Journal Article
International Journal of Modern Physics: Conference Series, vol. 46, pp. 1860049, 2018
Authors
T Gilliss, S I Alvis, I J Arnquist, F T Avignone, A S Barabash, C J Barton, F E Bertrand, T Bode, V Brudanin, M Busch, M Buuck, T S Caldwell, Y-D Chan, C D Christofferson, P -H Chu, C Cuesta, J A Detwiler, C Dunagan, Yu Efremenko, H Ejiri, S R Elliott, G K Giovanetti, M P Green, J Gruszko, I S Guinn, V E Guiseppe, C R Haufe, L Hehn, R Henning, E W Hoppe, M A Howe, K J Keeter, M F Kidd, S I Konovalov, R T Kouzes, A M Lopez, R D Martin, R Massarczyk, S J Meijer, S Mertens, J Myslik, C O’Shaughnessy, G Othman, W Pettus, A W P Poon, D C Radford, J Rager, A L Reine, K Rielage, R G H Robertson, N W Ruof, B Shanks, M Shirchenko, A M Suriano, D Tedeschi, R L Varner, S Vasilyev, K Vetter, K Vorren, B R White, J F Wilkerson, C Wiseman, W Xu, E Yakushev, C -H Yu, V Yumatov, I Zhitnikov, B X Zhu
Abstract
The MAJORANA Collaboration has completed construction and is now operating an array of high purity Ge detectors searching for neutrinoless double-beta decay ([Formula: see text]) in [Formula: see text]Ge. The array, known as the MAJORANA DEMONSTRATOR, is comprised of 44 kg of Ge detectors (30 kg enriched to 88% in [Formula: see text]Ge) installed in an ultra-low background compact shield at the Sanford Underground Research Facility in Lead, South Dakota. The primary goal of the DEMONSTRATOR is to establish a low-background design that can be scaled to a next-generation tonne-scale experiment. This work reports initial background levels in the [Formula: see text] region of interest. Also presented are recent physics results leveraging P-type point-contact detectors with sub-keV energy thresholds to search for physics beyond the Standard Model; first results from searches for bosonic dark matter, solar axions, Pauli exclusion principle violation, and electron decay have been published. Finally, this work discusses the proposed tonne-scale [Formula: see text]Ge [Formula: see text] LEGEND experiment.
