Constraints on light decaying dark matter candidates from 16 years of INTEGRAL/SPI observations
Abstract
We apply the recently developed analysis of 16 years of INTEGRAL/SPI data including a dark matter spatial template to derive bounds on dark matter candidates lighter than WIMPs (like sterile neutrinos or axion-like particles) decaying into line or continuum electromagnetic final state channels. The bounds obtained are the strongest to date for dark matter masses between 60 keV and 16 MeV experiencing two-body decays producing photon lines.
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