Measurement of the Branching Ratio of theCP-Violating Decay ModeKL02π0

Abstract
The branching ratio Γ(KL02π0)Γ(KL03π0) has been measured directly, using a heavy-liquid bubble chamber, and found to be (3.2±1.5)×103, from which |η00|=(1.9±0.5)×103.