Improved Limit on the Branching Fraction of the Rare Decay K[superscript 0][subscript s] → μ[superscript +]μ[superscript -]
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 obser...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
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Springer/Società Italiana di Fisica
2018
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| Online Access: | http://hdl.handle.net/1721.1/116617 https://orcid.org/0000-0001-5534-1732 https://orcid.org/0000-0001-8285-3346 |
| Summary: | 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. |
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