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 D 0 and D-0 mesons, decaying into K +K -, π +π -, K ±π ∓, K ±π ∓π ±π ∓, KS0π+π-, or KS0K+K- 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 setγ∈[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 intervalsγ∈[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 intervalsγ∈[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 D 0-D-0 mixing.
|Number of pages||13|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 1 Jan 2013|
Copyright 2019 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics