Searching for Light in the Darkness: Bounds on ALP Dark Matter with the optical MUSE-Faint survey
arXiv:2009.01310 · doi:10.1016/j.physletb.2021.136075
Abstract
We use MUSE spectroscopic observations of the dwarf spheroidal galaxy Leo T between 470 and 935 nm to search for radiative decays of axion like particles (ALPs). Under the assumption that ALPs constitute the dark matter component of the Leo T halo, we derive bounds on the effective ALP-two-photon coupling. We improve existing limits by more than one order of magnitude in the ALP mass range 2.7-5.3 eV.
11 pages, 5 figures. v2: minor revision, matching the version to appear in PLB