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Title: Search for b→u transitions in B±→[Kπ±π⁰]DK± decays

Journal Article · · Physical Review. D, Particles, Fields, Gravitation and Cosmology
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We present a study of the decays B±→DK± with D mesons reconstructed in the K⁺π⁻π⁰ or K⁻π⁺π⁰ final states, where D indicates a D⁰ or a D¯¯¯0 meson. Using a sample of 474×10⁶ BB¯¯¯ pairs collected with the BABAR detector at the PEP-II asymmetric-energy e⁺e⁻ collider at SLAC, we measure the ratios R±≡((Γ(B±→[Kπ±π⁰]DK±))/((Γ(B±→[K±ππ⁰]DK±)). We obtain R⁺=(5⁺12⁻10(stat)⁺2⁻4(syst))×10⁻³ and R⁻=(12⁺12⁻10(stat)⁺3⁻5(syst))×10⁻³, from which we extract the upper limits at 90% probability: R⁺<23×10⁻³ and R⁻<29×10⁻³. Using these measurements, we obtain an upper limit for the ratio rB of the magnitudes of the b→u and b→c amplitudes rB<0.13 at 90% probability.

Sponsoring Organization:
USDOE
OSTI ID:
1099718
Journal Information:
Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Vol. 84 Journal Issue: 1; ISSN 1550-7998
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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