2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 17, 207-222
DOI 10.1007/s100520000449

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

Abstract
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 $\pi^+$, 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, $\xi^*$, of the $\xi$-distributions for kaons in gluon and quark jets are observed to be different.


Copyright Società Italiana di Fisica, Springer-Verlag 2000