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arXiv · 1210.2678

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.
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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).

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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.. 2012-10-09. The MAJORANA DEMONSTRATOR: Progress towards showing the feasibility of a tonne-scale 76Ge neutrinoless double-beta decay experiment. https://arxiv.org/abs/1210.2678

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