Inclusive Particle Production at LEP

TL;DR

This paper presents new measurements of inclusive light-flavor hadron production in Z decays at LEP, revealing phenomenological patterns and a proton enhancement in gluon jets, advancing understanding of hadronization.

Contribution

It provides the first detailed comparison of hadron production in quark and gluon jets at LEP, highlighting direct baryon production from color objects.

Findings

Total production rates follow phenomenological laws based on particle properties.

Significant proton enhancement observed in gluon jets.

Results support models of baryon production directly from color sources.

Abstract

New results on inclusive production of Sigma^- and Lambda(1520) and on proton production in quark and gluon jets are presented. These results are based on 2 million hadronic Z decays collected with the DELPHI detector at LEP. They are compared with the results of other LEP experiments and with models. It has been shown that the total production rates of all light-flavour hadrons measured so far at LEP 1 follow phenomenological laws related to the spin, isospin, strangeness and mass of the particles. A significant proton enhancement in gluon jets is observed, indicating that baryon production proceeds directly from colour objects.