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arXiv · 2311.04987

Sensitivity of JWST to eV-Scale Decaying Axion Dark Matter

Sandip Roy·Carlos Blanco·Christopher Dessert·Anirudh Prabhu·Tea Temim
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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 $0.18$ eV to $2.6$ eV with axion-photon couplings $g_{a\gamma\gamma}\gtrsim 5.5 \times 10^{-12}$ GeV$^{-1}$. In particular, these results will constrain astrophobic QCD axions to masses $\lesssim$ 0.2 eV.

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Sandip Roy, Carlos Blanco, Christopher Dessert, Anirudh Prabhu, Tea Temim. 2023-11-08. Sensitivity of JWST to eV-Scale Decaying Axion Dark Matter. https://arxiv.org/abs/2311.04987

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