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arXiv · 1610.04613

Novel Spectral Features in MeV Gamma Rays from Dark Matter

Torsten Bringmann·Ahmad Galea·Andrzej Hryczuk·Christoph Weniger
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Abstract

Astrophysical searches for gamma rays are one of the main strategies to probe the annihilation or decay of dark matter particles. We present a new class of distinct sub-GeV spectral features that generically appear in kinematical situations where the available center-of-mass energy in such processes is just above threshold to produce excited meson states. Using a Fisher forecast with realistic astrophysical backgrounds, we demonstrate that for upcoming experiments like e-ASTROGAM and ComPair these signals can turn out to be the smoking gun in the search for particle dark matter.

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Torsten Bringmann, Ahmad Galea, Andrzej Hryczuk, Christoph Weniger. 2016-10-14. Novel Spectral Features in MeV Gamma Rays from Dark Matter. https://doi.org/10.1103/physrevd.95.043002

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