/ physics.ins-det arXiv:1711.03177

Spectral analysis for the Majorana Demonstrator experiment

Hehn, L (LBNL, NSD) ; Abgrall, N (LBNL, NSD) ; Alvis, S I (CENPA, Seattle) ; Arnquist, I J (PNL, Richland) ; III, F T Avignone (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 (CENPA, Seattle) ; 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) ; Guiseppe, V E (South Carolina U.) ; Haufe, C R (TUNL, Durham) ; 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) ; Pettus, W (CENPA, Seattle) ; 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) ; Ruof, 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: The MAJORANA DEMONSTRATOR is an experiment constructed to search for neutrinoless double-beta decays in germanium-76 and to demonstrate the feasibility to deploy a ton-scale experiment in a phased and modular fashion. It consists of two modular arrays of natural and $^{76}\textrm{Ge}$-enriched germanium detectors totaling 44.1 kg (29.7 kg enriched detectors), located at the 4850' level of the Sanford Underground Research Facility in Lead, South Dakota, USA. Data taken with this setup since summer 2015 at different construction stages of the experiment show a clear reduction of the observed background index around the ROI for $0\nu\beta\beta$-decay search due to improvements in shielding. We discuss the statistical approaches to search for a $0\nu\beta\beta$-signal and derive the physics sensitivity for an expected exposure of $10\,\textrm{kg}{\cdot}\textrm{y}$ from enriched detectors using a profile likelihood based hypothesis test in combination with toy Monte Carlo data.

Web-Page: http://inspirehep.net/record/1635318/files/figure2.png; http://inspirehep.net/record/1635318/files/figure1.png; http://inspirehep.net/record/1635318/files/arXiv:1711.03177.pdf

Note: *Brief entry*; *Temporary entry*; 5 page, 2 figures, to appear in Proceedings of TAUP 2017 - XV International Conference on Topics in Astroparticle and Underground Physics, 24 - 28 July 2017, Sudbury, ON, Canada

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 Record created 2017-12-04, last modified 2017-12-04

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