Final Results of GERDA on the Two-Neutrino Double- Decay Half-Life of 76Ge
M. Agostini,A. Alexander,G. R. Araujo,A. M. Bakalyarov,M. Balata,I. Barabanov,L. Baudis,C. Bauer,S. Belogurov,A. Bettini,L. Bezrukov,V. Biancacci,E. Bossio,V. Bothe,R. Brugnera,A. Caldwell,S. Calgaro,C. Cattadori,A. Chernogorov,P. -J. Chiu,T. Comellato,V. D'Andrea,E. V. Demidova,A. Di Giacinto,N. Di Marco,E. Doroshkevich,F. Fischer,M. Fomina,A. Gangapshev,A. Garfagnini,C. Gooch,P. Grabmayr,V. Gurentsov,K. Gusev,S. Hackenmueller,S. Hemmer,W. Hofmann,J. Huang,M. Hult,L. V. Inzhechik,J. Janicsko Csathy,J. Jochum,M. Junker,V. Kazalov,Y. Kermaidic,H. Khushbakht,T. Kihm,K. Kilgus,I. V. Kirpichnikov,A. Klimenko,K. T. Knoepfle,O. Kochetov,V. N. Kornoukhov,P. Krause,V. V. Kuzminov,M. Laubenstein,B. Lehnert,M. Lindner,I. Lippi,A. Lubashevskiy,B. Lubsandorzhiev,G. Lutter,C. Macolino,B. Majorovits,W. Maneschg,L. Manzanillas,G. Marshall,M. Miloradovic,R. Mingazheva,M. Misiaszek,M. Morella,Y. Meuller,I. Nemchenok,M. Neuberger,L. Pandola,K. Pelczar,L. Pertoldi,P. Piseri,A. Pullia,C. Ransom,L. Rauscher,M. Redchuk,S. Riboldi,N. Rumyantseva,C. Sada,S. Sailer,F. Salamida,S. Schoenert,J. Schreiner,M. Schuett,A. -K. Schuetz,O. Schulz,M. Schwarz,B. Schwingenheuer,O. Selivanenko,E. Shevchik,M. Shirchenko,L. Shtembari,H. Simgen,A. Smolnikov,D. Stukov,S. Sullivan,A. A. Vasenko,A. Veresnikova,C. Vignoli,K. von Sturm,T. Wester,C. Wiesinger,M. Wojcik,E. Yanovich,B. Zatschler,I. Zhitnikov,S. V. Zhukov,D. Zinatulina,A. Zschocke,A. J. Zsigmond,K. Zuber,G. Zuzel
PHYSICAL REVIEW LETTERS（2023）
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摘要
We present the measurement of the two-neutrino double-fl decay rate of 76Ge performed with the GERDA Phase II experiment. With a subset of the entire GERDA exposure, 11.8 kg yr, the half-life of the process has been determined: T2 nu 1/2 1/4 o2.022 +/- 0.018stat +/- 0.038syst thorn x 1021 yr. This is the most precise determination of the 76Ge two-neutrino double-beta decay half-life and one of the most precise measurements of a double-beta decay process. The relevant nuclear matrix element can be extracted: M2 nu eff = (0.101 +/- 0.001).
