The low-energy program of the \sc {Majorana Demonstrator}

The {\sc Majorana} Collaboration constructed an ultra-low background, modular high-purity Ge detector array to search for neutrinoless double-beta decay in $^\mathrm{76}$Ge. Located at the 4850-ft level of the Sanford Underground Research Facility, the {\sc Demonstrator} detector assembly has the goal to show that it is possible to achieve background rates necessary for future ton-scale experiments. \\ The ultra-clean assembly in combination with low-noise p-type point contact detectors allows measurements with thresholds in the keV range. The talk will give an overview of the low-energy physics and recent achievements made since the completed {\sc Demonstrator} array started data taking in mid 2016. Recent results from campaign will be presented, including new limits on bosonic dark matter interaction rates. \\ This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, the Particle Astrophysics Program of the National Science Foundation, and the Sanford Underground Research Facility. We acknowledge the support of the U.S. Department of Energy through the LANL/LDRD Program.