Origin of the matter-antimatter asymmetry of the universe

Abstract

The origin of the matter-antimatter asymmetry of the universe has been a long unsolved problem in cosmology and particle physics. Although it is challenging to solve this problem, our understanding on it becomes deeper with the improvement of the theoretical and experimental study. Firstly, we introduce the backgrounds of the matter-antimatter asymmetry of the universe and show the three necessary conditions to solve the problem. Then, we review the current status of our understanding on this problem with emphasis on those scenarios which can be tested in the experiments, including the electroweak baryogenesis, leptogenesis and gravitational baryogenesis. We hope the experiments in future can unravel the true baryogenesis scenario, which can explain the matter-antimatter asymmetry of the universe.