The branching fraction of Z --> bbBAR relative to all hadronic decays of the Z has been measured using event shape variables to preferentially select Z --> bbBAR 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 440000 hadronic Z decays collected with the ALEPH detector at LEP, the ratio GAMMA(bbBAR)/GAMMA(had) = 0.228+/-0.005(stat.)+/-0.005(syst.) is measured.
MEASUREMENT OF THE RATIO GAMMA-B(B)BAR/GAMMA HAD USING EVENT SHAPE VARIABLES
NUZZO, Salvatore Vitale;DE PALMA, Mauro;SELVAGGI, Giovanna
1993-01-01
Abstract
The branching fraction of Z --> bbBAR relative to all hadronic decays of the Z has been measured using event shape variables to preferentially select Z --> bbBAR 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 440000 hadronic Z decays collected with the ALEPH detector at LEP, the ratio GAMMA(bbBAR)/GAMMA(had) = 0.228+/-0.005(stat.)+/-0.005(syst.) is measured.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
