Direct detection of freeze-in inelastic dark matter
Haipeng An, Daneng Yang
Abstract
We show that the current sensitivities of direct detection experiments have already reached the interesting parameter space of freeze-in dark matter models if the dark sector is in the inelastic dark matter framework and the excited dark matter state is cosmologically stable. Using results recently presented by the XENON1T experiment, we present constraints on these models. We also show that these models can explain the reported excess in the electron recoil signals if the mass gap between the ground state and the excited state is at keV scale.
Topics & Concepts
PhysicsDark matterRecoilExcited stateParameter spaceGround stateLight dark matterScalar field dark matterDark fluidWeakly interacting massive particlesHot dark matterParticle physicsWarm dark matterAstrophysicsAtomic physicsDark energyCosmologyMathematicsStatisticsDark Matter and Cosmic PhenomenaCosmology and Gravitation TheoriesParticle physics theoretical and experimental studies