Results on neutrinoless double-$\beta$ decay of $^{76}Ge$ from phase I of the GERDA experiment
- Agostini, M.
- Allardt, M.
- Andreotti, E.
- Bakalyarov, A. M.
- Balata, M.
- Barabanov, I.
- Barnabé Heider, M.
- Barros, N.
- Baudis, L.
- Bauer, C.
- Becerici-Schmidt, N.
- Bellotti, E.
- Belogurov, S.
- Belyaev, S. T.
- Benato, G.
- Bettini, A.
- Bezrukov, L.
- Bode, T.
- Brudanin, V.
- Brugnera, R.
- Budjáš, D.
- Caldwell, A.
- Cattadori, C.
- Chernogorov, A.
- Cossavella, F.
- Demidova, E. V.
- Domula, A.
- Egorov, V.
- Falkenstein, R.
- Ferella, A.
- Freund, K.
- Frodyma, Nikodem
- Gangapshev, A.
- Garfagnini, A.
- Gotti, C.
- Grabmayr, P.
- Gurentsov, V.
- Gusev, K.
- Guthikonda, K. K.
- Hampel, W.
- Hegai, A.
- Heisel, M.
- Hemmer, S.
- Heusser, G.
- Hofmann, W.
- Hult, M.
- Inzhechik, L. V.
- Ioannucci, L.
- Janicskó Csáthy, J.
- Jochum, J.
- Junker, M.
- Kihm, T.
- Kirpichnikov, I. V.
- Kirsch, A.
- Klimenko, A.
- Knöpfle, K. T.
- Kochetov, O.
- Kornoukhov, V. N.
- Kuzminov, V. V.
- Laubenstein, M.
- Lazzaro, A.
- Lebedev, V. I.
- Lehnert, B.
- Liao, H. Y.
- Lindner, M.
- Lippi, I.
- Liu, X.
- Lubashevskiy, A.
- Lubsandorzhiev, B.
- Lutter, G.
- Macolino, C.
- Machado, A. A.
- Majorovits, B.
- Maneschg, W.
- Misiaszek, Marcin
- Nemchenok, I.
- Nisi, S.
- O’Shaughnessy, C.
- Pandola, L.
- Pelczar, Krzysztof
- Pessina, G.
- Pullia, A.
- Riboldi, S.
- Rumyantseva, N.
- Sada, C.
- Salathe, M.
- Schmitt, C.
- Schreiner, J.
- Schulz, O.
- Schwingenheuer, B.
- Schönert, S.
- Shevchik, E.
- Shirchenko, M.
- Simgen, H.
- Smolnikov, A.
- Stanco, L.
- Strecker, H.
- Tarka, M.
- Ur, C. A.
- Vasenko, A. A.
- Volynets, O.
- von Sturm, K.
- Wagner, V.
- Walter, M.
- Wegmann, A.
- Wester, T.
- Wójcik, Marcin
- Yanovich, E.
- Zavarise, P.
- Zhitnikov, I.
- Zhukov, S. V.
- Zinatulina, D.
- Zuber, K.
- Zuzel, Grzegorz
DOIAbstract
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 $^{76}Ge$. Data considered in the present analysis have been collected between November 2011 and May 2013 with a total exposure of 21.6 kg yr. A blind analysis is performed. The background index is about $1 \times 10^{-2}$ counts / (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 $^{76...
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