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 phi_2→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…