Wan-Il Park

Higgs Portal Vector Dark Matter : Revisited

A bstractWe revisit the Higgs portal vector dark matter model including a hidden sector Higgs field that generates the mass of the vector dark matter. The model becomes renormalizable and has two scalar bosons, the mixtures of the standard model (SM) Higgs and the hidden sector Higgs bosons. The strong bound from direct detection such as XENON100 is evaded due to the cancellation mechanism between the contributions from two scalar bosons. As a result, the model becomes still viable in large range of dark matter mass, contrary to some claims in the literature. The Higgs properties are also affected, the signal strengths for the Higgs boson search being universally suppressed relative to the SM value, which could be tested at the LHC in the future.

Higgs portal vector dark matter for GeV scale -ray excess from galactic center

We show that the

Vacuum structure and stability of a singlet fermion dark matter model with a singlet scalar messenger

\mathinner{\mathrm{GeV}}

Fermi Gamma Ray Line at 130 GeV from Axion-Mediated Dark Matter

scale

Singlet Portal Extensions of the Standard Seesaw Models to a Dark Sector with Local Dark Symmetry

\gamma

Invisible Higgs Decay Width vs. Dark Matter Direct Detection Cross Section in Higgs Portal Dark Matter Models

-ray excess from the direction of the Galactic Center can be naturally explained by the pair annihilation of Abelian vector dark matter (VDM) into a pair of dark Higgs bosons

Axion-mediated dark matter and Higgs diphoton signal

VV \rightarrow \phi \phi

Cluster X-ray line at 3.5~\mathrm{keV} from axion-like dark matter

, followed by the subsequent decay of

Thermal inflation, baryogenesis and axions

\phi

Gamma-ray boxes from axion-mediated dark matter

into