Measurement of γ from B → DK decays at LHCb

We report results from the first measurements of the CKM angle γ using B → DK decays with the LHCb experiment. Three well established methods are used to extract the CP observables. The updated measurement of γ in the three-body D0 Dalitz space results in γ = (57±16)deg.. When combining the observables from all B → DK studies, the best fit value for γ belongs to [0, 180]deg. is γ = 67.2 with γ belongs to [55.1, 79.1]deg. at 68%CL and γ belongs to [43.9, 89.5]deg. at 95%CL. This represents the most precise values directly measured by a single experiment. Furthermore, a new time-dependent approach using Bs0 → Ds±K± decays is used for the first time to measure CP observables and future prospects for γ at LHCb are given. (authors)