Improved Limit on Neutrinoless Double-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math> Decay of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ge</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>76</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> from GERDA Phase II

M. Agostini; A. M. Bakalyarov; M. Balata; И. Р. Барабанов; L. Baudis; C. Bauer; E. Bellotti; S. Belogurov; A. Bettini; L. Bezrukov; J. Biernat; T. Bode; D. Borowicz; V. Brudanin; R. Brugnera; A. Caldwell; C. Cattadori; A. Chernogorov; T. Comellato; V. D’Andrea; E. V. Demidova; N. Di Marco; A. Domula; E. Doroshkevich; V. Egorov; R. Falkenstein; A. M. Gangapshev; A. Garfagnini; P. Grabmayr; V. Gurentsov; K. Gusev; J. Hakenmüller; A. Hegai; M. Heisel; S. Hemmer; R. Hiller; W. Hofmann; M. Hult; Л. В. Инжечик; J. Janicskó Csáthy; J. Jochum; M. Junker; V. Kazalov; Y. Kermaïdic; T. Kihm; I. V. Kirpichnikov; Andrea Kirsch; A. Kish; A. Klimenko; R. Kneißl; K.T. Knöpfle; O. Kochetov; В. Н. Корноухов; V. V. Kuzminov; M. Laubenstein; A. Lazzaro; M. Lindner; I. Lippi; A. Lubashevskiy; Б. Лубсандоржиев; G. Lutter; C. Macolino; B. Majorovits; W. Maneschg; M. Miloradovic; R. Mingazheva; M. Misiaszek; P. Moseev; I. Nemchenok; K. Panas; L. Pandola; K. Pelczar; L. Pertoldi; A. Pullia; C. Ransom; S. Riboldi; N. Rumyantseva; C. Sada; F. Salamida; C. Schmitt; B. Schneider; S. Schönert; A.-K. Schütz; O. Schulz; B. Schwingenheuer; O. Selivanenko; E. Shevchik; M. Shirchenko; H. Simgen; A. Smolnikov; L. Stančo; L. Vanhoefer; A. A. Vasenko; A. Veresnikova; K. von Sturm; V. Wagner; A. Wegmann; T. Wester; Christoph Wiesinger; M. Wójcik; E. Yanovich; I. Zhitnikov; S. V. Zhukov; D. Zinatulina; A. Zschocke; A. J. Zsigmond; Κ. Zuber; G. Zuzel

doi:10.1103/physrevlett.120.132503

Improved Limit on Neutrinoless Double-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math> Decay of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ge</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>76</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> from GERDA Phase II

