Results on \(\beta\beta\) decay with emission of two neutrinos or Majorons in \(^{76}\)Ge from GERDA Phase I

Results on \(\beta\beta\) decay with emission of two neutrinos or Majorons in \(^{76}\)Ge from GERDA Phase I

A search for neutrinoless \(\beta\beta\) decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Processes with spectral indices n = 1, 2, 3...

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Veröffentlicht in:arXiv.org 2015-01
Hauptverfasser: Agostini, M, Allardt, M, Bakalyarov, A M, Balata, M, Barabanov, I, Barros, N, Baudis, L, Becerici-Schmidt, N, Bellotti, E, Belogurov, S, Belyaev, S T, Benato, G, Bettini, A, Bode, T, Borowicz, D, Brudanin, V, Brugnera, R, Budjáš, D, Caldwell, A, Cattadori, C, Chernogorov, A, D'Andrea, V, Demidova, E V, A di Vacri, Doroshkevich, E, Egorov, V, Falkenstein, R, Fedorova, O, Freund, K, Gangapshev, A, Garfagnini, A, Grabmayr, P, Gusev, K, Hegai, A, Heisel, M, Hemmer, S, Heusser, G, Hofmann, W, Hult, M, Inzhechik, L V, Csáthy, J Janicskó, Jochum, J, Junker, M, Kazalov, V, Kihm, T, 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, Lubashevskiy, A, Lubsandorzhiev, B, Lutter, G, Macolino, C, Majorovits, B, Maneschg, W, Medinaceli, E, Misiaszek, M, Palioselitis, D, Panas, K, Pandola, L, Pullia, A, Rumyantseva, N, Sada, C, Salathe, M, Schmitt, C, Schreiner, J, Schulz, O, Schönert, S, Selivanenko, O, Shirchenko, M, Simgen, H, Smolnikov, A, Stanco, L, Stepaniuk, M, Ur, C A, Vanhoefer, L, Vasenko, A A, Veresnikova, A, K von Sturm, Wagner, V, Walter, M, Wegmann, A, Wester, T, Wilsenach, H, Wojcik, M, Yanovich, E, Zhitnikov, I, Zhukov, S V, Zinatulina, D, Zuber, K, Zuzel, G
Format: Artikel
Sprache:eng
Schlagworte:
Beta decay
Bosons
Emission
Germanium
Half-life
Neutrinos
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Zusammenfassung:A search for neutrinoless \(\beta\beta\) decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Processes with spectral indices n = 1, 2, 3, 7 were searched for. No signals were found and lower limits of the order of 10\(^{23}\) yr on their half-lives were derived, yielding substantially improved results compared to previous experiments with \(^{76}\)Ge. A new result for the half-life of the neutrino-accompanied \(\beta\beta\) decay of \(^{76}\)Ge with significantly reduced uncertainties is also given, resulting in \(T^{2\nu}_{1/2} = (1.926 \pm 0.095)\cdot10^{21}\) yr.
ISSN:2331-8422
DOI:10.48550/arxiv.1501.02345