Final Results of GERDA on the Search for Neutrinoless Double-$\beta$ Decay
Abstract
The GERmanium Detector Array (GERDA) experiment searched for the lepton-number-violating neutrinoless double- () decay of Ge, whose discovery would have far-reaching implications in cosmology and particle physics. By operating bare germanium diodes, enriched in Ge, in an active liquid argon shield, GERDA achieved an unprecedently low background index of counts/(keVkgyr) in the signal region and met the design goal to collect an exposure of 100 kgyr in a background-free regime. When combined with the result of Phase I, no signal is observed after 127.2 kgyr of total exposure. A limit on the half-life of decay in Ge is set at yr at 90% C.L., which coincides with the sensitivity assuming no signal.
Keywords
Cite
@article{arxiv.2009.06079,
title = {Final Results of GERDA on the Search for Neutrinoless Double-$\beta$ Decay},
author = {GERDA collaboration and M. Agostini and G. R. Araujo 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 V. Biancacci and D. Borowicz and E. Bossio and V. Bothe 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 E. Doroshkevich and F. Fischer and M. Fomina and A. Gangapshev and A. Garfagnini and C. Gooch and P. Grabmayr and V. Gurentsov and K. Gusev and J. Hakenmüller and S. Hemmer and R. Hiller and W. Hofmann and J. Huang and M. Hult and L. V. Inzhechik and J. Janicskó Csáthy and J. Jochum and M. Junker and V. Kazalov and Y. Kermaïdic and H. Khushbakht and T. Kihm and I. V. Kirpichnikov and A. Klimenko and R. Kneißl and K. T. Knöpfle and O. Kochetov and V. N. Kornoukhov and P. Krause 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 L. Manzanillas and M. Miloradovic and R. Mingazheva and M. Misiaszek and P. Moseev and Y. Müller and I. Nemchenok and K. Panas and L. Pandola and K. Pelczar and L. Pertoldi and P. Piseri and A. Pullia and C. Ransom and L. Rauscher and S. Riboldi and N. Rumyantseva and C. Sada and F. Salamida and S. Schönert and J. Schreiner and M. Schütt and A. -K. Schütz and O. Schulz and M. Schwarz and B. Schwingenheuer and O. Selivanenko and E. Shevchik and M. Shirchenko and L. Shtembari and H. Simgen and A. Smolnikov and D. Stukov and A. A. Vasenko and A. Veresnikova and C. Vignoli and K. von Sturm and T. Wester and C. Wiesinger and M. Wojcik and E. Yanovich and B. Zatschler 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:2009.06079},
year = {2021}
}
Comments
7 pages, 3 figures, submitted to Physical Review Letters