Study of charge multiplicity in hadronic three-jet Z decays at LEP
V.A. Uvarov (IHEP, Protvino, Russia) (for the DELPHI Collaboration)
TL;DR
This paper measures the mean charge multiplicity in hadronic three-jet Z decays at LEP, compares it with theoretical models, and extracts the gluon contribution, providing insights into QCD color factors and gluon jet properties.
Contribution
It provides the first measurement of the gluon contribution to charge multiplicity in three-jet Z decays and determines the QCD color factor ratio C_A/C_F.
Findings
Measured charge multiplicity as a function of event topology.
Determined the QCD color factor ratio C_A/C_F.
Extracted the gluon contribution to multiplicity across energies.
Abstract
The mean charge multiplicity in hadronic three-jet Z decays has been measured with the DELPHI detector as a function of the event topology and compared with recent theoretical calculations. The QCD colour factor ratio C_A/C_F was determined, and the gluon contribution to this multiplicity was extracted giving a measurement of the mean charge multiplicity of a two-gluon colour-singlet system as a function of the effective c.m. energy covering the range from 16 to 52 GeV.
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