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Observation of the suppressed ADS modes B±→[π±K∓π+π−]DK± and B±→[π±K∓π+π−]Dπ±

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)44-53
Number of pages10
JournalPhysics Letters B
VolumeB723
Early online date19 Mar 2013
DOIs
StatePublished - 10 Jun 2013

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.

ID: 8093434