Two component dark matter with multi-Higgs portals

Abstract

With the assistance of two extra groups, i.e., an extra hidden gauge group $SU(2{)}_D$ and a global $U(1)$ group, we propose a two component dark matter (DM) model. After the symmetry $SU(2{)}_D\times U(1)$ being broken, we obtain both the vector and scalar DM candidates. The two DM candidates communicate with the standard model (SM) via three Higgs as multi-Higgs portals. The three Higgs are mixing states of the SM Higgs, the Higgs of the hidden sector and real part of a supplement complex scalar singlet. We study relic density and direct detection of DM in three scenarios. The resonance behaviors and interplay between the two component DM candidates are represented through investigating of the relic density in the parameter spaces of the two DMs masses. The electroweak precision parameters constrains the two Higgs portals couplings (${\lambda }_m$ and ${\delta }_2$). The relevant vacuum stability and naturalness problem in the parameter space of ${\lambda }_m$ and ${\delta }_2$ are studied as well. The model could alleviate these two problems in some parameter spaces under the constraints of electroweak precision observables and Higgs indirect search.

27 pages, 16 figures. Version accepted for publication in JHEP

References in corpus (10)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Complex Singlet Extension of the Standard Model
• Singlet-Catalyzed Electroweak Phase Transitions and Precision Higgs Studies
• Higgs Self-Coupling as a Probe of Electroweak Phase Transition
• A minimal model for two-component dark matter
• What do precision Higgs measurements buy us?
• Higgs inflation with singlet scalar dark matter and right-handed neutrino in light of BICEP2
• Strategies for Probing Non-Minimal Dark Sectors at Colliders: The Interplay Between Cuts and Kinematic Distributions
• Dark matter in the hidden gauge theory
• Effects of a Real Singlet Scalar on Veltman Condition

Cited by in corpus (2)

• Nonthermal Two Component Dark Matter Model for Fermi-LAT $\gamma$-ray excess and 3.55 keV X-ray Line
• Isospin violating dark matter in Stückelberg portal scenarios