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A measurement of the gluon splitting rate into $b\overline{b}$ pairs in hadronic Z decays (1998)

Abstract
A measurement of the fraction of hadronic Z decays in which a gluon splits into a $b \bar{b}$ pair, \gbb, is presented using data collected by {\t extsc ALEPH} from 1992 to 1995 at the Z resonance. The selection is based on four-jet events. Events are selected by means of topo logical cuts and a lifetime tag. The result is $g_{b \bar{b}}=(2.77 \pm 0.42 \rm {(stat)} \pm 0.57 \rm{(syst)}) \tim es 10^{-3}$.

Publication details
Download http://preprints.cern.ch/cgi-bin/setlink?base=preprint&categ=cern&id=ep-98-103
http://cdsweb.cern.ch/record/359635/files/ep-98-103.pdf
http://cdsweb.cern.ch/record/359635/files/ep-98-103.ps.gz
Repository CERN Document Server (Switzerland)
Keywords Particle Physics - Experimental Results
Language eng