M. Agostini(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), A. M. Bakalyarov(Kurchatov Institute), M. Balata(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), И. Р. Барабанов(Institute for Nuclear Research), L. Baudis(University of Zurich), C. Bauer(Max Planck Institute for Nuclear Physics), E. Bellotti(Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca), S. Belogurov(Kurchatov Institute), A. Bettini(University of Padua), L. Bezrukov(Institute for Nuclear Research), J. Biernat(Jagiellonian University), T. Bode(Excellence Cluster Universe), D. Borowicz(Joint Institute for Nuclear Research), V. Brudanin(Joint Institute for Nuclear Research), R. Brugnera(University of Padua), A. Caldwell(Max Planck Institute for Physics), C. Cattadori(Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca), A. Chernogorov(Kurchatov Institute), T. Comellato(Excellence Cluster Universe), V. D’Andrea(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), E. V. Demidova(Kurchatov Institute), N. Di Marco(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), A. Domula(Technische Universität Dresden), E. Doroshkevich(Institute for Nuclear Research), V. Egorov(Joint Institute for Nuclear Research), R. Falkenstein(University of Tübingen), A. M. Gangapshev(Institute for Nuclear Research), A. Garfagnini(University of Padua), P. Grabmayr(University of Tübingen), V. Gurentsov(Institute for Nuclear Research), K. Gusev(Kurchatov Institute), J. Hakenmüller(Max Planck Institute for Nuclear Physics), A. Hegai(University of Tübingen), M. Heisel(Max Planck Institute for Nuclear Physics), S. Hemmer(Istituto Nazionale di Fisica Nucleare, Sezione di Padova), R. Hiller(University of Zurich), W. Hofmann(Max Planck Institute for Nuclear Physics), M. Hult(European Commission), Л. В. Инжечик(Institute for Nuclear Research), J. Janicskó Csáthy(Excellence Cluster Universe), J. Jochum(University of Tübingen), M. Junker(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), V. Kazalov(Institute for Nuclear Research), Y. Kermaïdic(Max Planck Institute for Nuclear Physics), T. Kihm(Max Planck Institute for Nuclear Physics), I. V. Kirpichnikov(Kurchatov Institute), Andrea Kirsch(Max Planck Institute for Nuclear Physics), A. Kish(University of Zurich), A. Klimenko(Joint Institute for Nuclear Research), R. Kneißl(Max Planck Institute for Physics), K.T. Knöpfle(Max Planck Institute for Nuclear Physics), O. Kochetov(Joint Institute for Nuclear Research), В. Н. Корноухов(Kurchatov Institute), V. V. Kuzminov(Institute for Nuclear Research), M. Laubenstein(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), A. Lazzaro(Excellence Cluster Universe), M. Lindner(Max Planck Institute for Nuclear Physics), I. Lippi(Istituto Nazionale di Fisica Nucleare, Sezione di Padova), A. Lubashevskiy(Joint Institute for Nuclear Research), Б. Лубсандоржиев(Institute for Nuclear Research), G. Lutter(European Commission), C. Macolino(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), B. Majorovits(Max Planck Institute for Physics), W. Maneschg(Max Planck Institute for Nuclear Physics), M. Miloradovic(University of Zurich), R. Mingazheva(University of Zurich), M. Misiaszek(Jagiellonian University), P. Moseev(Institute for Nuclear Research), I. Nemchenok(Joint Institute for Nuclear Research), K. Panas(Jagiellonian University), L. Pandola(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud), K. Pelczar(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso), L. Pertoldi(University of Padua), A. Pullia(University of Milan), C. Ransom(University of Zurich), S. Riboldi(University of Milan), N. Rumyantseva(Kurchatov Institute), C. Sada(University of Padua), F. Salamida(University of L'Aquila), C. Schmitt(University of Tübingen), B. Schneider(Technische Universität Dresden), S. Schönert(Excellence Cluster Universe), A.-K. Schütz(University of Tübingen), O. Schulz(Max Planck Institute for Physics), B. Schwingenheuer(Max Planck Institute for Nuclear Physics), O. Selivanenko(Institute for Nuclear Research), E. Shevchik(Joint Institute for Nuclear Research), M. Shirchenko(Joint Institute for Nuclear Research), H. Simgen(Max Planck Institute for Nuclear Physics), A. Smolnikov(Joint Institute for Nuclear Research), L. Stančo(Istituto Nazionale di Fisica Nucleare, Sezione di Padova), L. Vanhoefer(Max Planck Institute for Physics), A. A. Vasenko(Kurchatov Institute), A. Veresnikova(Institute for Nuclear Research), K. von Sturm(University of Padua), V. Wagner(Max Planck Institute for Nuclear Physics), A. Wegmann(Max Planck Institute for Nuclear Physics), T. Wester(Technische Universität Dresden), Christoph Wiesinger(Excellence Cluster Universe), M. Wójcik(Jagiellonian University), E. Yanovich(Institute for Nuclear Research), I. Zhitnikov(Joint Institute for Nuclear Research), S. V. Zhukov(Kurchatov Institute), D. Zinatulina(Joint Institute for Nuclear Research), A. Zschocke(University of Tübingen), A. J. Zsigmond(Max Planck Institute for Physics), Κ. Zuber(Technische Universität Dresden), G. Zuzel(Jagiellonian University)

Physical Review Letters

March 26, 2018

10.1103/physrevlett.120.132503

Cited by 262Open Access

Full Text

Abstract

The GERDA experiment searches for the lepton-number-violating neutrinoless double-β decay of ^{76}Ge (^{76}Ge→^{76}Se+2e^{-}) operating bare Ge diodes with an enriched ^{76}Ge fraction in liquid argon. The exposure for broad-energy germanium type (BEGe) 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 1.0_{-0.4}^{+0.6}×10^{-3} counts/(keV kg yr) has been achieved; if normalized to the energy resolution this is the lowest ever achieved in any 0νββ experiment. No signal is observed and a new 90% C.L. lower limit for the half-life of 8.0×10^{25} yr is placed when combining with our previous data. The expected median sensitivity assuming no signal is 5.8×10^{25} yr.

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