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Résumé |
We study a minimal model for a light scalar dark matter (DM) with a mass of a few
GeV, requiring a light dark photon mediator to interact with the Standard Model
(SM) particles. We analyse the model by focusing on the p-wave Breit-Wigner
resonance for DM annihilation channels, considering the thermal relic abundance
condition that includes the early kinetic decoupling effect. The interactions of
the mediator can be constrained by various low-energy terrestrial probes such as
proton beam-dumps measuring rare meson decays or electron beam-dump experiments
measuring mediator decay into leptons. On the other hand, the interactions of the
DM are tested by indirect searches, which include the cosmic ray and gamma-ray
observations, and also by the low-mass direct detection experiments. We do a
systematic analysis involving the latest and future limits in each category of the
experiments/observations. |
