Exact Theorems Concerning CP and CPT Violations in C=-1 Entangled State   of Pseudoscalar Neutral Mesons
  Neutral pseudoscalar mesons in an entangled or Einstein-Podolsky-Rosen state are routinely produced in phi and B factories. Based on the peculiar properties of an entangled state, we present some general exact theorems about parameters characterizing CP and CPT violations, by using various asymmetries defined for the correlated decays of the two entangled mesons, which are rigorously calculated. 
Yu Shi
hep-ph