R. Barate et al., Inclusive production of pi(0), eta, eta '(958), K-S(0) and Lambda in two- and three-jet events from hadronic Z decays, EUR PHY J C, 16(4), 2000, pp. 613-634
The production rates and the inclusive cross sections of the isovector meso
n pi(0), the isoscalar mesons eta and eta'(958), the strange meson K-S(0) a
nd the Lambda baryon have been measured as functions of scaled energy in ha
dronic events, two-jet events and each jet of three-jet events from hadroni
c 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 cent
re-of-mass energy of root s = 91.2 GeV. The JETSET modelling of the gluon f
ragmentation into isoscalar mesons is found to be in agreement with the exp
erimental results. HERWIG fails to describe the K-S(0) spectra in gluon-enr
iched jets and the A spectra in quark jets.