Search for b→u transitions in B±→[K∓π±π0]DK± decays
Author(s)
Dujmic, Denis; Sciolla, Gabriella; Cowan, Ray F
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We present a study of the decays B[superscript ±]→DK[superscript ±] with D mesons reconstructed in the K[superscript +]π[superscript -]π[superscript 0] or K[superscript -]π[superscript +]π[superscript 0] final states, where D indicates a D[superscript 0] or a D̅[superscript 0] meson. Using a sample of 474×10[superscript 6] BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric-energy e[superscript +]e[superscript -] collider at SLAC, we measure the ratios R[superscript ±]≡Γ(B[superscript ±]→[K[superscript ∓]π[superscript ±π]0][subscript D]K[superscript ±])/Γ(B[superscript ±]→[K[superscript ±]π[superscript ∓]π[superscript 0]][subscript D]K[superscript ±]). We obtain R[superscript +]=(5[subscript -10][superscript +12](stat)-4[superscript +2](syst))×10[superscript -3] and R-=(12[subscript -10][[superscript +12](stat)[subscript -5][[superscript +3](syst))×10[superscript -3], from which we extract the upper limits at 90% probability: R[superscript +]<23×10[superscript -3] and R[superscript -]<29×10[superscript -3]. Using these measurements, we obtain an upper limit for the ratio r[subscript B] of the magnitudes of the b→u and b→c amplitudes r[subscript B]<0.13 at 90% probability.
Date issued
2011-07Department
Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. et al. “Search for b→u transitions in B^{±}→[K^{∓}π^{±}π^{0}]_{D}K^{±} decays.” Physical Review D 84 (2011): n. pag. Web. 8 Nov. 2011. © 2011 American Physical Society
Version: Final published version
ISSN
1550-7998
1550-2368