VIOLATION OF CPT AND QUANTUM-MECHANICS IN THE K-0-(K)OVER-BAR-0 SYSTEM

We reconsider the model of quantum mechanics violation in the K-0-($) over bar K-0 system, due to Ellis, Hagelin, Nanopoulos, and Srednicki, in which CP- and CPT-violating signatures arise from the evolution of pure states into mixed states. We present a formalism for computing t ime-dependent asymmetries in this model and show that present data con strains its parameters significantly. In the future, this model will b e put to very stringent tests at a phi-factory. We present the theory of these tests and show the relation between particular phi-decay corr elations and the parameters of quantum mechanics violation.