Atomki anomaly and the Secluded Dark Sector

Understand

The Atomiki anomaly can be interpreted as a new light vector boson.

• If such a new particle exists, it could be a mediator between the Standard Model sector and the dark sector including the dark matter.
• We discussed some simple effective models with these particles.
• In the models, the secluded dark matter models are good candidates to satisfy the thermal relic abundance.