Search for Beyond Standard Model Rare Events with the Majorana Demonstrator

ORAL

Abstract

The \textsc{Majorana Demonstrator} is conducting a search for rare events from beyond-Standard Model physics in its low-energy region of 1--100 keV in parallel with its search for neutrinoless double beta decay. The first result used 1.3 kg-y of commissioning data to search for bosonic dark matter, solar axions, and other rare events. Since that time, up to $\sim$50 kg-y of exposure has been collected and is being analyzed. We have significantly improved the pulse shape analysis, data cleaning, and energy threshold evaluation to achieve an analysis energy threshold of $\sim$1 keV. The resulting energy spectra are used to conduct a search for rare peaks above background in the enriched and natural Ge detectors. In this work, we present our latest results from this updated search for bosonic dark matter and solar axions.

Authors

  • Clint Wiseman

    University of Washington

  • Inwook Kim

    Los Alamos National Laboratory

  • José Mariano López-Castaño

    Oak Ridge National Lab, Oak Ridge National Laboratory