Violation of CPT and Quantum Mechanics in the K0--K0bar System

Abstract

We reconsider the model of quantum mechanics violation in the $\text{ko}$--$\text{kob}$ 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 time-dependent asymmetries in this model and show that present data constrains its parameters significantly. In the future, this model will be put to very stringent tests at a $\varphi$ factory. We present the theory of these tests and show the relation between particular $\varphi$ decay correlations and the parameters of quantum mechanics violation.

Comments: 50 pages, uses PHYZZX, one figure available on request. This revised version contains minor corrections, improved bounds on the parameters which measure violation of quantum mechanics, and a more complete set of formulae