Search for B[subscript s][superscript 0]→μ[superscript +]μ[superscript -] and B[superscript 0]→μ[superscript +]μ[superscript -] Decays with CDF II
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Aaltonen-2011-Letters-Search for B0s.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Makhoul, Khaldoun
Paus, Christoph M. E.
Bauer, Gerry P
Date Issued
November 2011
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Search for B_{s}^{0}→μ^{+}μ^{-} and B^{0}→μ^{+}μ^{-} Decays with CDF II.” Physical Review Letters 107.19 (2011). © 2011 American Physical Society
Version
Final published version
Abstract
A search has been performed for B[subscript s][superscript 0]→μ[superscript +]μ[superscript -] and B[superscript 0]→μ[superscript +]μ[superscript -] decays using 7 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 -])<6.0×10-[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 0.27%. 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 1.9%. These data are used to determine B(B[subscript s][superscript 0]→μ[superscript +]μ[superscript -])= (1.8[subscript -0.9][superscript+1.1])×10[superscript -8] and provide an upper limit of B(B[subscripts 0]→μ[superscript +] μ[superscript -])<4.0×10[superscript -8] at 95% confidence level.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.107.191801
