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Transverse momentum distribution and gluon radiation in e+ e- annihilations

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Journal: Iranian Journal of Physics Research
ISSN 1682-6957

Volume: 3;
Issue: 2;
Start page: 83;
Date: 2002;
Original page

Keywords: jets | quarks | transverse momentum

ABSTRACT
  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.

Tango Rapperswil
Tango Rapperswil

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