T/E Testing Violation of CPT and Quantum Mechanics in the Ko-Ko System

I report a recent study’jmade in collaboration with M.E. Peskin, on the time dependence of a kaon beam propagating according to a generalization of quantum. mechanics due to Ellis, Hagelin, Nanopoulos and Srednicki, in which CP- and CPT-violating signatures arise from the evolution of pure states to mixed states. Constraints on the magnitude of its parameters are established on the basis of existing experimental data. New facilities such as 4 factories are shown to be particularly adequate to study this generalization from quantum mechanics and to disentangle its parameters from other CPT violating perturbations of the kaon z system