Interaction Correction

I mentioned in my Chapter 2 posting that all elementary particle interactions are reversible. While true for almost all, there are a small set of interactions that are not reversible - they are asymmetric. In the early days of the universe (very shortly after the Big Bang) it is thought that the antisymmetric interactions lead to the current matter-anti-matter imbalance in our observed universe. These interactions exhibit CP (Charge Parity) Violation. Recent experiments at the Fermilab Tevatron accelerator have seen more positive muon-muon pairs than negative muons. While initially found many years ago as kaon particle decay, CP violations have all been of the same basic root cause and seemed unable to explain the imbalance of matter and anti-matter. The recent observation of di-muon charge asymmetry gives an additional pathway of CP Violations and may more fully explain the matter-antimatter imbalance.