Identified charged particles in quark and gluon jets
The DELPHI Collaboration
P.Abreu22 - et al.
22 LIP, IST, FCUL - Av. Elias Garcia, 14-1o,
1000 Lisboa Codex, Portugal
Received: 24 January 2000 / Revised version: 15 May 2000
Published online: 8 September 2000 - © Springer-Verlag 2000
A sample of 2.2 million hadronic Z decays, selected from the data recorded by the DELPHI detector at LEP during 1994-1995 was used for an improved measurement of inclusive distributions of , K+ and p and their antiparticles in gluon and quark jets. The production spectra of the individual identified particles 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. A significant proton enhancement in gluon jets is observed indicating that baryon production proceeds directly from colour objects. The maxima, , of the -distributions for kaons in gluon and quark jets are observed to be different.
Copyright Società Italiana di Fisica, Springer-Verlag 2000