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arXiv · hep-ph/0601129

Suppression of flavor symmetry breaking in B decay sum rules

Michael Gronau·Yuval Grossman·Guy Raz·Jonathan L. Rosner
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Abstract

While flavor symmetries are useful for studying hadronic B decays, symmetry relations for amplitudes and decay rates are usually violated by first order symmetry breaking corrections. We point out two cases in which first order symmetry breaking is suppressed by a small ratio of amplitudes: (1) An isospin sum rule for four $B\to Kπ$ decays, where isospin breaking is shown to be negligible. (2) An SU(3) sum rule for pairs of $B\to Kπ$ and $B\to Kη_8$, generalized to pairs of $B\to Kπ, B\to Kη$ and $B\to Kη'$.

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Michael Gronau, Yuval Grossman, Guy Raz, Jonathan L. Rosner. 2006-01-29. Suppression of flavor symmetry breaking in B decay sum rules. https://doi.org/10.1016/j.physletb.2006.02.066

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