Baryon asymmetry is one of the problems mentioned in the list of unsolved physics problems and it refers to the fact that there is an imbalance in baryonic matter and antibaryonic matter in the observable universe. Or, in simple words, it means that we see mostly matter and basically no antimatter in our universe. This mystery cannot be explained by the standard model or general relativity, which currently makes it one of the biggest unsolved problems in cosmology & particle physics.
In this recent talk at the University of Lancaster Professor Roger Jones talks about this problem and how scientists try to solve it. In particular, Jones will discuss the work being done at the University of Lancaster and how new data from LHC might shine some light on this important problem. For more similar videos visit the Lancaster University YouTube channel.