Light mass window of inert doublet dark matter with lepton portal interaction
Light mass window of inert doublet dark matter with lepton portal interaction
We study phenomenology of a light scalar dark matter (DM). In the model, there is an inert doublet scalar and a singlet Dirac fermion $\ensuremath{\psi}$, both charged under a global ${Z}_{2}$ symmetry. The mass of the lightest inert scalar $H$ can be lighter than 10 GeV by imposing appropriate relations …