Anomalous enhancement of a penguin hadronic matrix element in B ---> K eta-prime

GĂ©rard, Jean-Marc;Kou, E.

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Abstract
(en) We estimate the density matrix element for the pi^0, eta and eta' production from the vacuum in the large-N_c limit. As a consequence, we find that the QCD axial anomaly leads to highly non-trivial corrections to the usual flavour SU(3) relations between B^0-> K^0 pi^0, B^0-> K^0 eta and B^0-> K^0 eta' decay amplitudes. These corrections may explain why the B-> K eta' branching ratio is about six times larger than the B-> K pi one. Comment: 5 pages, 1 figure
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  • Institution iconUCLouvain

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Anomalous enhancement of a penguin hadronic matrix element in B ---> K eta-prime. (n.d.). https://hdl.handle.net/2078.5/256835