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Measurement of the ratio Gamma (b anti-b) / Gamma (hadron) using event shape variables

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • ALEPH Collaboration
<mark>Journal publication date</mark>1993
<mark>Journal</mark>Physics Letters B
Issue number3-4
Number of pages15
Pages (from-to)549-563
Publication StatusPublished
<mark>Original language</mark>English


The branching fraction of relative to all hadronic decays of the Z has been measured using event shape variables to preferentially select events. The method chosen applies a combination of shape discriminators and the selection of high transverse momentum leptons to event hemispheres. From a sample of 440 000 hadronic Z decays collected with the ALEPH detector at LEP, the ration is measured.