A test of CPT symmetry in K0 vs K̄0 → π+π−π0 decays

Abstract

I show that the CP-violating asymmetry in K0 vs K̄0 → π+π−π0 decays differs from that in KL → π+π−, KL → π0π0 or the semileptonic KL transitions, if there exists CPT violation in K0-K̄0 mixing. A delicate measurement of this difference at a super flavor factory (e.g., the ϕ factory) will provide us with a robust test of CPT symmetry in the neutral kaon system.