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Title: Recent Results from the Majorana Demonstrator

The MAJORANA Collaboration has completed construction and is now operating an array of high purity Ge detectors searching for neutrinoless double-beta decay ($$0\nu\beta\beta$$) in $$^{76}$$Ge. The array, known as the MAJORANA DEMONSTRATOR, is comprised of 44 kg of Ge detectors (30 kg enriched to 88% in $$^{76}$$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 $$0\nu\beta\beta$$ 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 $$^{76}$$Ge $$0\nu\beta\beta$$ LEGEND experiment.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [2] ;  [1] ;  [11] ;  [12] ;  [13] ;  [14] ;  [2] ;  [12] ;  [15] ;  [16] more »;  [13] ;  [17] ;  [18] ;  [19] ;  [2] ;  [20] ;  [1] ;  [11] ;  [1] ;  [3] ;  [1] ;  [21] ;  [22] ;  [5] ;  [3] ;  [23] ;  [24] ;  [13] ;  [1] ;  [25] ;  [11] ;  [26] ;  [1] ;  [2] ;  [11] ;  [7] ;  [1] ;  [1] ;  [13] ;  [2] ;  [2] ;  [7] ;  [9] ;  [12] ;  [20] ;  [7] ;  [9] ;  [27] ;  [1] ;  [13] ;  [28] ;  [20] ;  [6] ;  [9] ;  [7] ;  [5] ;  [9] ;  [13] « less
  1. Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States)
  2. Univ. of Washington, Seattle, WA (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Univ. of South Carolina, Columbia, SC (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. National Research Center “Kurchatov Institute” Institute for Theoretical and Experimental Physics, Moscow (Russia)
  6. Univ. of South Dakota, Vermillion, SD (United States)
  7. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  8. Max-Planck-Institut fur Physik, München (Germany)
  9. Joint Institute for Nuclear Research, Dubna (Russia)
  10. Triangle Univ. Nuclear Lab., Durham, NC (United States); Duke Univ., Durham, NC (United States)
  11. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  12. South Dakota School of Mines and Technology, Rapid City, SD (United States)
  13. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  14. Univ. of Washington, Seattle, WA (United States); CIEMAT, Madrid (Spain)
  15. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  16. Osaka Univ., Osaka (Japan)
  17. Princeton Univ., Princeton, NJ (United States)
  18. Triangle Univ. Nuclear Lab., Durham, NC (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); North Carolina State Univ., Raleigh, NC (United States)
  19. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  20. Univ. of South Carolina, Columbia, SC (United States)
  21. Black Hills State Univ., Spearfish, SD (United States)
  22. Tennessee Tech Univ., Cookeville, TN (United States)
  23. Univ. of Tennessee, Knoxville, TN (United States)
  24. Queen’s Univ., Kingston, ON (Canada)
  25. Max-Planck-Institut fur Physik, Munchen (Germany); Technische Univ., Munchen (Germany)
  26. Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Univ. of California, Berkeley, CA (United States)
  27. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  28. Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
International Journal of Modern Physics: Conference Series
Additional Journal Information:
Journal Volume: 46; Journal Issue: none; Journal ID: ISSN 2010-1945
Publisher:
World Scientific
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; neutrinoless double-beta decay; germanium; point-contact detectors
OSTI Identifier:
1460322