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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 ±]

Author(s)
Sciolla, Gabriella; Yamamoto, R. K.; Cowan, Ray F; Taylor, Frank E
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Alternative title
Search for B±→[K∓π±]DK± and Upper Limit on the b→u Amplitude in B±→DK±
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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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.
Date issued
2004-09
URI
http://hdl.handle.net/1721.1/70888
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
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
ISSN
0031-9007
1079-7114

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