Search for b→u transitions in B±→[K∓π±π⁰]DK± decays
Journal Article
·
· Physical Review. D, Particles, Fields, Gravitation and Cosmology
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±→[K∓π±π⁰]DK±))/((Γ(B±→[K±π∓π⁰]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
Cited by: 17 works
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