POLE APPROXIMATION FOR DECAYS OF NEUTRAL K-MESONS

A description of the K0-K0BAR system without the use of the Weisskopf-Wigner approximation is discussed. Without any assumptions regarding the structure of the Hamiltonian, it is shown that an exponential time dependence is associated with two combinations, K(S) and K(L). If there is CP violation, the structure of K(S) and K(L) contains an apparent violation of CPT invariance.