Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1996-09-10
Nucl.Phys.Proc.Suppl.54A:39-43,1997
Physics
High Energy Physics
High Energy Physics - Experiment
Latex, 5 pages, 3 figures,to appear in the Proceedings of the High Energy Physics International Euroconference on Quantum Chro
Scientific paper
10.1016/S0920-5632(97)00011-X
Identified $b\overline{b}g$ and $q\overline{q}\gamma$ events from DELPHI are used to measure the ratio of the mean charged particle multiplicity distribution between gluon and quark jets. The dependence of this ratio with the jet energy is established using about three million Z$^0$ decays. Results from all other detectors are discussed and compared. A nice agreement is found among all them. The ratio between the normalized total three-jet cross sections of $b\overline{b}g$ and $q\overline{q}g, q \equiv u,d,s$ events is also determined. The preliminary value obtained indicates that $b$ quarks are experimentaly seen to radiate less than light quarks due to their higher mass. The suggested experimental error is $\sim$300 MeV for the $b$ mass determination at the M$_Z$ scale.
Cabrera Sergio
Fuster Joan
Garcia Marti S. i.
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