A test of CPT symmetry in K 0 vs K̄ 0 → π + π − π 0 decays

Symmetry Be Tested With K 0 vs K̄ 0 → π + π − π 0 Decays ?

We show that the CP-violating effect in K vs K̄ → πππ decays differs from that in KL → π π, KL → π π or the semileptonic KL transitions, if there exists CPT violation in K-K̄ mixing. A delicate measurement of this difference in the KTeV experiment and at the φ factory will provide a new test of CPT symmetry in the neutral kaon system. PACS number(s): 11.30. Er, 13.25. Es, 14.40. Aq Typeset using ...

Search for direct CP violating charge asymmetries in K ± → π ± π + π − and K ± → π ± π 0 π 0 decays

A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes Ag = (g + − g)/(g + g) in K → πππ and K → πππ decays by the NA48/2 experiment at CERN SPS is presented. A new technique of asymmetry measurement involving simultaneous K and K beams and a large data sample collected allowed a result of an unprecedented precision. The charge asymmetries were measured to ...

Measurement of Γ ( K S → π + π − ( γ ) ) / Γ ( K S → π 0 π 0 )

We have measured the ratio R S = Γ(KS → π π(γ))/Γ(KS → π π) with the KLOE detector at the DAΦNE ee collider. This measurement is fully inclusive with respect to the ππγ final state. The sample of over 10 two-pion decays of tagged KS mesons allows a statistical error as low as ∼ 0.1% to be obtained. The accuracy is limited by systematic uncertainties, which are estimated primarily from data. We ...

0 Determination of γ from B̄ 0 → K − π + , π − π + Decays

We show that large electroweak penguin effects invalidate previously suggested methods to constraint and to determine the CP violating phase γ of the KM matrix using B̄0 → K−π+, π−π+ and B → K̄0π− decays. We obtain new results on the constraint and the determination of γ. It is found that present central values of experimental data on these decays exclude the range between 0.57 and 0.87 for γ whi...

Renormalization of K + K − → π 0 π + π −