Study of B0 ? ?+ ?- Decays and implications for the CKM angle ? 2

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2016

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We present a measurement of the branching fraction and the longitudinal polarization fraction of B0??+?- decays, as well as the time-dependent CP violating parameters in decays into longitudinally polarized ?+?- pairs with Belle's final data set of 772�106 BB� pairs, at the (4S) resonance, collected at the asymmetric-energy e+e- collider KEKB. We obtain B(B0??+?-)=(28.3�1.5(stat)�1.5(syst))�10-6, fL=0.988�0.012(stat)�0.023(syst), ACP=0.00�0.10(stat)�0.06(syst), SCP=-0.13�0.15(stat)�0.05(syst). We perform an isospin analysis to constrain the Cabibbo-Kobayashi-Maskawa angle ?2 and obtain two solutions with ?2=(93.7�10.6)�, being most compatible with other Standard-Model based fits to the data. � 2016 American Physical Society.

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