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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,Jacek Bogumil Biernat,T. Bode,D. Borowicz,V. Brudanin,R. Brugnera,A. Caldwell,C. Cattadori,A. Chernogorov,T. Comellato,V. D’Andrea,É. 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. V. Kazalov,Y. Kermaïdic,T. Kihm,I.V. Kirpichnikov,A. Kirsch,A. Kish,A. Klimenko,R. Kneißl,K. T. Knöpfle,O. Kochetov,V. N. Kornoukhov,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,Christian Schmitt,Basil Schneider,S. Schönert,A.-K. Schütz,O. Schulz,B. Schwingenheuer,O. Selivanenko,Ye. Shevchik,M. Shirchenko,H. Simgen,A. Smolnikov,L. Stančo,L. Vanhoefer,A. A. Vasenko,A. Veresnikova,K. von Sturm,Victoria Wagner,A. Wegmann,T. Wester,Christoph Wiesinger,Marcin Wójcik,E. Yanovich,I. Zhitnikov,С. В. Жуков,D. Zinatulina,A. Zschocke,Anna Julia Zsigmond,Κ. Zuber,G. Zuzel

Physics

Lepton number

Double beta decay

2018

The GERDA experiment searches for the lepton-number-violating neutrinoless double-β decay of 76Ge (76Ge→76Se+2e−) operating bare Ge diodes with an enriched 76Ge 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+0.6−0.4×10−3 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 8.0×1025 yr is placed when combining with our previous data. The expected median sensitivity assuming no signal is 5.8×1025 yr.Received 17 November 2017Revised 23 January 2018DOI:https://doi.org/10.1103/PhysRevLett.120.132503© 2018 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasDouble beta decayNeutrinoless double beta decayNuclear structure & decaysPropertiesBaryon & lepton number symmetriesNuclear Physics

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“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” is a paper by M. Agostini A. M. Bakalyarov M. Balata И. Р. Барабанов L. Baudis C. Bauer E. Bellotti S. Belogurov A. Bettini L. Bezrukov Jacek Bogumil Biernat T. Bode D. Borowicz V. Brudanin R. Brugnera A. Caldwell C. Cattadori A. Chernogorov T. Comellato V. D’Andrea É. 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. V. Kazalov Y. Kermaïdic T. Kihm I.V. Kirpichnikov A. Kirsch A. Kish A. Klimenko R. Kneißl K. T. Knöpfle O. Kochetov V. N. Kornoukhov 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 Christian Schmitt Basil Schneider S. Schönert A.-K. Schütz O. Schulz B. Schwingenheuer O. Selivanenko Ye. Shevchik M. Shirchenko H. Simgen A. Smolnikov L. Stančo L. Vanhoefer A. A. Vasenko A. Veresnikova K. von Sturm Victoria Wagner A. Wegmann T. Wester Christoph Wiesinger Marcin Wójcik E. Yanovich I. Zhitnikov С. В. Жуков D. Zinatulina A. Zschocke Anna Julia Zsigmond Κ. Zuber G. Zuzel published in 2018. It has an Open Access status of “green”. You can read and download a PDF Full Text of this paper here.