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arxiv: 1709.01980 · v1 · pith:GSDGBXYUnew · submitted 2017-09-06 · ⚛️ physics.ins-det · hep-ex· nucl-ex

The Large Enriched Germanium Experiment for Neutrinoless Double Beta Decay (LEGEND)

LEGEND Collaboration: N. Abgrall , A. Abramov , N. Abrosimov , I. Abt , M. Agostini , M. Agartioglu , A. Ajjaq , S.I. Alvis
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F.T. Avignone III 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. Cederk\"all 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. Hakenm\"ueller 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. Janicsk\'o Cs\'athy R. Janssens M. Je\v{s}kovsk\'y J. Jochum H.T. Johansson D. Judson M. Junker J. Kaizer K. Kang V. Kazalov Y.Kerma\"idic F. Kiessling A. Kirsch A. Kish A. Klimenko K.T. K.T.Kn\"opfle O. Kochetov S.I. Konovalov I. Kontul V.N. Kornoukhov T. Kraetzschmar K. Kr\"oninger 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. Sch\"onert A.-K. Sch\"utz 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
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classification ⚛️ physics.ins-det hep-exnucl-ex
keywords betaexperimentmajoranaregionbackgroundscdotcollaborationdecay
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The observation of neutrinoless double-beta decay (0${\nu}{\beta}{\beta}$) would show that lepton number is violated, reveal that neutrinos 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 $\sim$0.1 count /(FWHM$\cdot$t$\cdot$yr) in the region of the signal. The current generation $^{76}$Ge 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 0${\nu}{\beta}{\beta}$ signal region of all 0${\nu}{\beta}{\beta}$ experiments. Building on this success, the LEGEND collaboration has been formed to pursue a tonne-scale $^{76}$Ge experiment. The collaboration aims to develop a phased 0${\nu}{\beta}{\beta}$ experimental program with discovery potential at a half-life approaching or at $10^{28}$ years, using existing resources as appropriate to expedite physics results.

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