DETERMINATION of FROM CHARMLESS B → M1M2 DECAYS USING U-SPIN

In our previous paper we applied U-spin symmetry to charmless hadronic B ± → M 0 M ± decays for the purpose of precise extraction of the unitarity angle . In this paper we extend our approach to neutral B 0 and Bs → M1M2 decays. A very important feature of this method is that no assumptions regarding relative sizes of topological decay amplitudes need to be made. As a result, this method avoids an uncontrollable theoretical uncertainty that is often related to the neglect of some topological diagrams (e.g., exchange and annihilation graphs) in quark-diagrammatic approaches. In charged B ± decays, each of the four data sets, P 0 P ± , P 0 V ± , V 0 P ± and V 0 V ± , with P ≡ pseudoscalar and V ≡ vector, can be used to obtain a value of . Among neutral decays, only experimental data in the B 0 ,Bs → P − P + subsector is sufficient for a U-spin fit. Application