Abstract
A new vector dark matter (DM) scenario in the context of the gauge-Higgs unification (GHU) is proposed. The DM particle is identified with an electric-charge neutral component in an $SU(2)_L$ doublet vector field with the same quantum number as the Standard Model Higgs doublet. Since such an $SU(2)_L$ doublet vector field is incorporated in any models of the GHU scenario, it is always a primary and model-independent candidate for the DM in the scenario. The observed relic density is reproduced through a DM pair annihilations into the weak gauge bosons with a TeV-scale DM mass, which is nothing but the compactification scale of extra-dimensions. Due to the higher-dimensional gauge structure of the GHU scenario, a pair of the DM particles has no direct coupling with a single $Z$-boson/Higgs boson, so that the DM particle evades the severe constraint from the current direct DM search experiments.
Highlights
The existence of the dark matter (DM) in our Universe is undoubtedly believed from various cosmological observations, and the DM particle is one of the key ingredients in exploring physics beyond the Standard Model (SM)
The DM particle is identified with an electric-charge neutral component in an SUð2ÞL doublet vector field with the same quantum number as the Standard Model Higgs doublet
Due to the higher-dimensional gauge structure of the gauge-Higgs unification (GHU) scenario, a pair of the DM particles has no direct coupling with a single Z-boson/Higgs boson, so that the DM particle evades the severe constraint from the current direct DM search experiments
Summary
The existence of the dark matter (DM) in our Universe is undoubtedly believed from various cosmological observations, and the DM particle is one of the key ingredients in exploring physics beyond the Standard Model (SM). SUð2ÞL doublet vector dark matter from gauge-Higgs unification A new vector dark matter (DM) scenario in the context of the gauge-Higgs unification (GHU) is proposed.
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