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Dark matter and lepton flavour phenomenology in a singlet-doublet scotogenic model
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We study the dark matter phenomenology of scotogenic frameworks through a rather illustrative model extending the Standard Model by scalar and fermionic singlets and doublets. Such a setup is phenomenologically attractive since it provides the radiative generation of neutrino masses, while also including viable candidates for cold dark matter. We employ a Markov Chain Monte Carlo algorithm to explore the associated parameter space in view of numerous constraints stemming from the Higgs mass, the neutrino sector, dark matter, and lepton-flavour violating processes. After a general discussion of the results, we focus on the case of fermionic dark matter, which remains rather uncovered in the literature so far. We discuss the associated phenomenology and show that in this particular case a rather specific mass spectrum is expected with fermion masses just above 1 TeV. Our study may serve as a guideline for future collider studies.
Forward citations
Cited by 5 Pith papers
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Dark matter in composite Higgs models with a scotogenic EFT
In the SU(6)/Sp(6) composite Higgs model with a scotogenic Z2, three of four neutral pseudo-Goldstone dark matter candidates can reproduce the observed relic density, while the SU(2)L triplet candidate fails; spin-1 r...
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Revisiting cLFV in "T1-2-A" scotogenic models: asymmetries in three-body lepton decays
A scotogenic model variant predicts observable charged-lepton-flavor-violating decay rates and measurable T/P asymmetries at future experiments, with tau-to-3mu asymmetries offering a falsification handle.
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Feasibility to probe the dynamical scotogenic model at the LHC
In the dynamical scotogenic model, Drell-Yan production of fermionic dark matter could be probed at the HL-LHC for masses 100-220 GeV; scalar DM and VBF channels are unlikely to be observable.
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Flavour and precision probes of a class of scotogenic models
Full next-to-leading-order corrections to leptonic Z and Higgs decays are derived for the T1-2-A scotogenic model, and the resulting cLFV and electroweak observables are scanned to identify future collider probes.
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Lepton flavor violation in the Majorana and Dirac scotogenic models
In the Majorana and Dirac scotogenic models, the 3-body tau decay τ→3μ can reach branching ratios of about 10^-10 and 10^-11 respectively, after muon constraints and perturbativity are imposed.
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