/ physics.ins-det arXiv:1708.07562


The Status and Initial Results of the MAJORANA DEMONSTRATOR Experiment


Guiseppe, V.E. (South Carolina U.) ; Abgrall, N. (LBNL, NSD) ; Alvis, S.I. (CENPA, Seattle) ; Arnquist, I.J. (PNL, Richland) ; Avignone, F.T., III (Oak Ridge) ; Barabash, A.S. (Kurchatov Inst., Moscow) ; Barton, C.J. (South Dakota U.) ; Bertrand, F.E. (Oak Ridge) ; Bode, T. (Munich, Max Planck Inst.) ; Bradley, A.W. (LBNL, NSD) ; Brudanin, V. (Dubna, JINR) ; Busch, M. (TUNL, Durham) ; Buuck, M. (CENPA, Seattle) ; Caldwell, T.S. (TUNL, Durham) ; Chan, Y-D. (LBNL, NSD) ; Christofferson, C.D. (South Dakota Sch. Mines Tech.) ; Chu, P.-H. (Los Alamos) ; Cuesta, C. (Madrid, CIEMAT) ; Detwiler, J.A. (CENPA, Seattle) ; Dunagan, C. (South Dakota Sch. Mines Tech.) ; Efremenko, Yu. (Oak Ridge) ; Ejiri, H. (Osaka U., Res. Ctr. Nucl. Phys.) ; Elliott, S.R. (Los Alamos) ; Gilliss, T. (TUNL, Durham) ; Giovanetti, G.K. (Princeton U.) ; Green, M.P. (Oak Ridge) ; Gruszko, J. (CENPA, Seattle) ; Guinn, I.S. (CENPA, Seattle) ; Haufe, C.R. (TUNL, Durham) ; Hehn, L. (LBNL, NSD) ; Henning, R. (TUNL, Durham) ; Hoppe, E.W. (PNL, Richland) ; Howe, M.A. (TUNL, Durham) ; Keeter, K.J. (Black Hills State U.) ; Kidd, M.F. (Tennessee Tech. U.) ; Konovalov, S.I. (Kurchatov Inst., Moscow) ; Kouzes, R.T. (PNL, Richland) ; Lopez, A.M. (Tennessee U.) ; Martin, R.D. (Queen's U., Kingston) ; Massarczyk, R. (Los Alamos) ; Meijer, S.J. (TUNL, Durham) ; Mertens, S. (Munich, Tech. U.) ; Myslik, J. (LBNL, NSD) ; O'Shaughnessy, C. (TUNL, Durham) ; Othman, G. (TUNL, Durham) ; Poon, A.W.P. (LBNL, NSD) ; Radford, D.C. (Oak Ridge) ; Rager, J. (TUNL, Durham) ; Reine, A.L. (TUNL, Durham) ; Rielage, K. (Los Alamos) ; Robertson, R.G.H. (CENPA, Seattle) ; Rouf, N.W. (CENPA, Seattle) ; Shanks, B. (TUNL, Durham) ; Shirchenko, M. (Dubna, JINR) ; Suriano, A.M. (South Dakota Sch. Mines Tech.) ; Tedeschi, D. (South Carolina U.) ; Trimble, J.E. (TUNL, Durham) ; Varner, R.L. (Oak Ridge) ; Vasilyev, S. (Dubna, JINR) ; Vetter, K. (LBNL, NSD) ; Vorren, K. (TUNL, Durham) ; White, B.R. (Los Alamos) ; Wilkerson, J.F. (Oak Ridge) ; Wiseman, C. (South Carolina U.) ; Xu, W. (South Dakota U.) ; Yakushev, E. (Dubna, JINR) ; Yu, C.-H. (Oak Ridge) ; Yumatov, V. (Kurchatov Inst., Moscow) ; Zhitnikov, I. (Dubna, JINR) ; Zhu, B.X. (Los Alamos)

Abstract: Neutrinoless double-beta decay searches play a major role in determining the nature of neutrinos, the existence of a lepton violating process, and the effective Majorana neutrino mass. The MAJORANA Collaboration assembled an array of high purity Ge detectors to search for neutrinoless double-beta decay in Ge-76. The MAJORANA DEMONSTRATOR is comprised of 44.1 kg (29.7 kg enriched in Ge-76) of Ge detectors divided between two modules contained in a low-background shield at the Sanford Underground Research Facility in Lead, South Dakota, USA. The initial goals of the DEMONSTRATOR are to establish the required background and scalability of a Ge-based next-generation ton-scale experiment. Following a commissioning run that started in 2015, the first detector module started low-background data production in early 2016. The second detector module was added in August 2016 to begin operation of the entire array. We discuss results of the initial physics runs, as well as the status and physics reach of the full MAJORANA DEMONSTRATOR experiment.

Web-Page: http://inspirehep.net/record/1620074/files/DS3andDS4_spectraHGCuts_EnrN170302_BW_bb.png; http://inspirehep.net/record/1620074/files/DS3andDS4_spectraHGtogether2_170302_BW_bb.png; http://inspirehep.net/record/1620074/files/DS0andDS1-LowE_BW_bb.png; http://inspirehep.net/record/1620074/files/arXiv:1708.07562.pdf


Note: *Brief entry*; *Temporary entry*; Proceedings of the MEDEX'17 meeting (Prague, May 29 - June 2, 2017)

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