Final Results of GERDA on the Search for Neutrinoless Double-β Decay.

The GERmanium Detector Array (GERDA) experiment searched for the lepton-number-violating neutrinoless double-β (0νββ) decay of ^{76}Ge, whose discovery would have far-reaching implications in cosmology and particle physics. By operating bare germanium diodes, enriched in ^{76}Ge, in an active liquid argon shield, GERDA achieved an unprecedently low background index of 5.2×10^{-4} counts/(keV kg yr) in the signal region and met the design goal to collect an exposure of 100 kg yr in a background-free regime. When combined with the result of Phase I, no signal is observed after 127.2 kg yr of total exposure. A limit on the half-life of 0νββ decay in ^{76}Ge is set at T_{1/2}>1.8×10^{26}  yr at 90% C.L., which coincides with the sensitivity assuming no signal.

M. Misiaszek | K. Knöpfle | A. Caldwell | B. Majorovits | I. Lippi | A. Pullia | A. Zsigmond | C. Bauer | P. Piseri | E. Bellotti | M. Laubenstein | W. Maneschg | S. Schönert | H. Simgen | G. Zuzel | R. Brugnera | A. Garfagnini | L. Pandola | W. Hofmann | F. Fischer | A. Bettini | K. Zuber | M. Lindner | B. Schwingenheuer | J. Jochum | B. Lubsandorzhiev | S. Belogurov | I. Kirpichnikov | A. Klimenko | A. Smolnikov | A. Vasenko | I. Nemchenok | C. Vignoli | M. Agostini | A. Bakalyarov | M. Balata | I. Barabanov | L. Baudis | L. Bezrukov | V. Brudanin | C. Cattadori | A. Chernogorov | E. Demidova | A. Gangapshev | P. Grabmayr | V. Gurentsov | K. Gusev | S. Hemmer | M. Hult | L. Inzhechik | J. Janicskó Csáthy | M. Junker | T. Kihm | O. Kochetov | V. Kornoukhov | V. Kuzminov | A. Lazzaro | A. Lubashevskiy | G. Lutter | C. Macolino | K. Pelczar | S. Riboldi | N. Rumyantseva | C. Sada | J. Schreiner | O. Schulz | E. Shevchik | M. Shirchenko | K. von Sturm | T. Wester | E. Yanovich | I. Zhitnikov | S. Zhukov | D. Zinatulina | N. Di Marco | D. Borowicz | V. D’Andrea | E. Doroshkevich | C. Gooch | J. Hakenmüller | J. J. Csáthy | V. Kazalov | R. Kneissl | M. Miloradovic | R. Mingazheva | P. Moseev | K. Panas | F. Salamida | A. Schütz | O. Selivanenko | A. Veresnikova | C. Wiesinger | T. Comellato | R. Hiller | L. Pertoldi | C. Ransom | A. Zschocke | N. Marco | P. Krause | M. Schwarz | V. Bothe | K. Sturm | B. Zatschler | Y. Kermaïdic | L. Manzanillas | M. Fomina | D. Stukov | L. Shtembari | F. Fischer | G. Araujo | E. Bossio | M. Schütt | M. Wójcik | J. Csáthy | V. Biancacci | J. Huang | H. Khushbakht | L. Rauscher | Y. Müller | V. Kuzminov

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