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25 April 2024

» arxiv » 1210.2678

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The MAJORANA DEMONSTRATOR: Progress towards showing the feasibility of a tonne-scale 76Ge neutrinoless double-beta decay experiment
P. Finnerty ; E. Aguayo ; M. Amman ; F. T. Avignone. III ; A. S. Barabash ; P. J. Barton ; J. R. Beene ; F. E. Bertrand ; M. Boswell ; V. Brudanin ; M. Busch ; Y.-D. Chan ; C. D. Christofferson ; J. I. Collar ; D. C. Combs ; R. J. Cooper ; J. A. Detwiler ; P. J. Doe ; Yu. Efremenko ; V. Egorov ; H. Ejiri ; S. R. Elliott ; J. Esterline ; J. E. Fast ; N. Fields ; F. M. Fraenkle ; A. Galindo-Uribarri ; V. M. Gehman ; G. K. Giovanetti ; M. P. Green ; V. E. Guiseppe ; K. Gusey ; A. L. Hallin ; R. Hazama ; R. Henning ; E. W. Hoppe ; M. Horton ; S. Howard ; M. A. Howe ; R. A. Johnson ; K. J. Keeter ; M. F. Kidd ; A. Knecht ; O. Kochetov ; S. I. Konovalov ; R. T. Kouzes ; B. D. LaFerriere ; J. Leon ; L. E. Leviner ; J. C. Loach ; P. N. Luke ; S. MacMullin ; M. G. Marino ; R. D. Martin ; J. H. Merriman ; M. L. Miller ; L. Mizouni ; M. Nomachi ; J. L. Orrell ; N. R. Overman ; G. Perumpilly ; D. G. Phillips. II ; A. W. P. Poon ; D. C. Radford ; K. Rielage ; R. G. H. Robertson ; M. C. Ronquest ; A. G. Schubert ; T. Shima ; M. Shirchenko ; K. J. Snavely ; D. Steele ; J. Strain ; V. Timkin ; W. Tornow ; R. L. Varner ; K. Vetter ; K. Vorren ; J. F. Wilkerson ; E. Yakushev ; H. Yaver ; A. R. Young ; C-H. Yu. and. V. Yumatov. ;
Date:	9 Oct 2012
Abstract:	The MAJORANA DEMONSTRATOR will search for the neutrinoless double-beta decay of the 76Ge isotope with a mixed array of enriched and natural germanium detectors. The observation of this rare decay would indicate the neutrino is its own anti-particle, demonstrate that lepton number is not conserved, and provide information on the absolute mass-scale of the neutrino. The DEMONSTRATOR is being assembled at the 4850 foot level of the Sanford Underground Research Facility in Lead, South Dakota. The array will be contained in a low-background environment and surrounded by passive and active shielding. The goals for the DEMONSTRATOR are: demonstrating a background rate less than 3 t$^{-1}$ y$^{-1}$ in the 4 keV region of interest (ROI) surrounding the 2039 keV 76Ge endpoint energy; establishing the technology required to build a tonne-scale germanium based double-beta decay experiment; testing the recent claim of observation of neutrinoless double-beta decay [H. V. Klapdor-Kleingrothaus and I. V. Krivosheina, Mod. Phys. Lett. A21, 1547 (2006)]; and performing a direct search for light WIMPs (3-10 GeV).
Source:	arXiv, 1210.2678
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