Improved limit on neutrinoless double beta decay of $^{76}$Ge from GERDA Phase II
Abstract
The GERDA experiment searches for the lepton number violating neutrinoless double beta decay of Ge (Ge Se + 2e) operating bare Ge diodes with an enriched Ge fraction in liquid argon. The exposure for BEGe-type detectors is increased threefold with respect to our previous data release. The BEGe detectors feature an excellent background suppression from the analysis of the time profile of the detector signals. In the analysis window a background level of cts/(keVkgyr) has been achieved; if normalized to the energy resolution this is the lowest ever achieved in any 0 experiment. No signal is observed and a new 90 \% C.L. lower limit for the half-life of yr is placed when combining with our previous data. The median expected sensitivity assuming no signal is yr.
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Cite
@article{arxiv.1803.11100,
title = {Improved limit on neutrinoless double beta decay of $^{76}$Ge from GERDA Phase II},
author = {M. Agostini and A. M. Bakalyarov and M. Balata and I. Barabanov and L. Baudis and C. Bauer and E. Bellotti and S. Belogurov and A. Bettini and L. Bezrukov and J. Biernat and T. Bode and D. Borowicz and V. Brudanin and R. Brugnera and A. Caldwell and C. Cattadori and A. Chernogorov and T. Comellato and V. D'Andrea and E. V. Demidova and N. Di Marco and A. Domula and E. Doroshkevich and V. Egorov and R. Falkenstein and A. Gangapshev and A. Garfagnini and P. Grabmayr and V. Gurentsov and K. Gusev and J. Hakenmüller and A. Hegai and M. Heisel and S. Hemmer and R. Hiller and W. Hofmann and M. Hult and L. V. Inzhechik and J. Janicskó Csáthy and J. Jochum and M. Junker and V. Kazalov and Y. Kermaidic and T. Kihm and I. V. Kirpichnikov and A. Kirsch and A. Kish and A. Klimenko and R. Kneißl and K. T. Knöpfle and O. Kochetov and V. N. Kornoukhov and V. V. Kuzminov and M. Laubenstein and A. Lazzaro and M. Lindner and I. Lippi and A. Lubashevskiy and B. Lubsandorzhiev and G. Lutter and C. Macolino and B. Majorovits and W. Maneschg and M. Miloradovic and R. Mingazheva and M. Misiaszek and P. Moseev and I. Nemchenok and K. Panas and L. Pandola and K. Pelczar and L. Pertoldi and A. Pullia and C. Ransom and S. Riboldi and N. Rumyantseva and C. Sada and F. Salamida and C. Schmitt and B. Schneider and S. Schönert and A-K. Schütz and O. Schulz and B. Schwingenheuer and O. Selivanenko and E. Shevchik and M. Shirchenko and H. Simgen and A. Smolnikov and L. Stanco and L. Vanhoefer and A. A. Vasenko and A. Veresnikova and K. von Sturm and V. Wagner and A. Wegmann and T. Wester and C. Wiesinger and M. Wojcik and E. Yanovich and I. Zhitnikov and S. V. Zhukov and D. Zinatulina and A. Zschocke and A. J. Zsigmond and K. Zuber and G. Zuzel},
journal= {arXiv preprint arXiv:1803.11100},
year = {2018}
}
Comments
5 pages, 2 figures