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

Abstract

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

6 pages, no figure