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Weak phases from the $B\to ππ$, $Kπ$ decays

Yeo-Yie Charng·Hsiang-nan Li
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Abstract

Recent data of two-body nonleptonic $B$ meson decays allow a topological-amplitude analysis up to the $O(λ^2)$ accuracy, where $λ$ denotes the Wolfenstein parameter. We find a solution from the $B\toππ$ data and a solution from the $B\to Kπ$ data, which satisfy the approximate SU(3) flavor symmetry. These solutions indicate that the color-suppressed tree amplitude is large, all other amplitudes can be understood within the standard model, and the weak phases $ϕ_2\approx 90^o$ and $ϕ_3\approx 60^o$ are consistent with the global unitarity triangle fit.

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Yeo-Yie Charng, Hsiang-nan Li. 2005-02-06. Weak phases from the $B\to ππ$, $Kπ$ decays. https://doi.org/10.1103/physrevd.71.014036

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