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

UNSPECIFIED (1993) Measurement of the ratio Gamma (b anti-b) / Gamma (hadron) using event shape variables. Physics Letters B, 313 (3-4). pp. 549-563. ISSN 0370-2693

Abstract

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.