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Sensitivity of JWST to eV-Scale Decaying Axion Dark Matter

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arxiv 2311.04987 v1 pith:QIBP6F4T submitted 2023-11-08 hep-ph astro-ph.GA

Sandip Roy , Carlos Blanco , Christopher Dessert , Anirudh Prabhu , Tea Temim This is my paper · ORCID
classification hep-phastro-ph.GA
keywords axionsconstraindarkdecayemissionev-scalegammajwst
verification ladder T0 review T1 audit T2 compute T3 formal
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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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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Search for Dark Matter Annihilation and Decay with H$\alpha$ Line Emission

    hep-ph 2025-12 conditional novelty 7.0 of 10

    H-alpha line emission from recombining gas in quiet dwarf galaxies is a new probe of dark matter annihilation/decay, giving leading limits for some dark matter masses.

  2. Dark Matter Haloscope with a Disordered Dielectric Absorber

    hep-ph 2025-05 conditional novelty 7.0 of 10

    A disordered dielectric powder can act as a broadband dark-matter-to-photon conversion target, and the proposed DPHaSE experiment could probe QCD axions and dark photons in the 10 meV to 1 eV range.

  3. Searching for Axion Dark Matter Near Relaxing Magnetars

    hep-ph 2025-05 conditional novelty 6.0 of 10

    Resonant axion-to-photon conversion near magnetars could be observable with ALMA and SKA, but the predicted line strength and frequency depend heavily on which plasma model is correct.

  4. Neutrino lines and photon continua from cascade dark matter decay

    hep-ph 2026-07 conditional novelty 5.0 of 10

    In cascade dark-matter decay, neutrino-line searches can beat gamma-ray limits whenever the intermediate mediator is long-lived enough to suppress the photon flux.

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