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RESEARCH PRODUCT
Sterile neutrino portal to Dark Matter II: exact dark symmetry
Veronica SanzNuria RiusMiguel Escuderosubject
Sterile neutrinoParticle physicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Physics and Astronomy (miscellaneous)Physics beyond the Standard ModelDark matterFOS: Physical scienceslcsh:AstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesStandard ModelHigh Energy Physics - Phenomenology (hep-ph)0103 physical scienceslcsh:QB460-466lcsh:Nuclear and particle physics. Atomic energy. Radioactivity010306 general physicsEngineering (miscellaneous)Physics010308 nuclear & particles physicsHigh Energy Physics::Phenomenology3. Good healthHigh Energy Physics - PhenomenologySeesaw mechanismHiggs bosonlcsh:QC770-798High Energy Physics::ExperimentNeutrinoLeptonAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
We analyze a simple extension of the Standard Model (SM) with a dark sector composed of a scalar and a fermion, both singlets under the SM gauge group but charged under a dark sector symmetry group. Sterile neutrinos, which are singlets under both groups, mediate the interactions between the dark sector and the SM particles, and generate masses for the active neutrinos via the seesaw mechanism. We explore the parameter space region where the observed Dark Matter relic abundance is determined by the annihilation into sterile neutrinos, both for fermion and scalar Dark Matter particles. The scalar Dark Matter case provides an interesting alternative to the usual Higgs portal scenario. We also study the constraints from direct Dark Matter searches and the prospects for indirect detection via sterile neutrino decays to leptons, which may be able to rule out Dark Matter masses below and around 100 GeV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-06-14 | European Physical Journal C |