Improved Limit on the Branching Fraction of the Rare Decay K[superscript 0][subscript s] → μ[superscript +]μ[superscript -]
Author(s)
Boettcher, Thomas Julian; Ilten, Philip J; Williams, Michael
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A search for the decay K[subscript 0][subscript s]→μ[superscript +]μ[superscript -] is performed, based on a data sample of proton-proton collisions corresponding to an integrated luminosity of 3fb[superscript -1], collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The observed yield is consistent with the background-only hypothesis, yielding a limit on the branching fraction of B(K[superscript 0][subscript S]→μ[superscript +]μ[superscript -])<0.8(1.0)×10[superscript -9] at 90%(95%) confidence level. This result improves the previous upper limit on the branching fraction by an order of magnitude.
Date issued
2017-10Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
The European Physical Journal C
Publisher
Springer/Società Italiana di Fisica
Citation
LHCb Collaboration, et al. “Improved Limit on the Branching Fraction of the Rare Decay K[superscript 0][subscript s] → μ[superscript +]μ[superscript -].” The European Physical Journal C, vol. 77, no. 10, Oct. 2017. © 2017 CERN for the benefit of the LHCb collaboration
Version: Final published version
ISSN
1434-6044
1434-6052