Search for CP violation in the decay of neutral kaons to π+π−π0

Abstract

The time-dependent rate asymmetry of initial K0 and K0 decaying into π+π−π0 was measured in order to reveal the CP-violating amplitude of the KS → π+π−π0 decay. For the real and the imaginary parts of η+−0, we find Re(η+−0) = (6 ± 13stat. ± 1syst.) × 10−3 and Im(η+−0) = (−2 ± 18stat. ± 3syst.) × 10−3 which correspond to |η+−0| < 0.037 with CL.