Measurements of the Quark and Gluon Fragmentation Functions and of Hadron Production at LEP

Abstract

The large amount of hadronic events collected at LEP during the run at the Z⁰ peak allows a detailed study of the production of hadrons, both inclu-sively and on identified final states, from the primary q $q\bar q$ pair produced in the hard process. The measurements can be used to test the predictions of perturbative QCD and of the models commonly used to describe the non perturbative part of the fragmentation. New results presented by the DELPHI Collaboration are here discussed.