$B \to ππ$ decays: branching ratios and CP asymmetries
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Theoretically motivated smallness of the penguin amplitude in $B \to ππ$ decays allowes to calculate the value of the unitarity triangle angle $α(ϕ_2)$ with good accuracy. The relatively large branching ratio of the decay into $π^0 π^0$ is explained by the large value of FSI phase difference between $ΔI = 1/2$ and $ΔI = 3/2$ tree amplitudes.
Analysis of direct CPV asymmetries is expanded; the relation with that in $Kπ$ decays is discussed. Submitted to Yad. Fiz
Analysis of direct CPV asymmetries is expanded; the relation with that in $Kπ$ decays is discussed. Submitted to Yad. Fiz