Dark Matter and Beyond the Standard Model Searches with theMajorana Demonstrator

The Majorana Demonstrator experiment is an array of p-type, point-contact (PPC) Ge detectors searching for neutrinoless double-beta decay in Ge-76 operating in a low background shield at the Sanford Underground Research Facility. Additional searches beyond the Standard Model are enabled by the Majorana Demonstrator at low and high energy. The low energy program has pursued several exotic keV-scale physics searches in the 1-100 keV range, including lightly ionizing particles, bosonic dark matter (axionlike and dark photon), and solar axions. Currently, data cleaning analysis techniques have been finalized and the full low energy dataset has been unblinded, providing 38.4 kg-yr of exposure from enriched Ge-76 ultra-low background detectors. The finalized data cleaning and substantially larger exposure allows competitive improvements and new results of physics beyond the Standard Model. This talk presents improved limits on the bosonic dark matter, solar axion, and other physics topics such as electron decay. In addition, new searches for physics beyond the Standard Model are reported, including the first experimental limits on detection of fermionic dark matter and leading limits on spontaneous radiation from wavefunction collapse for certain models.