Axion dark matter searches above 1 μeV

Abstract

The particle nature of dark matter is an outstanding mystery at the intersection of particle physics and cosmology. The axion, originally proposed to explain a purely particle physics problem, is one of the most compelling candidates for dark matter. In the last decade, the field of axion searches has undergone a renaissance of new ideas and improvements to experimental sensitivities. I give a brief overview of the field of dark matter axion searches that target masses above 1 μeV with a focus on the axion haloscope technique, which is currently being used to explore some of the best-motivated axion dark matter parameter space.