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

Research output: Contribution to journalJournal article


Journal publication date1993
JournalPhysics Letters B
Number of pages15
Original languageEnglish


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.