Lawrence Berkeley National Laboratory

Measurements of CP observables in B^±→DK^± and B^±→Dπ^± decays are presented where the D meson is reconstructed in the final states K^±π^∓, π^±K^∓, K⁺K⁻, π⁺π⁻, K^±π^∓π⁺π⁻, π^±K^∓π⁺π⁻ and π⁺π⁻π⁺π⁻. This analysis uses a sample of charged B mesons from pp collisions collected by the LHCb experiment in 2011 and 2012, corresponding to an integrated luminosity of 3.0 fb⁻¹. Various CP-violating effects are reported and together these measurements provide important input for the determination of the unitarity triangle angle γ. The analysis of the four-pion D decay mode is the first of its kind.