Abstract

We study CP violation and final state interactions between pions and kaons in B+, B−, −B0 and B̄0 decays into Kππ. The weak transition amplitudes consist of two terms: the first part is derived in QCD factorization approach and the second one is a phenomenological long‐distance charming penguin contribution. The final state Kπ interactions in S‐ and P‐waves are described by strange scalar and vector form factors, respectively. These are determined using a unitary coupled channel model together with chiral symmetry and asymptotic QCD constraints. The final state interactions are dominated by presence of the scalar K0*(1430) and the vector K*(892) resonances. We show that additional charming penguin amplitudes are needed to reproduce the latest experimental Kπ effective mass and helicity angle distributions, branching fractions and asymmetries obtained by Belle and BaBar collaborations.

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