Indirect detection of boosted light scalar dark matter
Abstract
We explore the possibilities of detecting MeV-scale boosted dark matter (DM) via astrophysical observations. Given a particular model framework, using gamma-ray data from COMPTEL and EGRET, as well as neutrino constraints from the Super-Kamiokande, Hyper-Kamiokande, JUNO, diffuse supernova neutrino background (DSNB), and atmospheric neutrino observations, we find that boosted light scalar DM could be probed within the mass range of 20\!-\!80 MeV, satisfying the Planck observed relic abundance. Our study shows, indirect search can play a key role in the detection of MeV-scale boosted DM, which are otherwise beyond the reach of usual collider or DM scattering experiments.
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