Speaker
Yuji Omura
(Kindai University)
Description
We study phenomenology of a light scalar dark matter (DM). In the model, there are an inert doublet scalar and a singlet Dirac fermion ψ, 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 between three scalar quartic couplings. The lightest Z_2 odd particle is stable and DM. In this paper, focusing on the parameter space where H is lighter than ψ and is DM, we discuss DM physics related to relic density, direct detection, indirect detection, collider searches and other cosmological observations. We clarify differences from the case where ψ is instead DM, which has been focused on in the previous works.
Authors
Mr
Ryo Higuchi
(Kindai University)
Dr
Shohei Okawa
(KEK)
Dr
Syuhei Iguro
(Nagoya U.)
Yuji Omura
(Kindai University)
