A combination of three LHCb measurements of the CKM angle γ is presented. The decays B±→DK± and B±→Dπ± are used, where D denotes an admixture of D0 and View the MathML source mesons, decaying into K+K−, π+π−, K±π∓, K±π∓π±π∓, or final states. All measurements use a dataset corresponding to 1.0 fb−1 of integrated luminosity. Combining results from B±→DK± 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±→Dπ± 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±→DK± and B±→Dπ± 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–mixing.
|Titolo:||Measurement of the CKM angle γ from a combination of B±→Dh± analyses|
|Data di pubblicazione:||2013|
|Appare nelle tipologie:||1.1 Articolo su Rivista|