Constraints on dark matter with future MeV gamma-ray telescopes

Abstract

A number of new balloon or space-based $\gamma$-ray observatories have been proposed to close a "MeV gap" in sensitivity to $\gamma$ rays in the MeV-GeV energy band. One aspect of the science case for these instruments is their ability to constrain or discover decaying or annihilating dark matter. In this work, we forecast the sensitivity of these instruments for dark matter annihilation or decay for a range of possible Standard Model final states and compare to existing bounds.

12 pages plus 2 appendices, 10 figures, comments welcome. v2 fixes a plotting error in v1 and adds an estimate of atmospheric backgrounds, and v3 is the journal version

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Cited by in corpus (8)

• Prospects of future MeV telescopes in probing weak-scale Dark Matter
• Light dark-matter window constrained by \boldmath$K^{+}\to {\pi }^{+}$$+$$/E$
• Exploring sub-GeV Dark Matter Physics with Cosmic Ray and Future Telescopes
• Strong Constraints on Dark Photon and Scalar Dark Matter Decay from INTEGRAL and AMS-02 data
• Indirect searches for realistic sub-GeV Dark Matter models
• Decaying scalar dark matter in the minimal left-right symmetric model
• INTEGRAL, eROSITA and Voyager Constraints on Light Bosonic Dark Matter: ALPs, Dark Photons, Scalars, $B-L$ and $L_i-L_j$ Vectors
• Constraining light dark matter in vector-scalar portals with COSI and AMEGO-X