| Autor: |
Christian Bauer, A. Lubashevskiy, Oliver Schulz, Alberto Pullia, V. I. Gurentsov, I. R. Barabanov, M. Heisel, C. Macolino, A. Garfagnini, S. V. Zhukov, M. Balata, Bayarto Lubsandorzhiev, J. Schreiner, L. Vanhoefer, T. Bode, E. Doroshkevich, R. Brugnera, M. Salathe, V. V. Kazalov, V. V. Kuzminov, J. Janicsko, Manfred Lindner, T. Wester, Matteo Agostini, A.A. Smolnikov, D. R. Zinatulina, Matthias Laubenstein, C. Cattadori, Kai Zuber, Allen Caldwell, Ivano Lippi, V. Egorov, Josef Jochum, D. Palioselitis, A. Kish, S. Schoenert, K. N. Gusev, A. K. Schuetz, E. Medinaceli, V. Wagner, O. Selivanenko, J. Janicskó Csáthy, Marcin Wójcik, V. D'Andrea, W. Maneschg, C. Gooch, E. A. Yanovich, K. T. Knoepfle, Cinzia Sada, P. Grabmayr, Stefano Riboldi, A. A. Vasenko, K. von Sturm, Giovanni Benato, A. Lazzaro, A. Domula, A. Hegai, E. V. Demidova, Mikael Hult, I. Zhitnikov, M. Misiaszek, B. Schwingenheuer, B. Lehnert, G. Zuzel, C. Wiesinger, R. Mingazheva, M. Shirchenko, M. Allardt, N. Di Marco, V. I. Lebedev, V.B. Brudanin, Hardy Simgen, V. N. Kornoukhov, K. Pelczar, S. Hemmer, Alessandro Bettini, P. Moseev, Luciano Pandola, R. Kneissl, A. Kirsch, S. Belogurov, A. A. Klimenko, Laura Baudis, A. V. Veresnikova, J. Hakenmüller, Guillaume Lutter, A. M. Bakalyarov, D. Borowicz, A. Chernogorov, N. Rumyantseva, K. Panas, B. Schneider, H. Y. Liao, Werner Hofmann, R. Falkenstein, I. V. Kirpichnikov, Luca Stanco, C. Schmitt, M. Miloradovic, A. Wegmann, Igor Nemchenok, F. Salamida, Bela Majorovits, M. Junker, L. B. Bezrukov, E. Shevchik, Thomas Kihm, E. Bellotti, N. Frodyma, O.I. Kochetov, S. T. Belyaev, A. M. Gangapshev, L. V. Inzhechik |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Proceedings of 38th International Conference on High Energy Physics — PoS(ICHEP2016). |
| Popis: |
The GERmanium Detector Array (GERDA) experiment, located at the Gran Sasso underground laboratory in Italy, is built for the search of $0\nu\beta\beta$ decay in $^{76}$Ge. GERDA operates bare high purity germanium detectors submersed in liquid Argon (LAr). Phase I of the experiment was completed reaching an exposure of about 21 kg$\cdot$yr with a background level of $10^{-2}$ cts/(ke V $\cdot$ kg $\cdot$ yr). GERDA Phase I set a limit on the $0\nu\beta\beta$ decay of $^{76}$Ge of $T_{1/2}^{0\nu} > 2.1 \cdot 10^{25}$ yr. In Phase II 35 kg of germanium detectors enriched in $^{76}$Ge are operated to reach an exposure of 100 kg$\cdot$yr. The design goal is to reduce the background by one order of magnitude to reach the sensitivity for $T_{1/2}^{0\nu} = \mathcal{O} (10^{26} )$ yr. The Phase II setup comprises thirty newly produced Broad Energy Germanium (BEGe) detectors. They contribute to the background reduction with better energy resolution and enhanced pulse shape discrimination. To achieve the necessary background reduction, the setup was complemented with LAr veto. The hardware upgrade for Phase II was finished and all detectors were deployed in December 2015. We present the first results of Phase II with 10.8 kg$\cdot$yr exposure reached in June 2016. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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