We propose a method for determining ␥ using B Ϯ →DK Ϯ decays followed by a multibody D decay, such as D→K S Ϫ ϩ , D→K S K Ϫ K ϩ , and D→K S Ϫ ϩ 0 . The main advantages of the method are that it uses only Cabibbo allowed D decays, and that large strong phases are expected due to the presence of resonances. Since no knowledge about the resonance structure is needed, ␥ can be extracted without any hadronic uncertainty.

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Centre d'études et d'expertise sur les risques, l'environnement, la mobilité et l'aménagement

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