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 -])
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Aaltonen-2009-First Observation of .pdf
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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
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-)
Date Issued
November 2009
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
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).
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
http://dx.doi.org/10.1103/PhysRevLett.103.191802
