Minimal Decaying Dark Matter and the LHC

Abstract

We consider a minimal Dark Matter model with just two additional states, a Dark Matter Majorana fermion and a colored or electroweakly charged scalar, without introducing any symmetry to stabilize the DM state. We identify the parameter region where an indirect DM signal would be within the reach of future observations and the DM relic density generated fits the observations. We find in this way two possible regions in the parameter space, corresponding to a FIMP/SuperWIMP or a WIMP DM. We point out the different collider signals of this scenario and how it will be possible to measure the different couplings in case of a combined detection.

33 pages, 13 figures

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• Effective Theory of Freeze-in Dark Matter
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• Calculation of Momentum Distribution Function of a Non-thermal Fermionic Dark Matter
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• 3.55 keV line in Minimal Decaying Dark Matter scenarios
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