Abstract
An analysis of B±→DK± and B±→Dπ± decays is presented where the D meson is reconstructed in the four-body final state K±π∓π+π−. Using LHCb data corresponding to an integrated luminosity of 1.0fb−1, first observations are made of the suppressed ADS modes B±→[π±K∓π+π−]DK± and B±→[π±K∓π+π−]Dπ± with a significance 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 rKB=0.097±0.011.
Original language | English |
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Pages (from-to) | 44-53 |
Number of pages | 10 |
Journal | Physics Letters B |
Volume | B723 |
Early online date | 19 Mar 2013 |
DOIs | |
Publication status | Published - 10 Jun 2013 |