An analysis of B ± → DK ± and B ± → Dπ ± decays is presented where the D meson is reconstructed in the four -body nal state K ±π ∓π +π-. Using LHCb data corresponding to an integrated luminosity of 1.0 fb -1, rst observations are made of the suppressed ADS modes B ± →[π ±K ∓π +π-] D K ± and B ± → [π ±K ∓π +π-]Dπ ± with a signicance of 5.1σ and greater than 10σ, respectively. Measurements of CP asymmetries and CP -conserving ratios of partial widths from this family of decays are also performed. The magnitude of the ratio between the suppressed and favoured B ± → DK ± amplitudes is determined to be r K B = 0.097±0.011.
|Número de páginas||10|
|Publicación||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Estado||Published - 10 jun 2013|
|Publicado de forma externa||Sí|
All Science Journal Classification (ASJC) codes
- Física nuclear y de alta energía