Testing CPT invariance by using C-even neutral-meson-antimeson correlated states

Abstract

We consider the decays of a correlated neutral-meson-antimeson state with C-parity +1. We show that there is CPT noninvariance in the mixing of the neutral mesons if, for any two decay modes f and g, the decay rate has a component R-A which is antisymmetric under the interchange of the decay times t(1) and t(2). In particular, one may cleanly extract the CPT-noninvariance parameter with the help of R-A by using opposite-sign dilepton events.