Searching for neutrinoless double beta decay with GERDA

GERDA Collaboration,; Agostini, M.; Bakalyarov, A.M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Bettini, A.; Bezrukov, L.; Bode, T.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E.V.; Di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hiller, R.; Hofmann, W.; Hult, M.; Inzhechik, L.V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kermaidic, Y.; Kihm, T.; Kirpichnikov, I.V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K.T.; Kochetov, O.; Kornoukhov, V.N.; Kuzminov, V.V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V.I.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Panas, K.; Pandola, L.; Pullia, A.; Ransom, C.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Schmitt, C.; Schneider, B.; Schreiner, J.; Schulz, O.; Schwingenheuer, B.; Schönert, S.; Schütz, A-K.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A.A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S.V.; Zinatulina, D.; Zsigmond, A.J.; Zuber, K.; Zuzel, G.

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Searching for neutrinoless double beta decay with GERDA

MPS-Authors

GERDA Collaboration,
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Agostini, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bakalyarov, A.M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Balata, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Barabanov, I.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Baudis, L.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bauer, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bellotti, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Belogurov, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bettini, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bezrukov, L.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Bode, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Brudanin, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Brugnera, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Caldwell, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Cattadori, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Chernogorov, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

D'Andrea, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Demidova, E.V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Di Marco, N.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Domula, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Doroshkevich, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Egorov, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Falkenstein, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Gangapshev, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Garfagnini, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Gooch, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Grabmayr, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Gurentsov, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Gusev, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hakenmüller, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hegai, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Heisel, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hemmer, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hiller, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hofmann, W.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Hult, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Inzhechik, L.V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Janicskó Csáthy, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Jochum, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Junker, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kazalov, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kermaidic, Y.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kihm, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kirpichnikov, I.V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kirsch, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kish, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Klimenko, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kneißl, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Knöpfle, K.T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kochetov, O.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kornoukhov, V.N.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Kuzminov, V.V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Laubenstein, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lazzaro, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lebedev, V.I.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lindner, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lippi, I.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lubashevskiy, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lubsandorzhiev, B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lutter, G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Macolino, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Majorovits, B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Maneschg, W.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Miloradovic, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Mingazheva, R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Misiaszek, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Moseev, P.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Nemchenok, I.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Panas, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Pandola, L.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Pullia, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Ransom, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Riboldi, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Rumyantseva, N.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Sada, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Salamida, F.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schmitt, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schneider, B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schreiner, J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schulz, O.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schwingenheuer, B.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schönert, S.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schütz, A-K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Selivanenko, O.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Shevchik, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Shirchenko, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Simgen, H.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Smolnikov, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Stanco, L.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Vanhoefer, L.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Vasenko, A.A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Veresnikova, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

von Sturm, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Wagner, V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Wegmann, A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Wester, T.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Wiesinger, C.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Wojcik, M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Yanovich, E.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zhitnikov, I.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zhukov, S.V.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zinatulina, D.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zsigmond, A.J.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zuber, K.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Zuzel, G.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

GERDA Collaboration, Agostini, M., Bakalyarov, A., Balata, M., Barabanov, I., Baudis, L., et al. (2020). Searching for neutrinoless double beta decay with GERDA. Journal of Physics: Conference Series, 1342, 012005.

Cite as: https://hdl.handle.net/21.11116/0000-0008-1B45-D

Abstract

The GERmanium Detector Array (GERDA) experiment located at the INFN Gran Sasso Laboratory (Italy), is looking for the neutrinoless double beta decay of Ge76, by using high-purity germanium detectors made from isotopically enriched material. The combination of the novel experimental design, the careful material selection for radio-purity and the active/passive shielding techniques result in a very low residual background at the Q-value of the decay, about 1e-3 counts/(keV kg yr). This makes GERDA the first experiment in the field to be background-free for the complete design exposure of 100 kg yr. A search for neutrinoless double beta decay was performed with a total exposure of 47.7 kg yr: 23.2 kg yr come from the second phase (Phase II) of the experiment, in which the background is reduced by about a factor of ten with respect to the previous phase. The analysis presented in this paper includes 12.4 kg yr of new Phase II data. No evidence for a possible signal is found: the lower limit for the half-life of Ge76 is 8.0e25 yr at 90% CL. The experimental median sensitivity is 5.8e25 yr. The experiment is currently taking data. As it is running in a background-free regime, its sensitivity grows linearly with exposure and it is expected to surpass 1e26 yr within 2018.