Determining γ using B^±→DK^± with multibody D decays

We propose a method for determining γ using B ^±→DK^± decays followed by a multibody D decay, such as D→K_Sπ^-π⁺, D→K_SK^-K⁺, and D→K_Sπ ^-π⁺π⁰. 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, γ can be extracted without any hadronic uncertainty.