913A phenomenological study is given of the (possible) violation of CP and CPT symmetries in the A"'-K" system. Special attention is paid to the problem of phase ambiguity and phase convention.Mixing parameters and decay amplitudes are parametrized in a rephasing invariant way, and the well-known parameters 7'/+-and 7' /oo describing 2Jr modes as well as various leptonic asymmetries are expressed in terms of these parameters. The parameters E and L1 characterizing mixing between ) in terms of the strangeness eigenstates I~> and IK 0 ) and the CP eigenstates IK, 0 ) and IK2°>, their transformation property under CP, T and CPT operations is examined and the problem of phase ambiguity is discussed. Formulae relevant for a phenomenological analysis of 2;r decay modes at
A phenomenological and comprehensive study is given of the (possible) violation of CP, T and CPT symmetries in the KO -go system. Relevant decay amplitudes as well as mixing parameters are parametrized in a rephasing·invariant way, and formulae relevant to phenomenological analyses are derived. An attempt is made to derive constraints on these CP, T and/or CPT violating parameters from available experimental data. It is found, among other things, that the parameters which signal both CP and CPT violations are subject to large errors and at best only one or two orders smaller than those which signal both CP and T violations, the latter being known to be of order 10-3 • Furthermore, it is pointed out that those parameters which signal both T and CPT violations but not CP violation are not yet well constrained experimentally. §
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