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Two Component Higgs-Portal Dark Matter
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abstract
In this paper, we construct two component dark matter model and revisit fine-tuning, unitarity and vacuum stability problem in this framework. Through Higgs-portal interactions, the additional scalar and vector singlet field can interact with the SM particles. The parameter space of the model are severely constraint by observed relic density and direct detection experiments. We found that, unlike the SM, the fine-tuning problem is relaxed due to the modified Veltman condition. The vacuum stability problem is addressed, the additional contributions from two DM singlets to the $\beta$ function make the Higgs quartic coupling $\lambda(\mu)$ be positive up to Planck scale in some parameter space.
Forward citations
Cited by 2 Pith papers
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Fermi-ball in a multicomponent dark matter framework and its gravitational wave signatures
In a two-component dark matter model, a first-order phase transition can produce Fermi-balls and gravitational waves, with Fermi-balls potentially contributing up to about 30% of the dark matter relic density.
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Prospecting bipartite Dark Matter through Gravitational Waves
A two-component dark matter model with an inert triplet scalar and a singlet fermion can explain the relic abundance while producing a strong electroweak phase transition and gravitational wave signals detectable by L...
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