Measurement of the CKM Angle γ from a Combination of B± → D h± Analyses

A combination of three LHCb measurements of the CKM angle γ is presented. The decays B± → D K± and B± → D π± are used, where D denotes an admixture of D0 and anti-D0 mesons, decaying into K+ K−, π+ π−, K± π∓, K± π∓ π± π∓, K0S π+ π−, or K0S K+ K− final states. All measurements use a dataset corresponding to 1.0 fb^−1 of integrated luminosity. Combining results from B± → D K± decays alone a best-fit value of γ = 72.0° is found, and confidence intervals are set γ ∈ [56.4,86.7]° at 68% CL, γ ∈ [42.6,99.6]° at 95% CL. The best-fit value of γ found from a combination of results from B± → D π± decays alone, is γ = 18.9°, and the confidence intervals γ ∈ [7.4,99.2]° ∪ [167.9,176.4]° at 68% CL are set, without constraint at 95% CL. The combination of results from B± → D K± and B± → D π± decays gives a best-fit value of γ = 72.6° and the confidence intervals γ ∈ [55.4,82.3]° at 68% CL, γ ∈ [40.2,92.7]°at 95% CL are set. All values are expressed modulo 180°, and are obtained taking into account the effect of D0 anti-D0 mixing.