摘要
Why is the current universe dominated by matter when there should have been equal amounts of matter and anti-matter at the beginning?One of the keys to answering this question is to find out a currently undiscovered charge-parity(CP)violation in the lepton sector.The CP violation can be tested through studies of the phenomenon called neutrino oscillation.Neutrino oscillation occurs because the weak eigenstates,jnl>el=e;m;tT;and mass eigenstates,jni>ei=1;2;3T,aremixed,as follows.
