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arXiv · 2308.09135

Phenomenological profile of scotogenic fermionic dark matter

Anirban Karan·Soumya Sadhukhan·José W. F. Valle
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Abstract

We consider the possibility that neutrino masses arise from the exchange of dark matter states. We examine in detail the phenomenology of fermionic dark matter in the singlet-triplet scotogenic reference model. We explore the case of singlet-like fermionic dark matter, taking into account all co-annihilation effects relevant for determining its relic abundance, such as fermion-fermion and scalar-fermion co-annihilation. Although this in principle allows for dark matter below 60 GeV, the latter is in conflict with charged lepton flavour violation (cLFV) and/or collider physics constraints. We examine the prospects for direct dark matter detection in upcoming experiments up to 10 TeV. Fermion-scalar coannihilation is needed to obtain viable fermionic dark matter in the 60-100 GeV mass range. Fermion-fermion and fermion-scalar coannihilation play complementary roles in different parameter regions above 100 GeV.

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Anirban Karan, Soumya Sadhukhan, José W. F. Valle. 2023-08-17. Phenomenological profile of scotogenic fermionic dark matter. https://doi.org/10.1007/jhep12(2023)185

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