Measurement of the B[0 over s]→μ[superscript +]μ[superscript -] Branching Fraction and Search for B[superscript 0]→μ[superscript +]μ[superscript -] Decays at the LHCb Experiment
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Aaij_Measurement-of-the-B.pdf
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Author(s)
Williams, Michael
Date Issued
September 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. “Measurement of the B_{s}^{0}→μ^{+}μ^{-} Branching Fraction and Search for B^{0}→μ^{+}μ^{-} Decays at the LHCb Experiment.” Physical Review Letters 111, no. 10 (September 2013). © 2013 CERN
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Final published version
Abstract
A search for the rare decays B[0 over s]→μ[superscript +]μ[superscript -] and B[superscript 0]→μ[superscript +]μ[superscript -] is performed at the LHCb experiment. The data analyzed correspond to an integrated luminosity of 1 fb[superscript -1] of pp collisions at a center-of-mass energy of 7 TeV and 2 fb[superscript -1] at 8 TeV. An excess of B[0 over s]→μ[superscript +]μ[superscript -] signal candidates with respect to the background expectation is seen with a significance of 4.0 standard deviations. A time-integrated branching fraction of B(B[0 over s]→μ[superscript +]μ[superscript -])=(2.9[+1.1 over -1.0])×10[superscript -9] is obtained and an upper limit of B(B[superscript 0]→μ[superscript +]μ[superscript -])<7.4×10[superscript -10] at 95% confidence level is set. These results are consistent with the standard model expectations.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.111.101805
