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The Majorana Demonstrator search for neutrinoless double beta decay

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arxiv 1608.07340 v2 pith:HM5FDPIU submitted 2016-08-25 physics.ins-det nucl-ex

The Majorana Demonstrator search for neutrinoless double beta decay

C. Cuesta , M. Buuck , J.A. Detwiler , J. Gruszko , I.S. Guinn , J. Leon , R.G.H. Robertson , N. Abgrall
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A.W. Bradley Y-D. Chan S. Mertens A.W.P. Poon K. Vetter I.J. Arnquist E.W. Hoppe R.T. Kouzes J.L. Orrell F.T. Avignone III A.S. Barabash S.I. Konovalov V. Yumatov F.E. Bertrand A. Galindo-Uribarri D.C. Radford R.L. Varner C.-H. Yu V. Brudanin M. Shirchenko S. Vasilyev E. Yakushev I. Zhitnikov M. Busch T.S. Caldwell T. Gilliss R. Henning M.A. Howe J. MacMullin S.J. Meijer C. O'Shaughnessy J. Rager B. Shanks J.E. Trimble K. Vorren W. Xu C.D. Christofferson C. Dunagan A.M. Suriano P.-H. Chu S.R. Elliott R. Massarczyk K. Rielage B.R. White Yu. Efremenko A.M. Lopez H. Ejiri A. Fullmer G.K. Giovanetti M.P. Green V.E. Guiseppe D. Tedeschi C. Wiseman B.R. Jasinski K.J. Keeter M.F. Kidd R.D. Martin E. Romero-Romero J.F. Wilkerson
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classification physics.ins-det nucl-ex
keywords demonstratormajoranabetadecaydoubleneutrinolessbackgroundge-76
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The MAJORANA Collaboration is constructing the MAJORANA DEMONSTRATOR, an ultra-low background, modular, HPGe detector array with a mass of 44.8-kg (29.7 kg enriched >88% in Ge-76) to search for neutrinoless double beta decay in Ge-76. The next generation of tonnescale Ge-based neutrinoless double beta decay searches will probe the neutrino mass scale in the inverted-hierarchy region. The MAJORANA DEMONSTRATOR is envisioned to demonstrate a path forward to achieve a background rate at or below 1 count/tonne/year in the 4 keV region of interest around the Q-value of 2039 keV. The MAJORANA DEMONSTRATOR follows a modular implementation to be easily scalable to the next generation experiment. First data taken with the DEMONSTRATOR are introduced here.

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