Search for CP-violation in K o→3 πo decay

Abstract

Using the 180 liter ITEP liquid xenon bubble chamber the time distribution of 22 K o → 3π o decays has been studied. For the ratio η ooo of amplitudes K S → 3π o and K L → 3π o decays we found Re η ooo = −0.04 ± 0.45 and Im η ooo = 0.45 ± 0.65 0.50. Assuming CPT invariance we obtained |η ooo| 2 < 1.2 and Γ(K S → 3π o)/ Γ(K S) ⩽ 4.3 × 10 −4 at 90% confidence level.