Non-leptonic B-decays, CP violation & the UT

We study the implication of the time-dependent CP asymmetry in $B\toπ^+π^-$ decays on the extraction of weak phases taking into account the precise measurement of $\sin 2β$, obtained from the ``gold-plated''mode $B\to J/ψK_S$. Predictions and uncertainties for the hadronic parameters are investigated in QCD factorization. Furthermore, independent theoretical and experimental tests of the factorization framework are briefly discussed. Finally, a model-independent bound on the unitarity triangle from CP violation in $B\toπ^+π^-$ and $B\to J/ψK_S$ is derived.

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