Evidence for the decay BS0→K¯∗0μ+μ

The LHCb Collaboration

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Abstract

A search for the decay BS0→K¯∗0μ+μ− is presented using data sets corresponding to 1.0, 2.0 and 1.6 fb−1 of integrated luminosity collected during pp collisions with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, respectively. An excess is found over the background-only hypothesis with a significance of 3.4 standard deviations. The branching fraction of the BS0→K¯∗0μ+μ− decay is determined to be ℬ(Bs0→K¯∗0μ+μ−)=[2.9±1.0(stat)±0.2(syst)±0.3(norm)]×10−8, where the first and second uncertainties are statistical and systematic, respectively. The third uncertainty is due to limited knowledge of external parameters used to normalise the branching fraction measurement.
Original languageEnglish
Article number20
Number of pages24
JournalJournal of High Energy Physics
Volume2018
Issue number7
DOIs
Publication statusPublished - 2018
Externally publishedYes

Keywords

  • Rare decay
  • Hadron-Hadron scattering (experiments)
  • Flavor physics
  • FCNC Interaction
  • B physics

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