توزیع تکانه عرضی و تابش گلویون درفرآیندهای نابودی e‏+e - درانرژی مرکزجرم 60GeV

  We report on an experimental comparison of the characteristics of quark-induced jets based on an analysis of jet events selected from hadronic events at c.m. energy of 60 GeV in e+e- annihilations. The triangle plot shows that the majority are two-jet events. The three-jet events are also present but not as many as two-jet events. The mean transverse momentum is larger for three-jet events than the corresponding value for the two-jet events. This is in qualitative agreement with QCD theory, which predicts a greater probality for gluon radiation in three-jet events. Furthermore, the particles in the gluon-enriched sample have a higher multiplicity than its counterpart in quark jet sample. The ratio of the multiplicities is 1.506± 0.067. This numerical value is in good quantitative agreement with the OPAL experiment. Possible explanation for all these features will be presented in this paper.