Search Publications
Gamma-ray signals from multicomponent scalar dark matter decays
Ibarra, Alejandro; Ghosh, Avirup; Mondal, Tanmoy +1 more
Within a multicomponent dark matter scenario, novel gamma-ray signals may arise from the decay of the heavier dark matter component into the lighter. For a scalar dark sector of this kind, the decay phi2→phi1 γ is forbidden by the conservation of angular momentum, but the decay phi2 → phi1 γγ can have a …
Probing multicomponent FIMP scenarios with gamma-ray telescopes
Ibarra, Alejandro; Herms, Johannes
We consider a scenario where the dark sector includes two Feebly Interacting Massive Particles (FIMPs), with couplings to the Standard Model particles that allow their production in the Early Universe via thermal freeze-in. These couplings generically lead to the decay of the heavier dark matter component into the lighter, possibly leading to obse…