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

We study the implication of the time-dependent CP asymmetry in B → π+ π− decays on the extraction of weak phases taking into account the precise measurement of sin 2β, obtained from the “gold-plated” mode B → J/ψKs. Predictions and uncertainties for the hadronic parameters are investigated in QCD factorization. Fürthermore, 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 → π+ π− and B → J/ψKS is derived.