The large enriched germanium experiment for neutrinoless double beta decay (LEGEND)

Summary, in English

The observation of neutrinoless double-beta decay (0νββ) would show that lepton number is violated, reveal that neu-trinos are Majorana particles, and provide information on neutrino mass. A discovery-capable experiment covering the inverted ordering region, with effective Majorana neutrino masses of 15 - 50 meV, will require a tonne-scale experiment with excellent energy resolution and extremely low backgrounds, at the level of ∼0.1 count /(FWHM·t·yr) in the region of the signal. The current generation ⁷⁶Ge experiments GERDA and the Majorana Demonstrator, utilizing high purity Germanium detectors with an intrinsic energy resolution of 0.12%, have achieved the lowest backgrounds by over an order of magnitude in the 0νββ signal region of all 0νββ experiments. Building on this success, the LEGEND collaboration has been formed to pursue a tonne-scale ⁷⁶Ge experiment. The collaboration aims to develop a phased 0νββ experimental program with discovery potential at a half-life approaching or at 10²⁸ years, using existing resources as appropriate to expedite physics results.

• Author: N. Abgrall; A. Abramov; N. Abrosimov; I. Abt; M. Agostini; M. Agartioglu; A. Ajjaq; S. I. Alvis; F. T. Avignone; X. Bai; M. Balata; I. Barabanov; A. S. Barabash; P. J. Barton; L. Baudis; L. Bezrukov; T. Bode; A. Bolozdynya; D. Borowicz; A. Boston; H. Boston; S. T.P. Boyd; R. Breier; V. Brudanin; R. Brugnera; M. Busch; M. Buuck; A. Caldwell; T. S. Caldwell; T. Camellato; M. Carpenter; C. Cattadori; J. Cederkäll; Y. D. Chan; S. Chen; A. Chernogorov; C. D. Christofferson; P. H. Chu; R. J. Cooper; C. Cuesta; E. V. Demidova; Z. Deng; M. Deniz; J. A. Detwiler; N. Di Marco; A. Domula; Q. Du; Yu Efremenko; V. Egorov; S. R. Elliott; D. Fields; F. Fischer; A. Galindo-Uribarri; A. Gangapshev; A. Garfagnini; T. Gilliss; M. Giordano; G. K. Giovanetti; M. Gold; P. Golubev; C. Gooch; P. Grabmayr; M. P. Green; J. Gruszko; I. S. Guinn; V. E. Guiseppe; V. Gurentsov; Y. Gurov; K. Gusev; J. Hakenmüeller; L. Harkness-Brennan; Z. R. Harvey; C. R. Haufe; L. Hauertmann; D. Heglund; L. Hehn; A. Heinz; R. Hiller; J. Hinton; R. Hodak; W. Hofmann; S. Howard; M. A. Howe; M. Hult; L. V. Inzhechik; J. Janicskó Csáthy; R. Janssens; M. Ješkovský; J. Jochum; H. T. Johansson; D. Judson; M. Junker; J. Kaizer; K. Kang; V. Kazalov; Y. Kermadic; F. Kiessling; A. Kirsch; A. Kish; A. Klimenko; K. T. Knöpfle; O. Kochetov; S. I. Konovalov; I. Kontul; V. N. Kornoukhov; T. Kraetzschmar; K. Kröninger; A. Kumar; V. V. Kuzminov; K. Lang; M. Laubenstein; A. Lazzaro; Y. L. Li; Y. Y. Li; H. B. Li; S. T. Lin; M. Lindner; I. Lippi; S. K. Liu; X. Liu; J. Liu; D. Loomba; A. Lubashevskiy; B. Lubsandorzhiev; G. Lutter; H. Ma; B. Majorovits; F. Mamedov; R. D. Martin; R. Massarczyk; J. A.J. Matthews; N. McFadden; D. M. Mei; H. Mei; S. J. Meijer; D. Mengoni; S. Mertens; W. Miller; M. Miloradovic; R. Mingazheva; M. Misiaszek; P. Moseev; J. Myslik; I. Nemchenok; T. Nilsson; P. Nolan; C. O'Shaughnessy; G. Othman; K. Panas; L. Pandola; L. Papp; K. Pelczar; D. Peterson; W. Pettus; A. W.P. Poon; P. P. Povinec; A. Pullia; X. C. Quintana; D. C. Radford; J. Rager; C. Ransom; F. Recchia; A. L. Reine; S. Riboldi; K. Rielage; S. Rozov; N. W. Rouf; E. Rukhadze; N. Rumyantseva; R. Saakyan; E. Sala; F. Salamida; V. Sandukovsky; G. Savard; S. Schönert; A. K. Schütz; O. Schulz; M. Schuster; B. Schwingenheuer; O. Selivanenko; B. Sevda; B. Shanks; E. Shevchik; M. Shirchenko; F. Simkovic; L. Singh; V. Singh; M. Skorokhvatov; K. Smolek; A. Smolnikov; A. Sonay; M. Spavorova; I. Stekl; D. Stukov; D. Tedeschi; J. Thompson; T. Van Wechel; R. L. Varner; A. A. Vasenko; S. Vasilyev; A. Veresnikova; K. Vetter; K. Von Sturm; K. Vorren; M. Wagner; G. J. Wang; D. Waters; W. Z. Wei; T. Wester; B. R. White; C. Wiesinger; J. F. Wilkerson; M. Willers; C. Wiseman; M. Wojcik; H. T. Wong; J. Wyenberg; W. Xu; E. Yakushev; G. Yang; C. H. Yu; Q. Yue; V. Yumatov; J. Zeman; Z. Zeng; I. Zhitnikov; B. Zhu; D. Zinatulina; A. Zschocke; A. J. Zsigmond; K. Zuber; G. Zuzel
• Department/s: Nuclear physics
• Publishing year: 2017-10-16
• Language: English
• Publication/Series: Workshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX 2017
• Volume: 1894
• Links: http://dx.doi.org/10.1063/1.5007652
• Document type: Conference paper
• Publisher: American Institute of Physics (AIP)
• Topic: Subatomic Physics
• Conference name: 11th Workshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX 2017
• Conference date: 2017-05-29 - 2017-06-02
• Conference place: Prague, Czech Republic
• Status: Published
• ISBN/ISSN/Other: ISBN: 9780735415775