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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

Author(s)
Williams, Michael
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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.
Date issued
2013-09
URI
http://hdl.handle.net/1721.1/81350
Department
Massachusetts Institute of Technology. Department of Physics
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
Version: Final published version
ISSN
0031-9007
1079-7114

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