English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present a detailed study of a combined singlet-doublet fermion and tripletscalar model for dark matter. These models have only been studied separately inthe past. Together, they form a simple extension of the Standard Model that canaccount for dark matter and explain the existence of neutrino masses, which aregenerated radiatively. This holds even if singlet-doublet fermions and tripletscalars never contribute simultaneously to the dark matter abundance. However,this also implies the existence of lepton flavour violating processes. Inaddition, this particular model allows for gauge coupling unification. The newfields are odd under a new $\mathbb{Z}_2$ symmetry to stabilise the dark mattercandidate. We analyse the dark matter, neutrino mass and lepton flavourviolation aspects both separately and in conjunction, exploring the viableparameter space of the model. This is done using a numerical random scanimposing successively the neutrino mass and mixing, relic density, Higgs mass,direct detection, collider and lepton flavour violation constraints. We findthat dark matter in this model is fermionic for masses below about 1 TeV andscalar above. The narrow mass regions found previously for the two separatemodels are enlarged by their coupling. While coannihilations of the weakisospin partners are sizeable, this is not the case for fermions and scalarsdespite their often similar masses due to the relatively small coupling of thetwo sectors, imposed by the small neutrino masses. We observe a high degree ofcomplementarity between direct detection and lepton flavour violationexperiments, which should soon allow to fully probe the fermionic dark mattersector and at least partially the scalar dark matter sector.

Singlet-doublet fermion and triplet scalar dark matter with radiative neutrino masses