On Minimal Dark Matter coupled to the Higgs

Abstract

We provide a unified presentation of extensions of the Minimal Dark Matter framework in which new fermionic electroweak multiplets are coupled to each other via the Standard Model Higgs doublet. We study systematically the generic features of all the possibilities, starting with a singlet and two doublets (akin to Bino-Higgsino dark matter) up to a Majorana quintuplet coupled to two Weyl quadruplets. We pay special attention to this last case, since it has not yet been discussed in the literature. We estimate the parameter space for viable dark matter candidates. This includes an estimate for the mass of a quasi-pure quadruplet dark matter candidate taking into account the Sommerfeld effect. We also argue how the coupling to the Higgs can bring the Minimal Dark Matter scenario within the reach of present and future direct detection experiments.

40 pages, 17 figures

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• Pseudo Nambu-Goldstone Dark Matter: Examples of Vanishing Direct Detection Cross Section
• Higgs-mediated bound states in dark-matter models
• Probing Dark Matter with Disappearing Tracks at the LHC
• Long live the Higgs portal!
• Dark matter bound state formation via emission of a charged scalar
• Phenomenology of doublet-triplet fermionic dark matter in nonstandard cosmology and multicomponent dark sectors
• Electroweak dark matter model accounting for the CDF $W$-mass anomaly
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• Next-to-minimal dark matter at the LHC
• Warm inflation with a heavy QCD axion
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• Minimal Consistent Dark Matter models for systematic experimental characterisation: Fermion Dark Matter
• A Closer Look at CP-Violating Higgs Portal Dark Matter as a Candidate for the GCE
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• The Higgs-portal for Dark Matter:effective field theories versus concrete realizations
• Barr-Zee Diagrams at a High-Energy Muon Collider
• Gauge hierarchy and metastability from Higgs-driven crunching
• Unitarity violation and restoration in radiative bound-state formation