Search for the Sagittarius Tidal Stream of Axion Dark Matter around 4.55 $\mu$eV

TL;DR

This paper presents the first search for axion dark matter in the Sagittarius tidal stream around 4.55 μeV using haloscope data, setting new upper limits on axion density in that region.

Contribution

It introduces the first experimental search targeting the Sagittarius tidal stream of axion dark matter at this specific energy.

Findings

Excluded axion densities of $ ho_a extgreater0.184$ and $ extgreater0.025$ GeV/cm$^{3}$ for two models.

Set upper limits on axion density in the 4.51-4.59 μeV mass range.

First search of its kind for this specific tidal stream.

Abstract

We report the first search for the Sagittarius tidal stream of axion dark matter around 4.55 $\mu$eV using CAPP-12TB haloscope data acquired in March of 2022. Our result excluded the Sagittarius tidal stream of Dine-Fischler-Srednicki-Zhitnitskii and Kim-Shifman-Vainshtein-Zakharov axion dark matter densities of $\rho_a\gtrsim0.184$ and $\gtrsim0.025$ GeV/cm$^{3}$, respectively, over a mass range from 4.51 to 4.59 $\mu$eV at a 90% confidence level.