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Estimate of SU(3) flavour symmetry breaking in B_s -> K^+ K^- vs. B_d -> pi^+π^- decay

M. Beneke
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Abstract

I estimate the SU(3) flavour symmetry breaking in the ratio of penguin-to-tree ratios of the decays B_s\to K^+ K^- and B_d\toπ^+π^-, given an assumption on the flavour symmetry breaking of the hadronic input parameters. The decay amplitudes are calculated in QCD factorization. Implications for the determination of gamma are discussed.

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M. Beneke. 2003-08-05. Estimate of SU(3) flavour symmetry breaking in B_s -> K^+ K^- vs. B_d -> pi^+π^- decay. https://arxiv.org/abs/hep-ph/0308040

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