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Paper   IPM / Particles / 15241
School of Particles and Accelerator
  Title:   A minimal model for two-component FIMP dark matter: a basic search
  Author(s): 
1.  Seyed Peyman Zakeri
2.  Seyed Mohammad Moosavi Nejad
3.  Mohammadreza Zakeri
4.  Seyed Yaser Ayazi
  Status:   Published
  Journal: Chinese Physics C
  No.:  073101
  Vol.:  42
  Year:  2018
  Supported by:  IPM
  Abstract:
In the multi-component configurations of dark matter phenomenology, we propose a minimal two-component configuration which is an extension of the Standard Model with only three new fields; one scalar and one fermion interact with the thermal soup through Higgs portal, mediated by the other scalar in such a way that the stabilities of dark matter candidates are made simultaneously by an explicit Z2 symmetry. Against the most common freeze-out framework, we look for dark matter particle signatures in the freeze-in scenario by evaluating the relic density and detection signals. A simple distinguishing feature of the model is the lack of dark matter conversion, so the dark matter components act individually and the model can be adapted entirely to both singlet scalar and singlet fermionic models, separately. We find dark matter self-interaction as the most promising approach to probe such feeble models. Although the scalar component satisfies this constraint, the fermionic one refuses it even in the resonant region.

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