Speaker
Yu Watanabe
(University of Tokyo)
Description
We study a minimal model for a light scalar dark matter, requiring a light
scalar mediator to address the core-cusp problem and interact with the standard
model particles. We analyze the model comprehensively by focusing on the
Breit-Wigner resonance for dark matter annihilation and self-scattering channels,
considering the thermal relic abundance condition that includes the early kinetic
decoupling effect, as well as the present and future constraints from collider, direct,
and indirect dark matter detections. We found that the scalar dark matter with the
mass of 0.3 - 2 GeV remains uncharted, which will be efficiently tested by the near
future MeV gamma-ray observations.
