First Results from an Axion Haloscope at CAPP around 10.7 μeV

The Center for Axion and Precision Physics Research at the Institute for Basic Science is searching for axion dark matter using ultralow temperature microwave resonators. We report the exclusion of the axion mass range 10.7126-10.7186 mu eV with near Kim-Shifman-Vainshtein-Zakharov (KSVZ) coupling sensitivity and the range 10.16-11.37 mu eV with about 9 times larger coupling at 90% confidence level. This is the first axion search result in these ranges. It is also the first with a resonator physical temperature of less than 40 mK.

Automated summary

The Center for Axion and Precision Physics Research at the Institute for Basic Science in South Korea is conducting a search for axion dark matter using ultralow temperature microwave resonators. They have reported the exclusion of specific axion mass ranges and larger coupling sensitivity in other ranges for the first time. This study is the first to achieve results with a resonator physical temperature below 40 mK.