Results on ββ decay with emission of two neutrinos or Majorons in ⁷⁶Ge from GERDA Phase I
Agostini, M. · Allardt, M. · Bakalyarov, A. M. · Balata, M. · Barabanov, I. · Barros, N. · Baudis, L. · Bauer, C. · Becerici-Schmidt, N. · Bellotti, E. · Belogurov, S. · Belyaev, S. T. · Benato, G. · Bettini, A. · Bezrukov, L. · Bode, T. · Borowicz, D. · Brudanin, V. · Brugnera, R. · Budjáš, D. · Caldwell, A. · Cattadori, C. · Chernogorov, A. · D'Andrea, V. · Demidova, E. V. · di Vacri, A. · Domula, A. · Doroshkevich, E. · Egorov, V. · Falkenstein, R. · Fedorova, O. · Freund, K. · Frodyma, N. · Gangapshev, A. · Garfagnini, A. · Grabmayr, P. · Gurentsov, V. · 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. · 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. · Lubashevskiy, A. · Lubsandorzhiev, B. · Lutter, G. · Macolino, C. · Majorovits, B. · Maneschg, W. · Medinaceli, E. · Misiaszek, M. · Moseev, P. · Nemchenok, I. · Palioselitis, D. · Panas, K. · Pandola, L. · Pelczar, K. · Pullia, A. · Riboldi, S. · Rumyantseva, N. · Sada, C. · Salathe, M. · Schmitt, C. · Schreiner, J. · Schulz, O. · Schwingenheuer, B. · Schönert, S. · Selivanenko, O. · Shirchenko, M. · Simgen, H. · Smolnikov, A. · Stanco, L. · Stepaniuk, M. · Ur, C. A. · Vanhoefer, L. · Vasenko, A. A. · Veresnikova, A. · von Sturm, K. · Wagner, V. · Walter, M. · Wegmann, A. · Wester, T. · Wilsenach, H. · Wojcik, M. · Yanovich, E. · Zavarise, P. · Zhitnikov, I. · Zhukov, S. V. · Zinatulina, D. · Zuber, K. · Zuzel, G.
الأصل · EN
A search for neutrinoless ββ 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 10²³ yr on their half-lives were derived, yielding substantially improved results compared to previous experiments with ⁷⁶Ge. A new result for the half-life of the neutrino-accompanied ββ decay of ⁷⁶Ge with significantly reduced uncertainties is also given, resulting in T²ν₁/₂ = (1.926 ± 0.095)·10²¹ yr.
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