Search for B [0 over subscript s]→μ[superscript +]μ[superscript -] and B[superscript 0]→μ[superscript +]μ[superscript -] decays with the full CDF Run II data set
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Aaltonen-2013-Search.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
April 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaltonen, T., S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, et al. Search for B_{s}^{0}→μ^{+}μ^{-} and B^{0}→μ^{+}μ^{-} Decays with the Full CDF Run II Data Set. Physical Review D 87, no. 7 (April 2013). © 2013 American Physical Society
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Final published version
Abstract
We report on a search for B [0 over subscript s]→μ[superscript +]μ[superscript -] and B[superscript 0]→μ[superscript +]μ[superscript -] decays using proton-antiproton collision data at √s=1.96 TeV corresponding to 10 fb[superscript -1] of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. The observed number of B[superscript 0] candidates is consistent with background-only expectations and yields an upper limit on the branching fraction of B(B[superscript 0]→μ[superscript +]μ[superscript -])<4.6×10[superscript -9] at 95% confidence level. We observe an excess of B[subscript s][superscript 0] candidates. The probability that the background processes alone could produce such an excess or larger is 0.94%. The probability that the combination of background and the expected standard model rate of B[subscript s][superscript 0]→μ[superscript +]μ[superscript -] could produce such an excess or larger is 6.8%. These data are used to determine a branching fraction B(B[subscript s][superscript 0]→μ[superscript +]μ[superscript -])=(1.3[subscript -0.7][superscript +0.9])×10[superscript -8] and provide an upper limit of B(B[subscript s][superscript 0]→μ[superscript +]μ[superscript -])<3.1×10[superscript -8] at 95% confidence level.
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/PhysRevD.87.072003
