Measurement of the B 0 → K *0 e + e - Branching fraction at low dilepton mass

The LHCb Collaboration

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Abstract

The branching fraction of the rare decay B 0 → K *0 e + e - in the dilepton mass region from 30 to 1000 MeV/c 2 has been measured by the LHCb experiment, using pp collision data, corresponding to an integrated luminosity of 1.0 fb-1, at a centre-of-mass energy of 7 TeV. The decay mode B 0 → J/ψ (e + e -)K *0 is utilized as a normalization channel. The branching fraction B(B 0 → K *0 e + e -) is measured to be B(B 0 → K *0 e + e -)30-1000 MeV/c2=(3.1+0.9 -0.80.2-0.3 ± 0.2) × 10 -7 where the first error is statistical, the second is systematic, and the third comes from the uncertainties on the B 0 → J/ψ K *0 and J/ψ → e + e - branching fractions. [Figure not available: see fulltext.]

Original languageEnglish
Article number159
Number of pages18
JournalJournal of High Energy Physics
Volume2013
Issue number5
DOIs
Publication statusPublished - 29 May 2013
Externally publishedYes

Keywords

  • B physics
  • Branching fraction
  • Flavour Changing Neutral Currents
  • Hadron-Hadron Scattering
  • Rare decay

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