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First Observation of B[over-bar][subscript s][superscript 0]-->D[subscript s][superscript ±]K[superscript ∓] and Measurement of the Ratio of Branching Fractions B(B[over-bar][subscript s][superscript 0]-->D[subscript s][superscript ±]K[superscript ∓]/B([over-bar][subscript s][superscript 0]-->D[subscript s][superscript +] pi[superscript -])

Author(s)
Choudalakis, Georgios; Gomez-Ceballos, Guillelmo; Hahn, Kristian Allan; Henderson, C.; Knuteson, Bruce O.; Xie, Si; Paus, Christoph M. E.; Bauer, Gerry P; Makhoul, Khaldoun; ... Show more Show less
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Alternative title
First Observation of B̅ s0→Ds±K∓ and Measurement of the Ratio of Branching Fractions B(B̅ s0→Ds±K∓)/B(B̅ s0→Ds+π-)
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
A combined mass and particle identification fit is used to make the first observation of the decay B[over-bar] s0-->Ds±K∓ and measure the branching fraction of B[over-bar] s0-->Ds±K∓ relative to B[over-bar] s0-->Ds+pi-. This analysis uses 1.2  fb-1 integrated luminosity of pp[over-bar] collisions at [sqrt]s=1.96  TeV collected with the CDF II detector at the Fermilab Tevatron collider. We observe a B[over-bar] s0-->Ds±K∓ signal with a statistical significance of 8.1σ and measure B(B[over-bar] s0-->Ds±K∓)/B(B[over-bar] s0-->Ds+pi-)=0.097±0.018(stat)±0.009(syst).
Date issued
2009-11
URI
http://hdl.handle.net/1721.1/54819
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
CDF Collaboration et al. “First Observation of B-bars-->Ds±K± and Measurement of the Ratio of Branching Fractions B(B-bars-->Ds±K±)/B(B-bars-->Ds+ pi -).” Physical Review Letters 103.19 (2009): 191802. © 2009 American Physical Society.
Version: Final published version
ISSN
0031-9007

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