/ nucl-ex arXiv:1307.4720

Results on neutrinoless double beta decay of 76Ge from GERDA Phase I

Agostini, M. (Munich, Tech. U.) ; Allardt, M. (Dresden, Tech. U.) ; Andreotti, E. (Euratom, Geel) ; 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) ; D. Budja s (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) ; Domula, A. (Dresden, Tech. U.) ; Egorov, V. (Dubna, JINR) ; Falkenstein, R. (Tubingen U.) ; Ferella, A. (Zurich U.) ; Freund, K. (Tubingen U.) ; Frodyma, N. (Jagiellonian U.) ; Gangapshev, A. (Heidelberg, Max Planck Inst.) ; Garfagnini, A. (INFN, Padua) ; Gotti, C. (INFN, Milan Bicocca) ; 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) ; Kihm, T. (Heidelberg, Max Planck Inst.) ; 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) ; Kuzminov, V.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. (Munich, Max Planck Inst.) ; Lubashevskiy, A. (Heidelberg, Max Planck Inst.) ; Lubsandorzhiev, B. (Moscow, INR) ; Lutter, G. (Euratom, Geel) ; Macolino, C. (Gran Sasso) ; Machado, A.A. (Heidelberg, Max Planck Inst.) ; Majorovits, B. (Munich, Max Planck Inst.) ; Maneschg, W. (Heidelberg, Max Planck Inst.) ; Misiaszek, M. (Jagiellonian U.) ; Nemchenok, I. (Dubna, JINR) ; Nisi, S. (Gran Sasso) ; O'Shaughnessy, C. (Munich, Max Planck Inst.) ; Pandola, L. (Gran Sasso) ; Pelczar, K. (Jagiellonian U.) ; Pessina, G. (Milan U.) ; Pullia, A. (INFN, Milan) ; Riboldi, S. (INFN, Milan) ; Rumyantseva, N. (Dubna, JINR) ; Sada, C. (INFN, Padua) ; Salathe, M. (Heidelberg, Max Planck Inst.) ; Schmitt, C. (Tubingen U.) ; Schreiner, J. (Heidelberg, Max Planck Inst.) ; Schulz, O. (Munich, Max Planck Inst.) ; Schwingenheuer, B. (Heidelberg, Max Planck Inst.) ; Schonert, S. (Munich, Tech. U.) ; 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. (INFN, Padua) ; Wagner, V. (Heidelberg, Max Planck Inst.) ; Walter, M. (Zurich U.) ; Wegmann, A. (Heidelberg, Max Planck Inst.) ; Wester, T. (Dresden, Tech. U.) ; 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: 6

Abstract: Neutrinoless double beta decay is a process that violates lepton number conservation. It is predicted to occur in extensions of the Standard Model of particle physics. This Letter reports the results from Phase I of the GERmanium Detector Array (GERDA) experiment at the Gran Sasso Laboratory (Italy) searching for neutrinoless double beta decay of the isotope 76Ge. Data considered in the present analysis have been collected between November 2011 and May 2013 with a total exposure of 21.6 kgyr. A blind analysis is performed. The background index is about 1.10^{-2} cts/(keV kg yr) after pulse shape discrimination. No signal is observed and a lower limit is derived for the half-life of neutrinoless double beta decay of 76Ge, T_1/2 > 2.1 10^{25} yr (90% C.L.). The combination with the results from the previous experiments with 76Ge yields T_1/2 > 3.0 10^{25} yr (90% C.L.).

Web-Page: http://inspirehep.net/record/1243202/files/fig01-spectrum-onbb.png; http://inspirehep.net/record/1243202/files/fig02-0nbb_comp_thalf.png; http://inspirehep.net/record/1243202/files/arXiv%3A1307.4720.pdf

Note: *Brief entry*; *Temporary entry*; 6 pages, 2 figures

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