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 ±]
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[...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/70888 https://orcid.org/0000-0002-7586-7253 |
| Summary: | 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. |
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