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Search for Low Energy Beyond Standard Model Rare Events with the Majorana Demonstrator

ORAL

Abstract

The Majorana Demonstrator searches for rare events from beyond Standard Model physics in the energy region of 1--100 keV in parallel with its search for neutrinoless double beta decay, with an array of HPGe detectors enriched in 76Ge. Since the first release of low-energy results with 1.3 kg-y of commissioning data, the Demonstrator has collected roughly 50 kg-y of exposure. Many technical improvements to the low energy analysis have been implemented, including pulse shape discrimination, data cleaning, and improved energy threshold estimation. This improved noise event rejection allows searches for peak-like and extended signals from rare events such as bosonic dark matter, wavefunction collapse, solar axions, and more. In this talk we present our latest results for the BSM physics search of the Majorana Demonstrator.

Presenters

  • Clint Wiseman

    University of Washington

Authors

  • Clint Wiseman

    University of Washington

  • In Wook Kim

    Los Alamos National Laboratory