ; Knopfle, K.T. (Heidelberg, Max Planck Inst.) ; Kochetov, O. (Dubna, JINR) ; Kornoukhov, V.N. (Moscow, INR) ; Kusminov, V. (Moscow, INR) ; Laubenstein, M. (Gran Sasso) ; Lazzaro, A. (Munich, Tech. U.) ; Lebedev, V.I. (Kurchatov Inst., Moscow) ; Lehnert, B. (Dresden, Tech. U.) ; Liao, H.Y. (Munich, Max Planck Inst.) ; Lindner, M. (Heidelberg, Max Planck Inst.) ; Lippi, I. (INFN, Padua) ; Liu, X. (Shanghai Jiaotong U.) ; Lubashevskiy, A. (Heidelberg, Max Planck Inst.) ; Lubsandorzhiev, B. (Moscow, INR) ; Lutter, G. (Euratom, Geel) ; Machado, A.A. (Heidelberg, Max Planck Inst.) ; Majorovits, B. (Munich, Max Planck Inst.) ; Maneschg, W. (Heidelberg, Max Planck Inst.) ; Nemchenok, I. (Dubna, JINR) ; Nisi, S. (Gran Sasso) ; O'Shaughnessy, C. (Munich, Max Planck Inst.) ; Pandola, L. (Gran Sasso) ; Pelczar, K. (Jagiellonian U.) ; Peraro, L. (INFN, Padua) ; Pullia, A. (INFN, Milan) ; Riboldi, S. (INFN, Milan) ; Ritter, F. (Tubingen U.) ; Sada, C. (INFN, Padua) ; Salathe, M. (Heidelberg, Max Planck Inst.) ; Schmitt, C. (Tubingen U.) ; Schonert, S. (Munich, Tech. U.) ; Schreiner, J. (Heidelberg, Max Planck Inst.) ; Schulz, O. (Munich, Max Planck Inst.) ; Schwingenheuer, B. (Heidelberg, Max Planck Inst.) ; Shevchik, E. (Dubna, JINR) ; Shirchenko, M. (Dubna, JINR) ; Simgen, H. (Heidelberg, Max Planck Inst.) ; Smolnikov, A. (Heidelberg, Max Planck Inst.) ; Stanco, L. (INFN, Padua) ; Strecker, H. (Heidelberg, Max Planck Inst.) ; Tarka, M. (Zurich U.) ; Ur, C.A. (INFN, Padua) ; Vasenko, A.A. (Moscow, ITEP) ; Volynets, O. (Munich, Max Planck Inst.) ; von Sturm, K. (Tubingen U.) ; Walter, M. (Zurich U.) ; Wegmann, A. (Heidelberg, Max Planck Inst.) ; Wojcik, M. (Jagiellonian U.) ; Yanovich, E. (Moscow, INR) ; Zavarise, P. (Gran Sasso) ; Zhitnikov, I. (Dubna, JINR) ; Zhukov, S.V. (Kurchatov Inst., Moscow) ; Zinatulina, D. (Dubna, JINR) ; Zuber, K. (Dresden, Tech. U.) ; Zuzel, G. (Jagiellonian U.)

Pages: 14

Abstract: The primary goal of the GERmanium Detector Array (Gerda) experiment at the Laboratori Nazionali del Gran Sasso of INFN is the search for the neutrinoless double beta decay of Ge-76. High-purity germanium detectors made from material enriched in Ge-76 are operated directly immersed in liquid argon, allowing for a substantial reduction of the background with respect to predecessor experiments. The first 5.04 kg yr of data collected in Phase I of the experiment have been analyzed to measure the half-life of the neutrino-accompanied double beta decay of Ge-76. The observed spectrum in the energy range between 600 and 1800 keV is dominated by the double beta decay of Ge-76. The half-life extracted from Gerda data is T(1/2) = (1.84 +0.14 -0.10) 10^{21} yr.

Web-Page: http://inspirehep.net/record/1207266/files/arXiv:1212.3210.pdf; http://inspirehep.net/record/1207266/files/DecompLinLog_ComparisonRatio.png; http://inspirehep.net/record/1207266/files/GERDA-Modell_2.png; http://inspirehep.net/record/1207266/files/fullspectrum.png; http://inspirehep.net/record/1207266/files/publicationhistory.png

Note: 14 pages, 2 figures, submitted to J. Phys. G: Nucl. Part. Phys

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