Search for the rare decay KS0→μ +μ-

The LHCb Collaboration

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A search for the decay KS0 μ+μ - is performed, based on a data sample of 1.0 fb-1 of pp collisions at s=7 TeV collected by the LHCb experiment at the Large Hadron Collider. The observed number of candidates is consistent with the background-only hypothesis, yielding an upper limit of B (KS 0 → μ+μ-) < 11(9) × 10 -9 at 95 (90)% confidence level. This limit is a factor of thirty below the previous measurement.

Original languageEnglish
Article number90
Number of pages18
JournalJournal of High Energy Physics
Issue number1
Publication statusPublished - 14 Jan 2013
Externally publishedYes


  • Hadron-Hadron Scattering

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