O ct 2 00 8 The use of quantum-correlated D 0 decays for φ 3 measurement

We report the results of the Monte-Carlo study of the method to determine the CKM angle φ3 using Dalitz plot analysis of D 0 produced in B → DK decay. Our main goal is to find the optimal strategy for a model-independent φ3 extraction. We find that the analysis using decays of CP -tagged D mesons only cannot provide a completely model-independent measurement in the case of a limited data sample. The procedure involving binned analysis of B → DK and ψ(3770) → (K Sπ π)D(K 0 Sπ π)D decays is proposed which, in contrast, allows not only to reach the φ3 precision comparable to an unbinned model-dependent fit, but also provides an unbiased measurement with currently available data.