Kavli Affiliate: Shigeki Matsumoto
| First 5 Authors: Tobias Binder, Sreemanti Chakraborti, Shigeki Matsumoto, Yu Watanabe,
| Summary:
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.
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