Search for Neutrinoless Double Beta Decay with GERDA Phase II
- Agostini, M.
- Bakalyarov, A.
- Balata, M.
- Barabanov, I.
- Baudis, L.
- Bauer, C.
- Bellotti, E.
- Belogurov, S.
- Bettini, A.
- Bezrukov, L.
- Bode, T.
- Borowicz, D.
- Brudanin, V.
- Brugnera, R.
- Caldwell, A.
- Cattadori, C.
- Chernogorov, A.
- D'Andrea, V.
- Demidova, E.
- Di Marco, N.
- Domula, A.
- Doroshkevich, E.
- Egorov, V.
- Falkenstein, R.
- Gangapshev, A.
- Garfagnini, A.
- Gooch, C.
- Grabmayr, P.
- Gurentsov, V.
- Gusev, K.
- Hakenmueller, J.
- Hegai, A.
- Heisel, M.
- Hemmer, S.
- Hofmann, W.
- Hult, M.
- Inzhechik, L.
- Csathy, J.
- Jochum, J.
- Junker, M.
- Kazalov, V.
- Kihm, T.
- Kirpichnikov, I.
- Kirsch, A.
- Kish, A.
- Klimenko, A.
- Kneissl, R.
- Knies, J.
- Knoepfle, K.
- Kochetov, O.
- Kornoukhov, V.
- Kuzminov, V.
- Laubenstein, M.
- Lazzaro, A.
- Lebedev, V.
- Liao, H.
- Lindner, M.
- Lippi, I.
- Lubashevskiy, A.
- Lubsandorzhiev, B.
- Lutter, G.
- Majorovits, B.
- Maneschg, W.
- Marissens, G.
- Miloradovic, M.
- Mingazheva, R.
- Misiaszek, M.
- Moseev, P.
- Nemchenok, I.
- Panas, K.
- Pandola, L.
- Pelczar, K.
- Pullia, A.
- Ransom, C.
- Reissfelder, M.
- Riboldi, S.
- Rumyantseva, N.
- Sada, C.
- Salamida, F.
- Schmitt, C.
- Schneider, B.
- Schoenert, S.
- Schreiner, J.
- Schulz, O.
- Schuetz, A.
- Schwingenheuer, B.
- Seitz, H.
- Selivanenko, O.
- Shevchik, E.
- Shirchenko, M.
- Simgen, H.
- Smolnikov, A.
- Stanco, L.
- Vanhoefer, L.
- Vasenko, A.
- Veresnikova, A.
- von Sturm, K.
- Wagner, V.
- Wegmann, A.
- Wester, T.
- Wiesinger, C.
- Wojcik, M.
- Yanovich, E.
- Zhitnikov, I.
- Zhukov, S.
- Zinatulina, D.
- Zuber, K.
- Zuzel, G.
DOIAbstract
The GERmanium Detector Array (gerda) experiment, located at the Gran Sasso underground laboratory in Italy, is one of the leading experiments for the search of 0 nu beta beta decay. In Phase II of the experiment 35.6 kg of enriched germanium detectors are operated. The application of active background rejection methods, such as a liquid argon scintillation light read-out and pulse shape discrimination of germanium detector signals, allowed to reduce the background index to the intended level of 10(-3) cts/(keV.kg.yr). In the first five month of data taking 10.8 kg yr of exposure were accumulated. No signal has been found and together with data from Phase I a new limit for the neutrinoless double beta decay half-life of Ge-76 of 5.3 . 10(25)...
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