Analysis ofCP violation in possible experiments on Ko decay

Abstract

The phenomenological analysis ofCP violation in K0→2σ is reviewed in order to relate the information obtainable to various classes of Hamiltonian models. In particular, it is shown that two additional experiments beyond the rate of KL0→π++π- are necessary to determine one newCP-violating parameter, which is proportional to the δI=1/2violating amplitude. While a nonzero value of this parameter would rule out several classes of models, a zero value would rule out none. A test of CPT invariance from Ko→2σ decays is presented. The analysis is extended to the charge asymmetry in the leptonic decays of KLo