Lepton portal limit of inert Higgs doublet dark matter with radiative neutrino mass
Autor: | Debasish Borah, Soumya Sadhukhan, Shibananda Sahoo |
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Jazyk: | angličtina |
Rok vydání: | 2017 |
Předmět: |
Nuclear and High Energy Physics
Particle physics Physics beyond the Standard Model High Energy Physics::Lattice Dark matter FOS: Physical sciences 01 natural sciences Standard Model Nuclear physics symbols.namesake High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences 010306 general physics Physics 010308 nuclear & particles physics High Energy Physics::Phenomenology lcsh:QC1-999 Higgs field High Energy Physics - Phenomenology symbols Higgs boson High Energy Physics::Experiment Neutrino Higgs mechanism lcsh:Physics Lepton |
Zdroj: | Physics Letters B, Vol 771, Iss, Pp 624-632 (2017) Physics Letters |
ISSN: | 0370-2693 |
Popis: | We study an extension of the Inert Higgs Doublet Model (IHDM) by three copies of right handed neutrinos and heavy charged leptons such that both the inert Higgs doublet and the heavy fermions are odd under the $Z_2$ symmetry of the model. The neutrino masses are generated at one loop in the scotogenic fashion. Assuming the neutral scalar of the inert Higgs to be the dark matter candidate, we particularly look into the region of parameter space where dark matter relic abundance is primarily governed by the inert Higgs coupling with the leptons. This corresponds to tiny Higgs portal coupling of dark matter as well as large mass splitting within different components of the inert Higgs doublet suppressing the coannihilations. Such lepton portal couplings can still produce the correct relic abundance even if the Higgs portal couplings are arbitrarily small. Such tiny Higgs portal couplings may be responsible for suppressed dark matter nucleon cross section as well as tiny invisible branching ratio of the standard model Higgs, to be probed at ongoing and future experiments. We also briefly discuss the collider implications of such a scenario. 10 pages, 7 figures |
Databáze: | OpenAIRE |
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