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Particle Distribution in Three Jet Events Produced by e+ e- Annihilation

Research output: Contribution to journalJournal article


Journal publication date1983
JournalZeitschrift für Physik C Particles and Fields
Number of pages16
Original languageEnglish


We have studied the distribution of particles within and between jets of 3-jet final states produced in the reactione + e −→hadrons at c.m. energies of 22 GeV and 29–36.4 GeV. The lowest energy jet shows distributions of transverse momenta, particle flow, and energy flow which differ significantly from those of the other two jets and from jets of 2-jet events atE cm=14 GeV. First order QCD calculations with subsequent fragmentation of quarks and gluons into hadrons indicate that the lowest energy jet has the largest probability of originating from a gluon. To reproduce the observed differences in an independent parton fragmentation model, the secondary quarks of a gluon jet have to have higher transverse momenta and lower parallel momenta than those of a quark jet. The particle densities between the jets as well as the correlation of transverse and longitudinal momenta of the particles within the jets favour models with fragmentation along the colour axes.