LEGEND-1000 Preconceptual Design Report

LEGEND Collaboration,N. Abgrall,I. Abt,M. Agostini,A. Alexander,C. Andreoiu,G. R. Araujo,F. T. Avignone III, W. Bae,A. Bakalyarov,M. Balata,M. Bantel,I. Barabanov,A. S. Barabash,P. S. Barbeau, C. J. Barton,P. J. Barton,L. Baudis,C. Bauer,E. Bernieri,L. Bezrukov,K. H. Bhimani,V. Biancacci,E. Blalock,A. Bolozdynya, S. Borden,B. Bos,E. Bossio,A. Boston,V. Bothe,R. Bouabid,S. Boyd,R. Brugnera,N. Burlac,M. Busch,A. Caldwell,T. S. Caldwell,R. Carney,C. Cattadori, Y. -D. Chan,A. Chernogorov,C. D. Christofferson,P. -H. Chu,M. Clark,T. Cohen, D. Combs,T. Comellato,R. J. Cooper, I. A. Costa,V. D'Andrea,J. A. Detwiler,A. Di Giacinto,N. Di Marco,J. Dobson,A. Drobizhev,M. R. Durand,F. Edzards,Yu. Efremenko,S. R. Elliott,A. Engelhardt,L. Fajt, N. Faud,M. T. Febbraro,F. Ferella,D. E. Fields,F. Fischer,M. Fomina, H. Fox,J. Franchi,R. Gala,A. Galindo-Uribarri,A. Gangapshev,A. Garfagnini,A. Geraci,C. Gilbert,M. Gold,C. Gooch,K. P. Gradwohl,M. P. Green,G. F. Grinyer,A. Grobov,J. Gruszko,I. Guinn,V. E. Guiseppe,V. Gurentsov,Y. Gurov,K. Gusev, B. Hacket,F. Hagemann,J. Hakenmüeller,M. Haranczyk,L. Hauertmann,C. R. Haufe,C. Hayward,B. Heffron, F. Henkes,R. Henning,D. Hervas Aguilar,J. Hinton,R. Hodak, H. Hoffmann,W. Hofmann,A. Hostiuc,J. Huang,M. Hult,M. Ibrahim Mirza,J. Jochum, R. Jones,D. Judson,M. Junker,J. Kaizer,V. Kazalov,Y. Kermaïdic,H. Khushbakht,M. Kidd,T. Kihm,K. Kilgus,I. Kim,A. Klimenko,K. T. Knöpfle,O. Kochetov,S. I. Konovalov,I. Kontul, K. Kool,L. L. Kormos,V. N. Kornoukhov, M. Korosec,P. Krause,V. V. Kuzminov,J. M. López-Castaño,K. Lang,M. Laubenstein,E. León,B. Lehnert,A. Leonhardt,A. Li,M. Lindner,I. Lippi,X. Liu,J. Liu,D. Loomba,A. Lubashevskiy,B. Lubsandorzhiev,N. Lusardi,Y. Müller,M. Macko,C. Macolino,B. Majorovits,F. Mamedov,W. Maneschg,L. Manzanillas,G. Marshall,R. D. Martin,E. L. Martin,R. Massarczyk,D. Mei,S. J. Meijer,S. Mertens,M. Misiaszek,E. Mondragon,M. Morella,B. Morgan,T. Mroz,D. Muenstermann, C. J. Nave,I. Nemchenok,M. Neuberger,T. K. Oli,G. Orebi Gann,G. Othman,V. Palušova,R. Panth,L. Papp,L. S. Paudel,K. Pelczar, Perez,L. Pertoldi,W. Pettus,P. Piseri,A. W. P. Poon,P. Povinec,A. Pullia,D. C. Radford,Y. A. Ramachers,C. Ransom,L. Rauscher,M. Redchuk,A. L. Reine,S. Riboldi,K. Rielage,S. Rozov,E. Rukhadze,N. Rumyantseva,J. Runge,N. W. Ruof,R. Saakyan,S. Sailer, G. Salamanna,F. Salamida,D. J. Salvat,V. Sandukovsky,S. Schönert, A. Schültz,M. Schütt,D. C. Schaper,J. Schreiner,O. Schulz,M. Schuster,M. Schwarz,B. Schwingenheuer,O. Selivanenko, M. Shafiee,E. Shevchik,M. Shirchenko,Y. Shitov,H. Simgen,F. Simkovic, M. Skorokhvatov,M. Slavickova,K. Smolek,A. Smolnikov, J. A. Solomon, G. Song,K. Starosta,I. Stekl,M. Stommel,D. Stukov, R. R. Sumathi, D. A. Sweigart, K. Szczepaniec,L. Taffarello,D. Tagnani,R. Tayloe,D. Tedeschi,M. Turqueti,R. L. Varner,S. Vasilyev,A. Veresnikova,K. Vetter,C. Vignoli, C. Vogl,K. von Sturm,D. Waters, J. C. Waters,W. Wei,C. Wiesinger,J. F. Wilkerson,M. Willers,C. Wiseman,M. Wojcik,V. H. -S. Wu,W. Xu,E. Yakushev, T. Ye,C. -H. Yu,V. Yumatov, N. Zaretski,J. Zeman,I. Zhitnikov,D. Zinatulina, A. -K. Zschocke,A. J. Zsigmond,K. Zuber,G. Zuzel

arxiv

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摘要

We propose the construction of LEGEND-1000, the ton-scale Large Enriched Germanium Experiment for Neutrinoless ββ Decay. This international experiment is designed to answer one of the highest priority questions in fundamental physics. It consists of 1000 kg of Ge detectors enriched to more than 90 deep underground laboratory. By combining the lowest background levels with the best energy resolution in the field, LEGEND-1000 will perform a quasi-background-free search and can make an unambiguous discovery of neutrinoless double-beta decay with just a handful of counts at the decay Q value. The experiment is designed to probe this decay with a 99.7 sensitivity in the ^76Ge half-life of 1.3×10^28 years, corresponding to an effective Majorana mass upper limit in the range of 9-21 meV, to cover the inverted-ordering neutrino mass scale with 10 yr of live time.

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