Weakly interacting massive particles as dark matter

The weakly interacting massive particle (WIMP) is a good candidate for dark matter and commonly appears in the beyond standard model, though it has not yet been discovered experimentally. In this review article, we summarize the properties of dark-matter and examine the process of WIMP dark-matter production in the early Universe. Especially, the kinetic properties of the WIMP are closely connected to the small-scale structures in structure formation and evolve differently for adiabatic and isocurvature perturbations. We also review the production of super weakly interacting particles and some theoretical models for it. Finally, we briefly explain the WIMP detection experiments as direct detection, indirect detection, and particle accelerator experiments.