Suggested Measurements of Neutral-Kaon Decay Rates

A method which involves the use of $K$ mesons produced in both the $K^0$ state and the ${\overline{K}}^0$ state is proposed to measure the decay rates of the short-lived and long-lived components of neutral kaons. A phenomeno-logical analysis of these decay rates is carried out in the leptonic case, and a new test for $\mathrm{CPT}$ invariance is suggested.