Sensitivity of JWST to eV-Scale Decaying Axion Dark Matter
arXiv:2311.04987
Abstract
The recently-launched James Webb Space Telescope (JWST) can resolve eV-scale emission lines arising from dark matter (DM) decay. We forecast the end-of-mission sensitivity to the decay of axions, a leading DM candidate, in the Milky Way using the blank-sky observations expected during standard operations. Searching for unassociated emission lines will constrain axions in the mass range eV to eV with axion-photon couplings GeV. In particular, these results will constrain astrophobic QCD axions to masses 0.2 eV.
7 pages, 2 figures, 4 pages of Supplemental Material (6 figures)