B -> K eta(') decay in perturbative QCD
E. Kou, A. I. Sanda
Abstract
We compute B->K eta' branching ratio using perturbative QCD approach. We show that a triangular relation among amplitudes for B0->K0 pi0, B0->K0 eta, B0->K0 eta' receives large corrections from SU(3) breaking effects. If experimental value will come closer to the lower limit of the present BELLE data there will be a possibility to understand the large branching ratio of B0->K0 eta'. Otherwise, we perhaps need to modify our understanding of eta' meson, for example, inclusion of a possible admixture of gluonium state.
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