Search for B[superscript ±]→[K[superscript ∓]π[superscript ±]][subscript D]K[superscript ±] and Upper Limit on the b→u Amplitude in B[superscript ±]→DK[superscript ±]
Name
Aubert-2004-Search for B.pdf
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Author(s)
Sciolla, Gabriella
Yamamoto, R. K.
Cowan, Ray F
Taylor, Frank E
Alternative Title
Search for B±→[K∓π±]DK± and Upper Limit on the b→u Amplitude in B±→DK±
Date Issued
September 2004
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aubert, B. et al. “Search for B±→[K∓π±]DK± and Upper Limit on the B→u Amplitude in B±→DK±.” Physical Review Letters 93.13 (2004): Web. 18 May 2012. © 2004 American Physical Society
Version
Final published version
Abstract
We search for B[superscript ±]→[K[superscript ∓]π[superscript ±]]DK[superscript ±] decays, where [K[superscript ∓]π[superscript ±]][subscript D] indicates that the K[superscript ∓]π[superscript ±] pair originates from the decay of a D[superscript 0] or D̅[superscript 0). Results are based on 120×10[superscript 6] Υ(4S)→BB̅ decays collected with the BABAR detector at SLAC. We set an upper limit on the ratio R[subscript Kπ]≡ [Γ(B[superscript +]→[K[superscript -]π[superscript +]]DK[superscript +])+Γ(B[superscript -]→[K[superscript +]π[superscript -]]DK[superscript -])]/[Γ(B[superscript +]→[K[superscript +]π[superscript -]][subscript D]K[superscript +])+Γ(B[superscript -]→[K[superscript -]π[superscript +]][subscript D]K[superscript -])]<0.026 (90% C.L.). This constrains the amplitude ratio r[subscript B]≡ |A(B[superscript -]→D̅ [superscript 0]K[superscript -])/A(B[superscript -]→D[superscript 0]K[superscript -])|<0.22 (90% C.L.), consistent with expectations. The small value of r[subscript B] favored by our analysis suggests that the determination of the Cabibbo-Kobayashi-Maskawa phase γ from B→DK will be difficult.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.93.131804
