Eine umfassende Studie der Eigenschaften von Gluon- und Quark-Jets

Three jet events arising from decays of the Z boson, collected by the DELPHI detector at LEP, were used to compare properties of gluon and quark jets. The charged hadron multiplicity in a cone perpendicular to the event plane of symmetric three jet events was determined. The measurement constitutes a test of the colour coherence property of QCD and of LPHD. The production spectra of the identified particles K sup+-, pi sup+-, p, and p were found to be softer in gluon jets compared to quark jets, with a higher multiplicity in gluon jets as observed for inclusive charged particles.