Measurements of Branching Fractions and Dalitz Distributions for B0→D(*)±K0π∓ Decays

Abstract

We present measurements of the branching fractions for the three-body decays B 0 → D ( * ) ∓ K 0 π ± and their resonant submodes B 0 → D ( * ) ∓ K * ± using a sample of approximately 88 × 10 6 B ¯¯¯ B pairs collected by the BABAR detector at the SLAC PEP-II asymmetric energy storage ring. We measure: B ( B 0 → D ∓ K 0 π ± ) = ( 4.9 ± 0.7 stat ± 0.5 syst ) × 10 − 4 , B ( B 0 → D * ∓ K 0 π ± ) = ( 3.0 ± 0.7 stat ± 0.3 syst ) × 10 − 4 , B ( B 0 → D ∓ K * ± ) = ( 4.6 ± 0.6 stat ± 0.5 syst ) × 10 − 4 , B ( B 0 → D * ∓ K * ± ) = ( 3.2 ± 0.6 stat ± 0.3 syst ) × 10 − 4 . From these measurements we determine the fractions of resonant events to be f ( B 0 → D ∓ K * ± ) = 0.63 ± 0.08 stat ± 0.04 syst and f ( B 0 → D * ∓ K * ± ) = 0.72 ± 0.14 stat ± 0.05 syst .