2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 16, 613-634
DOI 10.1007/s100520000443

Inclusive production of $\mathrm{\pi^0}$, $\eta$, ${\rm\eta^{\prime}(958)}$, ${\rm K^0_{\rm S}}$ and ${\rm\Lambda}$ in two- and three-jet events from hadronic Z decays

The ALEPH Collaboration

R. Barate - et a.

Laboratoire de Physique des Particules (LAPP), IN2P3-CNRS, 74019 Annecy-le-Vieux Cedex, France

Received: 2 August 1999 / Published online: 6 July 2000 - © Springer-Verlag 2000

Abstract
The production rates and the inclusive cross sections of the isovector meson ${\rm\pi^0}$, the isoscalar mesons $\eta$ and ${\rm\eta^{\prime}(958)}$, the strange meson ${\rm K^0_{\rm S}}$ and the ${\rm\Lambda}$ baryon have been measured as functions of scaled energy in hadronic events, two-jet events and each jet of three-jet events from hadronic Z decays and compared to Monte Carlo models. The analysis is based on 3.7 million hadronic events collected with the ALEPH detector at LEP at a centre-of-mass energy of $\sqrt{s}=91.2$ GeV. The JETSET modelling of the gluon fragmentation into isoscalar mesons is found to be in agreement with the experimental results. HERWIG fails to describe the K0S spectra in gluon-enriched jets and the ${\rm\Lambda}$ spectra in quark jets.


Copyright Società Italiana di Fisica, Springer-Verlag 2000