Estimate of SU(3) flavour symmetry breaking in Bs -> K+ K- vs. Bd -> pi+π- decay
Abstract
I estimate the SU(3) flavour symmetry breaking in the ratio of penguin-to-tree ratios of the decays Bs K+ K- and Bdπ+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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