Sandip Roy, Carlos Blanco, Christopher Dessert, Anirudh Prabhu, Tea Temim
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Abstract
The recently launched James Webb Space Telescope can resolve eV-scale emission lines arising from dark matter decay. We forecast the end-of-mission sensitivity to the decay of axions, a leading dark matter 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 0.18 to 2.6 eV with axion-photon couplings gaγγ≳5.5×10−12GeV−1. In particular, these results will constrain nucleophobic QCD axions to masses ≲0.2eV. Published by the American Physical Society2025
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