Isospin amplitudes and CP violation in $(B \to Kπ)$ decays

We present a simple isospin invariant parametrization for $(B \to Kπ)$ decay amplitudes which consistently includes CP violation and (quasi-elastic) hadronic final states interactions. We find that the observed $(B \to Kπ)$ decays do not lead to a significant bound on the angle $γ$ of the unitarity triangle. On the other hand, we claim that a sizeable CP violation asymmetry in $(B^{\pm} \to Kπ^{\pm})$ rates is by no means excluded.

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